近年来,我厂引进西德技术,对机床精度提出了更高的要求,根据西德图纸要求,液压滑台的滑座铸铁导轨六个面均需经过表面淬火处理,硬度需达到HRC45～50。据了解,西德普遍采用火焰淬火,淬硬层深达2mm以上。国内机床行业近年来曾采用高频淬火,但导轨面积较小,而且淬硬层深浅(0.8～1.5mm),变形较大,不能达到西德图纸要求。 In recent years, our factory introduced West Germany technology, put forward higher requirements on the machine precision. According to the requirements of the West Germany drawings, the six surfaces of the cast iron guide rail of the hydraulic sliding table are subjected to surface hardening treatment and the hardness needs to reach HRC45 ~ 50 . It is understood that West Germany commonly used flame hardening, hardened layer depth of 2mm or more. In recent years, the domestic machine tool industry has used high-frequency quenching, but the rail area is smaller, and hardened layer depth (0.8 ~ 1.5mm), large deformation, can not meet the requirements of the West German drawings.