Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    No. 2    December 2012

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Magnetic pulse joining of aluminum alloy-carbon steel tubes
YU Hai-ping1, 2, XU Zhi-dan1, JIANG Hong-wei1, ZHAO Zhi-xue1, LI Chun-feng1

1. National Key Laboratory for Precision Hot Processing of Metals, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2. State Key Laboratory of Advanced Welding and Joining, School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China

Abstract:The magnetic pulse joining (MPJ) between 3A21 aluminum alloy and steel 20 tubes was experimentally investigated with a solenoid coil assisted by a field shaper. The mechanical properties and microstructure of MPJ joints were tested and observed. The results show that the metallurgical joints can be obtained at a voltage of 15 kV, a radial gap of 1.2-1.4 mm, and a slope angle of 3°-7° in the lapping area. The joint comprises a transition zone with different widths, two matrix metals and two interfaces between the zone and the two metals. The interface presents a typical wavy pattern and mutual diffusion of Fe and Al elements happens in the zone. The transition zone is composed of Fe-Al intermetallics, micro cracks and micro pores. The microhardness of the transition zone is much higher than that of the matrix metals.

 

Key words: magnetic pulse joining; dissimilar metals; metallurgical joint; field shaper; aluminum; steel

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

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

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