How about the performance of medium frequency induction heating surface hardening?
1. Surface hardness: The surface hardness of workpieces that are surface-quenched by high- and medium-frequency induction heating is often 2 to 3 units (HRC) higher than ordinary quenching.
2. Wear resistance: The wear resistance of the workpiece after high frequency quenching is higher than that of ordinary quenching. This is mainly due to the combination of small martensite grains in the hardened layer, high carbide dispersion, high hardness, and high surface compressive stress.
3. Fatigue strength: high and medium frequency surface quenching greatly improves fatigue strength and reduces notch sensitivity. For the workpiece of the same material, the depth of the hardened layer is within a certain range. As the depth of the hardened layer increases, the fatigue strength increases, but when the depth of the hardened layer is too deep, the surface layer is compressive, so the fatigue strength decreases when the depth of the hardened layer increases. Increased brittleness. Generally, the depth of the hardened layer is δ=(10～20)%D. More appropriate, where D. Is the effective diameter of the workpiece
