409L和410L铁素体不锈钢焊接接头力学和腐蚀性能对比  

Comparison of mechanical and corrosion properties of weld joints between 409L and 410L ferritic stainless steels

作　　者：田劲松[1] 朱朝明[1] 毛惠刚[2] 

机构地区：[1]宝钢研究院不锈钢技术中心,上海市200431 [2]宝钢股份不锈钢分公司,上海市200431

出　　处：《焊接》2008年第8期53-56,共4页Welding & Joining

摘　　要：采用TIG自熔焊对409L和410L冷轧板进行了焊接试验,并对焊接接头进行了拉伸、杯突和晶间腐蚀试验,试验结果表明,两种铁素体不锈钢焊接接头的塑性和腐蚀性能存在较大差异,410L焊接接头塑性明显低于409L焊接接头塑性,并且410L焊接接头存在晶间腐蚀敏感性,而409L焊接接头无晶间腐蚀敏感性。在对焊接接头进行硬度测试和金相分析的基础上,讨论了两种铁素体不锈钢焊接接头性能差异的原因,C、N含量和是否Ti稳定化是影响焊接接头性能的关键因素。TIG autogenous welding experiments were conducted with the cold rolled sheets of wrought 409L and 410L.Then tensile test,cup test and IGC test were made for the resultant welded joints.The results show that there are great differences in ductility and corrosion resistance between the two types of ferritic stainless steel weld joints.The ductility of 410L welded joint is obviously lower than that of 409L welded joint,and 410L welded joint is sensitive to intergranular corrosion while 409L welded joint is not.The reasons why there are the differences in their properties were discussed based on the hardness tests and metallographic analyses for the welded joints.Carbon content,nitrogen content and titanium stabilization are the key factors in affecting the properties of welded joints.

关 键 词：铁素体不锈钢 焊接 力学性能 晶间腐蚀 

分 类 号：TG457[金属学及工艺—焊接]