Question

Which of the following is true?

(a) Rate of cooling in normalising is faster then in annealing

(b) Annealing improves ductility

(c) Normalising improves grain structure

(d) All of the mentioned

I was asked this question in my college exam.

This fundamental question comes from the Heat Treatment & Case Hardening of Steels in chapter Engineering Materials of Machine Design

Answer 1

Correct choice is (d) All of the mentioned

To put it plainly: In annealing, the furnace is switched off and component cools slowly. In normalising, component is air cooled.