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heat treatment processes for steel.
Metal heat treatment process can be divided into three categories, that is, the integral heat treatment, surface heat treatment and chemical heat treatment. According to different the heating medium, heating temperature and cooling method, each category can be divided into a number of different heat treatment processes. Using different heat treatment process, the same kind of metal can be obtained different organizations which have different performance. Steel is the most widely used industrial metal, and the microstructure of steel is the most complex, therefore there are many different kinds of heat treatment processes for steel.
Integral heat treatment is the metal heat treatment process, that heating the metal parts integrally, and then cooling at the appropriate speed and obtaining microstructure to change its integral mechanical properties.Integral heat treatment of steel roughly includes 4 basic processes, that is, annealing heat treatment, normalizing heat treatment, quenching heat treatment and tempering heat treatment.