Achieving ultra-high strength friction stir welded joints of high nitrogen stainless steel by forced water cooling

查看全文 作　　者：[1,2]H.Zhang;[1]D.Wang;[1]P.Xue;[1]L.H.Wu;[1]D.R.N;[1]B.L.Xiao;[1,2]Z.Y.Ma

机构地区：[1]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,72 Wenhua Road,Shenyang 110016,China;[2]University of Chinese Academy of Sciences,19 Yuquan Road,Beijing 100049,China

出　　处：《Journal of Materials Science & Technology》索引2018年第34卷第11期,共6页

基　　金：supported by the National Natural Science Foundation of China under grant Nos.51201163,51331008 and 51671190 摘　　要：The microstructure and properties of water-cooled and air-cooled friction stir welded(FSW) ultra-high strength high nitrogen stainless steel joints were comparatively studied. With additional rapid cooling by flowing water, the peak temperature and duration at elevated temperature during FSW were significantly reduced. Compared to those in the air-cooled joint, nugget zone with finer grains(900 nm) and heat affected zone with higher dislocation density were successfully obtained in the water-cooled joint,leading to significantly improved mechanical properties. The wear of the welding tool was significantly reduced with water cooling, resulting in better corrosion resistance during the immersion corrosion test. 关键词：高氮不锈钢焊接工具水冷却关节搅动磨擦强度空气冷却

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Achieving ultra-high strength friction stir welded joints of high nitrogen stainless steel by forced water cooling

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