Question: A steel is heated at about 875° C where the structure consists of entirely austenite. It is then cooled suddenly at a temperature of about 250° C to 525° C. This process of heat treatment is known as
[A].normalising
annealing
austempering
martempering
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.