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交流电点接触表面淬硬是一项新工艺。目前,我厂已将此新工艺用于设备修理中,弥补各类零件因硬度低而易损的缺陷。现介绍一下此新工艺原理及工作中的一些体会。一、简单原理电接触表面淬硬原理如图1所示。当滚轮和工件表面相对转动,滚轮架作轴向移动,在两滚轮之间通以低电压、大电流时,滚轮和工件接触处存在着接触电阻,便产生了一定的电阻热。此热量一部分被工件表面吸收,在1/20～1/25秒时间里,使接触处的局部温度升高到相变温度以上。当滚轮离开后,因空气和
AC point contact surface hardening is a new technology. At present, our factory has used this new technology for equipment repair, to make up for all kinds of parts due to low hardness and vulnerability. Now introduce this new process principle and some experience in the work. First, the simple principle Electrical contact surface hardened principle shown in Figure 1. When the roller and the workpiece surface relative rotation, the roller frame for axial movement, pass between the two rollers with low voltage, high current, the roller and the workpiece contact there is a contact resistance, they have a certain resistance heat. Part of this heat is absorbed by the surface of the workpiece, and the local temperature at the contact is increased above the phase transition temperature in 1/20 to 1/25 seconds. When the wheel left, due to air and