Sökning: "cemented carbides"

Visar resultat 21 - 25 av 33 uppsatser innehållade orden cemented carbides.

1. 21. Investigation of the Cr solubility in the MC phase where M = Ti, Ta

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Strukturkemi; Uppsala universitet/Oorganisk kemi

   Författare :Anna Ehrenborg; [2016]
   Nyckelord :cubic carbides; Cr solubility;

   Sammanfattning : In this work the chromium solubility in MC, and M in Cr3C2 and Cr7C3 carbides in the Ti-Cr-C and Ta-Cr-C system have been examined experimentally. Special attention is given to the cubic MC phase due to its frequent use in industrial cemented carbides. LÄS MER

3. 22. WC grain size distribution during sintering of WC-Co cemented carbides

   Master-uppsats, Lunds universitet/Materialteknik

   Författare :Oscar Bjäreborn; [2016]
   Nyckelord :hardmetal; cemented carbides; WC; EBSD; grain size distribution; microstructure; coercivity; hardness; toughness; sintering; growth inhibition; Technology and Engineering;

   Sammanfattning : The grain growth of WC in WC-7%Co cemented carbides with Cr-addition was investigated for cemented carbides synthesized from four different raw materials varying in grain size. Cr additions were 4%of the Co binder phase. To investigate the effect of Cr on grain growth two of the raw materials were also synthesized without Cr-additions. LÄS MER

4. 23. Gradient formation in cemented carbides with 85Ni:15Fe-binder phase

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

   Författare :Niklas Larsson; [2015]
   Nyckelord :cemented carbide; alternative binderphase; sintering; gradient; hard metal;

   Sammanfattning : In today’s inserts used for metal cutting the binder phase consists of cobalt (Co).However, EU’s REACH programme and the U.S’s National Toxicity Programme(NTP) classified Co as toxic/carcinogenic. Therefore, there is a strong need toinvestigate alternative binder phases. LÄS MER

5. 24. Quality Management during Sintering of Cemented Carbides and Cermets

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Oorganisk kemi

   Författare :Josefin Sipola; [2015]
   Nyckelord :Sintering; Cemented Carbides; Cermets; Coercivity; weight-specific magnetic saturation; CoM;

   Sammanfattning : The magnetic properties, coercivity, Hc, and weight-specific magnetic saturation, CoM, are two important quality characteristics in cemented carbides and ceramic metals, cermets. These properties give information about grain size and binder phase content, and are influenced by the different stages in the sintering process. LÄS MER

7. 25. Alternative binder phases for WC cemented carbides

   Master-uppsats, KTH/Materialvetenskap

   Författare :Chunxin Liu; [2014]
   Nyckelord :Binder phase; cemented carbides; WC; Co;

   Sammanfattning : WC cemented carbides are composites consisting of WC and a binder phase. WC/Co is widely used as cutting tools due to its excellent combination of hardness and toughness. This thesis work was performed at the R&D department of Sandvik Coromant and aimed to find the alternative binder phase to substitute cobalt. LÄS MER