Chemical heat treatment

1. Improving the wear resistance of parts

High carbon martensite hardening surface can be obtained by carburizing and quenching of steel parts, and diffusion hardening surface of alloy nitride can be obtained by nitriding of alloy steel parts. The surface hardness of steel parts obtained by these two methods can reach HRC58-62 and HV800-1200, respectively. Another way is to form anti-wear and anti-bonding film on the surface of steel parts to improve the friction conditions, which can also improve the wear resistance.low-temperature-vacuum-tempering-furnace

For example, the formation of Fe3O4 thin films on steam treated surfaces has anti-bonding effect, and the formation of Fe2SO4 thin films by surface vulcanization has both anti-wear and anti-bonding effects. In recent years, multi-element Co-penetration technology, such as oxygen-nitriding, sulphur-nitriding, carbon-nitrogen-sulphur-oxygen-boron five-element co-penetration, can form high hardness diffusion layer and anti-adhesion or anti-wear film at the same time, effectively improve the wear resistance of parts, especially the anti-adhesion and wear resistance.vacuum-heat-treatment-equipment-selection

2. Improving the Fatigue Strength of Parts

Carburizing, nitriding, soft nitriding and carbonitriding all can strengthen the surface of steel parts, while forming residual compressive stress on the surface of parts, effectively improving the fatigue strength of parts.vacuum-induction-furnace-manufacturer

3. Improving the Corrosion Resistance and High Temperature Oxidation Resistance of Parts

For example, nitriding can improve the atmospheric corrosion resistance of steel parts; after aluminizing, chromizing and siliconizing, dense and stable protective films of Al2O3, Cr2O3 and SiO 2 are formed by interaction with oxygen or corrosion medium, which can improve the corrosion resistance and high temperature oxidation resistance. Usually, the hardening of steel will bring about embrittlement at the same time. When the surface hardening method is used to improve the surface hardness, the core is still in a good toughness state, so it can better solve the contradiction between hardening and toughness of steel parts than the whole hardening method of parts. Chemical heat treatment makes the chemical composition and structure of steel surface change at the same time, so it is better than surface quenching and hardening methods such as high, medium frequency induction and flame quenching. If the infiltration elements are selected properly, a surface layer suitable for various performance requirements of parts can be obtained.vacuum-high-pressure-gas-quenching-furnace