Normalizing involves heating a material to an elevated temperature and then allowing it to cool back to room temperature by exposing it to room temperature air after it is heated. This heating and slow cooling alters the microstructure of the metal which in turn reduces its hardness and increases its ductility.
35) The process of heating steel to about 40 Degree Centigrade above the upper critical temperature and cooling it in still air to room temperature is known as
Answer is:
Normalizing
Explanation:
Related Heat Treatment MCQ with Answers
Answer is:
Induction hardening
Explanation:
Induction hardening is a process used for the surface hardening of steel and other alloy components. The parts to be heat treated are placed inside a water cooled copper coil and then heated above their transformation temperature by applying an alternating current to the coil.
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