On 2018-08-08 14:48:54
Heat treatment and cold treatment process
Operation method: cool the quenched steel pieces in low temperature medium (such as dry ice and liquid nitrogen) to - 60 ~ - 80 ℃ or lower, and take out the uniform temperature to room temperature after the temperature is uniform.
The remaining austenite in the quenched steel is transformed into martensite, and then the hardness, strength, wear resistance and fatigue limit of the steel are improved;
The arrangement of stabilizing steel to stabilize the shape and dimension of steel parts.
(1) After quenching, the steel parts should be cooled immediately, and then tempered at low temperature to eliminate the internal stress during low temperature cooling;
(2) Cold treatment is mainly applicable to tight cutting tools, measuring tools and tight parts made of alloy steel.