我厂恢复上游型机车生产后,原经过精加工的车架片因存放多年而汽缸座面上满布0.5～0.7毫米的腐蚀点,不符合使用要求。为了恢复其使用功能,采用电弧焊补。将腐蚀部位修复到原型尺寸,达到了使用要求。但焊后的变形量超过了允许数值,有的经矫正虽能达到使用要求,但时间浪费很大,有的矫正无效而报废。此外,焊后产生的残余应力,对车架片质量有着不同程度的影响。例如,在焊后机械加工时,将影响其加工尺 I plant to resume the production of the upstream locomotive, the original after finishing the rack for many years because of the cylinder seat surface covered with 0.5 to 0.7 mm of corrosion points, does not meet the requirements. In order to restore its use of functions, the use of arc welding make up. Corrosion will be repaired to prototype size, to meet the requirements. However, the amount of deformation after welding exceeds the allowable value, although some can be corrected by the use of requirements, but a lot of time wasted, and some invalidation invalid and scrapped. In addition, the residual stress produced after welding has a varying degree of impact on the quality of the frame piece. For example, in the post-weld machining, will affect its processing ruler