OPTIMUM DESIGN AND DEVELOPMENT OF HIGH STRENGTH AND TOUGHNESS WELDING WIRE FOR PIPELINE STEEL
Pipeline steel with higher strength(>800MPa)has been gradually used in recent years,so how to achieve good match of base metal and weld deposit is very important for its practical application.Based on the alloy system of 0.02-0.04%C,2.0%Mn and 0.5%Si,four different kinds of welding wires were designed and produced.The effects of alloy elements on phase transformation and mechanical properties were analyzed.Experimental results show that the designed steels with the addition of 2-4%Ni+Cr+Mo and <0.2%Nb+V+Ti have high strength(>800MPa)and good elongation(>15%).The microstructure of deposits metal is mainly composed of granular bainite and M-A constituents with the mean size of 0.2-07μm are dispersed on ferritic matrix.The deposited metals have good match of strength(>800MPa)and impact toughness(>130J)which well meet the requirement of pipeline welding.
pipeline steel weld deposits alloy system phase transformation
Cuixin Chen Haitao Xue Fuxing Yin Huifen Peng Lei Zhi Sixu Wang
School of Materials Science and Engineering,Hebei University of Technology,Tian Jin,300130,China;Res School of Materials Science and Engineering,Hebei University of Technology,Tian Jin,300130,China Research Institute for Energy Equipment Materials,Hebei University of Technology,Tian Jin,300130,Chi
国际会议
Energy Materials 2014(第一届能源材料国际会议)
西安
英文
665-672
2014-11-04（万方平台首次上网日期，不代表论文的发表时间）