在钎焊或热处理的过程中,由于加工应力、温差应力、相变应力的影响导致零件产生变形。尤其是一些直径大且壁又薄的零件,因变形量大而超出加工余量或零件公差允许范围,造成报废。另外,有些航空零件都是用贵重金属材料制成,同时加工周期又长,一件就价值在数千元或万元以上。因此,为了挽救这类零件的变形,我们通过在实践中进行试验摸索,总结出热膨胀校正法。采用这种方法,不仅可以校 In the process of brazing or heat treatment, due to processing stress, temperature stress, phase transformation stress causes deformation of the parts. In particular, some large diameter and thin wall parts, due to large deformation and allowance beyond the allowance of the allowance or tolerance of parts, resulting in scrapped. In addition, some aviation components are made of precious metal materials, while the processing cycle is long, one on the value of thousands of yuan or million. Therefore, in order to save the deformation of such parts, we conclude the thermal expansion correction method by experimenting in practice. Using this method, not only can school