Question

Quenching increases hardness of steel.

• A. True
• B. False

Answer 1

The correct option is A True

In materials science, quenching is the rapid cooling of a workpiece to obtain certain material properties. A type of heat treating, quenching prevents undesired low-temperature processes, such as phase transformations, from occurring. It does this by reducing the window of time during which these undesired reactions are both thermodynamically favourable, and kinetically accessible; for instance, quenching can reduce the crystal grain size of both metallic and plastic materials, increasing their hardness.

Quench hardening is a mechanical process in which steel and cast iron alloys are strengthened and hardened.

Hence it is true.