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Question

Quenching increases hardness of steel.

A
True
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B
False
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Solution

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.

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