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YANG Jinlong, XUE Songbai, XUE Peng, DAI Wei, LV Zhaoping, ZHANG Man. Microstructure and mechanical properties of aluminum/stainless steel brazed joint with torch brazing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(1): 63-66.
Citation: YANG Jinlong, XUE Songbai, XUE Peng, DAI Wei, LV Zhaoping, ZHANG Man. Microstructure and mechanical properties of aluminum/stainless steel brazed joint with torch brazing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(1): 63-66.

Microstructure and mechanical properties of aluminum/stainless steel brazed joint with torch brazing

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  • Received Date: October 08, 2014
  • The wettability, microstructure, intermetallic compound (IMC) layer and mechanical properties of aluminum/stainless steel joints brazed with Zn-xAl filler metals were investigated by means of scanning electron microscope, energy dispersive X-ray spectrometer and X-ray diffraction. The results indicate that the oxide film on the base metal could be effectively removed by the modified CsF-RbF-AlF3 flux, and the excellent mechanical properties of the brazed joints were obtained. The spreading area as well as the clearance filling ability of Zn-xAl filler metal was both improved with by increasing the content of Al in the filler metals. However, the shear strength of the joint increased first and decreased afterwards, and the best mechanical property of brazed joint is obtained when the content of Al is 15%. It has been found that when the content of Al is low, the interfacial layer is composed of Zn-rich and Fe4Al13 phase. As for the excessive amount of Al, additional Fe2Al5 phase is visible at the interface.
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