Question

Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?

a.

Cobalt: It contributes to rerl hardness by hardening ferrite.

b.

Molybdenum: It forms abrasion resisting particles.

c.

Phosphorous: It improves machinability in free cutting steels.

d.

Silicon: It reduces oxidation resistance.

Answer: (a).Cobalt: It contributes to rerl hardness by hardening ferrite.

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Q. Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?

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