艾建阳,胡裕龙,王皓,刘信.双相不锈钢及其焊接接头腐蚀研究进展[J].表面技术,2022,51(4):77-91.
AI Jian-yang,HU Yu-long,WANG Hao,LIU Xin.Research Progress on Corrosion of Duplex Stainless Steel and Its Welded Joint[J].Surface Technology,2022,51(4):77-91
双相不锈钢及其焊接接头腐蚀研究进展
Research Progress on Corrosion of Duplex Stainless Steel and Its Welded Joint
投稿时间:2021-02-04  修订日期:2021-06-27
DOI:10.16490/j.cnki.issn.1001-3660.2022.04.007
中文关键词:  双相不锈钢  焊接接头  耐蚀性  合金元素  二次相  焊接工艺
英文关键词:duplex stainless steel  welded joint  corrosion resistance  alloy element  secondary phase  welding technology
基金项目:
作者单位
艾建阳 海军工程大学 基础部,武汉430033 
胡裕龙 海军工程大学 基础部,武汉430033 
王皓 海军工程大学 基础部,武汉430033 
刘信 海军工程大学 基础部,武汉430033 
AuthorInstitution
AI Jian-yang Department of Foundation, Naval University of Engineering, Wuhan 430033, China 
HU Yu-long Department of Foundation, Naval University of Engineering, Wuhan 430033, China 
WANG Hao Department of Foundation, Naval University of Engineering, Wuhan 430033, China 
LIU Xin Department of Foundation, Naval University of Engineering, Wuhan 430033, China 
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中文摘要:
      双相不锈钢耐点蚀、耐晶间腐蚀和耐氯化物应力腐蚀性能优良,是优良的海洋用金属材料,但其焊接接头常成为薄弱区而发生腐蚀问题。从材料因素综述了双相不锈钢腐蚀研究的进展。首先,总结了合金元素和热处理对双相不锈钢耐腐蚀性能的影响。合金元素分配及其引起的二次相析出及产生的元素贫化区、铁素体/奥氏体相比例的变化决定双相不锈钢的耐腐蚀性能,固溶处理可消除二次相及其周围的贫Cr区、改善铁素体/奥氏体相比例而提高钢的耐腐蚀性能。其次,分析了双相不锈钢焊接接头的腐蚀特点,综述分析了焊接方法、热输入、保护气体、焊后热处理对焊接接头耐蚀性的影响。钨极氩弧焊(TIG)焊接接头的耐局部腐蚀性能良好,采用合适热输入的多道焊,并控制好层间温度,可提高焊接接头的耐腐蚀性能。固溶处理虽可提高接头的耐腐蚀性能,但目前难以应用于管路等工程构件的焊接接头。最后,简要探讨了目前不锈钢腐蚀研究存在的问题和下一步的研究方向。
英文摘要:
      Duplex stainless steels (DSS) are the good materials for marine application because of their well resistance to pitting corrosion, intergranular corrosion and chloride stress corrosion. But the welded joint is usually the weakest zone of DSS which often causes various corrosion problems. The research progress of DSS corrosion has been reviewed from the perspective of material factors. Firstly, the effects of alloy element and heat treatment on the resistance of DSS corrosion were summarized. The corrosion resistance is determined by the distribution of alloy elements, the precipitation of secondary phase and the ratio of ferrite to austenite. The solution treatment can eliminate the secondary phases and the Cr-depleted zones adjacent to the secondary phases, mend the ratio of ferrite to austenite, and improve the corrosion resistance of DSS. Secondly, the corrosion characteristics of DSS welded joints were analyzed, and the effects of welding method, heat input, shielding gas and post-weld heat treatment on the corrosion resistance of welded joints were summarized. The resistance to localized corrosion of tungsten inert gas welding (TIG) joint is well. The corrosion resistance of welded joint can be improved by adopting multi pass welding with suitable heat input and controlling over interlayer temperature. Although the solution treatment can improve the corrosion resistance of the joint, it is difficult to be applied to the welded joint of pipeline and other engineering components. Finally, the current problems of DSS corrosion research are discussed, and the future research trends are pointed out.
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