Sökning: "cemented carbides"

Visar resultat 11 - 15 av 33 uppsatser innehållade orden cemented carbides.

  1. 11. Design of cemented carbide with Ni-based superalloy binder strengthened with y’-Ni3Al precipitates

    Master-uppsats, KTH/Materialvetenskap

    Författare :Oscar Edholm; [2018]
    Nyckelord :Cemented Carbide; Super alloy; Ni-alloy; Ni-Super alloy; Superalloy; Ni3Al; NiAl; Gamma Prime; Gamma; Precipitates; Ni3Al Precipitates; Master Alloy; Liquid Phase Sintering; Cementerad karbid; Hårdmetall; Superlegering; Ni-legering; Ni-Superlegering; Superalloy; Ni3Al; NiAl; Gamma Prim; Gamma; Precipitates; Ni3Al Precipitates; Mästerlegering; Utfällning;

    Sammanfattning : Replacement of cobalt in cemented carbides has gained in attention recently because threats of regulations due to health issues (cancerogenic effect), increased demand from the electric vehicle industry and the questionable extraction from countries like Democratic Republic of Congo. In this report the use of Ni-based binder as an alternative binder for cemented carbides has been explored. LÄS MER

  3. 12. Effect of carbon activity on microstructure evolution in WC-Ni cemented carbides

    Master-uppsats, KTH/Materialvetenskap

    Författare :Olivia Danielsson; [2018]
    Nyckelord :Cemented carbides; Hard metal; WC-Ni; Tungsten carbide; Nickel binder; Grain coarsening; Grain growth; Carbon activity; Size distribution; EBSD; Electron backscattered diffraction;

    Sammanfattning : The aim of this work was to systematically study how the microstructure evolution is affected by the carbon activity in WC-Ni cemented carbides. Seven WC-9.59at%Ni alloys with different carbon activity were sintered at 1500 °C. LÄS MER

  4. 13. 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

  5. 14. Wear and degradation of Co, Fe and Ni-based cemented carbides against sandstone and granite

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

    Författare :Felix Jacobson; [2018]
    Nyckelord :Cemented carbide; mining; drilling; granite; sandstone; mine water; wear; degradation; tribology; tribochemical; cobalt; nickel; iron;

    Sammanfattning : This diploma work is performed at Sandvik Mining and Rock Technology, Rock Tools division, a world-leading mining equipment manufacturer. The aim is to study the wear of cemented carbide rock drill inserts worn against granite and sandstone countersurfaces, with focus on the impact of binder phase composition and flushing agent chemistry. LÄS MER

  7. 15. Performance and Wear Behavior of Ultra-Hard Cutting Tools during Machining of Titanium Alloy

    Master-uppsats, Lunds universitet/Industriell Produktion

    Författare :Rebecka Lindvall; [2018]
    Nyckelord :Metal cutting; Machining performance; Titanium machining; Ti6Al4V; α β -alloy; Tool wear; Wear mechanisms; Cost efficiency; Colding analysis; Cemented carbide; PCD; pcBN; TEM; Technology and Engineering;

    Sammanfattning : Since the 1950’s, a wide range of titanium alloys has been developed. Attractive titanium properties are the high strength-to-weight ratio, resistance towards corrosion, low thermal conductivity and low thermal expansion. LÄS MER