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

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Transactions of Nonferrous Metals Society of China

Vol. 22    No. 2    December 2012

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Cold-pressing deformation characteristics of steel-aluminum sheets joining
LI Feng1, LIN Jun-feng2, SUI Xiao-chong1, BIAN Nan1, XU Ming-da3

1. College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China;
2. National Key Laboratory for Precision Hot Processing of Metals,
Harbin Institute of Technology, Harbin 150001, China;
3. Physics Department, Qiqihaer Normal College, Qiqihaer 161006, China

Abstract:In order to overcome the deficiencies of the traditional connection of dissimilar sheet metals, a new method “cold-pressing deformation joining” was proposed. By using finite element simulation software DEFORMTM-3D, the joining process of the pure aluminium and stainless steel was simulated while the sample size is 100 mm×30 mm and the thicknesses are 1 mm and 0.5 mm, respectively. The results indicate that the punching load presents an increasing trend with the increase of the punch downward displacements. The thickness of stainless steel sheet decreases gradually from the centre to the two sides in the process. In contrast, the thickness of aluminum sheet changes a lot. Experimental scheme and simulation are in good agreement. The unidirectional tensile test demonstrates that with the increase of punch downward displacements, the average thickness of connection area decreases while the connection strength increases before decreasing. The thicknesses in gauge length of connection are not uniformly distributed and the position 15 mm away from the aluminum end shows the largest thickness.


Key words: cold-pressing joining method; dissimilar sheet metal; unidirectional tensile test; thickness distribution; connection strength

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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