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Hardening
Hardening is a metallurgical process used to increase the hardness of a metal. Hardness is a material's resistance to permanent deformation, such as bending, scratching, or denting. Metals are hardened by manipulating their internal crystalline structure through heat treatment processes.
There are several different metal hardening techniques, but they all involve the following general step.
- Heating the metal
- Rapid cooling
Tempering (optional)
MoreAnnealing
Annealing is a process used to change the properties of materials, most commonly metals. It involves heating the material to a specific temperature and then cooling it down in a controlled way. This process alters the internal structure of the material, making it softer and more workable crystalline structure through heat treatment processes.
There are a few reasons why annealing is done.
Softening a material.
Improving machinability.
Stress relief.
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