Cryogenic treatment cabinet is mainly used in metal cryogenic treatment industry. Cryogenic treatment of metal is a new technique to improve the properties of materials by placing the micro-structure of the material.
During cryogenic treatment, a large amount of residual austenite was converted to martensite. In particular, supersaturated metastable martensite decreases supersaturation from -150 degrees to room temperature. At the same time, the ultrafine carbide with the size of only 20-60A and the coherent relation with the matrix was precipitated. In this way, the lattice distortion and microscopic stress of martensite can be reduced. The fine dispersed carbides can prevent dislocation movement during plastic deformation, thus strengthening the matrix structure. At the same time, the grain boundary catalysis is weakened because the superfine carbide grains are evenly distributed on the martensite matrix. The refinement of matrix structure not only reduces the degree of partial poly of impurity elements in grain boundary, but also plays a role of grain boundary strengthening, so as to improve the performance of high-speed steel, so that the hardness, impact toughness and wear resistance are significantly increased.
The experimental results show that the residual austenite in steel can be reduced by cryogenic treatment. Therefore, after quenching and tempering, cryogenic treatment can reduce the residual austenite volume of high-speed steel. Due to the precipitation of residual austenite to martensite and superfine carbide, hardness, wear resistance, impact toughness and red hardness are improved. As a new technology, cryogenic treatment is applied in heat treatment of high speed die steel, which can significantly improve the service life of the die and has great practical value.
Products include vertical, horizontal and other types, can be designed according to use requirements, in order to deal with various specifications of the workpiece. Now it covers the cold treatment of automobile parts, roller manufacturing, low-temperature assembly, machinery, bearing manufacturing, industrial mold manufacturing, tool manufacturing, hard alloy, power metallurgy and many other industries.