低碳焊材在15CrMo钢焊接中的应用研究  

Application of Low Carbon Welding Materials in Welding of 15CrMo Steel

作　　者：汤振兴[1] 闫芳[1] 刘继鹏[2] 

机构地区：[1]郑州航空工业管理学院土木建筑工程学院,河南郑州450000 [2]河南工程学院土木材料工程学院,河南郑州450001

出　　处：《铸造技术》2017年第7期1738-1741,共4页Foundry Technology

摘　　要：以A102奥氏体不锈钢焊条、R307珠光体耐热钢焊条和Ni317镍基焊条为焊接材料,对15CrMo钢进行手工电弧焊焊接处理,对比分析了3种不同焊接接头的焊缝组织与碳元素分布。结果表明,A102奥氏体不锈钢焊接接头的钢结构母材侧出现了5μm的脱碳层,A102侧出现了10μm的增碳层,碳元素从钢结构母材向A102侧发生了碳迁移。在Ni317侧和钢结构母材侧都没有出现脱碳层或者增碳层,在靠近钢结构母材侧的碳元素峰值较母材有所增加但是幅度不大,Ni317镍基焊接接头中没有发现明显的碳扩散和迁移。在采用R307珠光体耐热钢焊条对钢结构进行焊接和时效热处理过程中,熔合区界面处的碳含量发生了扩散和迁移,且方向为从R307侧向钢结构母材侧移动。对比分析可见,Ni317镍基焊接接头的焊接组织较好,可作为生态钢结构的焊材。Using A102 austenitic stainless steel welding rod, R307 pearlite heat resistant steel electrode and Ni317 nickel base welding rod as welding material, the steel structure of the garden was welded by manual arc welding. The weld microstructure and carbon distribution of different welded joints were analyzed. The results show that the decarburization layer about 5 pLm appears in base metal side of the joints using A102 austenitic stainless steel welding, and the carburized layer about 10 ~m appears in A102 steel side, carbon element migrates from the base metal side to the A102 side. Using Ni317 welding rod, there is no decarburized layer or carburized layer in the Ni317 side and the steel base metal side, the peak of carbon content near the base metal side is higher than the base metal, but the range is not large, no obvious carbon diffusion and migration is found in the Ni317 nickel base weld joint. In the process of welding and aging heat treatment of steel structure using R307 pearlite heat resistant steel electrode, the content of carbon in the interface of the fusion zone has the diffusion and migration, and the direction is from the R307 side to the steel base. The joint microstructure using Ni317 welding rod is better..

关 键 词：钢结构 焊材 脱碳层 增碳层 碳浓度 

分 类 号：TG457.11[金属学及工艺—焊接]