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
Tag: rapid cooling
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
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