Trans. Nonferrous Met. Soc. China
Vol. 13  No. 4            (Sum 55)           Aug. 2003

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

YIN Zhi-min(ÒüÖ¾Ãñ), GUO Fei-yue(¹ù·ÉÔ¾),
PAN Qing-lin(ÅËÇàÁÖ), SONG Lian-peng(ËÎÁ·Åô)
ª¤(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
CLC number:TG146.2ª¤
Document code: A

Foundation item: Project (G1999064911) supported by the National Key Fundamental Research and Development Program of China
Received date: 2003-01-15; Accepted date: 2003-04-20ª¤
Correspondence:YIN Zhi-min, Professor, PhD; Tel: +86-731-8830262; E-mail: yin-grp@mail.csu.edu.cn ª¤ª¤