镍含量对2205双相不锈钢焊接接头的影响  

Effect of nickel content on 2205 duplex stainless steel welds

作　　者：王化明[1] 陈兴润[1] 潘吉祥[1] 王常波 刘森 马敏敏 WANG Hua-ming;CHEN Xing-run;PAN Ji-xiang;WANG Chang-bo;LIU Sen;MA Min-min(Hongxing Iron and Steel Co.,Ltd.,Jiuquan Iron and Steel Group Corporation,Jiayuguan 735100,Gansu,China;Technology Center,Jiuquan Iron and Steel Group Corporation,Jiayuguan 735100,Gansu,China)

机构地区：[1]酒钢集团宏兴钢铁股份有限公司,甘肃嘉峪关735100 [2]酒钢集团技术中心,甘肃嘉峪关735100

出　　处：《中国冶金》2021年第2期38-43,共6页China Metallurgy

摘　　要：采用光学显微镜观察了不同镍含量下2205双相不锈钢焊接接头的金相组织,通过点腐蚀试验测量腐蚀速率,并采用电化学工作站对焊接接头的点蚀电位进行测量。结果表明,1.2 mm厚度规格2205双相不锈钢焊接接头为铁素体加奥氏体的两相组织,点蚀坑主要出现在热影响区和焊缝。镍含量高的样品金相组织中奥氏体含量高,对应点蚀电位也要高于镍含量低的样品。耐点蚀性能上的差异与接头中两相比例有关。The microstructures of the welded joint of 2205 duplex stainless steel with different nickel content were studied by optical microscope. The corrosion rate was measured by the pitting corrosion test. The pitting potential of the welded joint was measured by the electrochemical workstation. The results showed that the microstructures of the welded joint of 2205 duplex stainless steel with a thickness of 1.2 mm were two-phase microstructure(ferrite+austenite), and pitting pits mainly occurred in heat affected zone and weld metal. The higher the nickel content, the higher the austenite content, and the higher the pitting potential. The difference in pitting corrosion resistance was related to the phase ratio in the joint.

关 键 词：2205双相不锈钢 焊接接头 显微组织 点蚀 镍含量 

分 类 号：TG407[金属学及工艺—焊接]