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Dissertations / Theses on the topic 'Tool-steel Steel'

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Published: 4 June 2021

Last updated: 15 February 2022

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1

Medvedeva, Anna. "Tool steel for tool holder applications : microstructure and mechanical properties." Licentiate thesis, Karlstad : Faculty of Technology and Science, Materials Engineering, Karlstads universitet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2872.

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2

Hardell, Jens. "High temperature tribology of high strength boron steel and tool steels." Licentiate thesis, Luleå : Luleå University of Technology, 2007. http://epubl.ltu.se/1402-1757/2007/36/index.html.

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3

Karlsson, Patrik. "The influence of tool steel microstructure on galling." Doctoral thesis, Karlstad universitet, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-61013.

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In sheet metal forming (SMF) of materials such as stainless steels there is a major problem with transfer and accumulation of sheet material to the metal forming tool surface. The problem is known as galling; a sort of severe adhesive wear, which results in severe scratching of produced parts. In this thesis, the overall aim was to gain knowledge of the influence of tool steel microstructure on galling initiation under sliding conditions. It was discovered that material transfer and tool steel damage caused by sheet material flow creating wear-induced galling initiation sites occurred in the e

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4

Ridges, Christopher Shane. "Tool Life of Various Tool Materials When Friction Spot Welding DP980 Steel." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2502.

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In this study, friction spot welding was used to join DP980 steel sheet. Four different ultra-hard tool materials were used with the objective of determining which tool material produced the highest number of acceptable-strength welds. Three of the tools were composed of various mixtures of polycrystalline cubic Boron Nitride (PCBN), Tungsten, and Rhenium. These materials are referred to herein as Q60, Q70, and Q80, the "Qxx" designation denoting the percentage of the volume of the tool material composed of PCBN. The fourth tool tested was composed entirely of PCBN. The Q70 tool produced appro

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5

Larsson, Johanna Meseret Berhe. "Influence of tool steel carbide orientation on sliding wear." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-27205.

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For SMF industry, galling of tool in SMF operation during forming of stainless steel is a major concern, this increase the interest to study influence of tool microstructure on galling. In the present work, ingot cast AISI D2 were evaluated concerning wear mechanisms and critical sliding distance against austenitic stainless steel sheet in lubricated sliding condition at different contact pressures using a slider-on-flat-surface (SOFS) tribometer for carbide phases oriented in three different directions. At the initial sliding abrasive scratching by protruding carbide phases were the initial w

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6

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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7

Jonsson, Jonathan. "Different coatings effect on tool-life when milling hardened tool steels." Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36663.

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Abstract This thesis work is about finding out which coating should be used for which hardened tool steel and this was done by testing different coated cutting tools in different kinds of tool steels. The thesis work is performed at Uddeholms AB together with Uddeholms AB in the department of R&D at machinability cooperating with eifeler-Vacotec GmbH. The thesis work is going on from the end of January to the start of June and is a part of the education as mechanical engineer at Karlstad University and includes a total of 22,5 hp. The objective after finished thesis work is to be able to l

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8

Hunt, Richard David. "Structure-property relationships in spray formed 12CR D2 tool steel." Thesis, University of Sheffield, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444829.

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9

Ahmer, Zeeshan. "An investigation on thermomechanical behaviour of a tool steel X38CrMoV5." Paris, ENMP, 2011. http://www.theses.fr/2011ENMP0075.

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L'acier X38CrMoV5-47HRC est principalement utilisé dans les outillages de mise en forme à chaud. L'outil devrait comprendre haute résistance à la fatigue ainsi que la dureté élevée de défier les chocs thermiques et mécaniques. Surface de l'outil est principalement ruinés par le processus cyclique et progressive des conditions de température éphémère i. E. Fatigue non-isotherme. Les lois de comportement appropriées sont donc nécessaires pour prédire le comportement du matériau dans des conditions non-isothermes. Cette thèse représente une contribution à prédire le comportement mécanique de X38C

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10

Dessoly, Vincent. "Modeling and Verification of Cutting Tool Temperatures in Rotary Tool Turning of Hardened Steel." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5155.

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The chip formation process in machining is accompanied by heat generation. The heat generated influences both the workpiece physical properties as well as the cutting tool. High temperatures accelerate tool wear and thermal softening which are not desirable because they alter the accuracy of the machined surface and tool life. Many studies have been done to lower the heat generated in cutting. A first approach is to use a cutting fluid but its effectiveness is limited by its ability to penetrate between the tool and the chip. A second approach is to remove the heat generated through a cooling

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11

Galéa, Vincent. "Surface integrity and tool performance in the turning of hardened steel." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/17030.

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12

Saedon, Juri Bin. "Micromilling of hardened (62 HRC) AISI D2 cold work tool steel." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3390/.

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Investigations into micro-slot milling of high carbon, high chromium hardened AISI D2 cold work tool steel using 0.5mm diameter coated (TiAlN) tungsten carbide end mills were carried out. Performance was assessed in terms of tool life/tool wear, surface roughness, cutting forces, burr formation, slot geometry accuracy and workpiece surface integrity. The influence of operating parameters (cutting speed, feed rate and depth of cut) on tool life, surface roughness, burr width and cutting forces was evaluated using full factorial experiment design. Analysis of results included main effects plot a

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13

Persson, George. "Process development for H13 tool steel powder in binder jet process." Thesis, Högskolan i Gävle, Maskinteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32694.

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Additive manufacturing brings versatility and new degree of freedom for part design and manufacturing possibilities. Binder jetting is powder bed printing technique that does not require direct energy transfer rather binding powder metal particles through mechanical entanglement by use of the organic binder. The polymer chains in the solution hardens when heated thus creating a green part. Green parts are sintered in high temperature to adhere metal powder particles together creating a solid body. Binder jetting still developing to its full potential in scalability and material portfolio. This

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14

Lilly, Blaine W. "An investigation of pulsed electrochemical machining of H-13 tool steel /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487949150072426.

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15

Wang, Xihong. "Wear behavior of PVD titanium nitride-coated tool steels /." Full text open access at:, 1989. http://content.ohsu.edu/u?/etd,237.

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16

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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17

Eff, Michael. "The Effects of Tool Texture on Tool Wear in Friction Stir Welding of X-70 Steel." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1332509647.

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18

Michael, Eff. "The Effects of Tool Texture on Tool Wear in Friction Stir Welding of X-70 Steel." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1332459020.

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19

Mattsson, Amanda, and Malin Lindholm. "Friction and wear mechanisms of PCBN in sliding contact with tool steel." Thesis, Högskolan Dalarna, Materialteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:du-5663.

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20

Connors, Sean Thomas. "Laser engineered net shaping deposition of M2 tool steel with Niobium additions." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406710485.

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21

Luken, Raymond C. "Fracture behavior of CPM 10V." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/90974.

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The effect of three heat treatments on plane-strain fracture toughness (K <sub>Ic</sub>), fatigue crack growth rate (da/dN), and tensile behavior of a commercial powder metal alloy, CPM 10V, was investigated. Fracture toughness was increased by increasing the tempering temperatures and decreased by increasing the austenitizing temperature. These changes were related to changes in yield strength and the resulting crack tip plastic zone sizes. Fracture toughness resulting from any of the three heat treatments was inversely related to the hardness. Fatigue crack growth followed the Paris Law for

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22

Andersson, Axel. "Built-up edge formation in stainless steel milling." Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213993.

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Milling tests were performed in stainless steel to investigate the formation of built-up edge (BUE). Three variants of tests were conducted which were divided as high-, medium, and low temperature milling tests. These tests were run in the austenitic stainless steel SS2343. The medium temperature milling tests were run in duplex SS2343 and precipitation hardened CORRAX. BUE was found for all tests. With the exception of the high temperature milling tests, BUE was formed locally on the main cutting edge. When milling at higher temperature the BUE covered the entire edge. All inserts used, each

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23

Kartha, Aravind, and Shravan Subramanian. "Turning of tool steel : Study on the effect of insert grade and entering angle on tool life." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281530.

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PrimeTurning™ is a new turning technology, which consists of tools and programming method. By using this method, it has been demonstrated that higher material removal rates and flexibility in turning can be obtained. The New Product Industrialisation department at AB Sandvik Coromant works with development of production processes and improvements in current processes.Machining tests are carried out in order to improve production performance, and find optimised solutions. In this master thesis work, the effect of insert grades and entering angles on wear and tool life while machining hardened

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24

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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25

Sjöström, Johnny. "Chromium martensitic hot-work tool steels : damage, performance and microstructure." Doctoral thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap, fysik och matematik, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2553.

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Chromium martensitic hot-work tool steel (AISI H13) is commonly used as die material in hot forming techniques such as die casting, hot rolling, extrusion and hot forging. They are developed to endure the severe conditions by high mechanical properties attained by a complex microstructure. Even though the hot-work tool steel has been improved over the years by alloying and heat treatment, damages still occur. Thermal fatigue is believed to be one of the most common failure mechanisms in hot forming tools. In this thesis tools used in hot forging and die casting were examined to determine damag

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26

Ngoc, Anh Giang [Verfasser]. "Multi-scale Model for Fatigue in Carbide-rich Tool Steel / Giang Ngoc Anh." Aachen : Shaker, 2015. http://d-nb.info/1080763902/34.

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27

Miner, Woodrow D. "A Tool Wear Comparative Study in Turning Versus Computer Simulation in 1018 Steel." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd744.pdf.

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28

Blidberg, David, and Henrik Hagberg. "Dealer-Customer Interaction in the Tool Steel Industry : a Case Study of SSAB." Thesis, Linköping University, Department of Management and Economics, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2487.

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<p>This thesis is a description of the sales process for Toolox, the newest of four products produced by SSAB Oxelösund. Toolox is a tool steel, sold using eleven external dealers throughout Europe. Each dealer carries a wide range of steel grades for different uses. To increase sales volumes SSAB want to have the right support for their dealers. In this thesis the organizations and individuals who influence in the buying decision are identified as well as their buying behavior and the information that is needed in the sales situations. The requirements on the tool steel derive not only from t

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29

W, Lindvall Fredrik. "On tool steel, surface preparation, contact geometry and wear in sheet metal forming." Licentiate thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-8883.

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In sheet metal forming operations the life length of the production equipment islargely dependent on the wear of the tools that are in direct contact with the sheet.One form of adhesive wear where some sheet material gets transferred to the tool, alsoknown as galling, is the most common cause of tool failure. The transferred materialsticks firmly to the tool and will scratch subsequent sheets and increase friction, renderingthem anywhere from aesthetically unsightly to completely ripped apart. Withcareful combination of several parameters the tools production life can be significantlyextended.

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30

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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31

Nasuf, Gulfem Ipek. "Carbon nanotube growth on tool steel substrates by thermal chemical vapor deposition (CVD) /." Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1559857141&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Thesis (M.S.)--Southern Illinois University Carbondale, 2008.<br>"Department of Mechanical Engineering and Energy Processes." Includes bibliographical references (pages 117-119). Also available online.

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32

Shaikh, Vasim. "Mist and Microstructure Characterization in End Milling Aisi 1018 Steel Using Microlubrication." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc283858/.

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Flood cooling is primarily used to cool and lubricate the cutting tool and workpiece interface during a machining process. But the adverse health effects caused by the use of flood coolants are drawing manufacturers' attention to develop methods for controlling occupational exposure to cutting fluids. Microlubrication serves as an alternative to flood cooling by reducing the volume of cutting fluid used in the machining process. Microlubrication minimizes the exposure of metal working fluids to the machining operators leading to an economical, safer and healthy workplace environment. In this d

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33

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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34

Yang, Yu. "On-line inspection and thermal properties comparison for laser deposition process." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/Yang_09007dcc803bca12.pdf.

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Thesis (M.S.)--University of Missouri--Rolla, 2007.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed December 6, 2007) Includes bibliographical references.

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35

Ersvik, Erik, and Roj Khalid. "Milling in hardened steel - a study of tool wear in conventional- and dynamic milling." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-255646.

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Milling is a commonly used machining process where a rotating cutter removes material from the workpiece. In recent years, attention has been turned towards so called dynamic milling methods which differ from the conventional way of milling. Dynamic milling normally uses, as opposed to the conventional way, more of the axial cutting edge, smaller radial depth of cut, significantly higher cutting speed and feed per tooth. The method has demonstrated potential to save both time and money under specific circumstances, for manufacturing companies.This thesis was conducted at ISCAR Sverige AB in Up

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36

Su, Wei-Nien. "Layered fabrication of tool steel and functionally graded materials with a Nd:YAG pulsed laser." Thesis, Loughborough University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274985.

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37

Macêdo, Gabriel. "Material Transfer Mechanisms during Interaction of Aluminium Alloy and Tool Steel at Elevated Temperatures." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80118.

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Hot stamping of aluminium alloys allows for increased formability, decreased springback and the possibility of integrating age-hardening heat treatments into the process. However, it can be challenging due to the occurrence of material transfer of aluminium onto the tool, as aluminium is prone to adhesion even at low temperatures. Hence, lubrication is always necessary when forming aluminium, but lubricants can still fail, leading to direct interaction between tool and workpiece and thus material transfer. This phenomenon reduces the efficiency of the process, as interruptions are necessary fo

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38

Maru, Tejas. "Effects of Minimum Quantity Lubrication (Mql) on Tool Life in Drilling Aisi 1018 Steel." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc149638/.

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It has been reported that minimum quantity lubrication (MQL) provides better tool life compared to flood cooling under some drilling conditions. In this study, I evaluate the performance of uncoated HSS twist drill when machining AISI 1018 steel using a newly developed lubricant designed for MQL (EQO-Kut 718 by QualiChem Inc.). A randomized factorial design was used in the experiment. The results show that a tool life of 1110 holes with a corresponding flank wear of 0.058 mm was realized.

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39

Ånmark, Niclas. "Steel characteristics and their link to chip breaking and tool wear in metal cutting." Doctoral thesis, KTH, Tillämpad processmetallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187156.

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The vision of this thesis is to study how it is possible to obtain optimised workpieces during metal cutting processes in industry. Specifically, the work is aimed to increase the understanding between the steel characteristics and their link to the chip breaking and tool wear during metal cutting. The emphasis is on the influence of the cleanliness and the characteristics of non-metallic inclusions in the workpiece on the machinability of carburising steel grades. The machinability of a case hardening steel is improved by a M-treatment (additions of Ca). Also, the improved machinability of th

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40

Shi, Meirong. "Thermo-chemical tool wear in orthogonal diamond cutting steel and stainless steel." 2010. http://www.lib.ncsu.edu/resolver/1840.16/6000.

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41

Chiang, Kwo-An, and 江國安. "Laser Surface Modification of Tool Steel." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/71798449995024574758.

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博士<br>臺灣大學<br>機械工程學研究所<br>95<br>In this paper, the tool steels treated by laser surface modification was proposed. The influences of the modified coatings with different laser working parameters, including temperature distribution, micro-structure and mechanical properties by laser surface modification were investigated. There are a total of three topics discussed as following: 1.Laser transformation hardening of SK3 and SKD61 steel When the laser was focused on the steel, the temperature of the steel was raised. Due to the effect of superheating, the critical phase transformation temperature

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42

Tu, Wei-hung, and 杜威宏. "A Study of Vacuum Carburized Low Carbon Steel and JIS SKD61 Tool Steel." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/80506218883392020139.

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碩士<br>大同大學<br>材料工程學系(所)<br>99<br>The vacuum carburizing of JIS S15C low carbon steel, 4 kind of low alloy low carbon steels and JIS SKD61 hot work mold steels have been studied in a vacuum furnace under a 5 torr acetylene atmosphere. The low carbon steels were carburized at 950 ~ 1050℃ for 30 ~ 120 min, oil quenched from the carburizing temperature to 80℃ and then tempered at 180℃ for 60 min. JIS SKD61 steels were carburized at 1000℃for 30 ~ 60 min, gas quenched from the carburizing temperature and then tempered at 200 ~ 600℃ for 120 min. The microstructures, austenite grain size, X-ray, QDP,

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43

Steneholm, Karin. "The Effect of Ladle Treatment on Steel Cleanness in Tool Steels." Doctoral thesis, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187368.

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The aim of the present work was to get an overview of the steel cleanness in tool steel. Plant trial studies of three steel grades were done with different focuses. Firstly the change of the inclusion characteristics during the vacuum degassing in the ladle was looked upon. The top slag composition was altered and sampling was made before and after vacuum degassing and the results showed that the top slag composition has an effect on the inclusion composition. Thermodynamic calculations indicated that the oxygen activity for the steel/inclusion was twice as large as that of the steel/top slag

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44

Deo, Mandar. "A pattern allowance advisor tool for steel castings." 2005. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-949/index.html.

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簡志賢. "Minimum Quantity Lubricant Cutting of Tool Steel P20." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/92854513483827741453.

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碩士<br>大葉大學<br>機械工程研究所碩士在職專班<br>93<br>ABSTRACT Machining with cutting tools is an important manufacturing technology. Pollution arising from cutting fluid is more and more important an issue which manufacturers are forced to face nowadays. Well developed countries have many researches regarding this issue. On the other hand, there are still very few researches dealing with this field in taiwan. This dissertation investigates minimum quantity lubricant (mql) experimentally with the intention of offering taiwan factories a possible option in reducing the amount of cutting

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46

林永定. "The Study of Laser Heat Treatment for Tool Steel Tig Weldments with Maraging Steel Filler Metal." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/97423052504523585303.

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碩士<br>國立臺灣科技大學<br>工程技術研究所<br>80<br>The purpose of this thesis has been to study the thermal cycle of JIS SKD61 tool steel under different conditions of laser powers and travel speeds. The results of experiment indicate that the peak temperatureis approximately proportional to the laster proportional to the square root of laser travel speed. Also absorption of CO2 laser beam by JIS SKD 61 was calculated with the experiment data was 10%. 　　In this study, the laser heat treatment for the hard-band of tool steel steel weldment was also carried out in order to reduce the hardness. As a result, the

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47

HAN, LI-LONG, and 韓麗龍. "The study of fluidized bed nitriding for tool steel TIG weldments with maraging steel filler metal." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/12062645626464319360.

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48

Lin, Hung-Hsiung, and 林鴻熊. "Studies of tool wear for milling hardened steel SKD11." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/89413958693751823746.

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碩士<br>華梵大學<br>機電工程學系博碩專班<br>97<br>This paper was to investigate the effect of different tool geometries with rake angle and helical angle and different coatings of TiCN and TiAlN on tool wear under down milling and up milling of the hardened steel SKD11. The experiment results showed that when the down milling was employed to machine SKD11 steel, the resulting tool wear was smaller than that of up milling. This may be because the cutting temperature and the abrasive wear are lower. In addition, using the end mill with negative rake angle under the down milling showed a lower wear. The reason f

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49

Lin, Pei-Fen, and 林珮芬. "Study on the Prenitrided Tool Steel Coated with CrN." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/71354762639666135790.

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碩士<br>逢甲大學<br>材料科學研究所<br>85<br>Hard coating is one of those surface modification process chosen to improve the wear resistance of tool steel. It is usually applied on a quenched and tempered tool steels which may have abrupt hardness difference compared with hard coating layer. A duplex treatment is developed to attempt to combine pre-ion nitriding treatment with CrN hard coating process. Nitriding layer, that the hardness is closer to that of the hard coating, is expected to

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Hsu, Jyun-Wei, and 徐俊暐. "Heat Treatment and Surface Modification for Optical Tool Steel." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/n3pe59.

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碩士<br>國立臺北科技大學<br>材料科學與工程研究所<br>99<br>TiAlSiN is deposited on the ASSAB Stavax ESR (AISI 420) using Cathodic Arc Evaporation (CAE) process in current study. Deep cryogenic treatment (DCT) and cold temperature (CT) treatments are performed prior to conventional tempering treatments for comparison. The effects of different treatments are investigated by chemical analyses, wear test, hydrophilic property test, and corrosion polarization tests. The thickness of TiAlSiN is 2 μm. Results show that the deep cryogenic treatment affects the amount and shape of carbide. The tempering treatments then hav

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