铝合金表面液态钎料声致铺展前沿氧化膜行为及其破除机制  

Oxidation Behavior at the Frontier of Ultrasonic-induced Solder Spreading on the Aluminum Alloy Surface

作　　者：许志武[1] 李政玮 罗潇雨 姬书得[2] 闫久春[1] Xu Zhiwu;Li Zhengwei;Luo Xiaoyu;Ji Shude;Yan Jiuchun(State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China;Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,黑龙江哈尔滨150001 [2]沈阳航空航天大学,辽宁沈阳110136

出　　处：《稀有金属材料与工程》2018年第11期3426-3432,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51574099;50905044)

摘　　要：针对铝合金表面液态钎料声致铺展前沿往往存在氧化膜残留的问题,采用实验与有限元模拟相结合的方法分析了氧化膜残留的特征、原因,并提出相应的消除措施。研究发现,液态钎料声致铺展前沿由于液-气自由表面的影响,其内部声压值大幅下降、无法形成有效的声空化作用,导致润湿界面的氧化膜无法去除。改变超声波作用时间、输入振幅、以及钎料成分都不能解决铺展前沿氧化膜残留的问题。通过改变铺展前沿母材表面结构、避免钎料铺展前沿处于自由状态,可彻底地去除该处润湿界面的氧化膜。本研究对提高超声波涂覆、表面金属化以及超声波钎焊的质量具有重要意义。Since a residual oxide film is liable to occur at the frontier of acoustic-induced solder spreading on the surface of aluminum alloy,we conducted experiments combined with finite simulation analysis to investigate the formation and characteristics of the residual oxide film.Meanwhile,the elimination measures for the oxide residues were proposed.Results show that the acoustic pressure drops significantly at the solder spreading front due to the influence of the free liquid-gas surface,leading to the great depression of the acoustic cavitation effect and thus the residual oxide films cannot be removed at the wetting interface.Although the wetting parameters have been adjusted including ultrasonic time,input amplitude and solder composition,these oxide films still cannot be removed.They can be eliminated thoroughly,however,by constructing the surface of the base metal to avoid a free solder spreading front.The results are of great significance to improve the quality of the ultrasonic-assisted coating,surface metallization and ultrasonic soldering.

关 键 词：超声波钎焊 铺展前沿 氧化膜 有限元模拟 消除措施 

分 类 号：TG453[金属学及工艺—焊接]