感应淬火是一种在摩擦条件下提高工作零件表面硬度和耐磨性的有效方法。获得优质淬硬层的重要条件是淬火前零件的金属基体组织均一性。高强度铸铁的铸态组织特点是很不均一的(“牛眼”状),对感应淬火后的组织、 Induction hardening is an effective method to improve the surface hardness and wear resistance of working parts under frictional conditions. An important condition for obtaining a high quality hardened layer is the homogeneity of the metal matrix of the part before quenching. High-strength cast iron as-cast microstructure is very heterogeneous (“bull’s eye” shape), the induction hardening of the tissue,