Welding practice for the commercial duplex stainless steels
The weldability of the commercial duplex stainless steel B2101,B2304,B2205 and B2507 is discussed.Suitable welding methods,filler metals,thermal cycles and proper shielding and root gases are recommended.Properties of all weld metal and welded joints are presented.And parameters for post-weld heat treatment of welds are suggested.The results show that the commercial duplex stainless steels have as good weldability as the austenitic stainless steels,but too low and too high heat inputs should both be avoided,as both extremes can lower the corrosion resistance of the welded joint.Nitrogen additions to the shielding gas and the root gas can be used with advantage,when a higher corrosion resistance is desired in weld,than normally can be obtained by pure argon.Also short-time post-heat treatment at a proper temperature range has a beneficial effect on the pitting corrosion resistance of welded joint.The excellent comprehensive property of commercial duplex stainless steels joints can be obtained with appropriate welding method and welding procedure.
duplex stainless steel welding corrosion resistance
WANG Zhiyu ZHANG Wei SONG Hongmei
Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China
国内会议
上海
英文
1-7
2013-06-01（万方平台首次上网日期，不代表论文的发表时间）