摘要
润湿性研究是熔钎焊过程中保证良好焊接成形及有效连接的关键。本文以CMT条件下AZ61合金在纯钛表面的润湿为研究对象,应用高速摄像及图像分析软件研究了不同送丝速度下镁合金熔滴在纯钛表面的润湿行为。通过对动态润湿行为与界面微观结构的表征,建立起了焊接热输入(送丝速度)与润湿性之间的联系;应用吸附能模型揭示了界面元素偏聚的热力学本质,其中润湿机理为微量组元铝与钛的界面反应消除了钛表面的氧化膜进而促进了润湿。
The study of wettability is the key to ensuring good weld formation and effective joining during the weldingbrazing process.In this paper,the wetting of AZ61 Mg alloy on pure titanium surface under cold metal transition conditions was studied.By using high speed camera and image analysis software,the wetting behaviors of AZ61 Mg alloy on surface of pure Ti were studied.Based on the results of dynamic wetting behavior and interface microstructures,the relationship between welding heat input(wire feeding speed)and wettability was established.The adsorption energy model was used to reveal the thermodynamic nature of interface element segregation,in which wetting mechanism is that the interfacial reaction between the aluminum and titanium and then removing of oxide film on the titanium surface and promoting wetting.
作者
居春艳
隋然
JU Chun-yan;SUI Ran(School of Materials and Chemical Engineering,College of Technology and Engineering. LUT,Lanzhou 730050,China;School of Materials and Chemical Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China)
出处
《世界有色金属》
2019年第8期261-264,共4页
World Nonferrous Metals
基金
甘肃省高等学校科学研究项目(2016B-211)
兰州工业学院青年科技创新项目(19K-019)
关键词
冷金属过渡
镁-钛异种金属
润湿性
界面结构
cold metal transfer
magnesium-titanium dissimilar metal
wettability
interface structure
