摘要
文中采用基于焊缝形貌的温度热源模型高效计算其热过程,通过单丝CO2气体保护焊堆焊件的温度场计算和焊缝形貌比较验证该热源模型的正确性,采用小孔法测试表面应力验证基于该热源模型的残余应力计算结果.结果表明,基于焊缝形貌的给定温度热源模型适用于缆式焊丝CO2气体保护焊的焊接温度场高效数值模拟;缆式焊丝CO2气体保护焊的上表面焊缝区域及焊缝中心沿厚度方向的应力分布与埋弧焊基本一致,但远离焊缝区域的纵向压缩应力幅值大于埋弧焊纵向压缩应力.
Gas metal arc welding（GMAW） with cable-type wire is an innovative welding method which provided prominent advantages of high efficiency and low power consumption.Untill now,it has rare report on the welding residual stress of the new welding method.In the present study,the heat source model based on the welding seam profile is adopted to efficiently simulate the weding tempature field,and it is validated by comparison of simulated temperature field and experimental welding seam profile of bead-on-plate welding through GMAW with single wire.In addition,the simulated residual stress results are compared with the experimental ones on the top surface obtained by the hole drilling method.The investigated results show that the heat source model based on the weld seam profile is suitable for efficient temperature field simulation of GMAW with cable-type wire;on the top surface within the welding line and adjacent region,the residual stress distribution and magnitude of GMAW with cable-type wire are almost identical to those of submerged arc welding（SAW） under the same welding specifications,however,in the region far from the welding line,the amplitude of longitudinal compressive residual stress induced by GMAW with cable-type wire is larger than that induced by SAW.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2012年第5期17-20,114,共4页
Transactions of The China Welding Institution
基金
国家自然科学基金青年基金资助项目(51005106)
江苏省高校优势学科建设工程资助项目
江苏省先进焊接技术重点试验室开放基金资助项目
关键词
缆式焊丝
气体保护焊
残余应力
高效数值计算
cable-type welding wire
gas metal arc welding
residual stress
efficient numerical simulation
