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Academic literature on the topic 'Cementite'

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Published: 4 June 2021
Last updated: 3 March 2023

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Journal articles on the topic "Cementite"

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Bhadeshia, H. K. D. H. "Cementite." International Materials Reviews 65, no. 1 (January 11, 2019): 1–27. http://dx.doi.org/10.1080/09506608.2018.1560984.

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Yang, Yo Sep, S. Y. Park, Hyun Jo Jun, Chan Gyung Park, S. H. Lim, and D. Y. Ban. "Effects of Microstructure on the Fatigue Resistance of Steel Tire Cords." Materials Science Forum 475-479 (January 2005): 4125–28. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.4125.

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Effects of microstructural parameters on fatigue resistance (σFL) of the steel tire cords have been investigated experimentally from microscopic points of view. At first, microstructural parameters depending on carbon content have been identified by using transmission electron microscopy (TEM). The fatigue resistance of the steel tire cords depending on carbon content has been measured by using the Hunter rotating beam tester under the bending stress of 900 to 1500 MPa. The fatigue resistance was improved with increasing the carbon content from 0.7, 0.8 to 0.9 wt. % C, due to variations of microstructural parameters, such as lamellar spacing (λp), cementite thickness (tc), and volume fraction (Vc) of cementite. As the carbon content increased, the lamellar spacing and the cementite thickness decreased, while the volume fraction of cementites increased. The effects of microstructure on fatigue resistance have been discussed in terms of the microstructural parameters mentioned above.
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Kang, Seong Hoon, Hyung Cheol Lim, and Ho Won Lee. "Microstructures and Crack Formation in Hot Compression Test of Ultrahigh Carbon Steel." Key Engineering Materials 611-612 (May 2014): 162–66. http://dx.doi.org/10.4028/www.scientific.net/kem.611-612.162.

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Experimental works were carried out to investigate microstructure and crack formation during compression tests of 1.9wt%Cultrahigh carbon steel according to temperature and strain rate. As-received ultrahigh carbon steel is composed of precipitated cementites and pearlite matrix. In addition, numerous voids were observed in the matrix of as-received material. The compression tests at 800oC showed that the voids within the matrix are closed with increase of reduction ratio. On the other hand, when the reduction ratio increased numerous micro-cracks were newly formed in the bulky cementites and at the interfaces between hard cementite and soft matrix. It was also observed that because the volume fraction of cementite is reduced when temperature increased, volume fraction of newly formed micro-crack significantly decreased. Cast microstructures were observed after compression test at 1130oC due to local melting. From experimental results and microstructure anlayses, it was concluded that the forging temperature should be controlled at the temperature of more than 900oC and less than 1130oC.
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Fan, Xiao Hong, Bin Xu, and Cai Gao. "The Influence of Solvent Metal Microstructure on Synthetic Quality of Diamond Single Crystals." Advanced Materials Research 306-307 (August 2011): 1753–56. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1753.

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Diamond single crystals are synthesized using artificial graphite as carbon source and iron-based alloy as catalyst in a cubic anvil apparatus at high temperature and high pressure (HPHT). Four kinds of catalysts at different synthetic times are adopted in synthetic process. After synthesizing the microstructure of the solvent metal samples are characterized by means of scanning electron microscopy (SEM). The results show that when the synthetic quality is relatively superior, the more primary lathy cementites are well distributed and shows parallel growth of the stripe beams. Besides, the edge of the cementite is more even. So the synthesis time and catalyst composition commonly influence the solvent metal microstructure, especially the quantity and shape of cementite.
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Kurita, Masanori, and Akira Saito. "Dependence of Stress Constant on Microstructure of Quenched and Tempered Steels in X-Ray Stress Measurement." Advances in X-ray Analysis 35, A (1991): 519–25. http://dx.doi.org/10.1154/s0376030800009204.

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AbstractThe residual stress measurement of quenched and tempered steels is of practical importance because the quenching can sometimes induce the high residual stress which affects the strength of materials. The stress constants of carbon steels quenched and tempered at various temperatures were measured in order to determine the residual stress of steels by x-ray diffraction. The stress constant increased slowly with increasing tempering temperatures below 500°C; it increased rapidly with tempering temperatures above about 500°C, This rapid increase in the stress constant is closely related to the change in microstructure of the steels in tempering; above the tempering temperature of around 500°C, the tempered martensite recrystallized and transformed to ferritic iron and fine cementite particles dispersed in the matrix; these coalesced and grew to be speroidized cementites and finally laminar cementite plates.
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Todaka, Yoshikazu, Minoru Umemoto, and Koichi Tsuchiya. "Microstructural Change of Cementite in Carbon Steels by Deformation." Materials Science Forum 449-452 (March 2004): 525–28. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.525.

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Deformation and dissolution behavior of the cementite in eutectoid steels with pearlitic and spheroidite structures were studied using high resolution SEM and AFM. Cementite lamellae in deformed pearlite exhibited inhomogeneous slip, smooth thinning or necking, fragmentation and cleavage fracture. Complete dissolution of cementite lamellae and spheroidal cementite particles was observed in specimens deformed with large strains at high strain rates. The dissolution mechanism of cementite by heavy deformation was discussed.
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Zhang, Guo Hong, Dong Woo Suh, and Kai Ming Wu. "Effects of Mn, Si and Cr Addition on the Spheroidization of Cementite in Hypereutectoid Fe-1mass%C Steel." Materials Science Forum 783-786 (May 2014): 1053–57. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.1053.

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Effect of Mn, Si and Cr on spheroidization of cementite in Fe-1mass%C steel has been investigated over a range of austenitizing temperatures. In Fe-1C steel, a fully spheroidized structure is obtained but some large cementite particles are formed. The addition of 1.5 mass% Si or Cr accelerates spheroidization of cementite. An addition of Cr remarkably refine the cementite particle size, but the influence of Si addition on the cementite particle size is not remarkable. A fully spheroidized structure fails to develop in steel with the addition of 1.5% Mn under the condition used in present study. Some lamellar cementite still exist in the 1.5Mn steel. The pearlite-promoting effect of Mn is possibly attributed to the inhomogeneous distribution of cementite particles during the intercritical austenitization.
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Drapkin, B. M., G. M. Kimstach, and T. D. Molodtsoval. "Hardness of cementite." Metal Science and Heat Treatment 38, no. 9 (September 1996): 408–9. http://dx.doi.org/10.1007/bf01395649.

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Goodwin, T. J., S. H. Yoo, P. Matteazzi, and J. R. Groza. "Cementite-iron nanocomposite." Nanostructured Materials 8, no. 5 (August 1997): 559–66. http://dx.doi.org/10.1016/s0965-9773(97)00194-3.

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Huang, Jun Xia, and Jing Tao Wang. "Equal Channel Angular Pressing in a Pearlitic Structured Steel." Materials Science Forum 539-543 (March 2007): 4692–97. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.4692.

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Equal Channel Angular Pressing (ECAP) in a fully pearlitic structured steel 65Mn was successfully carried out at 923 K via route C in this study. The severe shear deformation of ECAP was accommodated by periodical bending, periodical shearing and shearing fracture etc in the pearlitic lamellae. The cementite in the pearlite has higher plastic deformation capability. Excessive imperfections may be introduced into the cementite, which supplies additional energy driving for the following spheroidization of cementite in subsequent processing. After five ECAP passes, the fully pearlitic lamellae evolved into a microstructure of ultrafine-grained ferrite matrix uniformly dispersed with finer cementite particles. The ferrite matrix is homogeneous with an average grain size of ~0.3 micrometers. Two possible mechanism for the spheroidization of cementite were proposed：heterogeneous growth of the fractured cementite fragments, and the precipitation of new fine spherical cementite particles through nucleation and growth.
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Dissertations / Theses on the topic "Cementite"

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Nikolussi, Marc. "Cementite in the Fe-N-C system." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-38396.

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Evteev, Alexander V., Elena V. Levchenko, Irina V. Belova, and Graeme E. Murch. "Molecular dynamics study of carbon diffusion in cementite." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193325.

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Evteev, Alexander V., Elena V. Levchenko, Irina V. Belova, and Graeme E. Murch. "Molecular dynamics study of carbon diffusion in cementite." Diffusion fundamentals 6 (2007) 15, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14189.

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Akbay, Taner. "Laser induced reaustenitisation from ferrite/cementite aggregates in steels." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410825.

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Farooque, Muhammad. "The study of proeutectoid Widmanstatten cementite in hypereutectoid steels." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314904.

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Kinap, Paulo Eduardo Barros. "Tratamentos térmicos para obtenção de cementita esferoidizada em ferro fundido nodular." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-11072017-145654/.

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O objetivo do presente trabalho, consistiu na obtenção de ferro fundidos nodulares, a serem utilizados na fabricação de eixos, com as seguintes características mecânicas após os tratamentos térmicos adequados: limites de resistência à tração e escoamento mínimos de 700 N/mm2 e 450 N/mm2 respectivamente, alongamento mínimo de 5% e dureza entre 235 à 285 HB. A microestrutura mais adequada à obtenção das características mecânicas desejadas deveria consistir de cementita esferoidizada numa matriz ferrítica, a ser obtida com o tratamento de recozimento ou revenimento de microestruturas previamente perlíticas ou martensíticas, respectivamente. No caso do tratamento de recozimento, as estruturas iniciais consistiram de perlita grossa mais ferrita, presentes no material no estado bruto de fusão, ou, de perlita fina mais ferrita, do material normalizado. Todos os tratamentos térmicos utilizados, dependendo do tempo de tratamento, permitiram a obtenção de cementita esferoidizada. O material normalizado e recozido durante 2 horas a 700ºC, possibilitou a obtenção das propriedades mecânicas desejadas: limites de resistência à tração e de escoamento de 827 N/mm2 e 547 N/mm2 respectivamente, alongamento de 7% e dureza de 277 HB, valores estes, dentro dos limites desejados no presente trabalho. No caso do material temperado e revenido a 700ºC durante 0,5 hora, obteve-se limites de escoamento de 542 N/mm2, alongamento de 6% e dureza de 246 HB. O tratamento de recozimento realizado durante 48 horas, produziu microestrutura quase totalmente ferrítica, com pequenas áreas de agregados de carbonetos. O restante do carbono migrou para os nódulos de grafita secundária ao redor dos mesmos.
The purpose of the present work, consisted in obtaining ductile casting iron, that will be used in the shaft production, with de following mechanical properties after the appropriated heat treatments: ultimate tensile strength and yield strength values of 700 N/mm2 and 450 N/mm2 minimum respectively, elongation of 5% minimum and hardness value from 235 to 285 HB. The microstructure more adequated to obtaining the desired mechanical characteristics should consist of spheroidized cementite in a ferritic matrix, to be obtained with the annealing or tempering treatments of microstructures previously pearlitic or martensitic respectively. In the case of the annealing treatment, the initial structures consisted of thick pearlite plus ferrite, wich were in the material in the ascast state, or fine pearlite plus ferrite, of the normalized material. All the used heat treatment, depending on the time of treatment, allowed the obtainment of spheroidized cementite. The material normalized and annealed for 2 hours at 700°C made possible the obtaining of the desired mechanical properties: ultimate tensile strength and yield strength value of 827 N/mm2 and 547 N/mm2 respectively, elongation of 7% and hardness values of 277 HB, values these, in acordance with the aims initially proposed in the present work. In the case of the material quenched and tempered at 700°C for 0,5 hour, it was obtained yield strength values of 542 N/mm2, elongation of 6% and hardness value of 246 HB. The annealing treatment made during 48 hours, produced a microstructure almost totally ferritic, with small areas of aggregated carbides. The remaining of the carbon migrated to the graphite nodules producing secondary graphite around them.
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Nikolussi, Marc [Verfasser]. "Cementite in the Fe-N-C system / vorgelegt von Marc Nikolussi." Stuttgart : Max-Planck-Inst. für Metallforschung, 2008. http://d-nb.info/995395667/34.

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Cowley, S. A. "Aspects of the bainite and proeutectoid cementite transformations in alloy steels." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375221.

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Ibitoye, SA, AA Adeleke, AO Tiamiyu, APL Popoola, and AA Afonja. "Response of cold briquetted IRon (CBI) to high temperatures treatment." Journal of Mining and Metallurgy, 2010. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000467.

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This investigation was carried out to assess the behaviours of Cold Briquetted Iron (CBI) when exposed to increasing temperature changes up to its complete melting. High-temperature behaviours and melting characteristics of CBI were studied. Ground as-received CBI briquette and those heated to temperatures ranging from 500°C to 1000°C were sieved to maximum of 30 microns diameter size and their room-temperature x-ray diffraction (XRD) measured. CBI was found to contain among others, α-iron, cementite and silica phases. Cementite was found to commence decomposition at 500°C - 600°C and completed by 700°C with conspicuous increase in the concentration of α-iron phase. Only α-iron and silica phases were sustained in CBI at temperatures above 700°C. In an inert atmosphere, it was discovered that CBI melted over a temperature range of 1527.3°C to 1536.96°C accompanied by an irrecoverable weight loss of 9.6 wt.% of the starting material. It was concluded that melting CBI would require charging along it appropriate fluxes to take care of the unreduced iron oxide and incorporation into facility for melting CBI an effective deslagging mechanism to remove unavoidable possible voluminous slag that would be formed.
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Longbottom, Raymond James Materials Science &amp Engineering Faculty of Science UNSW. "The formation of cementite from hematite and titanomagnetite iron ore and its stability." Awarded by:University of New South Wales. Materials Science and Engineering, 2005. http://handle.unsw.edu.au/1959.4/22023.

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This project examined the reduction and formation of cementite from hematite and titanomagnetite ores and cementite stability. The aim of the project was to develop further understanding of cementite stability under conditions relevant to direct ironmaking and the mechanism of cementite decomposition. The reduction of hematite and ironsand by hydrogen-methane-argon gas mixtures was investigated from 600??C to 1100??C. Iron oxides were reduced by hydrogen to metallic iron, which was carburised by methane to form cementite. The hematite ore was reduced more quickly than the ironsand. Preoxidation of the ironsand accelerated its reduction. Hematite was converted to cementite faster than preoxidised ironsand. The decomposition of cementite formed from hematite was investigated from 500??C to 900??C. This cementite was most stable at temperatures 750-770??C. The decomposition rate increased with decreasing temperature between 750??C and 600??C and with increasing temperature above 770??C. The stability of cementite formed from pre-oxidised titanomagnetite was studied from 300??C to 1100??C. This cementite was most stable in the temperature range 700-900??C. The rate of decomposition of cementite increased with decreasing temperature between 700??C and 400??C and with increasing temperature above 900??C. Cementite formed from ironsand was more stable than cementite formed from hematite
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Books on the topic "Cementite"

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Smith, Dwight K. Cementing. 2nd ed. New York City: H.L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers, 1990.

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Society of Petroleum Engineers (U.S.), ed. Cementing. Richardson, TX: Society of Petroleum Engineers, 1992.

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Smith, Dwight K. Cementing. New York: H.L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers, 1987.

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B, Nelson Erik, ed. Well cementing. Amsterdam: Elsevier, 1990.

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Guix, Gerard. El cementiri. Barcelona: Columna, 2013.

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B, Nelson Erik, and Guillot Dominique, eds. Well cementing. 2nd ed. Sugar Land, Tex: Schlumberger, 2006.

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1962-, Khan Mohammad Iqbal, and SpringerLink (Online service), eds. Supplementary Cementing Materials. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2011.

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Siddique, Rafat, and Mohammad Iqbal Khan. Supplementary Cementing Materials. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17866-5.

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Cementiri dels anglesos. València: 3 i 4 Edicions, 2008.

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Bofill, Fidel. Cementiri de Déus. [Spain]: Glauco, 1987.

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Book chapters on the topic "Cementite"

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Bhadeshia, Harshad K. D. H. "Cementite." In Theory of Transformations in Steels, 381–418. Boca Raton : CRC Press, 2021.: CRC Press, 2021. http://dx.doi.org/10.1201/9781003056782-8.

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Hao, Wang, Wang Fuxing, and Xu Kuangdi. "Cementite, Structure and Characteristic of." In The ECPH Encyclopedia of Mining and Metallurgy, 1–2. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0740-1_104-1.

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Evteev, Alexander V., Elena V. Levchenko, Irina V. Belova, and Graeme E. Murch. "Atomic Mechanism of Carbon Diffusion in Cementite." In Defect and Diffusion Forum, 101–6. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-55-8.101.

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Balak, Juraj, Xavier Sauvage, Duk Lak Lee, Choong Yeol Lee, and Philippe Pareige. "Cementite Decomposition of Pearlitic Steels during Cold Drawing." In Advanced Materials Research, 45–50. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-463-4.45.

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Furuhara, Tadashi, and Behrang Poorganji. "Formation of Ultrafine Grained Ferrite + Cementite Duplex Structure by Warm Deformation." In Advanced Steels, 495–500. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17665-4_49.

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Choe, Hui-Jin, Izuru Miyazaki, Tomoyuki Terai, Tomoyuki Kakeshita, Sukeyoshi Yamamoto, and Mitsuharu Yonemura. "Preferential Precipitation of Cementite in Ferrite under a High Magnetic Field." In PRICM, 687–93. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118792148.ch86.

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Choe, Hui-jin, Izuru Miyazaki, Tomoyuki Terai, Tomoyuki Kakeshita, Sukeyoshi Yamamoto, and Mitsuharu Yonemura. "Preferential Precipitation of Cementite in Ferrite under a High Magnetic Field." In Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing, 687–93. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48764-9_86.

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Gallego, J., A. M. Jorge Jr., and O. Balancin. "Microstructure Evolution during Warm Deformation of Low Carbon Steel with Dispersed Cementite." In Materials Science Forum, 505–10. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-443-x.505.

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Ivanisenko, Y., X. Sauvage, I. MacLaren, and H. J. Fecht. "Nanostructuring and Dissolution of Cementite in Pearlitic Steels During Severe Plastic Deformation." In Nanoscale Phenomena, 41–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00708-8_5.

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Altpeter, I., R. Kern, and P. Höller. "Characterization of Cementite in Steel and White Cast Iron by Micromagnetic Nondestructive Methods." In Nondestructive Characterization of Materials, 606–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-84003-6_72.

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Conference papers on the topic "Cementite"

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Gupta, Surendra Kumar, and Patricia Iglesias Victoria. "Atomic Force Microscopy of Annealed Plain Carbon Steels." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50972.

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Microstructure of annealed plain carbon steels is examined using optical microscopy. When the inter-lamellar spacing in pearlite is small, optical microscope at 1000X is unable to resolve the ferrite and cementite lamellae. In hyper-eutectoid steels, cementite in pearlite appears as darker phase whereas the pro-eutectoid cementite appears as a lighter phase. Atomic force microscopy (AFM) of etched steels is able to resolve ferrite and cementite lamellae in pearlite at similar magnifications. Both cementite in pearlite as well as pro-eutectoid cementite appear as raised areas (hills) in AFM images. Interlamellar spacing in pearlite increases with increasing hardenability of steel.
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Jin, Yuansheng, He Yang, Feng Wang, C. Minfray, and Shenghua Li. "Phase Structure and Lubricity of In-Situ Generated Protective Layer on Worn Metal Surfaces in Presence of Mg6Si4O10(OH)8." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63927.

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A mechanochemical reconditioner package has been investigated in our laboratory which could be used to generate an in situ protective layer on worn metal surfaces as a result of mechanochemical reactions between worn tribosurfaces, wear debris and a special reconditioner formulation. The main constituent in the reconditioner formulation chemistry is magnesium silicate hydroxide, Mg6(Si4O10)(OH)8. HRTEM analyses have displayed that the protective layer consists mainly of cementite nanocrystals with crystalline anisotropy. Nanoparticles of magnet iron oxide (Fe3O4) and iron peroxide (FeOOH) are dispersed on the habit planes of nanocrystalline cementite matrix. The protective layer obtained exhibits very smooth top surface and excellent tribological characteristics.
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"Cementite Residual Stress Analysis in Gas-nitrided Low Alloy Steels." In Residual Stresses 10. Materials Research Forum LLC, 2016. http://dx.doi.org/10.21741/9781945291173-24.

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Cryderman, Robert, Dalton Garrett, and Zachary Schlittenhart. "Effects of Rapid Induction Heating on Transformations in 0.6% C Steels." In HT2019. ASM International, 2019. http://dx.doi.org/10.31399/asm.cp.ht2019p0106.

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Abstract Rapid induction hardening of martensitic steel can attain the very high strength levels needed for light-weighting components subjected to high operating stresses. Specimens of martensitic 0.6% C steels were heat treated using a dilatometer to investigate the effects of heating rates of 5 to 500 °C/s to temperatures of 850 to 1050 °C on the transformation to austenite and subsequent transformation to martensite during quenching. Selected specimens were quenched after partial transformation to austenite to assess the initial cementite precipitate size formed in ferrite during heating. Other specimens were isothermally held at the austenitizing temperature to assess cementite dissolution rates. Higher heating rates increased the Ac1 and Ac3 temperatures, and lowered the Ms temperature. Alloy content and prior microstructure also influenced the transformation temperatures.
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Hu, Guiming, Changyu Zhou, Cheng Chen, and Na Lei. "Metal Dusting Corrosion of Alloy Cr5Mo in H2-CO Gas Mixtures." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77222.

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Metal dusting is a catastrophic phenomena of high temperature corrosion, which occurs in severe carburizing environments (carbon activity aC>1.0) at temperatures 400–900 °C. It causes not only phase changes but also removal of materials (pitting or thinning) and serious material deterioration. The present study focuses on the fundamental understanding of the corrosion of low alloy steels Cr5Mo in carbon-supersaturated environments (50CO-50H2) at 600 °C over different holding times. Scanning-electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), nano-indentation, and nano-scratch tester are used to investigate the microstructure and its mechanical properties. An interesting continuous thick layer composed of Ha¨gg carbide (Fe5C2) and less cementite (Fe3C) was present on top of the samples, which was ever observed in pure iron but not in alloy steels. This layer grew thicker with increasing holding times and showed very different mechanical properties with the carburized layer which was below the Ha¨gg carbide layer. And the carburized layer could not form a continuous and homogeneous layer of Fe3C even in longer holding times. The cementite only formed at grain boundaries. The results show that also as for low alloy steels at very high carbon activities a second iron carbide, Ha¨gg carbide (Fe5C2), forms on the surface instead of the decomposing process of the metastable carbide, cementite (Fe3C).
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Redkin, Konstantin V., C. Isaac Garcia, and Anthony J. DeArdo. "Microstructural Analysis of Thermite Welds." In ASME 2010 Rail Transportation Division Fall Technical Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/rtdf2010-42001.

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Thermite welding is a simple and cost-effective process widely used in the field for rail repair and joining. Despite the well-accepted use of this technology, there is a major concern regarding the soundness of the weldments which are often found to be very sensitive to wear and cracking. In order to gain a better understanding of the structural factors that contribute to the performance behavior of thermite welds, systematic microstructural analyses of a series of welds was conducted. Of particular interest in this study was to carefully examine and compare the microstructure of the weld metal, heat affected zone (HAZ) and base metal of a series of thermite welded samples with different carbon content. The results of this work revealed the presence of proeutectoid cementite along the prior austenite grain boundaries at the three locations examined. In addition, microhardness evaluation of the welds revealed that substantial softening takes place in the HAZ, independent of the chemical composition of the rails or weld processing conditions. The presence of proeutectoid cementite along the prior austenite grain boundaries and the softening that takes place in the HAZ are two of the structural factors most likely responsible for the lower than expected wear behavior observed in welded or repaired rail steels. This paper will present and discuss the microstructural and processing factors associated with the formation of proeutectoid cementite and the causes leading to the observed softening.
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Redkin, Konstantin V., C. Isaac Garcia, Anthony J. DeArdo, Daniel Gutscher, and Semih Kalay. "Microstructural Analysis of Thermite Welds." In 2010 Joint Rail Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/jrc2010-36086.

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Abstract:
Thermite welding is a simple and cost-effective process widely used in the field for rail repair and joining. Despite the well-accepted use of this technology, there is a major concern regarding the soundness of the weldments which are often found to be very sensitive to wear and cracking. In order to gain a better understanding of the structural factors that contribute to the performance behavior of thermite welds, systematic microstructural analyses of a series of welds was conducted. Of particular interest in this study was to carefully examine and compare the microstructure of the weld metal, heat affected zone (HAZ) and base metal of a series of thermite welded samples with different carbon content. The results of this work revealed the presence of proeutectoid cementite along the prior austenite grain boundaries at the three locations examined. In addition, microhardness evaluation of the welds revealed that substantial softening takes place in the HAZ, independent of the chemical composition of the rails or weld processing conditions. The presence of proeutectoid cementite along the prior austenite grain boundaries and the softening that takes place in the HAZ are two of the structural factors most likely responsible for the lower than expected wear behavior observed in welded or repaired rail steels. This paper will present and discuss the microstructural and processing factors associated with the formation of proeutectoid cementite and the causes leading to the observed softening.
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8

Kim, W., T. Wong, and P. Kwon. "A Model-Based Prediction Approach to Understanding Tool Wear." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/med-23322.

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Abstract Since the development of Taylor’s wear equation in the early 1900s, empirical approaches to tool wear have been extensively used by industries. However, as many types of work materials and cutting tools have emerged, developing the empirical equation for each combination of work material and cutting tool is too costly and time-consuming. In this paper, we present a promising new model-based approach, where the developed model can be directly extended to other work materials and cutting tools. However, when machining pearlitic steels at high cutting speed, phase transformation restricts the model’s applicability. With phase transformation, the associated flank wear does not follow the model’s predictions. Evidently, the abrasive action of cementite is suppressed as the cementite phase in pearlitic microstructure transforms into austenite. This paper summarizes and reevaluates our previous experimental results in order to develop a model-based approach to understanding and predicting tool wear.
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Yelsukov, E. P., A. I. Ulyanov, A. L. Ulyanov, A. A. Chulkina, A. N. Maratkanova, Miroslav Mashlan, and Radek Zboril. "Structure and Magnetic Properties of the Nanocrystalline (Mechanically Alloyed) and Annealed Cementite." In MÖSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE 2008: Proceedings of the International Conference—MSMS '08. AIP, 2008. http://dx.doi.org/10.1063/1.3030848.

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Yildiz, Tugce, Alaeddin Burak Irez, and Gokhan Sur. "Effect of cementite carbide tool coating type and tool radius on cutting performance." In 2016 7th International Conference on Mechanical and Aerospace Engineering (ICMAE). IEEE, 2016. http://dx.doi.org/10.1109/icmae.2016.7549512.

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Reports on the topic "Cementite"

1

Malhotra, V. M. Supplementary cementing materials for concrete. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/305059.

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Hortacsu, Ali, and Chad Syverson. Cementing Relationships: Vertical Integration, Foreclosure, Productivity, and Prices. Cambridge, MA: National Bureau of Economic Research, February 2007. http://dx.doi.org/10.3386/w12894.

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Camats Malet, Anna, Òscar Escala, Andreu Moya, Noemí Riudor, Enric Tartera, and Ares Vidal. Un cementiri per a dos exèrcits : les fosses comunes del Soleràs (1938-1939). Edicions i Publicacions de la Universitat de Lleida, 2021. http://dx.doi.org/10.21001/rap.2021.31.11.

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Armentano, Núria, Jordi Ramos Ruiz, and Cesc Busquets Costa. Soldats rebels de la Guerra Civil de 1936-1939 enterrats fora del cementiri de Figuerola d’Orcau (Isona i Conca Dellà, Pallars Jussà). Edicions i Publicacions de la Universitat de Lleida, 2021. http://dx.doi.org/10.21001/rap.2021.31.10.

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