工艺参数对TiNi合金/TC4钛合金超声波焊焊接接头形貌和力学性能的影响研究  

Study on Effect of Process Parameters on Morphology and Mechanical Properties of TiNi Alloy/TC4 Titanium Alloy Ultrasonic Welding Joint

作　　者：吴鸿燕[1] 陈炯[1] 桑玉蕊[1] 陈玉华[2] 王理涛 WU Hongyan;CHEN Jiong;SANG Yurui;CHEN Yuhua;WANG Litao(Jiujiang Vocational and Technical College,Jiujiang 332007,China;Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]九江职业技术学院,九江332007 [2]南昌航空大学,南昌330063

出　　处：《航空制造技术》2023年第11期71-76,共6页Aeronautical Manufacturing Technology

摘　　要：采用超声波焊对镍和纯铝作为过渡中间层材料的Ti Ni记忆合金和TC4钛合金异种材料进行焊接,研究了不同工艺参数对TiNi/TC4异种金属焊接接头形貌和力学性能的影响规律。结果表明,Al中间层接头界面附近材料的塑性变形程度要远大于Ni中间层接头中的塑性变形,并且有大量的Al被挤出界面。焊接时间和压力对焊接接头的抗拉剪力有明显影响,接头的抗拉剪力随着焊接时间和焊接压力的增加先增大后减小。超声波焊接过程还会改变焊缝区材料的显微硬度,平行于结合面方向,焊核位置相比于未焊接的母材硬度有小幅度的增加,垂直于结合面方向,越接近结合界面,材料的硬度越高,但两者的增幅一般不超过10%。TiNi memory alloy and TC4 titanium alloy dissimilar materials were welded by ultrasonic welding with nickel and pure aluminum as transition interlayer materials.The effects of different process parameters on the morphology and mechanical properties of TiNi/TC4 dissimilar metal welding joints were studied.The results show that the plastic deformation of materials near the interface of Al interlayer is much larger than that of Ni interlayer,and a large amount of Al is extruded from the interface.Welding time and pressure have a significant effect on the tensile shear force of welded joints,and the tensile shear increases first and then decreases with the increase of welding time and pressure.The ultrasonic welding process will also change the microhardness of the weld zone material,parallel to the direction of the bonding surface,the core position compared with the unwelded base material hardness has a small increase,perpendicular to the bonding surface direction,the closer to the bonding interface,the higher the hardness of the material,but the increase of the two generally not more than 10%.

关 键 词：TINI合金 TC4钛合金 工艺参数 超声波焊接 力学性能 

分 类 号：V261.34[航空宇航科学与技术—航空宇航制造工程] V214