Difference between hot working and cold working and warm working
Answers
Answer:
Hot-working is the process of metal deformation that occurs above the temperature of recrystallisation and is called a hot working process.
Cold working is the process of metalworking in which the shape of metal is produced below the temperature of recrystallization, normally the ambient temperature is required for this process
Warm working is also a process of metal forming that occurs above the cold working temperature range and below the temperature of recrystallization of metal.
Explanation:
Hot-working
In this process, residual stress is not occurring in the metal.
It is used to refine the metal grains.
There is no metal hardening taking place.
Elongation and impact strength like mechanical properties are improved by this process
The poor surface is produced due to scaling and oxidation.
Cold working
Residual stress is produced in the metal in this process
Grains distortion occurs in this process
In this hardening of metal occur.
Elongation and impact strength is decreased.
In this process, a good surface finish is produced.
Warm working
In this process, less force is required for the operation
Higher metal ductility
Strain hardening is less
The requirement of heat energy is less
Produces good surface finish.
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