Annealing wrought steel above its critical temperature range will
| Annealing wrought steel above its critical temperature range will increase toughness of the steel because
A. it will relieve in the formation of spheroids in the matrix
B. it will result in the formation of spheroids in the matrix
C. it will bring about the refinement of a coarse grain size.
D. it will bring about the refinement of a fine grain size
Please scroll down to see the correct answer and solution guide.
Right Answer is: C
SOLUTION
Explanation:
- Full annealing consists of heating steel to a temperature above its critical range, holding if there for a sufficient period of time and slowly cooling it.
- Heat treatment of the steel to a temperature below the critical temperature will relieve internal stresses produced by rapid cooling or produce spheroids in a ferrite matrix.
- Annealing above the critical temperature will refine the coarse granular condition of the steel.