双相不锈钢不同电弧焊接方法的接头性能对比分析  

Comparative analysis for joint performance of duplex stainless steel by different arc welding methods

作　　者：王治宇[1] 韩俭[1] 宋红梅[1] 江来珠[1] 

机构地区：[1]宝山钢铁股份有限公司宝钢研究院,上海201900

出　　处：《焊接学报》2011年第4期37-40,114-115,共4页Transactions of The China Welding Institution

基　　金：2009年度上海市高新技术产业化基金资助项目

摘　　要：利用焊条电弧焊（SMAW）、钨极氩弧焊（TIG）、埋弧焊（SAW）三种焊接方法对15 mm厚2205双相不锈钢工业板进行了焊接试验,分析了焊后接头的微观组织、力学性能和腐蚀性能.结果表明,不同焊接方法得到的接头焊缝区及热影响区α相比例均在30%-60%范围内,接头抗拉强度与母材相当,TIG和SAW接头焊缝区-40℃冲击吸收功分别为133和78 J,明显高于SMAW的37 J;而SAW接头热影响区因累积热输入量最小,-40℃时冲击吸收功为207 J,高于TIG的122 J和SMAW的109 J.在-60~20℃温度区间,TIG焊接头焊缝区及热影响区冲击吸收功均高于SMAW.TIG和SAW接头耐点腐蚀能力相当,SMAW稍差.综合可见,TIG焊接头综合性能最好,SAW,SMAW次之.The welding tests are conducted on 15 mm thick plates of duplex stainless steel 2205 by three different arc welding methods(SMAW,TIG and SAW),and the microstructure,mechanical property and corrosive property of welded joints are analyzed.The results indicate that the phase ratio of ferrite in weld metal and heat-affected zone of the joints is controlled between 30%-60%,the tensile strength of the joints is near the same as that of base metal,the impact absorbed energy of weld metal by TIG and SAW at-40 ℃ is 133 J and 78 J respectively,higher than 37 J of SMAW significantly,and impact absorbed energy of heat-affected zone in the joint welded by SAW at-40 ℃ is 207 J,higher than 122 J of TIG and 109 J of SMAW because of its lowest total heat input.In the temperature range from-60 ℃ to 20 ℃,the impact absorbed energy of weld metal and heat-affected zone in the joint welded by TIG is higher than that of SMAW.The pitting corrosion resistance of the joints welded by TIG and SAW is near the same,better than that of SMAW.The comprehensive property of TIG joint is the best,and then that of SAW,last the SMAW.

关 键 词：双相不锈钢 电弧焊接 微观组织 冲击吸收功 点腐蚀 

分 类 号：TG457[金属学及工艺—焊接]