The process that increases the hardness of the outer surfaces of steel while leaving the core relatively soft is called ______.
A)heat treating
B)carburizing
C)anodizing
D)electrolysis

Question

Quizplus · Accepted Answer

Carburizing is a heat treatment process in which iron or steel absorbs carbon while the metal is heated in the presence of a carbon-bearing material, such as charcoal or carbon monoxide. This process increases the hardness of the outer surface of the steel while leaving the core less hard, which is beneficial for parts that need a hard surface to resist wear but require a tough, ductile core to resist impact.

The Process That Increases the Hardness of the Outer Surfaces