零件的表面淬火大多采用高频、中频、火焰,激光或盐炉快速加热淬火法。但是,我厂现有设备满足不了大直径零件的表面淬火要求。例如:有一种直径450mm,高度 120mm,材料为 ZG310-570的滚轮。热处理技术要求滚轮外圆表面淬火,硬度40～45HRC,淬硬层深度>3mm。对于这样的要求,用 Surface hardening parts are mostly high frequency, intermediate frequency, flame, laser or salt furnace rapid heating quenching method. However, the existing equipment in our factory can not meet the surface quenching requirements of large diameter parts. For example: There is a diameter of 450mm, height 120mm, the material is ZG310-570 wheel. Heat treatment technology requires wheel cylindrical surface quenching, hardness 40 ~ 45HRC, hardened layer depth> 3mm. For such a request, use