9Cr18MoV马氏体不锈钢的感应淬火工艺

Induction hardening process of 9Cr18MoV martensitic stainless steel

直径为90 mm的9Cr18Mo V钢样品感应淬火试验结果表明,当感应设备输出功率一定时,增加工件移动速度,工件表面硬度降低,淬硬层深度减小;采用直径为96 mm感应器的间距是合适的间隙选择。回火试验结果表明,回火温度低于220℃时,表面硬度无影响;220-480℃之间,表面硬度略有下降;在520℃时会出现二次硬化的现象。

High frequency induction hardening test was carried out on 9Cr18MoV steel samples with a diameter of 90 mm. The results show that when the output power of the induction device is constant,all the hardness of workpiece surface and the depth of hardened layer decrease with increasing workpiece moving speed. The tempering test results show that the surface hardness does not change when the tempering temperature is below 220 ℃,but reduces slightly when the tempering temperature is between 220-480 ℃,and secondary hardening occurs when the temperature reaches 520 ℃.