Thermal improvement

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Thermal improvement - Heat treatment involving the combination of hardening and high tempering. Applied to responsible steel products that are subjected to machining, such as ship and car shafts, crankshafts, parts of machine guns, etc.

Thermal improvement leads to:

Thermal improvement is given to medium carbon steels with adequate high hardenability, usually containing a Cr, Mo, Ni alloy addition. The properties of steel after thermal improvement result from the microstructure. Heat-treated steel is characterized by a sorbitol structure.

High tempering of steel is carried out at a temperature of approx. 500 ° C. The specific values ​​of the tempering temperatures used depend on the specific type of steel found in the standards. Incorrectly conducted tempering can lead to so-called the tempering tempering of the second type.

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