TIG welding-brazing of special flux assisted aluminum-steel dissimilar alloys

被引：0
|
作者：
Song, Jianling [1 ]
Lin, Sanbao [1 ]
Yang, Chunli [1 ]
Ma, Guangchao [1 ]
机构：
[1] State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2010年 / 31卷 / 02期
关键词：
Aluminum alloys - Fillers - High speed cameras - Metals - Welds - Inert gas welding - Butt welding - Silicon alloys - Wetting - Brazing - Gas welding - Alloy steel - Tensile strength;
D O I：
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中图分类号：
学科分类号：
摘要：
The experiments of special flux assisted TIG welding-brazing for aluminum and steel dissimilar alloys was carried out by using Al-Si eutectic filler metal. The special flux applied to TIG heating was developed, the wetting and spreading behavior of liquid filler metal on the steel surface was observed by high-speed camera, and the typical TIG welding-brazing butt joint was analyzed. The results show the special flux can greatly promote the wetting and spreading of the filler metal on the steel surface, which the composition (mass fraction, %) is the modified Noclock flux (KAlF4: K3AlF6, 65:35) 55-78, Zn10-20, Sn10-20 and K2SiF62-5. With the action of special flux, the spreading behavior of liquid filler metal consists of two parts: one is to spread on the back face to pack the steel; the other is to uphill spread on the front face of the groove to form a sound brazed joint. A sound welding-brazing butt joint is obtained, which has a dual characteristic: in aluminum side it is a welding joint, and in steel side it is a brazing joint. The tensile strength of the butt joint reaches 115.5 MPa and the fracture occurs the interface of welded seam and the steel.
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页码：45 / 48
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