A chemical heat treatment process in which nitrogen atoms penetrate into the surface of a workpiece at a certain temperature and in a certain medium. Widely used in cast iron, carbon steel, alloy steel, stainless steel and titanium alloy. After nitriding, the hardness of the material surface can be significantly improved, which makes it have higher wear resistance and fatigue strength.
Corrosion resistance and flame resistance, etc. , commonly used in machine tools, such as screws, gears, molds and other workpieces. The disadvantage is that the infiltration layer is shallow and brittle. It is suitable for surface treatment of mechanical parts that need both wear resistance and corrosion resistance. It has been used in petroleum machinery, construction machinery, auto parts and other industries. The highest salt spray test of processed parts can reach 1200h, and it is also used in iron pots.
Extended data:
The use of nitriding pot is introduced as follows:
For hot working dies tempered at high temperature, such as high-speed steel or 4Cr4MoSiV(H 13) steel dies, comprehensive properties of high surface hardness, good wear resistance, good thermal shock resistance, good crack resistance and good toughness can be obtained. However, when there is only a diffusion layer structure, the anti-blocking, anti-deposition and anti-melting performance of the die is not good enough.
Due to the different use conditions and performance requirements of molds or mechanical parts, it is necessary to adjust the structure and performance of the surface layer during surface heat treatment. Vacuum nitriding is not only applied to tools and dies, but also has obvious effect on improving the performance of precision gears, mechanical parts and springs that require wear resistance and corrosion resistance. , and can deal with a wide range of materials.
People's Network-How to correctly use wok for cooking?
Baidu encyclopedia-nitriding