After cryogenic treatment equipment, the relative wear resistance of the die is increased by 40%. After prolonged cryogenic treatment time, the relative wear resistance is increased under the condition that the hardness does not change much.
In the cryogenic treatment process, a large number of residual austenite is transformed into martensite. In particular, the suoversaturated metastable martensite will reduce sudesaturation during the process from -196℃ to room temperature, and precipitate dispersed ultra-fine carbides with a size of only 20 ~ 60A and a colattice relationship with the matrix, which can reduce the lattice distortion of martensite and reduce the microscopic stress, and fine dispersed carbonization In the plastic deformation of the material, the material can prevent the dislocation movement and strengthen the matrix structure.
At the same time, due to the precipitation of ultrafine carbide particles on the martensite matrix, the grain boundary catalysis is weakened, and the refining of the matrix structure not only reduces the degree of impurity segregation at the grain boundary, but also plays the role of grain boundary strengthening, so as to improve the performance of high speed steel, hardness, impact toughness and wear resistance are significantly increased. The mold hardness is high, its wear resistance is good, such as the hardness increased from 60HRC to 62 ~ 63HRC, the mold wear resistance increased by 30% ~ 40%.
Nuoruida (Tianjin) science and Technology Co., Ltd. is committed to research, development, and sales of liquid nitrogen freezer. Using European technology, we provide a variety of equipment. The main equipment is liquid nitrogen Cryogenic treatment equipment, cryogenic freezer, liquid nitrogen cabinet freezer, liquid nitrogen tunnel freezer,sub-zero processing equipment, low temperature cold assembly equipment, cryogenic freezing equipment, and so on.
After cryogenic treatment equipment, the relative wear resistance of the die is increased by 40%. After prolonged cryogenic treatment time, the relative wear resistance is increased under the condition that the hardness does not change much.
In the cryogenic treatment process, a large number of residual austenite is transformed into martensite. In particular, the suoversaturated metastable martensite will reduce sudesaturation during the process from -196℃ to room temperature, and precipitate dispersed ultra-fine carbides with a size of only 20 ~ 60A and a colattice relationship with the matrix, which can reduce the lattice distortion of martensite and reduce the microscopic stress, and fine dispersed carbonization In the plastic deformation of the material, the material can prevent the dislocation movement and strengthen the matrix structure.
At the same time, due to the precipitation of ultrafine carbide particles on the martensite matrix, the grain boundary catalysis is weakened, and the refining of the matrix structure not only reduces the degree of impurity segregation at the grain boundary, but also plays the role of grain boundary strengthening, so as to improve the performance of high speed steel, hardness, impact toughness and wear resistance are significantly increased. The mold hardness is high, its wear resistance is good, such as the hardness increased from 60HRC to 62 ~ 63HRC, the mold wear resistance increased by 30% ~ 40%.
