20mm厚TC4钛合金熔化极氩弧焊焊接工艺研究  

Research on the Welding Process of 20mm Thick TC4 Titanium Alloy Melting Electrode Argon Arc Welding

作　　者：聂新宇 王立新 崔健伟 李建国 Nie Xinyu;Wang Lixin;Cui Jianwei;Li Jianguo(Inner Mongolia First Machinery Group Co,.Ltd.,Baotou,Inner Mongolia 014030)

机构地区：[1]内蒙古第一机械集团股份有限公司,内蒙古包头014030

出　　处：《包头职业技术学院学报》2024年第4期22-25,共4页Journal of Baotou Vocational & Technical College

摘　　要：文章以20mm厚TC4钛合金板为试验对象,采用不同的气体配比方案进行MIG焊接、并对焊接接头的力学性能进行分析研究。结果表明在进行中厚板钛合金MIG焊时,保护气体易采用Ar50%+He50%气,氦气的加入可以改善熔池的流动性,降低焊接飞溅,提高焊接效率,只要制作合适的气体保护拖罩就能够实现高效、高质量焊接,且焊接操作简单,易于实现机器人自动化焊接;钛合金MIG焊焊接过程中要控制层间温度,随着焊接热循环温度升高,焊缝中生成的马氏体含量增加,焊缝硬度升高、塑性下降,应采用大电流快速焊的焊接工艺。This article takes 20mm thick TC4 titanium alloy plate as the experimental object,uses different gas ratio schemes for MIG welding,and analyzes and studies the mechanical properties of the welded joints.The results show that during the MIG welding of medium and thick titanium alloy plates,Ar50%+He50%gas is easily used as the shielding gas.The addition of helium gas can improve the fluidity of the melting pool,reduce welding spatter,and improve welding efficiency.As long as a suitable gas protection drag cover is made,efficient and high-quality welding can be achieved,the welding operation is simple,and it is easy to achieve robot automation welding.During the titanium alloy MIG welding process,it is necessary to control the interlayer temperature.As the welding thermal cycle temperature increases,the content of martensite generated in the weld increases,the hardness of the weld increases,and the plasticity decreases.Therefore,a high current rapid welding process should be adopted.

关 键 词：钛合金 熔化极氩弧焊 力学性能 

分 类 号：TG1[金属学及工艺—金属学]