一、概述大家知道,一般弹簧钢热处理都是经淬火后中温回火,由于回火加热温度较低,因而所需的时间都较长,操作也较麻烦,而且还需要专为它设置回火炉。淬火后的弹簧钢加热到临界点A_(c1)以下的回火操作对钢的机械性能变化的影响已有过充分的研究。但是,对于临界 A_(c1)以上的回火操作对其机械性能的影响等问 First, an overview As we all know, the general spring steel heat treatment are quenched after tempering, due to tempering heating temperature is low, so the required time is longer, the operation is more troublesome, but also need to set up specifically for it back to the stove . The effect of the tempering operation of the quenched spring steel to the critical point A_ (c1) below on the mechanical properties of the steel has been well studied. However, for the critical A_ (c1) above the tempering operation on the mechanical properties of such questions