Gotowe bibliografie tematyczne / STEEL FINISHING

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Gotowa bibliografia na temat „STEEL FINISHING”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "STEEL FINISHING"

Wu, Bao Cai, Feng Shi, Xin Yu Cheng, Rui Min Lin i Chun Ming Liu. "Microstructures and Textures During Annealing in Low Carbon Al-Killed Steels with Low Finishing Temperatures and High Coiling Temperatures". Advanced Materials Research 194-196 (luty 2011): 52–55. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.52.

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Microstructures and textures after annealing at 680°C in low carbon Al-killed steels with low finishing temperature and high coiling temperature were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM) and X-Ray Diffractometer (XRD). The results show that higher coiling temperature and lower finishing temperature can both cause the appearance of equiaxed grain and line cementite. The equiaxed grain in 2# steel with higher coiling temperature is the more obvious. Advantage textures are weak in the steels with higher coiling temperature and lower finishing temperature and volume fraction of {111}fiber in 2# steel with higher coiling temperature is only 7.17%, so the stamping property should be worse.

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Gao, Bing, Bo Wang i Jian Qi Zou. "Anti-Pulls Out Strength Research on Concretes Component of Low-Alloy Coupled Steels and Cold Rolling Belt Rib Steel Bars". Applied Mechanics and Materials 121-126 (październik 2011): 2537–40. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.2537.

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Both Low-alloy Coupled Steels and Cold rolling belt rib steel bars are cold finishing steel bars. In project practice, Anchor ability of Low-alloy Coupled Steels Concrete will higher than cold rolling belt rib steel bars. So, more economical steel bars and cement contents. Through comparative trial about on concretes component of Low-alloy coupled steels and cold rolling belt rib steel bars in this article. Summarizes that anchor ability of Low-alloy coupled steels are depending transverse steel, well, steel bars and concretes has the better joint work ability.

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Mesquita, Rafael Agnelli, i Reinhold S. E. Schneider. "Tool Steel Quality And Surface Finishing of Plastic Molds". Exacta 8, nr 3 (16.02.2011): 307–18. http://dx.doi.org/10.5585/exacta.v8i3.2442.

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Plastic industry is today in a constant growth, demanding several products from other segments, which includes the plastic molds, mainly used in the injection molding process. Considering all the requirements of plastic molds, the surface finishing is of special interest, as the injected plastic part is able to reproduce any details (and also defects) from the mold surface. Therefore, several aspects on mold finishing are important, mainly related to manufacturing conditions – machining, grinding, polishing and texturing, and also related to the tool steel quality, in relation to microstructure homogeneity and non-metallic inclusions (cleanliness). The present paper is then focused on this interrelationship between steel quality and manufacturing process, which are both related to the final quality of plastic mold surfaces. Examples are discussed in terms of surface finishing of plastic molds and the properties or the microstructure of mold steels.

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SHANE, ROBERT E. "FINISHING STEEL FOR EXTERIOR SERVICE". Advanced Manufacturing Processes 2, nr 1-2 (styczeń 1987): 199–200. http://dx.doi.org/10.1080/10426918708953188.

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Okada, Akira, Yoshiyuki Uno, Hiroaki Watanabe, Kunihiko Fujiwara i Kenji Doi. "Surface Modification of Stainless Steel for Surgical Tool by EB-Polishing". Key Engineering Materials 407-408 (luty 2009): 339–42. http://dx.doi.org/10.4028/www.scientific.net/kem.407-408.339.

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A new surface finishing method by large-area electron beam irradiation (EB-polishing) for stainless steels for orthopedic surgical tool was proposed in our previous paper, and it was shown that high-efficient surface finishing was possible by the EB-polishing. In this report, the surface structure of EB-polished stainless steel is analyzed by TEM and EDX. Also, surface modification effects such as resistance to corrosion and blood repellency are evaluated. Then, the applicability of the EB-polishing as a new surface modification method of stainless steel for orthopedic surgical tool is discussed.

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Grigoriev, Sergey N., Alexander S. Metel, Tatiana V. Tarasova, Anastasia A. Filatova, Sergey K. Sundukov, Marina A. Volosova, Anna A. Okunkova, Yury A. Melnik i Pavel A. Podrabinnik. "Effect of Cavitation Erosion Wear, Vibration Tumbling, and Heat Treatment on Additively Manufactured Surface Quality and Properties". Metals 10, nr 11 (19.11.2020): 1540. http://dx.doi.org/10.3390/met10111540.

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The paper is devoted to researching various post-processing methods that affect surface quality, physical properties, and mechanical properties of laser additively manufactured steel parts. The samples made of two types of anticorrosion steels—20kH13 (DIN 1.4021, X20Cr13, AISI 420) and 12kH18N9T (DIN 1.4541, X10CrNiTi18-10, AISI 321) steels—of martensitic and austenitic class were subjected to cavitation abrasive finishing and vibration tumbling. The roughness parameter Ra was reduced by 4.2 times for the 20kH13 (X20Cr13) sample by cavitation-abrasive finishing when the roughness parameter Ra for 12kH18N9T (X10CrNiTi18-10) sample was reduced by 2.8 times by vibratory tumbling. The factors of cavitation-abrasive finishing were quantitatively evaluated and mathematically supported. The samples after low tempering at 240 °C in air, at 680 °C in oil, and annealing at 760 °C in air were compared with cast samples after quenching at 1030 °C and tempering at 240 °C in air, 680 °C in oil. It was shown that the strength characteristics increased by ~15% for 20kH13 (X20Cr13) steel and ~20% for 12kH18N9T (X10CrNiTi18-10) steel than for traditionally heat-treated cast samples. The wear resistance of 20kH13 (X20Cr13) steel during abrasive wear correlated with measured hardness and decreased with an increase in tempering temperatures.

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Guan, Xin, Zhong Qi Dong, Min Chen, Jian Lu Yuan, Jun Wei Fu i Yan Yan Zhang. "Flexible Rolling Technology of Spring Steel 60Si2Mn". Advanced Materials Research 1037 (październik 2014): 7–10. http://dx.doi.org/10.4028/www.scientific.net/amr.1037.7.

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The mechanical properties of 60Si2Mn were investigated with the cooling rate changing under new finishing temperature. Results showed: the mechanical properties of 60Si2Mn plate depend on the finishing temperature and the cooling rate changing. The microstructure of ferrite and pearlitic lamellar is thinning, and sorbitic content and HV increase with the cooling rate increasing under the same finishing temperature.

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BOTELHO, Tamires Isabela Mesquita, Paulo Lourenço MONTEIRO JUNIOR, Maria Adrina Paixão de Sousa DA SILVA, Rosimar Batista DA SILVA i Alexandre Saldanha DO NASCIMENTO. "A TECHNICAL VIABILITY ANALYISIS OF USE OF THE CARAPA GUIANENSIS OIL (ANDIROBA OIL) AS CUTTING FLUID IN THE TURNING PROCESS OF THE ABNT 1020 AND 1045 STEEL GRADES". Periódico Tchê Química 16, nr 31 (20.01.2019): 440–49. http://dx.doi.org/10.52571/ptq.v16.n31.2020.446_periodico31_pgs_440_449.pdf.

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In machining, the proper selection of cutting fluids result in benefits that vary from superior quality of the machined component to manufacturing cost. In addition, the must have characteristics that do not harm the user and the environment. In this sense, this work evaluates the effects of the vegetable base oil extracted from Carapa Guianensis in the external cylindrical turning process of the ABNT 1020 and 1045 steel grades. Highspeed steel tools were tested under roughing and finishing conditions. In addition to the physico-chemical characterization (dynamic viscosity at 40 °C and pH) of fluid, the chip form, surface finish, tool wear and workpiece temperature were evaluated. After characterization of oil, there were recorded in the dynamic viscosity at 40 °C of 0.11 Pa.s and pH of 2.3. The average roughness recorded were very close to those usually reported in the literature for finishing turning for ABNT 1020 and 1045 steels. It was also observed that the workpiece temperatures were higher when machining the ABNT 1020 steel grade under finishing condition than for other steel and conditions tested. Based on these findings, the andiroba oil delivered the conventional coolant technique demonstrated to be a technically viable alternative to conventional coolants in the turning process of ABNT 1020 and 1045 steels, because of it biodegradability characteristics and to reduce petroleumbased cutting fluids in the machining processes.

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Mesquita, Rafael Agnelli, i Reinhold S. E. Schneider. "Tool Steel Quality And Surface Finishing of Plastic Molds DOI: 10.5585/exacta.v8i3.2442". Exacta 8, nr 3 (16.02.2011): 307–18. http://dx.doi.org/10.5585/exactaep.v8i3.2442.

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Ngamkham, Komsan, Satian Niltawach i Somrerk Chandra-ambhorn. "Mechanical Adhesion and Pickling Behaviour of Thermal Oxide Scales on Hot-Rolled Low Carbon Steel Strips Produced by Different Finishing Temperatures". Materials Science Forum 696 (wrzesień 2011): 170–75. http://dx.doi.org/10.4028/www.scientific.net/msf.696.170.

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Hot-rolled low carbon steel strips were produced using two different finishing temperatures at 910 and 820 °C in an industrial hot-rolling line. Mechanical adhesion of scale on the steel substrate at 40 mm from the edge was investigated by tensile test. It was found that the strain initiating the first spallation of scale produced at higher finishing temperature was lower. Spallation ratio which is a spalled area of scale divided by the total area of scale examined under an optical microscope was steeper when the scale was produced at higher finishing temperature. The lower values of strain initiating the first spallation and the higher values of spallation ratio of scale formed both at higher finishing temperature were due to higher thickness of that scale. Pickling behaviour of the hot-rolled steels was investigated by immersing the studied steels in a 10%v/v HCl solution at 80 °C. X-ray diffraction (XRD) peak of hematite relative to that of iron decreased with pickling time and approached zero during pickling periods from 3 to 10 s, while magnetite-and-iron ratio gradually decreased and tended to be zero at longer pickling time. This might indicate the existence of hematite as the outermost layer of scale and subscale containing magnetite as the inner part.

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Rozprawy doktorskie na temat "STEEL FINISHING"

Nel, Johannes. "An assessment of corporate entrepreneurship in the finishing units of steel manufacturer / H. Nel". Thesis, North-West University, 2009. http://hdl.handle.net/10394/3749.

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Corporate entrepreneurship is examined with specific reference to the Finishing units of the Vanderbijlpark site of ArcelorMittal South Africa. The objective of the study is to assess the level of intrapreneurship within middle to upper employee levels in order to make recommendations regarding the encouragement of an entrepreneurial climate. The evaluation starts with a historic overview of ArcelorMittal South Africa, followed by an assessment of the current operational characteristics of the company. An evaluation of ArcelorMittal's interaction with its stakeholders is combined with the outcomes of two previous internal surveys of corporate culture to arrive at the causal factors to the study. A literature review is conducted to explore entrepreneurship and the attributes of an entrepreneur. Subsequently, corporate entrepreneurship is investigated in order to outline the characteristics, pivotal agents, importance and dangers of the concept. The establishment of a climate of corporate entrepreneurship was found to be dependent on the presence of 14 important constructs. If proposed steps are followed to promote corporate entrepreneurship in a company, five identified success factors will improve as a result. A questionnaire is adapted to test for the presence of the 14 constructs of a climate of corporate entrepreneurship which were identified and to verify current perceptions regarding the organisational success of the company among B to G role respondents functioning in the Finishing units of ArcelorMittal Vanderbijlpark. A target group of 325 employees was identified and questionnaires were routed to all persons in the group. A total of 180 usable responses were received on which statistical analysis was based. The validity of each construct is individually determined by calculating a Cronbach alpha coefficient and tests for both statistical and practical significance are performed to determine the effect of demographical variables on each construct. An analysis is made of perceptions regarding the presence of constructs of a climate of corporate entrepreneurship as well as constructs indicating the success of the organisation. Furthermore, the effect of demographical variables on recorded perceptions is interpreted. Recommendations, based on the analysis made as well as the literature review, are made on actions to improve the climate of corporate entrepreneurship in ArcelorMittal South Africa. The study concludes with a measurement of the achievement of objectives and suggestions for further research.
Thesis (M.B.A.)--North-West University, Vaal Triangle Campus, 2010.

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Gale, Ken W. "An expert system for the predictive condition monitoring of a hot steel strip finishing mill". Thesis, Cardiff University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533557.

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Ho, Ho-chuen Federick, i 何浩全. "Ferrous metal balance of Hong Kong: consumption, waste generation, recycling and disposal". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B3125374X.

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Gilmore, Rhys. "An Evaluation of Ultrasonic Shot Peening and Abrasive Flow Machining As Surface Finishing Processes for Selective Laser Melted 316L". DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1935.

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Additive Manufacturing, and specifically powder bed fusion processes, have advanced rapidly in recent years. Selective Laser Melting in particular has been adopted in a variety of industries from biomedical to aerospace because of its capability to produce complex components with numerous alloys, including stainless steels, nickel superalloys, and titanium alloys. Post-processing is required to treat or solve metallurgical issues such as porosity, residual stresses, and surface roughness. Because of the geometric complexity of SLM produced parts, the reduction of surface roughness with conventional processing has proven especially challenging. In this Thesis, two processes, abrasive flow machining and ultrasonic shot peening, are evaluated as surface finishing processes for selective laser melted 316L. Results of these experiments indicate that AFM can reliably polish as-built internal passages to 1 µm Ra or better but is unsuitable for passages with rapidly expanding or contracting cross-sections. AFM can also polish relatively small passages, but lattice components may prove too complex for effective processing. USP cannot achieve such low surface roughness, but it is a versatile process with multiple advantages. Exterior surfaces were consistently processed to 1.7 to 2.5 µm Ra. Interior surfaces experienced only partial processing and demonstrated high geometric dependence. USP significantly hardened the surface, but steel media hardened the surface better than ceramic media did. Both AFM and USP are recommended processes for the surface finishing of SLM manufactured parts. Good engineering judgement is necessary to determine when to use these processes and how to design for post-processing.

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Filípek, Timotej. "Obrábění těžkoobrobitelných materiálů dokončovacími technologiemi". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444264.

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The Master‘s thesis focuses on processing of hard-to-machine materials by the finishing machining methods. The first chapter comprises division and characteristics of finishing technologies in the field of machining processes. The chapter following includes division and characteristics of the hard-to-machine materials. The experimental part – another significant part of the thesis – is focused on grinding of mostly bearing rings made of hard-to-machine materials. The aim of the experimental part is to compare and subsequently assess the use of various kinds of grinding wheels in the grinding process of a given workpiece material. Several parameters are examined from the technological and economic point of view. The assessment of the experimental part provides an overview on the advantages and disadvantages of the use of the grinding wheels in the grinding process of a given material for large-scale production. The conclusion is a summary of the results obtained in the experimental part.

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Nunes, Eduardo. "Inter-relationship of skin pass, 2D and 3D roughness parameters, stampability and paintability on cold rolled steel sheets for the automotive industry". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-24112014-151802/.

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The aim of this research work is to study the inter-relationship, under controlled industrial conditions, among skin pass reductions, surface topography characterized by 2D and 3D roughness parameters, stampability and painted surface finish quality for automotive steel sheet stampings. Different surface textures obtained from cold rolling finishing have been evaluated in terms of paint appearance (rating and spectral curve) and tentatively related to roughness parameters (2D and 3D) obtained from the cold finished sheets. Some relevant tendencies have been established amongst these parameters. The results presented here are in accordance with other recently published research showing that there is a clear relationship between these parameters, and that further detailed studies are needed.
O foco do presente trabalho é o estudo, em condições industriais, da inter-relação entre grau de redução do passe de acabamento, topografia superficial caracterizada pelos parâmetros de rugosidade 2D e 3D, estampabilidade e aparência de pintura de chapas de aço para painéis automotivos. Diferentes texturas superficiais de chapas de aço foram analisadas em termos de aparência de pintura (rating e curvas espectrais) e tentativamente relacionadas com os parâmetros de rugosidades (2D e 3D) obtidos na chapa antes de estampar. Algumas tendências relevantes foram estabelecidas entre estes parâmetros. Os resultados presentes aqui estão de acordo com publicações recentes mostrando uma clara relação entre estes parâmetros e que trabalhos futuros ainda são necessários.

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Junior, Jaime Casanova Soeiro. "Soldabilidade metalúrgica do aço ASTM A553 tipo I com 9% de níquel". Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-28022018-104215/.

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A soldagem altera as propriedades mecânicas dos aços ligados ao níquel, em especial seu desempenho em aplicações criogênicas. Assim, este trabalho apresenta um estudo sobre a soldabilidade metalúrgica do aço com 9% níquel e tem como objetivos: identificar se a fragilização em temperatura abaixo da temperatura Ac3 ocorre em ZACs com dois e três ciclos térmicos simulados fisicamente; analisar as características da junta soldada pelo processo de soldagem por atrito linear com mistura e os efeitos da soldagem multipasse; e analisar a influência dos passes de enchimento e acabamento sobre o comportamento mecânico da ZAC da raiz de uma junta soldada pelo processo de soldagem MIG/MAG. Destacam-se entre os resultados da simulação física da ZAC: as amostras que tiveram a temperatura máxima abaixo da temperatura Ac1, no terceiro ciclo térmico, não apresentaram o efeito de redução da energia absorvida no ensaio Charpy V; a fração volumétrica de austenita retida não aumenta a quantidade de energia absorvida no ensaio Charpy V para as amostras que tiveram a temperatura máxima do segundo ciclo térmico abaixo da temperatura Ac3 (723°C); e a correlação linear múltipla sugere um modelo empírico, baseado nos dados deste trabalho, onde os fatores de fração volumétrica do microconstituinte martensita-austenita, fração volumétrica de austenita retida e tamanho de grão são mais relevantes para a quantidade de energia absorvida no ensaio Charpy V. Destacam-se entre os resultados da soldagem por atrito linear: a energia absorvida no ensaio Charpy V da zona misturada do primeiro cordão (CP1) é menor que o metal de base; o segundo cordão gera duas regiões na zona misturada do primeiro cordão, que tendem a aumentar a energia absorvida no ensaio Charpy V; os valores de energia absorvida no ensaio Charpy V apresentam correlações lineares simples com a microdureza, a fração volumétrica do microconstituinte martensita-austenita e com o tamanho de grão. Destacam-se entre os resultados da soldagem com MIG/MAG: A soldagem do aço com 9% de níquel com a liga Inconel 625 gera uma zona não misturada entre o metal de solda e a ZAC; a amostra com todos os passes de solda (CP3) apresenta a menor energia absorvida no ensaio Charpy V entre todos os experimentos; e a trinca, no ensaio Charpy V, propaga na zona não misturada no CP1 e no CP2, que tiveram as maiores energias absorvidas no ensaio Charpy. O CP3 apresenta propagação de trinca na linha de fusão e possui a menor energia absorvida no ensaio Charpy V.
Welding modify the mechanical properties of nickel steels, especially their performance in cryogenic applications. Thus, this work presents a study on the metallurgical weldability of 9% nickel steel and its objectives are: identify if the embrittlement in temperature below the Ac3 temperature occurs in HAZs with two and three thermal cycles simulated physically; analyze the characteristics of the joint welded by friction stir welding process and the effects of multipass welding; and analyze the influence of the filling and finishing passes on the mechanical behavior of HAZ from the root of a joint welded by the GMAW welding process. The results of the physical simulation of the HAZ were: the samples that had the maximum temperature below the temperature Ac1, in the third thermal cycle, did not present the effect of reduction of the energy absorbed in the Charpy V test; the retained austenite volumetric fraction does not increase the amount of energy absorbed in the Charpy V test for the samples having the maximum temperature of the second thermal cycle below the Ac3 temperature (723 °C); and the multiple linear correlation suggests an empirical model, based on the data of this work, where the volumetric fraction factors of the martensite-austenite microconstituent, retained austenite volumetric fraction and grain size are more relevant for the amount of energy absorbed in the Charpy V test. The FSW welding highlights results: the energy absorbed in the Charpy V test of the mixed zone of the first pass (CP1) is smaller than the base metal; the second pass generates two regions in the mixed zone of the first pass, which tend to increase the energy absorbed in the Charpy V test; the values of energy absorbed in the Charpy V test show simple linear correlations with the microhardness, the volumetric fraction of the martensite-austenite microconstituent and with the grain size. The GMAW welding highlights results: welding of the steel with 9% nickel with the Inconel 625 alloy makes an unmixed zone between the weld metal and the HAZ; the sample with all weld passes (CP3) shows the lowest energy absorbed in the Charpy V test among all the experiments; and the crack, in the Charpy V test, propagates in the unmixed zone in CP1 and CP2, which had the highest energies absorbed in the Charpy test. The CP3 shows crack propagation in the melting line and has the lowest energy absorbed in the Charpy V test.

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Grub, André Mangetti. "Avaliação do Desempenho de Fluidos de Corte Contaminados no Processo de Torneamento do Aço Inoxidável Austenítico V304UF". Universidade Federal de Uberlândia, 2013. https://repositorio.ufu.br/handle/123456789/14943.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
In machining processes the main functions of cutting fluids (FC) are cooling and lubrication of the tribological system comprised of the workpiece, the chip and the cutting tool. When adequately chosen and correctly applyed they may raise tool lives, reduce machining forces and improve the surface finishing of the workpiece. However, during their use, research has demonstrated that water based cutting fluids (emulsions and solutions) become suceptible to microbiological contamination (by bacterias) that uses nutrients encountered in their composition to grow and reproduce. According to the specialised literature, the metabolic activities of these microorganisms degrade the cutting fluids, altering their chemical and phisycal properties. However, the study of this theme is limited and there is no research work that quantitatively indicates the influence of these contaminants in the machinability parameters. Therefore, the present work has the main objetctive of quantifying three machinability parameters (cutting force, surface roughness and tool life) when turning V304UF stainless steel using two water based cutting fluids (emulsion of vegetable base and semi-syntetic of mineral base). These two cutting fluids were intentionaly contaminated in an induced manner by periodic inoculations up to a mean contamination of 105 UFC/mL. With this procedure it was possible to compare the eficiency of new and contminated cutting fluids during the turning process. The results showed that the contaminated cutting fluids with 105 UFC/mL changed the pH, destabilized the emulsions and caused small changes in the machinability parameters (maching force, surface roughness and tool life), mainly under low cutting speeds and feed rates. Thus, the contamination of the cutting fluids, particularly the vegetable base ones, can promote small influences in important machinability parameters.
Em processos de usinagem as principais funções dos fluidos de corte (FC) são refrigerar e lubrificar o sistema tribológico constituído pela peça, cavaco e ferramenta. Quando escolhidos e aplicados corretamente, eles podem aumentar a vida da ferramenta, diminuir as forças de usinagem e melhorar o acabamento da peça fabricada. No entanto ao longo de sua utilização, pesquisas apontam que os FC s à base de água (emulsões e soluções) tornam-se susceptíveis a contaminação microbiológica (bactérias) que usam nutrientes encontrados em sua composição para crescerem e se reproduzirem. Segundo a literatura especializada, as atividades metabólicas destes microrganismos degradam os FC s, alterando suas propriedades físicas e químicas. Entretanto, o estudo desse assunto é limitado, e não há trabalhos que indicam quantitativamente a influência desses fluidos contaminados nos parâmetros de usinagem. Deste modo, este trabalho teve como principal objetivo quantificar três índices de usinabilidade (forças de usinagem, acabamento superficial e vida da ferramenta) no processo de torneamento do Aço Inoxidável Austenítico V304UF, utilizando dois FC s aquosos (emulsionável de base vegetal e semissintético mineral). Esses FC s foram contaminados de forma induzida através de inoculações periódicas até alcançarem o nível de contaminação média igual a 105 UFC/mL. Deste modo, foi possível comparar a eficiência dos FC s novos com os contaminados no processo de torneamento. Os resultados mostraram que as contaminações dos FC s com 105 UFC/mL, alteraram o pH do meio, desestabilizaram as emulsões e causaram pequenas mudanças nos parâmetros de forças de usinagem, rugosidade e vida da ferramenta, principalmente nas condições com baixa velocidade de corte e taxas de avanço. Assim, para baixas velocidades de corte, os fluidos de corte contaminados, principalmente de base vegetal, podem causar pequenas influências em importantes parâmetros de usinabilidade do processo.
Mestre em Engenharia Mecânica

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Shao, Yinan. "Surface Finishing and Corrosion Resistance of 3D Printed Maraging Steel". Thesis, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-48635.

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3D printing, also known as additive manufacturing (AM), has got rapidly developed since 1987. Compared with conventional manufacturing methods, 3D printing provides some advantages such as increasing material utilization and less waste of material. Maraging steel provides good strength and toughness without losing ductility, which has been used for the 3D printing technique. Selective laser melting (SLM) is one of the 3D printing methods, which is mostly used for metal and alloy powder. In this thesis, selective laser melting will be used for maraging steel. 3D printing maraging steel is a new material, the research about the properties of 3D printing maraging steel is still ongoing. Corrosion resistance is one of the most important properties of maraging steel due to the high cost of corrosion. So this thesis will focus on the corrosion behavior of 3D printing maraging steel. The purpose of this thesis was to find the best heat treatment condition for high corrosion resistance and to find the relationship between microstructure and corrosion behavior of maraging steel. In this thesis, several kinds of maraging steel samples with different heat treatment conditions were used. SLM, SLM austenized&quenched, SLM aged, conventional austenized&quenched, and conventional aged. Besides, two kinds of solutions were produced, NaOH (pH=11.5) and Na2SO4 (pH=6.5). To observe the microstructure, an optical microscope was used. The grain size is different between SLM and conventional samples, and also different between the samples with different heat treatment conditions. The potentiodynamic polarization method was used to measuring the corrosion behavior. SLM samples have much lower current density, and the passivation potential and the corrosion rate are similar compared with conventional samples. But due to the lack of further experiments, the relationship between corrosion behavior could be affected by the combined effect of several factors.

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Chen, Yan-Ting, i 陳彥廷. "Effect of Magnetic Brush Direction on Abrasive Finishing of Stainless Steel Cylindrical Surface". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/de26nf.

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碩士
國立中山大學
機械與機電工程學系研究所
107
In this study, a horizontal magnetic brush tool composed of iron powders was used to investigate the effects of the load (0.5 N~1.05 N), the iron powder weight (0.1 g~0.2 g) and the magnetic brush shaping (natural forming, pre-shaping) on the contact area and height after the contact between the magnetic brush and the workpiece. When the workpiece and the tool were not rotating, the contact area and the height of the magnetic brush increased along with the weight of the iron powders. In addition, as the load increased, the contact area also increased, while the magnetic brush height decreased and then approached a saturation value. The contact area of the pre-shaped magnetic brush was smaller than that of the naturally formed magnetic brush; and the height of the pre-shaped magnetic brush was greater than that of the naturally formed magnetic brush. When the workpiece is rotated and the tool is not rotating, the contact area was slightly increased and the magnetic brush height was slightly decreased. The magnetic brush shifted in the direction of rotation of the workpiece, and some of the magnetic brush links was broken. When both the workpiece and the tool were rotated, the contact area was greatly increased, and the height of the magnetic brush was greatly reduced. Finally, the 304 stainless steel cylindrical workpiece was polished using circulating cutting fluid mixed alumina abrasive grains and iron powders to observe the variation of the surface roughness of the workpiece at the weight 0.2 g of the iron powders, the load of 0.65 N, the pre-shaping magnetic brush, and the rotating tool. Results showed that the surface roughness could decreases from Ra =0.257 µm、Rmax = 1.025 µm to Rmax = 0.091 μm、Ra = 0.021 μm after a polishing time of 8 minutes at the rotating speed 400 rpm of workpiece, and the rotating speed 60 rpm of the tool.

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Książki na temat "STEEL FINISHING"

1937-, Yamakawa Kōji, i Fujikawa Hisao, red. Recent advances in coated steels used for automobile. Amsterdam: Elsevier, 1996.

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Prentzas, Lampros. The effect of surface finishing on pitting corrosion of stainless steel. Birmingham: University of Birmingham, 1999.

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Janet, Rex, i Society for Protective Coatings, red. SSPC painting manual. Wyd. 8. Pittsburgh, PA: Society for Protective Coatings, 2000.

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H, Christer A., red. A pilot study on maintenance strategy of finishing mill roll change equipment at Llanwern, British Steel. Salford: University of Salford Department of Mathematics and Computer Science, 1995.

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Practical design of steel structures: Based on Eurocode 3 (with case studies) : a multibay melting shop and finishing mill building. Dunbeath: Whittles Publishing, 2010.

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(Firm), Knovel, red. ASM handbook: Properties and selection: irons, steels, and high-performance alloys. Materials Park, OH: ASM International, 1990.

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Heinemann, W. W. Whole crop barley, corn and triticale silage in steer growing and finishing diets. [Pullman, Wash.]: Agriculture Research Center, College of Agriculture and Home Economics, Washington State University, 1986.

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(Firm), Knovel, red. ASM handbook: Powder metal technologies and applications. Materials Park, OH: ASM International, 1998.

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(Firm), Knovel, red. ASM handbook: Metalworking: sheet forming. Materials Park, OH: ASM International, 2006.

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(Firm), Knovel, red. ASM handbook: Corrosion: materials. Materials Park, OH: ASM International, 2005.

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Części książek na temat "STEEL FINISHING"

Schlegel, Joachim. "Finishing". W The World of Steel, 357–68. Wiesbaden: Springer Fachmedien Wiesbaden, 2023. http://dx.doi.org/10.1007/978-3-658-39733-3_9.

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Borsellino, C., E. Lo Valvo i V. F. Ruisi. "Wiper Tools in Turning Finishing of Quenched Steel". W AMST’05 Advanced Manufacturing Systems and Technology, 175–82. Vienna: Springer Vienna, 2005. http://dx.doi.org/10.1007/3-211-38053-1_16.

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Paladugu, Mohanchand. "Lubricant-Induced White Etching Cracks: Mechanism and Effects of Surface Finishing". W Bearing Steel Technologies: 12th Volume, Progress in Bearing Steel Metallurgical Testing and Quality Assurance, 131–46. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2020. http://dx.doi.org/10.1520/stp162320190112.

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Wilbert, André Driemeyer, Barbara Behrens, Olaf Dambon i Fritz Klocke. "Robot Assisted Manufacturing System for High Gloss Finishing of Steel Molds". W Intelligent Robotics and Applications, 673–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33509-9_67.

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Suárez, Lucia, G. Bourdon, X. Vanden Eynde, M. Lamberigts i Yvan Houbaert. "Tertiary Scale Behaviour during Finishing Hot Rolling of Steel Flat Products". W THERMEC 2006 Supplement, 732–37. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-429-4.732.

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Wang, H., Jian Jiang Zhou i Wen Ji Xu. "The Research of Carbon Steel Surface Finished by Pulse Electrochemical Finishing Technology". W Advances in Abrasive Technology VIII, 573–78. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-974-1.573.

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Daichi, Yoshiaki, Sadao Sano, Y. Uno i A. Okada. "Surface Finishing of SKD 11 Tool Steel via Plasma-Based Electron Beam Irradiation". W Optics Design and Precision Manufacturing Technologies, 302–7. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-458-8.302.

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Toh, Boon Loong, Sharan Kumar Gopasetty, Arun Prasanth Nagalingam, Joselito Yam II Alcaraz, Zhang Jing, Swee Hock Yeo i Abhay Gopinath. "Vibratory Finishing of Laser Powder Bed Fused Stainless Steel 316 Internal Cooling Channels". W Lecture Notes in Mechanical Engineering, 13–16. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5763-4_3.

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Kanthale, V. S., i D. W. Pande. "Experimental Study of Process Parameters on Finishing of AISI D3 Steel Using Magnetorheological Fluid". W Advanced Engineering Optimization Through Intelligent Techniques, 739–48. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8196-6_65.

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Li, Zhi Yong, Zong Wei Niu i H. Ji. "Surface Microscopic Characteristics Analysis on Electrochemical Mechanical Finishing of Stainless Steel in NaNO3 Electrolyte". W Advanced Materials Research, 325–32. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-461-8.325.

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Streszczenia konferencji na temat "STEEL FINISHING"

Yamaguchi, Hitomi, Takeo Shinmura i Ryota Ikeda. "Study of Internal Finishing of Austenitic Stainless Steel Capillary Tubes by Magnetic Abrasive Finishing". W ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21000.

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This paper studies the internal finishing of capillary tubes using a Magnetic abrasive finishing process. Such tubes are used with nano-scale technologies and meet the demands of the present age in medical and chemical equipment. The finishing characteristics are influenced by the magnetic abrasive behavior against the inner surface of the capillary, which is controlled by the supplied amount of magnetic abrasive and the magnetic force acting on it. The development of the finishing unit identifies the characteristics of the magnetic field, which controls the magnetic force, required for the necessary magnetic abrasive behavior. Finishing experiments using SUS304 austenitic stainless steel capillary tube with 800 μm inner diameter demonstrate the effects of the supplied amount of the magnetic abrasive on the finishing characteristics, and the results suggest a standard method to determine the amount to achieve sufficient finishing. The run-out of the capillary while rotating at high speed under the cantilever tube support method causes instability of the magnetic abrasive behavior. The effects on the finishing characteristics are discussed, and a method to diminish the run-out is applied. Accordingly, this paper presents the conditions required for the internal finishing of capillary tubes and proposes methods to realize them. The internal finishing of 400 μm inner diameter capillary tubes conveys an understanding of the mechanisms involved and demonstrates the usefulness of the proposed methods.

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MUSIL, Vaclav, Marek SADILEK, Jiri KRATOCHVIL, Robert CEP i Jiri LICHOVNIK. "EVALUATION OF FINISHING MACHINING OF STAINLESS STEEL 1.4307". W METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.907.

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Yamaguchi, Hitomi, Fang Xu, Akhlesh Lakhtakia, Akash Tiwari i Satish T. S. Bukkapatnam. "Coloration of stainless-steel surfaces using magnetic abrasive finishing". W Surface Engineering and Forensics, redaktorzy Akhlesh Lakhtakia i Satish T. Bukkapatnam. SPIE, 2023. http://dx.doi.org/10.1117/12.2654747.

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Thomas, Arpit, i Anant Kumar Singh. "Magnetorheological Nano-Surface-Finishing of Tapered Cavity of Chrome Steel Punch". W ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2851.

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Abstract The need for finishing chrome steel punch has drastically increased in order to obtain products with high quality and productivity. Chrome steel finds its application in manufacturing of punch and dies because of its higher hardness as varies up to 62 HRC. The paper is focused on improving the productivity of chrome steel punch through improving the surface finish using magnetorheological finishing process with a solid rotating tool core. The traditional method used for finishing of the chrome steel punch involves diamond lapping where machining marks and surface micro cracks are observed. In punching operation, the punch undergoes adhesive wear which can be controlled if the surface finish of the punch is improved. The surface finish obtained after diamond lapping process is up to 408 nm range. In present work, the further finishing of the tapered cavity of chrome steel punch is carried out. The chrome steel punch workpiece is rotated in a direction opposite to the rotation of the tapered tool tip surface in order to efficiently perform the finishing operation. The final surface roughness value of the flat surface of circular tapered punch is obtained as 26 nm from 420nm while the roughness value of the tapered surface is obtained as 22 nm from 408 nm in 90 minutes of finishing.

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Nazari, Babak, Adel Esfahani i Hossein Zakerinia. "New Roll Alloys Concepts Using in Finishing Stands for Rebar Rolling". W Steel Properties & Applications in conjunction with Materials Science & Technology 2021. Association for Iron & Steel Technology, 2021. http://dx.doi.org/10.33313/280/009.

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Reins, Kermit, Neil S. Gow i Wade P. Krejdovsky. "PRE-FINISHING MILL MODERNIZATION ON THE STERLING STEEL ROD MILL". W 53º Seminário de Laminação. São Paulo: Editora Blucher, 2017. http://dx.doi.org/10.5151/1983-4764-27968.

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Tyagi, Pawan, Tobias Goulet, Nitt Chuenprateep, Robert Stephenson, Rudolph Knott, Antione Reddick, Devdas Shetty, Justin Schlitzer, Cordell Benton i Francisco Garcia-Moreno. "Chemical Polishing Based Surface Finishing of 3D Printed Steel Components". W ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88378.

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Reducing surface roughness is critical for improving the mechanical properties of metal 3D printed components. As produced laser sintered metal 3D printed components suffer from high surface roughness. This problem is enormously big for the 3D printed components with intricate geometries involving a large internal surface area. To address this issue, we performed chemical polishing of the 3D printed 316 steel components. After 30 minutes of chemical polishing the color of 3D printed steel components’ surface became dull grey to bright lustrous. According to optical profilometer study, the surface morphology improved dramatically. The Rq roughness parameter changed from ∼8 um to ∼0.6 um. We also applied chemical polishing on cubical metal 3D printed components with internal surfaces. This surface finishing method was equally effective for the internal and external surfaces.

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Singh, Manpreet, i Anant Kumar Singh. "Parametric Optimization for Nano-Finishing of the External Cylindrical Surfaces Using Rotating Core Magnetorheological Finishing Process". W ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6597.

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A rotating core magnetorheological finishing process has been developed to finish the external cylindrical surfaces at nano-level as the conventional finishing processes like grinding cannot meet the extreme precise requirement. The quality of finished cylindrical components estimated through its geometrical accuracy, material assets, and mechanical features. The macaroni making machine driving shaft is made up of mild steel where high quality of surface finish is required. In plastic toy industries, the mild steel punches are used where a high level of surface finish is required to increase the appearance of the products and to improve its geometrical accuracy. The MR finishing process can improve the external surface quality of the cylindrical components very precisely. This result in the improvement of prolongs functional performance of the components. In the present work, the optimum process parameters are experimentally investigated for nano-finishing of the mild steel cylindrical external surfaces using the rotating core magnetorheological (MR) finishing process. The rotation of tool core, the rotation of the cylindrical workpiece, the current, and the working gap are the control process parameters which affect the finishing performance i.e. percentage change in surface roughness value. So, the effects of these process parameters on the process response such as percentage change in surface roughness value have been analyzed using signal-to-noise ratios and mean response data. The current and the rotational speed of the tool core have been found as a considerable role for increasing the percentage change in roughness value. Further, the optimum magnitude of the process parameters are predicted as the current 3A, the rotational speed of tool 500 rpm, the rotational speed of the cylindrical workpiece 80 rpm and the working gap of 0.6 mm. With the finishing of these optimum process parameters on the present developed process, the average roughness Ra value of the external surface of the mild steel cylindrical is reduced to 60 nm from the initial Ra value of 600 nm in 90 minutes of finishing. The results of scanning electron microscopy test, mirror images and roughness graphs of the finished surface have confirmed that the present finishing process can fulfil the extreme precise requirement of surface quality which is not possible by the conventional finishing processes. The extreme precise requirement of the surface quality of the external cylindrical workpieces are dealing with mild steel punches in plastic toy industries, dies, and molds, macaroni making driving shafts, armature shaft, and shafts used in gear etc.

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Zhang, Zhi, Mats Söder i Ron Webber. "HYBRID STEEL ROLL GRADES FOR HOT STRIP MILL LATE FINISHING STANDS". W 54º Seminário de Laminação e Conformação. São Paulo: Editora Blucher, 2017. http://dx.doi.org/10.5151/1983-4764-30258.

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Li, Dongbin, Peng Wang, Chao Liang, Shan Cong, Ying Li i Ting Chen. "Development of automatic control system for finishing of precise flat steel". W Mechanical Engineering and Information Technology (EMEIT). IEEE, 2011. http://dx.doi.org/10.1109/emeit.2011.6023369.

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Raporty organizacyjne na temat "STEEL FINISHING"

Groeneveld. L51690 Evaluation of Modern X-70 HFER Line Pipe. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), maj 1992. http://dx.doi.org/10.55274/r0010316.

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In recent years, several pipe mills have produced heavy-wall, large diameter pipe from plates of microalloyed steels that were controlled-rolled to develop properties to meet the API 5LX Grade 70 or Grade 80 requirements and that were electric resistance welded (ERW) using advanced techniques. The use of advanced electric seam-welding practices on the steels produced using advanced steel making and processing methods offers the possibility of obtaining high strength line pipe at a lower cost than pipes produced from similar steels but with double submerged arc seam welds. The present study was undertaken to evaluate the properties of the pipe body and the ERW seam-weld region of a recently produced heavy-wall X70 line pipe. This report describes the evaluation of that pipe. The mechanical properties of the weld zone from this pipe were evaluated and reported under Task 18-89. Those data are included in this report. A high-frequency electric resistance welded (HFERW) X70 line pipe was evaluated to assess the strength properties, fracture behavior, thermal stability, and susceptibility to environmentally induced degradation that may affect its behavior in gas transmission service. A 20-inch-(508 mm)-diameter by 0.500-inch-(12.7 mm)-wall high-frequency, electric-resistance-welded (HFERW) X70 line pipe was evaluated to assess the strength properties, fracture behavior, thermal stability, and susceptibility to environmentally induced degradation that may affect its behavior in gas transmission service. The steel from which the pipe was produced was processed using advanced steel-making practices that resulted in a low sulfur content and was microalloyed with Cb, V, and Ti. The steel was controlled rolled with 75 percent of the rolling reduction being accomplished at temperatures below 1418 F (770 C); the finishing temperature was 1328 F (720 C) and the steel was hot coiled after finishing. The seam weld was produced by high frequency electric resistance welding and the seam weld region was post-weld normalized.

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Stokes, Rebecca S., Daniel D. Loy i Stephanie L. Hansen. Effects of Increased Inclusion of Algae Meal on Finishing Steer Performance and Carcass Characteristics. Ames (Iowa): Iowa State University, styczeń 2016. http://dx.doi.org/10.31274/ans_air-180814-422.

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Zehnder, C. M., A. DiCostanzo, L. B. Smith, D. B. Brown i J. M. Hall. Alfalfa leaf meal in finishing steer diets. Quarterly report, July 1, 1997--September 30, 1997. Office of Scientific and Technical Information (OSTI), październik 1997. http://dx.doi.org/10.2172/621886.

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Blank, Christopher, Daniel D. Loy i Stephanie L. Hansen. Evaluation of Sorghum Silage as an Alternative Forage in Growing and Finishing Diets on Steer Performance, Carcass Characteristics, and Nutrient Digestibility. Ames (Iowa): Iowa State University, styczeń 2017. http://dx.doi.org/10.31274/ans_air-180814-510.

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