B+级钢(ZG25CrMnNi)铸造铁路货车摇枕和侧架后,存在各种贯穿性铸造缺陷,需进行堆焊修复;然而焊缝热影响区的粗大魏氏组织,经过3次正火处理均没得到有效消除。解决方法,首先改堆焊为多层多道焊,将魏氏组织的严重程度降到最低;再者就是在正火前增加一道中间退火工序,重新构建组织结构,有效地杜绝了粗大魏氏组织的遗传性,达到了改善组织的目的。 B + grade steel (ZG25CrMnNi) Casting railway bolsters and side frames, there are a variety of penetration casting defects, the need for surfacing repair; However, heat affected zone of coarse Widman’s organization, after three normalizing were not Be effectively eliminated. The solution is to first change the welding to multi-layer multi-pass welding to minimize the severity of Westend tissue. In addition, an intermediate annealing process is added before normalizing to rebuild the organizational structure and effectively eliminate the coarse Wid Organizational heredity, to achieve the purpose of improving the organization.