铸—焊,锻—焊结构的大型铸锻件往往是在极大的刚性条件下进行电渣焊接的。因此一般电渣焊缝的质量问题,例如裂纹,未熔合等,在大型铸锻件的焊接中,反应更为敏感。而这样的大件往往是单批或单件生产。因此除了通过试验选择工艺参数以外,它不具备多次生产,反复调整工艺规范的可能性。所以要保证一次获得合格的焊缝质量,除了必须慎重地选择合适的工艺规范以外,它还涉及到设计、材料、设备和操作技术等有关因素。因此必须同 Casting - welding, forging - welding large castings and forgings are often carried out in a very rigid condition of electroslag welding. Therefore, the general quality problems of electroslag welding, such as cracks, unfused, etc., in the welding of large castings and forgings, the reaction is more sensitive. And such large pieces are often single or single piece production. Therefore, in addition to selecting the process parameters through experiments, it does not have the possibility of repeated production and repeated adjustment of the process specifications. Therefore, in order to ensure a qualified weld quality at a time, in addition to the careful selection of appropriate process specifications, it also involves design, materials, equipment and operating techniques. It must be the same