Chapter 12, Problem 12.79P

Interpretation Introduction

Interpretation:

The difference between entectoid and proeutectoid ferrite in hypoeutectoid steel needs to be explaind. The concentration of carbon in each needs to be determined.

Concept Introduction:

A eutectoid reaction known as a three-phase reaction by which upon cooling, a solid transforms in two another solid phases at a similar time. If the bottom of a single-phase solid field closes, it doen so with entectoid point.protectoid includes protectoid steel ,protectoid ferrite ,protectoid cementite.

Proeutectoid is a phase formed before the decomposition of eutectoid austenite.

In the relationship with primary solids, it is the first phase to from solid austenite.