Cold treatment, also known as cold treatment, sub zero treatment and cryogenic treatment, is to continue cooling the steel parts quenched to room temperature at a temperature below MS, which is generally – 60 ~ – 190 ℃, so that the austenite transformation at room temperature has not completed transformation into martensite. The purpose of… Read more Basis of cold treatment process
Tag: Cold treatment
Cooling before cold treatment
In the research work from 1945 to 1946, the effect of cooling rate from 180 ℃ to 20 ℃ was studied. The research on the specimen with special shape shows that, in the above temperature range, what kind of cooling conditions will usually form cracks, and what kind of cooling conditions will not form cracks.… Read more Cooling before cold treatment
cold treatment schemes studied
The following conclusions can be drawn from the work done: 1. From all the cold treatment schemes studied, it is not found that the cutting performance of the tool has any significant improvement over that of the tool with normal hardening and three times of firing. 2. Under the following conditions, cold treatment can significantly… Read more cold treatment schemes studied
Significance of each stage of industrial cold treatment
1) Cooling stage The purpose of slow cooling is to completely eliminate the residual stress. In the process of quenching and tempering, the residual stress will be produced in the metal matrix. During the transformation of retained austenite to martensite, the volume expansion will also increase the residual stress. Only slow cooling can offset the… Read more Significance of each stage of industrial cold treatment
What is cryogenic treatment？
Since the 1920s and 1930s, with the rapid development of material science, the principle and technology of heat treatment are becoming more and more mature. It is difficult to improve the strength and toughness of metal by conventional heat treatment process, but in many cases, the strength and initial properties of existing materials, especially the… Read more What is cryogenic treatment？
Ultra low temperature cold treatment technology
Ultra low temperature cold treatment technology adopts single machine cascade refrigeration technology to provide refrigeration equipment. Committed to – 150 ℃ cryogenic box research, development, manufacturing, sales and other fields. Cryogenic technology is the most effective and economic high-tech to improve the performance of metal material workpiece. It is a new environmental protection technology with… Read more Ultra low temperature cold treatment technology
The wide use of cold shrink assembly technology for industrial refrigerators
The cold shrink assembly of industrial refrigerators is very common in industrial production and application, mainly because its use effect has been favored by users. Next, let’s have a deep understanding of the cold shrink assembly of industrial refrigerators. The cold shrink assembly of industrial refrigerator is mainly used in the industrial cold treatment. It… Read more The wide use of cold shrink assembly technology for industrial refrigerators
Cold treatment of retained austenite with industrial freezer
With the continuous development of the mechanical industry, the requirements for metal materials are becoming higher and higher. How to improve the mechanical properties and service life of metal workpieces under the premise of material and heat treatment process is becoming a problem that many people at the forefront of heat treatment industry think about… Read more Cold treatment of retained austenite with industrial freezer
Cold treatment of polymer materials for industrial freezers
With the continuous development of low temperature technology, the application of low temperature has penetrated into various fields of the national economy, including natural gas liquefaction, nuclear fusion, superconductivity, hydrogen energy utilization, aerospace, biomedical, food industry, etc. at the same time, the application of low temperature in the metal material industry and high-end machinery manufacturing… Read more Cold treatment of polymer materials for industrial freezers
Control method of retained austenite in industrial freezer cold treatment
There are always some retained austenite after quenching. Too much retained austenite is harmful to the service life and hardness of parts, which will cause the instability of soft spot and size. However, a proper amount of retained austenite can improve the fatigue strength of parts. We can control the quality and service life of… Read more Control method of retained austenite in industrial freezer cold treatment