冷金属过渡条件下4043铝合金分别在镀锌钢和镀锡钢表面的润湿行为  

Wetting Behavior of 4043 Aluminum Alloy on Zn-coated andSn-coated Steels Under Cold Metal Transfer Condition

作　　者：隋然 刘禄 林巧力[2] SUI Ran;LIU Lu;LIN Qiaoli(Department of Materials Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州工业学院材料工程学院,兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050

出　　处：《材料导报》2022年第15期118-122,共5页Materials Reports

基　　金：国家自然科学基金(52165044);兰州工业学院“启智”人才培养项目(2020QZ-06);甘肃省教育厅创新基金项目(2021B-308);甘肃省高等学校产业支持项目(2020C-30);甘肃省级重点人才项目“机械装备绿色再制造表面工程创新人才团队建设项目”。

摘　　要：在铝/钢冷金属过渡熔钎焊连接中,钢表面的金属镀层是保证铝-钢润湿的关键。在冷金属过渡条件下,本工作对比研究了4043铝合金在镀锌钢和镀锡钢的润湿行为。当钢表面存在低熔点的金属镀层时,改善它们之间的润湿性至少涉及两个方面:(1)通过暴露具有较高表面能的表面增加固体的表面能;(2)通过将金属镀层合金化减小液体的表面张力。锌镀层的作用是通过锌的挥发降低界面热量(至少耗散5.1%的热量),从而控制金属间化合物层的厚度。在低热输入条件下,锡镀层的作用是使体系具有更好的润湿性。The metallic coating on the steel surface is the key to ensure the wetting of aluminum/steel in the cold metal transfer welding process.The wetting of 4043 aluminum alloy on galvanized steel and tin-plated steel was studied under the cold metal transfer conditions.When there is a metallic coating with a low melting point on the steel surface,the wettability improvement involves at least two aspects:(i)increasing the surface energy of the solid by exposing the surface with a higher surface energy;(ii)reducing the surface tension of the liquid by alloying the metal coating.The effect of the zinc coating is to reduce the interfacial heat(at least 5.1%heat dissipation)through the volatilization of zinc,thereby limiting the thickness of the intermetallic compound layer.Under the condition of low heat input,the effect of tin coating makes the system have better wettability.

关 键 词：润湿性 连接 钎焊 冷金属过渡(CMT) 

分 类 号：TG454[金属学及工艺—焊接]