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采用开坡口的手工电弧焊方法对已存在缺陷的B级钢(ZG25CrMnNi)铁路货车摇枕侧架进行堆焊修复,并对焊后件进行了组织观察、硬度、拉伸性能和低温冲击韧性检测。结果表明:B级钢焊补后具有良好的力学性能;焊缝组织为不同生长方向的柱状晶,相变重结晶区内为均匀细小的珠光体和铁素体组织,但是在过热区内出现了魏氏组织,同时仍然产生了一些焊接缺陷,如气孔、夹杂、魏氏组织等,且焊接坡口内的组织不太均匀,需要进一步采取一定的方法进行改善。
By using the manual arc welding method with bevel, surfacing repair was carried out on the side frame of the existing grade B steel (ZG25CrMnNi) railway wagon, and the microstructure, hardness, tensile properties and low temperature impact toughness Detection. The results show that the B grade steel has good mechanical properties after welding. The weld microstructure is a columnar crystal with different growth direction. The phase transformation recrystallization zone is uniformly fine pearlite and ferrite, but appears in the overheated zone Wei organization, but still produced some welding defects, such as porosity, inclusions, Wei’s organization, and the welding groove within the organization is not uniform, need to take some further steps to be improved.