薄壁TC4钛合金激光焊缝成型与性能调控研究进展  

Research progress of weld formation and performance control of thin plate TC4 titanium alloy by laser welding

作　　者：于航 李军兆 张望成 孙清洁 Yu Hang;Li Junzhao;Zhang Wangcheng;Sun Qingjie(Hunan Xiangtou Goldsky New Materials Co.,Ltd.,Yiyang 413057,Hunan,China;Harbin Institute of Technology at Weihai,Weihai 264209,Shandong,China)

机构地区：[1]湖南湘投金天新材料有限公司,湖南益阳413057 [2]哈尔滨工业大学(威海),山东威海264209

出　　处：《钢铁钒钛》2022年第1期53-66,共14页Iron Steel Vanadium Titanium

基　　金：湖南省科技创新计划项目(S2021 GXKJCX0287)。

摘　　要：TC4钛合金的焊接工艺及焊接性研究一直受到国内外的广泛关注,主要综述了目前激光焊工艺对薄壁TC4钛合金焊缝几何形状、显微组织及力学性能影响的研究进展。简要分析了激光焊接工艺对焊缝几何形状及焊缝显微组织转变的规律,并对焊缝几何形状和显微组织的转变机理进行了探讨。研究发现,激光焊焊缝几何形状的变化主要原因在于焊接热输入的变化导致焊接过程中激光焊匙孔形状及模式发生了改变;焊接热输入的增加会引起显微组织的转变,焊缝金属中针状马氏体α’相是主要的强化相,块状α;和魏氏α相是主要的韧性相;应对激光能量进行严格的控制,以便在实际生产应用中提高焊接质量。The research on welding process and weldability of TC4 titanium alloy has been widely concerned at home and abroad.Therefore,this paper mainly reviewed the current research progress of the effect of laser welding process on the geometrical dimensions,microstructure and mechanical properties of thin plate TC4 alloy.The weld geometrical dimension and microstructure transformation as well as the related mechanism were analyzed and discussed.It is found that the change of weld geometrical dimension is mainly due to the variation of welding heat input,which leads to the change of laser welding keyhole shape and mode.The increase of welding heat input causes the transformation of the microstructure.The acicular martensiteα’phase is the main strengthening phase,with the blockyαm and Widmanstattenαphase as the main malleable phases.The laser energy should be strictly controlled to improve the welding quality in actual production applications.

关 键 词：TC4 激光焊接 焊缝几何形状 显微组织 力学性能 

分 类 号：TF823[冶金工程—有色金属冶金] TG456.7[金属学及工艺—焊接]