A) Case hardening
B) Sherardizing
C) Annealing
D) Tempering
Correct Answer: A
Solution :
Case hardening: The process of hardening the surface of wrought iron by depositing a surface layer of steel on it is called case-hardening it is done by heating wrought iron in contact with potassium Ferro cyanide. Alternatively, case hardening can also be done by heating wrought iron with charcoal and then plunging it a suitable oil.You need to login to perform this action.
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