Sökning: "WC-Co"

Visar resultat 6 - 10 av 24 uppsatser innehållade ordet WC-Co.

  1. 6. Exploratory study of the interactions between textured alumina coatings and steel

    Master-uppsats, KTH/Materialvetenskap

    Författare :Jonas Svantesson; [2018]
    Nyckelord :alpha Al2O3; diffusion couple; chemical wear; crater wear; DICTRA;

    Sammanfattning : The crater wear of alumina coated WC-Co cutting tools is thought to be influenced by the chemical reactions between the coating and the workpiece material. Three different crystal orientations ((001), (012), and (100) of alpha alumina CVD coatings are examined in combination with four workpiece materials of steel to establish what reactions are present, and the extent of diffusion. LÄS MER

  3. 7. Mechanical properties of bulk alloys and cemented carbides

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Alexander Engman; [2018]
    Nyckelord :ICME; Cemented carbides; Cobalt;

    Sammanfattning : The usage of cobalt (Co) as binder phase material in cemented carbides has been questioned becauseof the potential health hazards associated with cobalt particle inhalation. Cobalt is used because ofits excellent adhesive and wetting properties, combined with adequate mechanical properties. LÄS MER

  4. 8. Microstructure investigations of WC-Co cemented carbide containing Eta-phase and Cr

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad materialvetenskap

    Författare :Sofia Tran; [2018]
    Nyckelord :Cemented carbide; Eta-phase; Chromium; Material characterization;

    Sammanfattning : Cemented carbide containing sub carbide phases, M6C and M12C, known as eta-phase, increases the lifetime milling cutters due to increased resistance to comb cracks. When milling, the inserts much sustain high temperatures, meaning edgeline toughness and thermal fatigue resistance are needed. LÄS MER

  5. 9. Simulation of fatigue crack growth in coated cemented carbide milling inserts

    Master-uppsats, KTH/Hållfasthetslära (Avd.)

    Författare :André Tengstrand; [2017]
    Nyckelord :;

    Sammanfattning : The aim of this work is to create a nite element model that simulates fatigue crack growth in coated cemented carbide milling inserts. A typical fatigue wear of coated milling tools are comb crack formation on the cutting edges of the tool inserts. Comb cracks initiate from pre-existent cooling cracks in the coating layers. LÄS MER

  7. 10. Tribological testing of top hammer drill buttons

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad materialvetenskap

    Författare :Carl Johan Hassila Karlsson; [2016]
    Nyckelord :tribology; wear; cemented carbides; WC-Co; sandstone; granite; rock drilling; top hammer drilling; wear test; friction;

    Sammanfattning : In the present work further modifications are implemented to an existing test setup for the evaluation of the wear of cemented carbide drill buttons in rock drilling applications. The test setup has been evaluated in previous diploma works, which has shown that the test successfully mimics the wear seen in rock drilling applications. LÄS MER