Interfacial structure and joint strengthening in arc brazed galvanized steels with copper based filler

被引：16
作者：
Li, RF [1 ]
Yu, ZS
Qi, K
机构：
[1] Jiangsu Univ Sci & Technol, Prov Key Lab Adv Welding Technol, Zhenjiang 212003, Peoples R China
[2] Shanghai Univ Engn Sci, Coll Mat Engn, Shanghai 200336, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2006年 / 16卷 / 02期
基金：
中国国家自然科学基金;
关键词：
galvanized steels; CUSi3; TIG; MIG; arc brazing; strengthening mechanism; interfacial structure;
D O I：
10.1016/S1003-6326(06)60068-X
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Galvanized steel sheets were joined by tungsten inert gas(TIG) and metal inert gas(MIG) brazing process using copper based filler. The results show that the joint zone hardness is higher than that of the base material or copper filler from the microhardness tests of TIG brazing specimens, and the fracture spot is at the base materials zone from the tensile tests of MIG brazing specimens. Examination using energy dispersive X-ray analysis reveals the presence of intermetallic compound Fe5Si3(Cu) in the joint. The dispersal of fine Fe5Si3(Cu) particles is the main strengthening factor for the joint. The Fe5Si3(Cu) particles are determined to arise from three sources, namely, spot micro-melt, whisker-like fragmentation and dissolve-separation actions.
引用
收藏
页码：397 / 401
页数：5
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