摘要
目的采用激光与缆式焊丝(ER50-6)电弧复合焊对A36中厚板进行了激光-缆式焊丝电弧复合焊接,研究焊接工艺对接头组织和性能的影响以及腐蚀行为规律。方法首先,采用激光与缆式焊丝电弧复合焊的方法进行对接试板焊接实验,其次,对比分析焊接接头的焊缝形貌、力学性能、显微组织;最后进行焊接接头电化学腐蚀试验。结果激光与缆式焊丝电弧复合焊焊缝成形良好,焊接接头拉伸断裂位置在母材,焊缝平均抗拉强度为516 MPa,接头硬度值小于350HV,符合标准要求;焊接接头焊缝区、热影响区显微组织由铁素体、粒状贝氏体和马氏体组成;激光与缆式焊丝电弧复合焊接头耐腐蚀性优于激光-电弧复合焊的耐腐蚀性,母材自腐蚀电位低于焊缝的自腐蚀电位;随着NaCl质量分数的增大,自腐蚀电位向负方向移动,自腐蚀电流密度上升,焊缝容抗弧半径大于母材且随质量分数的增加而减小。结论激光与缆式焊丝电弧复合焊焊接接头组织和性能以及腐蚀行为与激光和单丝电弧复合焊的规律一致,该方法可以为中厚板应用提供理论基础。
The work aims to employ laser-cable type welding wire(CWW)on A36 medium thick plates to examine how the welding process influences the joint structure,properties,and corrosion behavior.Firstly,a butt welding experiment was conducted by laser and CWW arc hybrid welding.Secondly,the morphology,mechanical properties,and microstructure of the welded joint were compared and analyzed.Finally,an electrochemical corrosion test was conducted on the welded joint.The laser-CWW GMAW arc hybrid welding seam had good formation,and the tensile fracture position of the welded joint was broken at the base metal.The average tensile strength of the welding seam was 516 MPa,and the joint hardness was less than 350HV,which met the standard requirements.The microstructure of the weld zone and heat affected zone of the welded joint is composed of ferrite,granular bainite,and martensite.The corrosion resistance of laser-CWW GMAW arc composite welded joints was better than that of laser arc hybrid welding,and the self-corrosion potential of the base material was lower than that of the welding seam.As the mass fraction of NaCl increased,the self-corrosion potential shifted towards the negative direction,the self-corrosion current density increased,and the arc radius of the welding seam capacitance was larger than that of the base metal and decreased with the increase of mass fraction.The microstructure,properties,and corrosion behavior of the welded joint in hybrid welding with laser and cable-type welding wire arc are consistent with those in hybrid welding with laser and single-wire arc.This method can provide a theoretical basis for the application of medium and thick plates.
作者
杨志东
徐锴
何鹏
陈云涛
王相龙
胥国祥
张永顺
YANG Zhidong;XU Kai;HE Peng;CHEN Yuntao;WANG Xianglong;XU Guoxiang;ZHANG Yongshun(Jiangsu Provincial Key Laboratory for Advanced Welding Technology,Jiangsu University of Science and Technology,Jiangsu Zhenjiang 212100,China;Harbin Welding Institute Limited Company,Harbin 150028,China;College of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150006,China)
出处
《精密成形工程》
北大核心
2026年第3期125-133,共9页
Journal of Netshape Forming Engineering
基金
国家自然科学基金(51905231)
中国博士后科学基金(2020M670943)。
关键词
激光-电弧复合焊
缆式焊丝
焊缝组织
力学性能
电化学腐蚀
laser-arc hybrid welding
cable-type welding wire
weld microstructure
mechanical property
electrochemical corrosion
