我厂加工铸铁减速箱时,发现其中三个底座上出现气孔和裂纹缺陷。底座材质为HT18-36。由于减速箱底座要与箱盖配合,且箱内要储存润滑剂,所以对补焊后的变形,密封性等均有严格的要求。根据缺陷的不同性质,制定不同补焊工艺,补焊后效果良好,现介绍如下: 第一个底座为成品状态,无加工余量。缺 I plant processing iron gearbox, found that there are three holes on the base and crack defects. Base material is HT18-36. As the gearbox base to be with the lid, and the box to store lubricant, so the welding after the deformation, sealing, etc. have strict requirements. According to the different nature of the defects, make different welding technology, good effect after repair welding, are introduced as follows: The first base for the finished product state, no machining allowance. lack