机车车辆板簧是转向架的重要零部件之一。在运载中承受车体传来的压力,而簧片则承受交变的弯应力。当受力超过簧片材料强度时,即在表面产生疲劳裂纹,甚至导致折损,威胁行车安全。过去我厂在施行机车车辆厂修时,为检查板簧裂纹,将板簧全部退箍,经热处理(因退箍时已退火)、打砂 Rolling vehicle leaf spring is one of the important parts of the bogie. In the carriage to withstand the pressure from the body, while the reeds are subject to alternating bending stress. When the force exceeds the strength of the reed material, that is, fatigue cracks on the surface, and even lead to compromise, threatening traffic safety. In the past I plant in the implementation of rolling stock factory repair, in order to check the leaf spring cracks, the leaf spring all the hoop, the heat treatment (annealing retreat because), playing sand