合金元素表面富集对高强钢螺母凸焊性能的影响  

Effects of surface enrichment of alloying elements on projection welding of high strength steel

作　　者：张永强[1] 王威[1] 贾松青[1] 刘兴全[1] 王凤会[1] 张建强[1] 章军[1] 

机构地区：[1]首钢技术研究院,北京100043

出　　处：《电焊机》2014年第9期112-114,共3页Electric Welding Machine

摘　　要：研究了合金元素在高强钢SPFC440表面富集情况及其对螺母凸焊性能的影响。结果表明,Mn元素在SPFC440表面富集明显,表层Mn元素为母材中的8.5倍,使材料表层碳当量增加,造成螺母凸焊扭矩下降28%;控制高强钢中Mn元素表面富集程度,是提高高强钢螺母凸焊性能的重要手段。The enrichment of alloying elements on the surface of SPFC440 and its effects on projection welding have been studied. The experiment results indicate the Mn rich band is produced at the surface of SPFC440 that increases the carbon equivalent of surface layer and leads to the poor welding quality.Lowing the surface enrichment of Mn is an important means for the improvement of weldability on the process of high strength steel projection welding.

关 键 词：高强钢 凸焊 合金元素 富集 

分 类 号：TG453.9[金属学及工艺—焊接]