Sökning: "Gjutjärn"

Visar resultat 6 - 10 av 25 uppsatser innehållade ordet Gjutjärn.

  1. 6. Relation Between the Material in Press Hardening Dies and Fully Martensitic Transformation : Sheet properties of thick 3D-sheets in small series production

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Jesper Christensson; [2020]
    Nyckelord :hot stamping; press hardening; material properties;

    Sammanfattning : This report evaluates the influence of the die material on the cooling rate and martensitic transformation of press hardened sheets. The goal was to increase the thicknesses of sheets that can form fully martensitic microstructure when press hardened. LÄS MER

  3. 7. Development of a Method to Measure Residual Stresses in Cast Components with Complex Geometries

    Master-uppsats, KTH/Materialvetenskap

    Författare :Yang Yang; [2020]
    Nyckelord :Residual Stresses; Cast Iron; Engine Components; XRD; Ultrasonic; Cutting;

    Sammanfattning : Cast iron, taking the advantages of the advanced castability forming components of complex geometries and favorable mechanical properties, is employed in engine components in truck industries. Compacted graphite iron (CGI) integrates both merits of lamellar graphite iron (LGI) and spheroidal graphite iron (SGI) such as good machinability and high thermal conductivity from LGI, high ultimate tensile strength (UTS), good fatigue resistance, high elastic modulus, and high ductility from SGI, thus is now becoming a competitive alternative of traditional LGI in cylinder blocks and heads. LÄS MER

  4. 8. Fallstudie om hur Gävle kommun kan minska sitt dricksvattensvinn

    Kandidat-uppsats, Högskolan i Gävle/Miljövetenskap

    Författare :Christoffer Eriksson; Dorothy Khorshed; [2019]
    Nyckelord :Drinking water; action plan; leakage; physical losses; commercial losses; Gävle municipality; Gästrike Vatten; Dricksvattensvinn; handlingsplan; odebiterat vatten; läckage; fysiska förluster; kommersiella förluster; Gävle kommun; Gästrike Vatten;

    Sammanfattning : To ensure sustainable development UN approved 17 sustainable development goals in the year of 2015, in which goal six specifies to ensure water and sanitation for all, and specified in goal six target indicator four, in a more effective way. To have an average of 24% in losses of the total amount of produced drinking water in Sweden is not effective, and Gävle municipality isn´t any better with their recorded drinking water wastage between 28-40% the last years. LÄS MER

  5. 9. High temperature corrosion in exhaust application for heavy-duty trucks

    Master-uppsats, KTH/Materialvetenskap

    Författare :Alice Moya; [2019]
    Nyckelord :high temperature corrosion; austenitic steel; cast iron; cast steel; oxidation; exhaust gas; engine; heavy-duty trucks;

    Sammanfattning : Increasing awareness of environmental protection has made both governments and the industry aim for lowering carbon dioxide emissions. For the transport industry this means increasing engine efficiency, replacing fossil fuels with bio-based fuels or full electrification. LÄS MER

  7. 10. 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