Liquid nitrogen cryogenic treatment machine

After cryogenic treatment, the relative abrasion resistance of the mold is increased by 40%. After prolonging the cryogenic treatment time, the relative abrasion resistance increased under the condition that the hardness did not change too much.

During the cryogenic treatment process, a large amount of residual austenite is transformed into martensite, especially supersaturated metastable martensite will reduce the supersaturation during in the process from -196℃ to room temperature, the dispersion,ultrafine carbide with a size of 20～60A and a coherent relationship with the substrate was precipitated, the distortion of martensite lattice can be reduced, and the microscopic stress can be reduced, while the tiny dispersed carbide can hinder the dislocation movement during the plastic deformation of the material, thereby strengthening the matrix structure.　

At the same time, due to the precipitation of ultrafine carbide particles, they are evenly distributed on the martensite matrix, which weakens the catalytic effect of the grain boundary, and the refinement of the matrix structure not only reduces the degree of segregation of impurity elements at the grain boundary, but also exerts the strengthening effect of the grain boundary, thereby improving the performance of high-speed steel, so that the hardness, impact toughness and wear resistance are significantly improved. The hardness of the mold is high, and its wear resistance will also be good.If the hardness is increased from 60HRC to 62～63HRC, the wear resistance of the mold is increased by 30% ~ 40%.

In addition to the above specifications, we can also customize various non-standard machine type according to customers' requirements. Our products are constantly updated, if there is a product improvement, you can log in to our company's website or call for consultation at any time!