After heat treatment, the hardness and mechanical properties of steel are greatly improved, but there are still the following problems after heat treatment: 1. Retained austenite. The proportion of austenite is about 10% – 20%. Because austenite is very unstable, it is easy to transform into martensite when subjected to external force or environmental temperature… Read more cryogenic and ultra cryogenic treatment process
Tag: heating process
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