Why do we heat materials to 850 degree C for 30 minutes What

Why do we heat materials to 850 degree C for 30 minutes?

What is the importance of annealing for cold work?

Solution

the mechanical properties vary depending upon the various heat treatment processes. Hence depending upon the properties and applications required we should go for a suitable heat treatment processes. When ductility is the only criteria tempering at high temperature for 30min

IMPORTANCE OF ANNELING FOR COLD WORKING

Metals are cold worked in order to change their shape. A material loses ductility when it is cold worked or moreover, cold rolled. If one wishes to partially or fully restore a cold worked material to its original properties, one can anneal the material. Annealing is performed by heating a material; in this instance, the material is a metal. There are three stages of annealing and each stage produces different results. The three stages of annealing are recovery, recrystallization, and grain growth.