Ball performance after induction surface hardening

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Surface hardness: high, medium frequency induction heating the surface hardening of the workpiece, the surface hardness is often 2 to 3 units (HRC) than ordinary quenching.
Abrasion resistance: induction harde ning of the workpiece abrasion resistance than ordinary quenching higher. This is mainly due to the fine grain size of the hardened layer of martensite, the carbide dispersion is high, and a relatively high hardness, the surface of the high compressive stress and other comprehensive results.double row angular bearing
Fatigue strength: high, intermediate frequency surface hardening greatly improve the fatigue strength, notch sensitivity decreased. Of the same material as the workpiece, the depth of the hardened layer within a certain range, with the depth of the hardened layer increases the fatigue strength increases, but the depth of the hardened layer is too deep when the surface is compressive stress, and thus the depth of the hardened layer additional fight fatigue strength but decreased, and the workpiece increased brittleness. Usually hardening layer depth δ = (10 ~ 20)% D. More appropriate, where D is the effective diameter of the workpiece.china roller bearing
4. Chemical heat treatment
Cementite: carburizing process directs the carbon atoms into the steel surface layer. Also the low carbon steel workpiece having a surface layer of high-carbon steel, and then having a high hardness and wear resistance after quenching and tempering, so that a surface layer of the workpiece, while the central portion of the workpiece still maintain the toughness of the low carbon steel, and plasticity.high speed bearing