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: industrial refrigerator
Cryogenic processing industrial refrigerator
The inner wall of low temperature box of industrial refrigerator is made of stainless steel, and the temperature is controlled by intelligent instrument. The system structure is simple, the parts are arranged compactly, and the operation is intuitive and simple. The cryogenic treatment equipment will continue the cooling process of quenched metal materials to achieve… Read more Cryogenic processing industrial refrigerator
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
Mechanism of cryogenic treatment
2) Mechanism of cryogenic treatment The quenching process of steel is the process of obtaining martensite, but quenching can not make all austenite in steel transform into quenching structure. After heat treatment of various steels, some austenite remains. The residual amount varies with the steel type and heating temperature, and there is a certain amount… Read more Mechanism of cryogenic treatment
Ultra low temperature treatment of D2 cold working die steel
After quenching D2 cold working die steel and then ultra-low temperature treatment in an industrial refrigerator at 196 ℃, the retained austenite can be eliminated and all martensite can be obtained, and the microstructure can be further refined. After ultra-low temperature treatment, the Rockwell hardness (HRC) of D2 steel is increased by 4 units, the… Read more Ultra low temperature treatment of D2 cold working die steel
Cryogenic treatment – Cryogenic Treatment of austenitic stainless steel for cryogenic valves
Most of Cr Ni austenitic stainless steels are in metastable state at room temperature, but martensitic transformation occurs in ultra-low temperature range due to lattice distortion. The temperature at which martensite begins to transform is the martensite transformation point (also known as transformation point), which is represented by the symbol Ms. The temperature of MS… Read more Cryogenic treatment – Cryogenic Treatment of austenitic stainless steel for cryogenic valves
Significance of cryogenic treatment of metals
Metal cold treatment is to use the industrial refrigerator to cool down the metal surface. The industrial refrigerator is not corrosive, but it is easy to make molecules irregularly arranged at low temperature, resulting in the decline of toughness and strength. Low temperature cold treatment is the cryogenic processing of various cutting tools, cutting tools,… Read more Significance of cryogenic treatment of metals
Wear resistance and ultra-low temperature treatment of props
Metal cutting is one of the most basic machining methods in mechanical manufacturing. With the development of modern science and technology, cutting is developing towards high efficiency and high quality. Therefore, how to improve the service life and working reliability of cutting tools and how to determine the durability of cutting tools have become prominent… Read more Wear resistance and ultra-low temperature treatment of props
Removing LCD with industrial refrigerator
At present, when the liquid crystal display screen is not well fitted, it is necessary to separate the glass panel of the liquid crystal display screen from the liquid crystal component. Most of the existing separation methods use the heating platform, and place one side of the glass panel of the liquid crystal display screen… Read more Removing LCD with industrial refrigerator
Cryogenic box automobile assembly machinery gear cold assembly industrial refrigerator
The interference fit problem of hole and shaft parts is often encountered in the process of mechanical equipment maintenance and assembly. However, due to the lack of conditions for the implementation of modern assembly technology, the interference assembly of hole and shaft parts by thermal expansion method is a commonly used technical means in actual… Read more Cryogenic box automobile assembly machinery gear cold assembly industrial refrigerator