2219铝合金中厚板爬坡TIG焊熔池温度场三维数值模拟  

Three-dimensional numerical simulation of the temperature field on climbing-TIG welding process of 2219 aluminium alloy medium thickness plate

作　　者：肖宏 宋建岭 王雷 韩国良 邓利芬 常保华 XIAO Hong;SONG Jian-ling;WANG Lei;HAN Guo-liang;DENG Li-fen;CHANG Bao-hua(Tianjin Launch Vehicle Long March Manufacture Co.Ltd.,Tianjin 300462,China;School of Mechanical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]天津航天长征火箭制造有限公司,天津300462 [2]清华大学机械学院,北京100084

出　　处：《焊接技术》2018年第3期31-34,97,共5页Welding Technology

摘　　要：为了研究2219铝合金中厚板爬坡TIG焊熔池热场特征,建立了中厚板TIG焊温度场模型,进行爬坡TIG焊熔池温度场三维数值模拟,以及不同焊接工艺参数对温度场的影响数值分析,同时通过焊缝形状尺寸的测定以及热电偶测温,对模型及温度场数值模拟结果进行验证。结果表明,受熔池重力影响,厚板爬坡姿态下熔池热场长度要大于平焊姿态;爬坡TIG焊温度场受焊接电流、焊接速度影响明显,焊接电流增加或者焊接速度降低,均会导致温度场最高温度上升,熔池宽度和长度增加;测量的实际焊缝尺寸与熔池温度场数据和数值计算结果相符度高,建立的模型及爬坡焊温度场三维数值计算准确。In order to study the temperature field of 2219 aluminium alloy on the process of climbing-TIG welding,the mathematical model was established.A three-dimensional numerical simulation was conducted for the process,and numerical analysis of different welding parameters to the temperature field were studied.To verify the mathematical model and numerical analysis result,the weld bead geometry and thermocouple temperature were measuring.The results showed that the length of climbing-TIG welding temperature field was more than the length of down land weld.Welding current and welding speed were the main influence factors for the temperature field of climbing-TIG welding.To increase the welding current and to decrease the welding speed,the maximum temperature and the length of welding pool were increasing.The result of the weld bead geometry and thermocouple temperature showed that the mathematical model and three-dimensional numerical simulation were accurate.

关 键 词：2219铝合金 爬坡TIG焊 温度场 三维数值模拟 

分 类 号：TG444.74[金属学及工艺—焊接]