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: cryogenic
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
Application range of metal cryogenic treatment
Cryogenic treatment cabinet is mainly used in metal cryogenic treatment industry. Cryogenic treatment of metal is a new technique to improve the properties of materials by placing the micro-structure of the material. During cryogenic treatment, a large amount of residual austenite was converted to martensite. In particular, supersaturated metastable martensite decreases supersaturation from -150 degrees… Read more Application range of metal cryogenic treatment
Factors affecting the volume of retained austenite
From the composition, original structure to quenching and tempering process, many factors affect the content of retained austenite after quenching and tempering. Quenching cooling rate. Without non martensitic transformation, the slower the cooling rate is, the more the retained austenite content is. For example, the retained austenite content of GCr15 steel quenched at 850 ℃… Read more Factors affecting the volume of retained austenite