Research on the properties of cryogenic treatment equipment for high-speed steel

2020-04-21 09:13:43

After the cryogenic treatment equipment, the relative wear resistance of the mold is increased by 40%. After extending the cryogenic treatment time, the relative wear resistance is increased without much change in hardness.

During the cryogenic treatment process, a large amount of residual austenite is transformed into martensite, especially supersaturated metastable martensite will reduce the supersaturation from -196 ℃ to room temperature, the precipitation is dispersed, the size is only 20 ～ 60A ultrafine carbides that maintain a coherent relationship with the matrix can reduce martensite lattice distortion and reduce microscopic stress, while finely dispersed carbides can hinder the movement of dislocations during plastic deformation of the material, thereby strengthening the matrix organization.

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 both reduces the degree of segregation of impurity elements at the grain boundary and exerts grain boundary strengthening. Function, 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 is also good. For example, if the hardness is increased from 60HRC to 62 ～ 63HRC, the wear resistance of the mold is increased by Nuoruida (Tianjin) science and Technology Co., Ltd. is committed to research, development, and sales of liquid nitrogen cryogenic equipment. Using European technology, we provide a variety of equipment. The main equipment is liquid nitrogen equipment, cryogenic furnace, cryogenic processing equipment, low temperature assembly equipment, cryogenic assembly equipment, and so on.

30% -40%.


Nuoruida (Tianjin) science and Technology Co., Ltd. is committed to research, development, and sales of liquid nitrogen cryogenic equipment. Using European technology, we provide a variety of equipment. The main equipment is liquid nitrogen equipment, cryogenic furnace, cryogenic processing equipment, low temperature assembly equipment, cryogenic assembly equipment, and so on.