Cryogenic treatment of workpieces

2020-04-24 08:43:24

    Cryogenic treatment refers to a method that uses liquid nitrogen as the refrigerant to process the workpiece at a temperature lower than -130 ° C. Cryogenic treatment can significantly improve the toughness of the workpiece without reducing the strength and hardness of the workpiece. Cryogenic treatment methods are divided into liquid method and gas method. The liquid method is to put the workpiece directly into liquid nitrogen, the processing temperature is -150 ℃, the disadvantage is that the thermal shock is large, and sometimes even causes the workpiece to crack; the gas method is through the latent heat of vaporization of liquid nitrogen and low temperature nitrogen heat absorption refrigeration, processing temperature Up to -196 ℃, the treatment effect is better.

    Metal material heat treatment is a metal thermal processing process in order to obtain the required performance of the material.Through the means of heating, heat preservation and cooling, the chemical composition and organization of the surface or inside of the material are changed to improve the performance of the material, but sometimes the conventional heat treatment process Could not meet the requirements, then cryogenic treatment came into being. Cryogenic treatment of metal materials is a new process to improve the performance of metal materials.

    Cryogenic treatment technology uses liquid nitrogen as the cooling medium to continue the cooling process of the quenched metal material to a certain temperature far below room temperature. Cryogenic treatment can precipitate ultrafine carbides and improve the wear resistance of the workpiece. It can refine the grain and improve the impact toughness of the workpiece. Can change the Paralympic Games, improve the hardness and wear resistance of the workpiece, and stabilize the size of the workpiece. It can double the corrosion resistance of martensitic stainless steel and improve the polishing performance of the workpiece. It can improve the conductivity and corrosion resistance of non-ferrous metals. Can reduce mold deformation and cracking. Improve the dimensional accuracy of the workpiece.

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.