What is the effect of surface treatment on performance of 42CrMo thick wall steel pipe

1.Surface hardening is a heat treatment that changes only the surface structure but not the chemical composition of the surface.

It can be realized by high frequency, medium frequency or power frequency current induction heating or by flame heating. Its common feature is to try to heat the surface of 42CrMo thick wall steel pipe to the quenching temperature rapidly, but when the heat hasn't been transferred to the center of the part, it will immediately cool down, so that the surface hardness is high, and the center still has high toughness.

2. Chemical treatment - the heat treatment method in which the chemical composition and structure of the surface layer of 42CrMo thick wall steel pipe have changed.

Chemical heat treatment can be divided into carburizing, nitriding, carbonitriding, metallizing and other methods according to the different infiltration elements on the surface of 42CrMo thick wall steel pipe. It is very effective to improve the wear resistance, corrosion resistance and fatigue resistance of 42CrMo thick wall steel pipe. At present, the development of chemical heat treatment is rapid, and the application of new technology is very popular.