摘要
采用熔化极活性气体保护焊(MAG焊)工艺,对2.8 mm厚08Cr19MnNi3Cu2N低镍含氮奥氏体不锈钢试板进行焊接。选取ER308L和ER307Si两种焊丝,借助光学显微镜、力学性能测试及晶间腐蚀等分析方法,对焊接接头组织和性能进行系统评价和分析。结果表明:两种焊丝获得焊缝组织均为奥氏体+δ-铁素体,且奥氏体含量均在91%以上;ER307Si焊丝的焊接接头γ-固溶体含量较高,但是焊缝区域硬度略低;Ni元素含量的降低使得两种接头的抗点蚀能力下降,但抗晶间腐蚀性能表现优异。
The test plate of 2.8 mm thick 08Cr19MnNi3Cu2N austenitic stainless steel with low nickel and nitrogen was welded by MAG welding process.The welding wires ER308L and ER307Si with different alloy elements were selected to systematically evaluate and analyze the microstructure and properties of welded joints with the analysis methods of optical microscope,mechanical property test and corrosion.The results showed that the weld zone microstructure obtained by the two kinds of wire was austenite+ferrite,and the austenite content was above 91%.The content ofγ-solid solution in the welded joint of ER307Si wire was higher,but the hardness of the weld metal was slightly lower.The low Ni content makes the anti-pitting energy of the two joints decrease,but the resistance to intergranular corrosion energy is excellent.
作者
方乃文
黄瑞生
杨义成
徐亦楠
黄彩艳
Fang Naiwen;Huang Ruisheng;Yang Yicheng;Xu Yinan;Huang Caiyan(Harbin Welding Institute Limited Company,Harbin 150028,China)
出处
《机械制造文摘（焊接分册）》
2019年第6期20-25,共6页
Welding Digest of Machinery Manufacturing
基金
哈尔滨焊接研究院有限公司技术发展基金(201916120)
