Sökning: "case hardening"

Visar resultat 1 - 5 av 47 avhandlingar innehållade orden case hardening.

  1. 1. Hardening Distortions of Serial Produced Gears

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Anders Olofsson; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hardening distortions; crown wheel; main shaft gear; gear runout; back-face tilt; macrosegregation; ingot casting; continuous casting; case hardening; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : Hardening distortions are unwanted changes in shape and dimension that arise during hardening of steel components. Uncontrolled distortions induce random errors to the manufacturing process, and have a strong negative impact on manufacturing costs. LÄS MER

  2. 2. Effects on Machinability due to Microstructure Variations in Case Hardening Steel

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Karin Björkeborn; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machinability; Short-term test; Microstructure; Pearlite Nodular Size; Case Hardening Steel; Chip breakability.;

    Sammanfattning : Typical products made of case hardening steel are transmission parts like gear wheels, pinions and crown wheels. Case hardening produces a carbon-rich surface and provides the parts with both enhanced hardness and fatigue life. LÄS MER

  3. 3. Effects of manufacturing chain on mechanical performance Study on heat treatment of powertrain components

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Johan Fahlkrans; KTH.; KTH.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Heat treatment; case hardening; carburising; induction hardening; gas quenching; tempering; straightening; fatigue strength; contact fatigue; fracture mechanics; Industriell ekonomi och organisation; Industrial Engineering and Management; Production Engineering; Industriell produktion; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : The increasing demands for lightweight designs with high strength call for improved manufacturing processes regarding heat treatment of steel. The manufacturing process has considerable potential to improve the mechanical performance and to obtain more reliable results with less variation. LÄS MER

  4. 4. Modeling Phase Transformations and Volume Changes during Cooling of Case Hardening Steels

    Detta är en avhandling från Stockholm : KTH

    Författare :Matilda Tehler; KTH.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phase transformation; volume changes; TECHNOLOGY Materials science Other materials science; TEKNIKVETENSKAP Teknisk materialvetenskap Övrig teknisk materialvetenskap;

    Sammanfattning : Case hardening distortions are a major problem for gear manufacturers. The aim of the current work is to create a simulation model, able to predict how and when case hardening distortions arise. The results presented in this thesis form a basis for such a model.Two case hardening steels, with base carbon contents of 0. LÄS MER

  5. 5. Modelling and simulation of plastic deformation on small scales interface conditions and size effects of thin films

    Detta är en avhandling från Stockholm : KTH

    Författare :Per Fredriksson; KTH.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strain gradient plasticity; Size effects; Thin films; Interface; Finite element method; Dislocations; Constitutive behaviour; Hardening behaviour; Indentation; Contact mechanics; Metal matrix composites; TECHNOLOGY Engineering mechanics; TEKNIKVETENSKAP Teknisk mekanik;

    Sammanfattning : Contrary to elastic deformation, plastic deformation of crystalline materials, such as metals, is size-dependent. Most commonly, this phenomenon is present but unnoticed, such as the effect of microstructural length scales. LÄS MER