In the machining of machinery industry, steel generally needs heat treatment, and the allowance will be indicated in the process drawing for grinding and finishing. In the process of steel heat treatment, tempering is required to harden the steel parts, then heat them to a temperature below AC1, hold them for a certain time, and then cool them to room temperature. Common tempering processes include low temperature tempering, medium temperature tempering, high temperature tempering and multiple tempering. The purpose of tempering: it is mainly to eliminate the stress generated by steel parts during quenching, so that the steel parts have high hardness and wear resistance, as well as the required plasticity and toughness.
ken. tang@chengcg.com
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