Heat treating (or heat treatment) is a group of industrial, thermal, and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. Heat treatment techniques include annealing, case hardening, precipitation strengthening, tempering, carburizing, normalizing, and quenching.
The parameters depend on the heat treatment method, type of metal, and needed part size. Over the course of this process, the metal’s properties will change. Among those properties are electrical resistance, magnetism, hardness, toughness, ductility, brittleness, and corrosion resistance.
In other simplistic terms, heat treatment is the process of heating the metal, holding it at that temperature, and then cooling it back. During the whole process, the metal will undergo changes in its mechanical properties because of the high temperature, which alters the microstructure of the metal.
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