EFFECT OF PIPE BODY ALLOY ON WELDABILITY OF X80 STEEL
Effect of Mo,Ni,and Cr on impact property of pipe seam and heat-affected zone(HAZ)of X80 steel was investigated by thermal simulation test and butt welding test.The results showed that,there was an obvious relationship between strip”s composition and the toughness of weld and HAZ,the more content of Mo,Ni and less of Cr in the strip matrix,the better of impact toughness of weld and HAZ.Metallographic microscope was used to compare microstructures of welding specimens,every welded seam microstructure was mainly acicular ferrite(AF)and a little volume of proeutectoid ferrite(PF),and with some granular precipitations on original austenite grain boundary,the difference was that there were more PF and less precipitations of the specimen with more content of Mo,Ni and less of Cr in the strip matrix.Because of the high price of Mo and Ni,alloy design must be considered comprehensively with the cost and property requirements in the production.
Thermal simulation Butt welding Alloy Impact toughness
Xianglei Kong Guojian Huang Kuijun Fu Fangfang Liu Minghao Huang Yinghui Zhang
Iron & Steel Research Institute of ANGANG Group,Anshan Liaoning 114009,P.R. China
国内会议
杭州
英文
467-473
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）