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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"High speed steel"”.
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An investigation of the needle like structure in high speed steel
Thesis--Michigan State College of Agriculture and Applied Science, 1927
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Characterization of industrial high speed steel roll material and effect of annealing prior to heat treatment on the structure and properties
… in work roll technology was the development of High Speed Steel (HSS) work rolls during the 1990's. The HSS rolls utilise a variety of carbide forming elements to improve the wear resistance. The South African Roll Company (SARCO) is an established roll producer and the only one in South Africa …
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Some observations of the microscopic and physical changes resulting from heat-treatment and an investigation of the dilatometric & thermal changes resulting from heat-treatment of high speed steel
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science, 1933
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Laser surface treatment of materials with presence of carbides at the surface.
… Haynes 188 and Inconel 718 alloys, and high speed steel workpieces. Metallurgical and morphological changes in the laser treated layer are examined using Scanning Electron Microscopy, Energy Dispersive Spectroscopy, and X-ray Diffraction. A carbon film of about 50 thickness and …
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Investigation of M2 and anti-segregation process HSS flat broaching tools.
… cutting performance and tool life evaluation of high speed steel broach samples. The comparison has been done between conventional M2 and Anti-Segregation Process (ASP) ASP53 and ASP30 high speed steel broach samples. The ASP53 was a development material. The cutting performance was evaluated by …
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Comparative Analysis of the Machinability of Various Titanium Alloys
… alloys using a constant feed rate and cutting speed. The titanium alloys used include the reference alloy of Ti-6Al-4V, powder metallurgy titanium and additive manufactured titanium. The drill bits used include high speed steel drill bits, three flute carbide drill bits and coated carbide drill …
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Production of steel matrix composites by mechanical milling and spark plasma sintering
Hot work tool steels (HWTSs) are ferrous alloys for tooling application, particularly developed to meet high toughness and good hot hardness. Increasing hardness generally leads to a decrease in toughness, therefore metal matrix composite (MMC) coatings and functionally graded materials have been …
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Fundamental studies of the PVD technique.
… vapour contamination and gas flow regulation are highlighted and possible solutions suggested.The coating-substrate interface region is considered, and the merits of metallic interlayers and arc etching are compared. An interlayer achieves good adhesion only at an optimum thickness as confirmed in …
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Investigation into the effects of chromium cross-contamination in niobium sputter deposited coatings using a multi-target PVD system.
… on the physical properties of Nb coatings on M2 High Speed Steel (HSS) and 304 bright annealed stainless steel substrates.During this investigation coatings were co-sputter deposited using a main Nb target power of 8kW and Cr target voltages of 0-350V in increments of 25/50V, (the potential range …
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Deposition and characterisation of (Ti,Zr) based hard compound and multi-layer PVD films.
… interfaces when the cathode spot traversed from high vapour pressure to low vapour pressure materials. Analysis of the spot motion has led to the proposal of a simple model. Reactive unbalanced magnetron sputtering trials successfully produced a range of TiZrN, TiMoN and ZrMoN coatings of …
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Study of Titanium based Composite Coatings for Resistance against Molten Aluminium Soldering on H13 Tool Steel
… failure or mechanical wear. In the aluminium high pressure die casting industry, liquid aluminium is extremely reactive with the constituents of H13 die steel and has a tendency to form intermetallic layers. This chemical interaction results in sticking of molten metal to the die surface which …
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Optimization of drill geometry for orthopaedic surgery
… bone structure may therefore be described as a highly oriented fibre matrix with calcium salts cemented in place to provide rigidity. Bone tissue shows many levels of organisation, the most prominent of which is the lamellar structure resembling a laminated plywood-type matrix. As of necessity …