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Research on Cold-rolled Bimetal of High-tin Aluminum Alloy and Steel

By Guoming Cui, Xingxia Li and Jianmin Zeng


Abstract. Bimetal of high-tin aluminum alloy and steel was fabricated by cold-rolling process; microstructure, bonding strength and bonding mechanism for bonding interface of the bimetal were investigated under cold-rolling and recrystallization annealing state, respectively. Experimental results indicate that tin phase of bimetal in cold-rolling state shows a belt type distribution, however, it, in recrystallization annealing state, is uniformly distributed just like some “isolated islands”. A well bonding interface, between layers of high–tin aluminum alloy and pure aluminum, can be obtained, and it is difficult to distinguish one layer from the other; but the interface, between layers of low-carbon steel back and pure aluminum, is clear and uneven. And meanwhile, bonding mechanism of bimetal interface, in cold-rolling state, is cold pressure welding and mechanical occluding, But it, in recrystallization annealing state, is cold pressure welding, mechanical occluding, and metallurgic bonding. After recrystallization annealing, at 350 ℃ for 2h,the bonding strength of bimetal approaches to 92.4MPa, which is about 26 % higher than that of cold-rolling state

Topics: high-tin aluminum alloy, bimetal, bearing, cold-rolling
Year: 2016
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