Sökning: "case-hardening"

Visar resultat 6 - 10 av 10 uppsatser innehållade ordet case-hardening.

  1. 6. Evaluation of material properties after laser welding on ductile cast iron

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Olivia Taivalkoski; [2019]
    Nyckelord :Laser welding; ductile cast iron;

    Sammanfattning : Scania wants to lower the weight of their trucks, including the goal to reduce the carbon dioxide emissions, and one way to do that is to use laser welding instead of fastenings.This bachelor thesis work is about laser welding of ductile cast iron, or spheroidal graphite cast iron or nodular cast iron, to QT-steels and case hardening steel and evaluation of the mechanical properties of the weld. LÄS MER

  3. 7. Optimization of case-hardening depth for small gears

    Master-uppsats, KTH/Hållfasthetslära (Avd.)

    Författare :Johannes Nyman; [2019]
    Nyckelord :;

    Sammanfattning : The optimization of case hardening depth for small gears was investigated with the use of Abaqus and the subroutine DANTE to simulate the formation of the microstructural phases, resulting in residual stresses and increased hardness. This was done with a step wise increment of the carburizing time, resulting in a theoretical maximum for compressive residual stresses at the surface. LÄS MER

  4. 8. Prediction of Variation from Heat Treatment

    Master-uppsats, KTH/Industriell produktion

    Författare :Vipasha Laijawala; Zhu Xiaomeng; [2018]
    Nyckelord :;

    Sammanfattning : This study is carried out at Scania’s production centre in Södertälje. The heat treatment process fora crown wheel is subject to a significant amount of parameters which are complex to model. LÄS MER

  5. 9. CORROSION-FATIGUE TESTING ON STEEL GRADES WITH DIFFERENT HEAT AND SURFACE TREATMENTS USED IN ROCK-DRILLING APPLICATIONS

    Master-uppsats, KTH/Materialvetenskap

    Författare :Luis Miguel Béjar; [2016]
    Nyckelord :corrosion fatigue; crack; rotating-bending; S-N curve; staircase method; fatigue strength; shot peening; case hardening; through hardening; fatigue; corrosion; rock drill; atlas copco; steel;

    Sammanfattning : Corrosion fatigue is a common failure mechanism in rock drilling components and many othermechanical parts subjected to cyclic loads in corrosive environments. A crucial part in the design ofsuch components resides in the selection of the right materials for the application, which ideallyinvolves testing and comparison of their performance under working conditions. LÄS MER

  7. 10. Hydrogen uptake during Carburizing and Effusion of Hydrogen at Room Temperature and during Tempering

    Master-uppsats, KTH/Materialvetenskap

    Författare :Maryam Khodahami; [2013]
    Nyckelord :hydrogen; case hardening; gas carburizing; tempering; hydrogen embrittlement; hydrogen diffusion;

    Sammanfattning : The carburizing atmosphere during the case hardening process contains a large proportion of hydrogen. Due to the rapid diffusion of hydrogen a high amount of hydrogen can be absorbed by the carburizing component. The amount of absorbed hydrogen is dependent on some factors such as for example the carburizing time and component dimensions. LÄS MER