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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 4    August 2003

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Al-Cu based welding wire with minor Sc-Zr alloying and its application
YIN Zhi-min(尹志民), GUO Fei-yue(郭飞跃),
PAN Qing-lin(潘青林), SONG Lian-peng(宋练鹏)

School of Materials Science and Engineering, Central South University, Changsha 410083, China

Abstract:A kind of Al-Cu-(Sc, Zr, Mn, Ti, V, B) welding wire was developed by adding minor Sc, Zr, Mn, V, B, and was used for welding 2195 aluminum alloy plate with a thickness of 2mm. Mechanical properties and microstructure of welding wire and welding joint were studied. The results show that strength coefficient of the welding joint is 0.70 and the weakest area lies in the softened zone of HAZ. It is indicated that this welding wire adding minor Sc, Zr, Mn, V, B is an ideal welding wire for 2195 Al-Li alloy plate. The high strength of the weld comes from grain-refining strengthening and precipitation strengthening of Al2Cu, Al3Sc and Al3Zr.

 

Key words:  2195 aluminum alloy; Sc; welding joint; microstructure; mechanical properties

ISSN 1672-7029
CN 43-1423/U

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