In the process of heat treatment of steel what do you understand by: 1. Case hardening 2. Tempering 3. Normalizing – NABTEB QUESTION

1. Case Hardening is the process of making the outer part of a component to be hard while leaving the inner part soft.

2. Tempering: This is the process of making or reducing the hardness of a component to a tolerance or the require hardness.

3. Normalizing: This is the process of making or refining the internal structure of a distorted grain structure of any component i.e bringing a material back to its original structure after deformation by force.