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材料工程  2016, Vol. 44 Issue (3): 66-71    DOI: 10.11868/j.issn.1001-4381.2016.03.011
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
超声振动与激光加热耦合条件下Al基钎料在TiNi形状记忆合金表面润湿铺展行为
李红, 陶博浩, 栗卓新, 郭福
北京工业大学材料科学与工程学院, 北京 100124
Spreading and Wetting Behavior of Al-based Brazing Filler Metal on TiNi Shape Memory Alloy Substrate by Coupled Effect of Ultrasonic Vibration and Laser Heating
LI Hong, TAO Bo-hao, LI Zhuo-xin, GUO Fu
College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
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摘要 采用一种超声辅助激光钎焊的方法,对低熔点的Al基钎料在TiNi形状记忆合金合金表面进行了润湿性实验。研究结果表明:随超声时间增加,钎料铺展面积先增大后减少,润湿角先减小后增大。钎料润湿前沿存在Al2Si,Al3Si,AlSi等相,钎料熔滴中心靠近界面处,AlSi和AlSiTi相的晶粒尺寸及其中Si元素的含量均随超声时间增加而逐渐增大;随着激光功率的降低,钎料铺展面积逐渐降低,润湿角逐渐增大,在钎料熔滴中心靠近界面处生长出宽度小于10μm的AlSi(Ti,Ni)金属间化合物。当超声振动时间为1.0s,激光功率470W,母材表面粗糙度为0.03μm时,实验获得的最大铺展面积为106.45mm2,最小润湿角为16°。
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李红
陶博浩
栗卓新
郭福
关键词 超声振动激光钎焊钎料TiNi形状记忆合金润湿    
Abstract:Laser was used as heating source and laser brazing assisted with ultrasound was performed,aiming to wet Al-based brazing filler metal with low melting points on TiNi SMA substrates. The result shows that with the increase of ultrasonic time,the spreading areas increase firstly and then decrease. Black Al2Si,Al3Si,AlSi phases are observed at wetting frontier. The grain size of AlSi and AlSiTi phases in the center of the droplet near interfacial region, as well as the Si content contain in these grains increases with ultrasonic time. In addition,with the decrease of laser heating power,the spreading areas also decrease,whereas the wetting angle increases. Intermetallic compound AlSi(Ti,Ni) with a width less than 10μm grows in the center of the droplet near interfacial region. Under the following optimal processing parameters,ultrasonic vibration time 1.0s,laser heating power 470W and the substrate surface roughness 0.03μm,the maximum spreading areas obtained is 106.45mm2 and the optimum wetting angle is 16°.
Key wordsultrasonic vibration    laser brazing    brazing filler metal    TiNi SMA    wetting
收稿日期: 2014-01-12      出版日期: 2016-03-22
中图分类号:  TG454  
通讯作者: 李红(1977-),女,副教授,博士,主要从事钎焊及特种连接研究,联系地址:北京市朝阳区平乐园100号北京工业大学材料科学与工程学院(100124),E-mail:hongli@bjut.edu.cn     E-mail: hongli@bjut.edu.cn
引用本文:   
李红, 陶博浩, 栗卓新, 郭福. 超声振动与激光加热耦合条件下Al基钎料在TiNi形状记忆合金表面润湿铺展行为[J]. 材料工程, 2016, 44(3): 66-71.
LI Hong, TAO Bo-hao, LI Zhuo-xin, GUO Fu. Spreading and Wetting Behavior of Al-based Brazing Filler Metal on TiNi Shape Memory Alloy Substrate by Coupled Effect of Ultrasonic Vibration and Laser Heating. Journal of Materials Engineering, 2016, 44(3): 66-71.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.03.011      或      http://jme.biam.ac.cn/CN/Y2016/V44/I3/66
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