合金铸铁和钢制凸轮轴一般采用中频淬火。感应加热表面淬火的原理是将凸轮轴

合金铸铁和钢制凸轮轴一般采用中频淬火。感应加热表面淬火的原理是将凸轮轴的凸轮放入加热线圈中。由于电流的趋肤效应，凸轮由外层向内侧加热，使表层一定深度的组织转变为奥氏体，然后迅速硬化。目前，480凸轮轴采用自然回火，凸轮表面组织为针状马氏体。<br>凸轮轴表面热处理可大大提高零件的扭、弯曲疲劳强度和耐磨性。感应淬火具有变形小、节能、成本低、劳动生产率高等优点。淬火机可放置在冷加工生产线上，便于生产管理。

合金铸铁和钢制凸轮轴一般采用中频淬火。 感应加热表面淬火的原理是将凸轮轴的凸轮放入加热线圈中。 由于电流的趋肤效应，凸轮由外层向内侧加热，使表层一定深度的组织转变为奥氏体，然后迅速硬化。 目前，480凸轮轴采用自然回火，凸轮表面组织为针状马氏体。<br>凸轮轴表面热处理可大大提高零件的扭、弯曲疲劳强度和耐磨性。 感应淬火具有变形小、节能、成本低、劳动生产率高等优点。 淬火机可放置在冷加工生产线上，便于生产管理。

Alloy cast iron and steel camshaft are generally quenched by medium frequency. The principle of induction heating surface quenching is to put the cam of camshaft into the heating coil. Due to the skin effect of electric current, the cam is heated from the outer layer to the inner side, so that the structure of a certain depth in the surface layer is transformed into austenite and then rapidly hardened. At present, 480 camshaft is tempered naturally, and the surface structure of cam is acicular martensite.<br>The surface heat treatment of camshaft can greatly improve the torsional and bending fatigue strength and wear resistance of the parts. Induction hardening has the advantages of small deformation, energy saving, low cost and high labor productivity. The quenching machine can be placed on the cold working production line, which is convenient for production management.<br>