Low temperature quenching is a heat treatment process that strengthens the crystal structure of metals at temperatures below -150 ° C (-238 ° F). It is known that the low temperature treatment of certain materials can have a positive impact on three aspects:
1. Durability is more durable: low temperature quenching helps to promote the transformation of residual austenite in the heat-treated steel into harder martensite. This process will significantly reduce defects in the crystal structure of steel.
2. Improve abrasion resistance: Low-temperature quenching increases the precipitation of η-carbides. This fine carbide acts as a binder in the martensitic matrix and helps the martensitic steel resist wear and corrosion.
3.Relieve stress: All metals have residual stress. Residual stress is the force generated during the solidification of a metal from a liquid to a solid. These stresses will make the state susceptible to changes (often unfavorable). Low temperature quenching can reduce these defects by homogenizing the microstructure.