高频表面淬火是感应加热表面淬火的一种,常用频率为60～70kHz及200～300kHz,功率为30～100kW,是电子管式高频发生装置。钢件硬化层深度一般为1～2mm,加热速度可达1000℃/s。冷却方式为水冷或油冷。 其工作原理为:感应线圈通过交变电流时,产生交变磁场,使位于磁场内的工件产生同一频率的感应电势,从而在工件中产生涡流,达到很大值,并且聚集在小范围内,引起热效应,将工件加热到临界点以 High-frequency surface hardening induction hardening is a kind of surface hardening, the commonly used frequency of 60 ~ 70kHz and 200 ~ 300kHz, power of 30 ~ 100kW, is a tube-type high-frequency devices. Steel hardened layer depth is generally 1 ~ 2mm, the heating rate of up to 1000 ℃ / s. Cooling method is water-cooled or oil-cooled. Its working principle is as follows: When the induction coil passes the alternating current, an alternating magnetic field is generated, so that the workpiece located in the magnetic field generates an induction potential of the same frequency, thereby generating eddy currents in the workpiece to a great value and accumulate in a small area, Caused by thermal effects, the workpiece heated to the critical point