| METALS AND METAL MATRIX COMPOSITES |
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| Wetting Behavior of 4043 Aluminum Alloy on Zn-coated and Sn-coated Steels Under Cold Metal Transfer Condition |
| SUI Ran1, LIU Lu2, LIN Qiaoli2,*
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1 Department of Materials Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China
2 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China |
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Abstract 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.
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Published: 10 August 2022
Online: 2022-08-15
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| Fund:National Natural Science Foundation of China (52165044), the ‘Qizhi’ Talent Cultivation Project of Lanzhou Institute of Technology (2020QZ-06), Innovation Fund of Education Department of Gansu Province(2021B-308), Industry Support Project of Colleges and Universities in Gansu Province (2020C-30),and Gansu Provincial Key Talent Project ‘Mechanical Equipment Green Remanufacturing Surface Engineering Innovation Talent Team Construction Project’. |
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2022, Vol. 36 
