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首页> 外文期刊>Journal of Materials Engineering and Performance >The Microstructure and Pitting Resistance of Weld Joints of 2205 Duplex Stainless Steel
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The Microstructure and Pitting Resistance of Weld Joints of 2205 Duplex Stainless Steel

机译：2205双相不锈钢焊接接头的微观结构和蚀性电阻

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摘要

2205 duplex stainless steel (DSS) was welded by submerged arc welding. The effects of both heat input and groove type on the ferrite/austenite ratio and elemental diffusion of weld joints were investigated. The relationships among welding joint preparation, ferrite/austenite ratio, elemental diffusion, and pitting corrosion resistance of weld joints were analyzed. When the Ni content of the weld wire deposit was at minimum 2-4% higher than that of 2205 DSS base metal, the desired ratio of ferrite/austenite and elemental partitioning between the austenite and ferrite phases were obtained. While the pitting sensitivity of weld metal was higher than that of base metal, the self-healing capability of the passive film of weld metal was better than that of the base metal when a single V-type groove was used. Furthermore, the heat input should be carefully controlled since pitting corrosion occurred readily in the coarse-grained heat-affected zone near the fusion line of welded joints.
机译：采用埋弧焊焊接2205双相不锈钢（DSS）。研究了热输入和坡口类型对焊接接头铁素体/奥氏体比和元素扩散的影响。分析了焊接接头制备、铁素体/奥氏体比、元素扩散和焊接接头抗点蚀性之间的关系。当焊丝熔敷层的镍含量比2205 DSS母材至少高2-4%时，可获得所需的铁素体/奥氏体比率以及奥氏体和铁素体相之间的元素分配。当焊缝金属的点蚀敏感性高于母材金属时，当使用单个V型坡口时，焊缝金属钝化膜的自愈能力优于母材金属。此外，应小心控制热量输入，因为在靠近焊接接头熔合线的粗晶热影响区容易发生点蚀。

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