Sökning: "cemented carbides"

Visar resultat 1 - 5 av 25 uppsatser innehållade orden cemented carbides.

1. 1. The Effect of Cooling Rate on Sintered Cemented Carbides

   Master-uppsats, KTH/Materialvetenskap

   Författare :Lina Berglund; [2020]
   Nyckelord :Sintering; Cooling rate; Cemented Carbide; Sintering; Coercivity; Contiguity; Sintring; Kylhastighet; Hårdmetaller; Koercivitet; Kontiguitet;

   Sammanfattning : Magnetic measurements are useful tools for quality control of cemented carbides. Previous work at Sandvik Mining and Rock Technology has shown that the coercivity increases with increased cooling rate during sintering for a specific grade. LÄS MER

3. 2. Binder Migration in Double Pressed Drill Bit Inserts

   Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

   Författare :Axel Bjerke; [2018]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : It is possible to produce functionally graded cemented carbides on a large scale by double pressing. Being able to predict the binder migration in WC-Co cemented carbides during the sintering is essential to the design of such cemented carbides. The cobalt content is one of the main factors determining the hardness gradient. LÄS MER

4. 3. 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

5. 4. 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

7. 5. 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