Microstructure and Properties of the Welded Joints of SAF2205/16MnR Duplex Stainless Steel Composite Plate
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摘要: 对SAF2205/16MnR双相不锈钢复合板进行了焊接,基层采用手工电弧焊,以E5015焊条为填充材料,过渡层及覆层采用钨极氩弧焊,以ER2209焊丝为填充材料;对焊接接头进行了拉伸试验,利用扫描电镜、光学显微镜及X射线衍射仪等分析了接头过渡层焊缝及其熔合区域的显微组织及物相组成.结果表明:焊接接头的抗拉强度为512 MPa;覆层母材/热影响区/过渡层焊缝之间的显微组织过渡缓和,且铁素体和奥氏体相的比例均在控制范围内;异种金属熔合界面未出现明显的合金元素短程扩散,且在焊缝金属中未发现有M23C6和σ等脆性相析出;所得接头具有良好的力学性能和耐腐蚀性能.Abstract: The welding technology of the composite plate of SAF2205 duplex stainless steel and 16MnR steel was studied. The base metal was welded with E5015 welding rods by shielded metal arc welding (SMAW),and transition region and clad metal were welded with ER2209 welding rods by tungsten inert gas arc welding (TIG). The tensile property,microstructure and phase compositions of joints had been analyzed by means of tensile machine,scanning electron microscopy,optical microscopy and X-ray diffraction,etc. The results show that the tensile strength of the joints was 512 MPa,and the microstructure transition between clad metal/heat affected zone/transition layer weld was mild,and biphase proportion of austenite and ferrite was in the required range. The short distance diffusion of alloy elements near the dissimilar steel fusion zone didnt obviously occur. There was also no precipitation of σ phase and M23C6 in the weld metal,which is advantageous to mechanical properties and corrosion-resistance of the joints.
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Keywords:
- duplex stainless steel /
- composite plate /
- welding technology /
- transition layer weld
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[1] 王能利,郭霖,潘希德,等.20/0Cr18Ni9复合管焊接工艺和接头的抗腐蚀性能[J].焊接,2003(5):23-26. [2] 张万鹏,潘希德,薛锦,等.316/20g超低碳不锈钢复合管的连接[C]//陕西省焊接学术会议论文集.西安:陕西省机械工程学会,2006:37-40. [3] 张俊旺,王文先,黄延平,等.奥氏体不锈钢焊缝金属的电化学腐蚀性能[J].焊接学报,2007,28(2):103-107. [4] 陈茂爱,陈俊华,高进强.复合材料的焊接[M].北京:化学工业出版社,2005:14-18. [5] 殷建军,赵海敏,张勇.GB 6396-1995《复合钢板力学及工艺性能试验方法》简介[J].理化检验-物理分册,2000,36(6):276-281. [6] 柯黎明.焊缝金属铁素体含量对氢致裂纹敏感性的影响[J].焊接学报,1993,14(3):181-185. [7] BULENT K. The interface morphology of diffusion bonded dissimilar stainless steel and medium carbon steel couples[J].Journal of Materials Processing Technology,2007,190(7):138-141. [8] SIEURIN H,SANDSTRM R. Austenite reformation in the heat-affected zone of duplex stainless steel 2205[J].Materials Science and Engineering,2006,418(2):250-256. [9] URENA A,OTERO E,UTRILLA M V. Weldability of a 2205 duplex stainless steel using plasma arc welding[J].Journal of Materials Processing Technology,2007,182(2):624-631. [10] BADJI R,BOUABDALLAH M,BACROIX B. Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds[J].Materials Characterization,2008,59(4):447-453. [11] 刘特森.双相不锈钢中相含量的精确测定[J].理化检验-物理分册,2003,39(8):414-419.
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