Sökning: "high-speed steels"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden high-speed steels.

  1. 1. Phase equilibria and thermodynamic properties of high-alloy tool steels : theoretical and experimental approach

    Författare :Johan Bratberg; John Ågren; Bengt Hallstedt; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermodynamic modelling; thermodynamic calculations; tool steels; high-speed steels; CALPHAD; Other materials science; Övrig teknisk materialvetenskap;

    Sammanfattning : The recent development of tool steels and high-speed steels has led to a significant increase in alloy additions, such as Co, Cr, Mo, N, V, and W. Knowledge about the phase relations in these multicomponent alloys, that is, the relative stability between different carbides or the solubility of different elements in the carbides and in the matrix phase, is essential for understanding the behaviour of these alloys in heat treatments. LÄS MER

  3. 2. Surface and Inner Deformation during Shape Rolling of High Speed Steels

    Författare :Kristina Nordén; Stefan Jonsson; Jan-Olov Perä; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metallurgical manufacturing engineering; Metallurgisk produktionsteknik;

    Sammanfattning : Shape rolling is a common manufacturing process used to produce long products i.e. bars and wire. One of the problems that might occur during rolling is defect formation leading to rejection of the finished product. LÄS MER

  4. 3. Wear mechanisms and tool life of high speed steels related to microstructure

    Författare :Staffan Söderberg; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  5. 4. Microstructures and properties of powder metallurgy high alloy steels

    Författare :Jinhua Wang; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phase constitution; SEM; HIPing; EDS; SIMS; microstructure; martensite; high speed steel; atomization; cooling rate; austenite; floating densitometry; stainless steel; carbide; ferrite; materials technology; pressing; compacting; powder metallugry; sintering; solidification; composition; DTA;

    Sammanfattning : .... LÄS MER

  7. 5. Mechanical properties and microstructure of laser sintered and starch consolidated iron-based powders

    Författare :Yu Wang; Jens Bergström; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Powder metallurgy; Laser sintering; Microstructure; Fatigue; Thermal fatigue; Wear; Starch consolidation; Rapid forming; Net shaping; Liquid phase sintering; Nitriding; High speed steels; Materials science; Teknisk materialvetenskap; Materialteknik; Materials Engineering;

    Sammanfattning : In powder metallurgy research field, Direct Metal Laser Sintering (DMLS) and Metal Powder Starch Consolidation (MPSC) are relatively new rapid forming techniques to fabricate complex and near net-shaped components. The working principles of DMLS are to melt and fuse metal powder layer by layer in computer controlled systems to pile up components like three dimensional printing. LÄS MER