在生产矿山机械备件的过程中,由于机加工尺寸超过允许误差值,因此每年要报废相当数量的工件,造成很大浪费。首钢矿山公司机动厂金工车间老工人在有关单位协助下,经几年的试验研究,终于试验成功了利用快速加温热应力恢复矿用备件的方法。热胀冷缩这一物理现象是大家所熟知的。物体受热一般要发生膨胀变形,但当温度恢复之后物体又收缩恢复原状。但实践表明金属在短时间内加热到较高的温度,由于产生的热应力较大,超过金 In the production of mining machinery spare parts, as the machining size exceeds the allowable error value, so every year to scrap a considerable number of workpieces, resulting in a great waste. With the help of the relevant units, the old workers in the metalworking workshop of Shougang Mining Company, a motor shop, finally tested the successful recovery of mining spare parts by using rapid thermal stress after years of experimental research. Thermal expansion and contraction of this physical phenomenon is well known. Objects generally undergo thermal deformation, but when the temperature is restored, the object shrinks again. However, practice shows that the metal is heated to a higher temperature in a short time, due to the greater thermal stress, more than gold