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Dissertations / Theses on the topic 'High speed steel properties'

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Published: 4 June 2021

Last updated: 16 February 2022

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1

Amen, S. A. "Processing, mechanical and wear properties of BT1 high-speed steel." Thesis, University of Bradford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355216.

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2

Komatsubara, N. "Microstructure and mechancial properties of rapidly solidified tool steels." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276570.

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3

Harlin, Peter. "On the processing of starch consolidated high speed steel - microstructure and tribological properties /." Göteborg : Borlänge : Chalmers University of Technology ; Dalarna University College, 2008. http://publications.lib.chalmers.se/cpl/record/index.xsql?pubid=70098.

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4

Jonck, Jacobus. "Characterization of industrial high speed steel roll material and effect of annealing prior to heat treatment on the structure and properties." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/61297.

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Hot strip mills (HSM) are used to roll cast slabs down from their initial size to plate or sheet, which is then used to manufacture a wide variety of goods for many industrial markets. The working rolls that contact and deform the strip are arguably the primary element of the hot strip mills. The work rolls must have sufficient strength to apply the mechanical force to the strip, while still resisting the wear and thermal stresses inherent to the process. The history of the development of these work rolls spans more than a hundred years. The more recent advancement in work roll technology was

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5

Saikoff, Elsa, Edvin Andersson, Felix Bengtsson, et al. "Cobalt in High Speed Steels." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355124.

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One of the most important additives in High Speed Steels (HSS) is cobalt, mainly for its effect on the hot properties. Based on statistic data about the increased price of cobalt and its negative effect on human health, an ethical and financial barrier in the steel industry have occurred. In order to solve the problem, it is of great importance to examine the future cobalt price and accessibility, as well as examine the possibility of finding alternative substitutes to cobalt. The purpose of this project was therefore to examine alternatives to cobalt as an alloying element in HSS. A qualitati

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6

Saunders, Nathan David. "High Speed Friction Stir Spot Welding on DP 980 Steel:Joint Properties and Tool Wear." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3003.

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With the desire to improve passenger safety and fuel efficiency, Ultra High Strength Steels (UHSS) have been developed for use in the automotive industry. UHSS are high strength steels with high ductility and strength. DP 980 is one of these UHSS being applied in automobile manufacturing. DP 980 is difficult to join with Resistance Spot Welding (RSW) because of the high carbon content and alloying in this material. The weld becomes brittle when it solidifies during the welding process. With the desire and motivation of widely using UHSS, new welding processes are needed to be developed in orde

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7

Rhodes, Nigel Anthony. "The growth, structure and properties of sinter-necks in mixed ferrous powder systems." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263406.

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8

Bratberg, Johan. "Phase equilibria and thermodynamic properties of high-alloy tool steels : theoretical and experimental approach." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-453.

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9

Lee, Trevor J. "Investigation of ASTM E 238 Bearing Pin Properties for Various Aerospace Alloys." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1074.

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Aircraft are often designed with numbers determined by testing in a lab, rather than by repeatedly building prototypes. These lab tests conform to testing specifications so that the numbers can be compared between manufacturers, suppliers, and lab technicians. One such specification is ASTM specification E238 – 84(08), and it is used to determine important properties of a bearing pin joint like hinges, bolt holes, and rivet joints. The properties determined from this fastener-through-plate method are bearing strength, bearing yield strength, and bearing stiffness. Adhering to the methods outli

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10

Wang, Yu. "Mechanical properties and microstructure of laser sintered and starch consolidated iron-based powders." Doctoral thesis, Karlstad : Faculty of Technology and Science, Materials Engineering, Karlstads universitet, 2008. http://www.diva-portal.org/kau/abstract.xsql?dbid=1593.

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11

Crust, Glen Alexander. "The nitriding of high speed steel cutting tools." Thesis, University of Plymouth, 1989. http://hdl.handle.net/10026.1/2379.

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There is an interest in industry in cost reduction. Tool wear constitutes an important element in the cost of many metal working processes, not only because of the cost of the tool, but also because of the cost of machine downtime. Saltbath nitriding of high speed steel tools adds only about 1% to the cost of a finished tool, but has been found to confer benefits considerably in excess of this over a range of cutting conditions . A series of cutting tests is described, during which cutting forces and tool temperatures were recorded simultaneously using microcomputer based instrumentation devel

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12

Whittle, Neville C. "Titanium nitrate coated high speed steel cutting tool inserts." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/10850.

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A detailed study has been made of commercially produced, powder metallurgy, BT42 grade high speed steel (H.S.S.) indexable cutting tool inserts coated with a thin layer of titanium nitride (TiN) by chemical vapour deposition (C.V.D.). The characteristics of the coating before and after the obligatory substrate heat treatment were first ascertained using various techniques including X-ray diffraction, Auger electron spectroscopy, fractography, scanning and transmission electron microscopy, microhardness testing, profilometry, optical microscopy and scratch-adhesion testing. It was found that th

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13

Wyatt, John. "High-speed face and end milling of stainless steel grades." Thesis, Southampton Solent University, 2002. http://ssudl.solent.ac.uk/630/.

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High speed machining was developed over sixty years ago and at present is still limited to just a few materials, these being aluminium and its alloys, hardened steels for the mould and die industry and titanium for aerospace applications. Recently there has been additional work in high speed machining on some of the more exotic aerospace alloys such as inconel and nimonic alloys. This thesis addresses the problems encountered when machining high chromium/nickel steel alloys that are part of the stainless steel family. Three grades of stainless steel were selected for this purpose, these being

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14

Lam, Y.-K. "Properties of high speed spun nylon 6.6 filaments." Thesis, University of Leeds, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234343.

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15

Gunning, Victoria Allyce. "Extracting fluid properties through high-speed video analysis." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106014.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 90-92).<br>We explore a non-contact method to measure changes in fluid properties by analyzing refractive motion in high speed video. We present a method of extracting fluid properties by performing video motion analysis usi

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16

Harris, I. D. "High-speed GMAW and laser GMAW hybrid welding of steel sheet." Thesis, Cranfield University, 2009. http://dspace.lib.cranfield.ac.uk/handle/1826/4571.

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Arc welding is the most widely used set of joining technologies in industry today. The automotive tier supplier network and light manufacturing are significant users of arc welding, particularly gas metal arc welding (GMAW) and pulsed GMAW (GMAW-P). For sheet metal welding the majority of welds are single pass fillet welds on T-butt, lap, or edge joints. A fundamental problem and limitation to the use of higher travel speeds in GMAW is the phenomenon of weld bead humping, a weld profile defect with a wavelike profile to the weld bead that has peaks and troughs in the longitudinal direction.

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17

Kishawy, Hossam Eldeen A. "Chip formation and surface integrity in high speed machining of hardened steel /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/NQ42858.pdf.

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18

Garza-Montes-de-Oca, Nelson Federico. "Oxidation and wear behaviour of a work roll grade high speed steel." Thesis, University of Sheffield, 2008. http://etheses.whiterose.ac.uk/6104/.

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The oxidation behaviour of high speed steel (1.55 % C, 7.70 % Cr, 4.90 %V, and 2.00% Mo) was studied isothermally at 550 and 615'C for three different environmental conditions, two of which consisted in a mixture of dry air and water vapour flowing at a rate of 0.45 or 1.45 cm'/min respectively, compared to dry air conditions. At 615'C and for the maximum water vapour content, the oxidation behaviour was initially logarithmic followed by linear stage. In contrast, for a water vapour flow rate of 0.45 CM3/Min, the oxidation was parabolic, which resulted in a greater mass gain of the samples aft

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19

Naeem, Zakia. "Chemically vapour deposited α-alumina coatings on high speed steel cutting tools". Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/14130.

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A detailed study has been made of the atmospheric pressure chemical vapour deposition (CVD) of aluminium oxide (Al2O3) coatings on powder metallurgy (PM) BT42 grade high speed steel (HSS) indexable cutting tool inserts. To facilitate this, a laboratory-scale CVD reactor was initially designed and purpose-built. The literature on the effect of process parameters on Al203 coatings chemically vapour deposited on cemented carbide substrates was comprehensively surveyed. With reference to deposition conditions quoted in this literature, a series of trial Al203 coating runs were then performed using

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20

Toledo, García Gustavo A. "High temperature compression testing of hardened steels for plasticity behavior modeling." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/16909.

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21

Karki, Utsab. "Experimental and Numerical Study of High-Speed Friction Stir Spot Welding of Advanced High-Strength Steel." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5521.

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With the desire to lighten the frame while keeping or increasing the strength, Advanced High-Strength Steels (AHSS) have been developed for use in the automotive industry. AHSS meet many vehicle functional requirements because of their excellent strength and acceptable ductility. But joining AHSS is a challenge, because weldability is lower than that of mild steels. Friction stir spot welding (FSSW) is a solid state joining process that can provide a solution to the weldability issues in AHSS, but FSSW has not been studied in great detail for this application. In this work, Si3N4 tools were us

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22

Sarma, Abhijit. "High strain properties of advanced high strength spot welded steels." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5997.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 14, 2008) Includes bibliographical references.

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23

Doi, Tatsuya. "Interaction of lifecycle properties in High Speed Rail systems operation." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105565.

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Thesis: S.M. in Engineering Systems, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 221-224).<br>High-Speed Rail (HSR) has been expanding throughout the world, providing various nations with alternative solutions for the infrastructure design of intercity passenger travel. HSR is a

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24

Lewus, Michael O. "Chemically vapour deposited titanium carbide coatings on high speed steel cutting tool inserts." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/7276.

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A detailed study has been made of titanium carbide (TiC) coatings chemically vapour deposited on powder metallurgy (PM) BT42 grade high speed steel (HSS) indexable cutting tool inserts, in collaboration with Edgar Allen Tools, Sheffield. Initially, the characteristics of a TiC coating deposited under the standard conditions employed by Edgar Allen Tools were determined, both before and after the obligatory HSS substrate heat treatment. This was done using various techniques including x-ray diffraction, scanning electron microscopy, micro-hardness testing, profilometry, optical microscopy and s

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25

Biswas, Souvik. "Simulation of thermo-mechanical deformation in high speed rolling of long steel products." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-1027103-203032/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: product geometry; hot rolling; high speed rolling; rolling simulation; bar and rod rolling; free surface; finite element analysis. Includes bibliographical references (p. 69-75).

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26

Pirouznia, Pouyan. "High cycle fatigue properties of stainless martensitic chromium steel springs." Thesis, KTH, Materialteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-103201.

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For many materials and components like in high speed trains and airplanes fatigue failures occur in the range of over 107 load cycles which is called the high cycle fatigue range. A modern version of the springs was invented which are applied in a certain application. Ultrasonic fatigue testing (20 kHz machine) was conducted for evaluating the steel of the springs. This research explores the fundamental understanding of high cycle fatigue testing of strip steel and assesses a stainless martensitic chromium steel at the high cycle fatigue range. Finite element modeling was conducted to gain kno

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27

Kim, Tae Hyun. "Fatigue of surface engineered steel in rolling-sliding contact." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325019.

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28

Caccialupi, Alessandro. "Systems development for high temperature, high strain rate material testing of hard steels for plasticity behavior modeling." Thesis, Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180051/unrestricted/caccialupi%5Falessandro%5F200312%5Fms.pdf.

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29

Peabody, Frank Gerald. "An investigation of high speed, thin steel rotor, annular, double sided, linear induction motors." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29056.

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The objective of this dissertation is to analyse the performance of a linear induction motor suitable to drive a circular saw blade. A selection of analytical methods available from the field of electrical machine theory was used to investigate the particular type of motor. The theoretical analysis is supported by an extensive experimental investigation. Although LIMs have been designed, analyzed and applied in other applications, significant differences exist between those LIMs and the one used for the new application. These include: the annular shaped motor, the smaller air gap, and the rot

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30

Alcock, J. R. "Magnetic domains in high strength constructional steels." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233698.

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31

Dixon, Philip R. "The thermomechanical properties of 224-carbon steel at high strain rates." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/6821.

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32

Runiewicz, Anna. "Microstructure, sliding wear and corrosion properties of high nitrogen martensitic steel /." Düsseldorf : VDI-Verl, 2008. http://d-nb.info/991188292/04.

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33

Qu, Jinbo 1971. "Effect of microstructure on static and dynamic mechanical properties of high strength steels." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103281.

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The high speed deformation behavior of a commercially available dual phase (DP) steel was studied by means of split Hopkinson bar apparatus in shear punch (25m/s) and tension (1000s-1) modes with an emphasis on the influence of microstructure. The cold rolled sheet material was subjected to a variety of heat treatment conditions to produce several different microstructures, namely ferrite plus pearlite, ferrite plus bainite and/or acicular ferrite, ferrite plus bainite and martensite, and ferrite plus different fractions of martensite. Static properties (0.01mm/s for shear punch and 0.001s -1

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34

Christiansen, Christoffer. "Material choice for a rotor in a switched reluctance high speed motor." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-62582.

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With the increasing environmental impact from the automotive industry, electric vehicles become more and more popular. This combined with the great breakthroughs in fast electronics the switched reluctance motor (SRM) has again gained popularity in recent years. Due to its cheap and rugged construction it is a good alternative to the permanent magnet motors and to the induction motor. The ́two main problems holding the SRM back are torque ripple and the acoustic noise generated from it. A lot of research is currently being performed in order to find a solution to these issues. This thesis has

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35

Håkansson, Kenneth. "Weld Metal Properties for Extra High Strength Steels." Doctoral thesis, KTH, Production Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3403.

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36

Crowe, David Charles. "The high temperature electrochemical behavior of carbon steel in alkaline sulfide solutions." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25567.

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The high temperature, high pressure electrochemical behavior of A516 Gr. 70 carbon steel in aqueous alkaline sulfide solutions was studied by means of polarization tests and cyclic volt-ammetry. The effects of variation of temperature (90-150°C), sulfide concentration (0-3 m), scan rate (1-50 mV/s) and scan range, and the effects of stirring and polarization at the switching potentials between scans were investigated. Passivation was consistent with formation of a protective Fe₂O₃ film. An understanding of the electrochemical behavior of iron in the alkaline sulfide solutions was facilitated

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37

Woll, Joakim. "Soil Steel Composite Bridges for High-Speed Railways : 2D FEM analysis of the Björnbo Bridge." Thesis, KTH, Bro- och stålbyggnad, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-153227.

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This research aims to analyse the dynamic behaviour of Soil-Steel Composite Bridges when subjected by high-speed trains. the analyses of the dynamic response for these structures are needed since there is little research performed in the present field of knowledge. Since there is also in need to perform separate dynamic analysis for these structures to verify their dynamic response, the dynamic behaviour must be analysed. The research are performed in 2D FE-models in the commercial FE-program Brigade/PLUS since there is of interest to analyse if simplified 2D-models can predict the dynamic beh

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38

Andersson, Nils-Eric. "Structure and properties of thick plate and near surface properties after high speed machining af AA7010 /." Linköping : Univ, 2003. http://www.bibl.liu.se/liupubl/disp/disp2003/tek822s.pdf.

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39

Keehan, Enda. "Effect of microstructure on mechanical properties of high strength steel weld metals." Thesis, University of Cambridge, 2004. https://www.repository.cam.ac.uk/handle/1810/218395.

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The effects of variations in alloying content on the microstructure and mechanical properties of high strength steel weld metals have been studied. Based on neural network modelling, weld metals were produced using shielded metal arc welding with nickel at 7 or 9 wt. %, manganese at 2 or 0.5 wt. % while carbon was varied between 0.03 and 0.11 wt. %. From mechanical testing, it was confirmed that a large gain in impact toughness could be achieved by reducing the manganese content. Carbon additions were found to increase strength with only a minor loss to impact toughness as predicted by the mod

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40

Salman, Omar. "Selective laser melting of 316L stainless steel and related composites: processing and properties." Technische Universität Dresden, 2019. https://tud.qucosa.de/id/qucosa%3A34253.

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Unter den verschiedenen additiven Fertigungsverfahren stellt das selektive Laserschmelzen (SLM) eine optimale Technologie für die Herstellung von metallischen Bauteilen mit komplexen Geometrien und hervorragenden Eigenschaften dar. SLM-Bauteile werden Schicht für Schicht mit hochenergetischen Laserstrahlen hergestellt, was das SLM flexibler als konventionelle Produktionstechnologien wie das Gießen macht. Die beim SLM auftretenden schnellen Aufheiz-/Kühlraten können zu deutlich unterschiedlichen Gefügen im Vergleich zu herkömmlichen Herstellungsverfahren führen. Die beim SLM entstehenden Hocht

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41

Niu, Caotan. "A study of tool life and machinability parameters in high speed milling of hardened die steels." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39557170.

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42

Baharudin, B. T. Hang Tuah. "Experimental investigation of high speed micro machining of H13 tool steel and titanium alloy 6-4." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494133.

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High-accuracy miniaturized components are increasingly in demand for various industries such as aerospace, biomedical, electronics, environmental, communication and automotive, and this coupled with new developments of High Speed Machining (HSM) has led to the emergence of a strong and viable technology in High Speed Micro Machining. This technology is very important in bridging the macro-domain and the nano- and micro- domains for making functional miniaturized components. High speed Micro Machining is a specific technology where high spindle speeds, high performances cutting tools and high a

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43

Niu, Caotan, and 牛草坛. "A study of tool life and machinability parameters in high speed milling of hardened die steels." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39557170.

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44

Toh, Chun Kiong. "Evaluation of cutter path strategies and orientations when high speed milling hardened AISI H13 work tool steel." Thesis, University of Birmingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422919.

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The use of High Speed Milling (HSM) for the production of moulds and dies is becoming more widespread. Critical aspects of the technology include cutting tools, machinability data, cutter path generation and technology. Much published information exists on cutting tools and related data (cutting speeds, feed rates, depths of cut, etc.), however, relatively little information has been published on the evaluation of cutter paths for this application. Most of the research work is mainly focused on cutter path generation techniques. Works with regard to cutter path evaluation on tool wear and tool

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45

Lang, Valentin, Teja Roch, and Andrés Fabián Lasagni. "World record in high speed laser surface microstructuring of polymer and steel using direct laser interference patterning." SPIE, 2016. https://tud.qucosa.de/id/qucosa%3A35095.

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Periodic surfaces structures with micrometer or submicrometer resolution produced on the surface of components can be used to improve their mechanical, biological or optical properties. In particular, these surfaces can control the tribological performance of parts, for instance in the automotive industry. In the recent years, substantial efforts have been made to develop new technologies capable to produce functionalized surfaces. One of these technologies is Direct Laser Interference Patterning (DLIP), which permits to combine high fabrication speed with high resolution even in the sub-micro

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46

Kuo, Ching-Ying, and 郭鑑瑩. "High-Temperature Oxidation Properties of Unbalanced magnetron PVD coating TiAlCN film on High Speed Tool Steel." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/49086311574956280393.

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碩士<br>國立高雄第一科技大學<br>機械與自動化工程所<br>91<br>Most 3C industry in operation has to meet high precision, high speed and fine dimension demand, the traditional existed cutting tool has it’s limitation . Especially when we processing the P.C. board, the cooling oil is prohibited in order to prevent of creating pollution problem. Therefore cutting tool is easily worn out in this high speed cutting and no cooling oil environment due to temperature increased, which will cost the production cost increase rapidly. In order to meet this requirement, this paper will develop a coated film-TiAlCN which produ

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47

Wright, Christopher S., K. W. Dalgarno, and M. M. Dewidar. "Processing conditions and mechanical properties of high speed steel parts fabricated using direct selective laser sintering." 2003. http://hdl.handle.net/10454/4129.

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No<br>This paper reports the results of an investigation into the selective laser sintering of a prealloyed high-speed steel powder. The structured development of processing conditions for single lines, single layers and multiple layers of material is reported, as are the flexural modulus and strength of the single- and multiple layer components. Infiltration with bronze was used to improve the mechanical properties of the components and it is concluded that selective laser sintering of high-speed steel allied to bronze infiltration can produce material with the mechanical properties to allow

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48

Yow, J.-S., and 游瑞松. "On Tribological Properties of TiAlN Coatings Deposited on High Speed Steel by Cathodic Arc Evaporation." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/45919929093270050909.

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碩士<br>國立中興大學<br>材料工程學研究所<br>85<br>In this research,TiAlN films were deposited on high speed steel( SKH9) by cathodic arc evaporation.The effect of TiAl interlayer on the tribological properties of TiAlN films were investigated. The characteristics of the ternary TiAlNfilms have the properties of high hardness ,abrasion resistance and excellent chemical stability which all contribute to the success of TiN.A graded TiAlN structure is defined as a continuous variation of the various components

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49

Chu, Chin-te, and 朱晉德. "Study on mechanical and tribological properties of TiCrN films on SKH9 high speed steel by CAP method." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/41493422599480232531.

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碩士<br>正修科技大學<br>機電工程研究所<br>94<br>In this study, the cathodic arc plasma system with Ti and Cr target mate-rial is used to deposit CrN, TiN and TiCrN coating on the high-speed steel (SKH9) substrate under different vacuum values, and mechatronical recipro-cating friction tester with ball-on-block type is employed to investigate theeffects of different process parameters on the surface structure and mechani-cal properties of coating film. Moreover, the surface morphology and filmcomposition are observed by SEM and EDS. Experimental results are shown as follows: sample of C4 (wt.%: Ti 60.48, Cr 1

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Yu, Tsung-Han, and 游宗翰. "The characteristics of microstructure phase transformation and mechanical properties in GPM A30 powder metallurgy high speed steel." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/12736424047698399445.

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博士<br>國立臺灣大學<br>材料科學與工程學研究所<br>94<br>The effect of tempering on the decomposition of retained austenite in a powder metallurgy (PM) high-speed steel, GPM A30, has been monitored with a high-speed dilatometer. The corresponding microstructures of specimens with different tempering cycles have been investigated by a combination of scanning electron microscopy and analytical transformation electron microscopy. The as-quenched structure of the steel studied is composed of retained austenite, untempered martensite and carbides. The results indicate that the complete transformation of retained auste

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