镍含量对2205双相不锈钢焊接接头的影响

doi:10.13228/j.boyuan.issn1006-9356.20200340

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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。

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	王化明
	陈兴润
	潘吉祥
	王常波
	刘森
	马敏敏

关键词 ： 2205双相不锈钢, 焊接接头, 显微组织, 点蚀, 镍含量

Abstract：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.

Key words： 2205 duplex stainless steel welded joint microstructure pitting corrosion nickel content

收稿日期: 2020-06-08

作者简介: 王化明(1973—), 男, 硕士, 高级工程师; E-mail: wanghuaming@jiugang.com

引用本文:

王化明, 陈兴润, 潘吉祥, 王常波, 刘森, 马敏敏. 镍含量对2205双相不锈钢焊接接头的影响[J]. 中国冶金, 2021, 31(2): 38-43. WANG Hua-ming, CHEN Xing-run, PAN Ji-xiang, WANG Chang-bo, LIU Sen, MA Min-min. Effect of nickel content on 2205 duplex stainless steel welds[J]. China Metallurgy, 2021, 31(2): 38-43.

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http://www.zgyj.ac.cn/CN/10.13228/j.boyuan.issn1006-9356.20200340 或 http://www.zgyj.ac.cn/CN/Y2021/V31/I2/38

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