The surface heat treatment of Q355GNH weathering steel is a metal heat treatment process that changes the surface properties by heating and cooling the steel plate surface. So what do you know about the characteristics of surface heat treatment?
1. Hardness
The hardness of high-frequency induction surface heat treatment is 2HRC~3HRC higher than that of ordinary furnace.
2. Wear resistance
The surface heat treatment of
Q355GNH weathering steel is that the wear resistance and fatigue wear resistance under friction sliding wear conditions are higher than that of ordinary heat-treated parts, which is due to the fine martensite grains in the structure, the high carbide dispersion and the surface There is a comprehensive result of higher compressive stress.
3. Fatigue strength
Q355GNH weathering steel surface heat treatment can significantly improve the fatigue strength of the workpiece. For example, the semi-axle of automobile made of 45MnB steel, the original process is overall tempering, instead of tempering + surface heat treatment, life expectancy is increased by nearly 15 times. In addition, surface heat treatment reduces the notch sensitivity of parts. The surface heat treatment is carried out to improve the characteristics of the weather-resistant steel landscape wall, and is widely used in various industries at the same time, which are inseparable from its characteristics.
