Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________?
Correct answer: A. 90% tungsten carbide and 10% cobalt
- A. 90% tungsten carbide and 10% cobalt
- B. 70% aluminium oxide & 30% silica
- C. 30% nickel, 15% chromium & 55% tungsten
- D. 65% tungsten & 35% zirconium
Explanation
Cemented carbide cutting tools commonly contain about 90% tungsten carbide particles bonded with 10% cobalt, giving high hardness and wear resistance. The other compositions are not the standard tungsten-carbide tool composition.
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