Topic 10 - Heat Treatment of Steel Steels can be heat...

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Heat Treatment of Steel Steels can be heat treated to produce a great variety of microstructures and properties. Generally, heat treatment uses phase transformation during heating and cooling to change a microstructure in a solid state. In heat treatment, the processing is most often entirely thermal and modifies only structure. Thermomechanical treatments, which modify component shape and structure, and thermochemical treatments which modify surface chemistry and structure, are also important processing approaches which fall into the domain of heat treatment. The iron-carbon diagram is the base of heat treatment. Typical heat treatment operation is presented in Fig. 1. Fig. 1. Thermal history of heat treatment operation.
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According to cooling rate we can distinguish two main heat treatment operations: annealing – upon slow cooling rate (in air or with a furnace) quenching – upon fast cooling (in oil or in water) annealing - produces equilibrium structures according to the Fe-Fe
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Topic 10 - Heat Treatment of Steel Steels can be heat...

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