绍兴上门兼职-绍兴上门兼职_第1页

在常州酒店晚上怎么叫服务

Current location: home page > Technical articles >Features of cryogenic treatment equipment

Characteristics of cryogenic treatment equipment

Time: 2019-10-11 10:24 Source: unknown Author: Bander liquid nitrogen tank Click: second
Cryogenic treatment equipment is a post heat treatment process which can transform the soft retained austenite into high strength martensite and reduce the surface porosity and surface roughness. After the process is completed, the strength, wear resistance, toughness and other properties of the whole metal can be increased, not only the surface After several renovations, the die and tool still have high wear resistance and high strength, and the service life is doubled. However, the life of knife and shear products without cryogenic treatment will be significantly reduced after renovation. Cryogenic treatment can not only be applied to knife and shear products, but also can be applied to the mold for making knife and shear products, which can also significantly improve the die life. Self pressurized liquid nitrogen tank
* the commonly used cryogenic treatment equipment adopts liquid nitrogen refrigeration, which is economical and convenient. Generally, liquid nitrogen cryogenic tank is used to store liquid nitrogen. Many scholars and manufacturers at home and abroad have developed a variety of liquid nitrogen cryogenic equipment for gas refrigeration. Among them, Tianjin Institute of heat treatment developed a cryogenic box with liquid nitrogen vaporization developed in 1989. The temperature range is from normal temperature to - 180 ℃, and the consumption of liquid nitrogen is 0.7 kg liquid nitrogen per kilogram of workpiece. The nested cryogenic equipment developed by Huazhong University of science and technology in 1993 adopts double cooling mode, that is, the outer tank is mechanically cooled to - 18 ~ - 24 ℃, the inner tank is cooled to - 150 ℃ by liquid nitrogen, and the temperature deviation is within 3 ℃. The deep well type cold treatment device developed by the experimental center of low temperature technology of Chinese Academy of Sciences in 1996, * the low working temperature is - 100 ℃, the temperature deviation is within 2 ℃, the rising and cooling rates are 5 ~ 40 ℃ / h, which can be adjusted and controlled automatically. Self pressurized liquid nitrogen tank

Related contents

shrink
  • Telephone consultation

  • 010-80204245
  • Wechat consulting