Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are ?
Correct answer: A. Cobalt, chromium & tungsten
- A. Cobalt, chromium & tungsten
- B. Cobalt, chromium & nickel
- C. Molybdenum, tungsten & chromium
- D. Cobalt, zirconium & molybdenum
Explanation
Stellite-type cast tool alloys are based mainly on cobalt with chromium and tungsten. Cobalt provides hot strength, while chromium and tungsten contribute hardness and wear resistance.
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