Al-Cu based welding wire with minor Sc-Zr alloying and its application

ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 13 No. 4 August 2003

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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

Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
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