What is the effect of Q345B steel plate surface treatment on its properties

The influence of Q345B steel plate surface treatment on its properties:
1. The surface quenching of Q345B steel plate is a heat treatment that only changes 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 Q345B steel plate to the quenching temperature rapidly, but when the heat hasn't been transmitted 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 Q345B steel plate have changed.
According to the different infiltration elements on the surface of Q345B steel plate, chemical heat treatment can be divided into carburizing, nitriding, carbonitriding, metallizing and other methods. It is very effective to improve the wear resistance, corrosion resistance and fatigue resistance of Q345B steel plate. At present, the development of chemical heat treatment is rapid, and the application of new technology is very much.