Improvement of Bonding Strength of Horizontal Twin-Roll Cast Steel/Aluminum Clad Sheet by Electromagnetic Fields

Gang Chen¹，Jin-Tao Li^1,2，Guang-Ming Xu¹

1. Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education), Northeastern University2. School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong

摘 要：Electromagnetic field is an available online method to increase bonding strength of clad sheet manufactured by horizontal twin-roll casting（HTRC）. In this paper, an electric current pulse（ECP） and a complex field（static magnetic field（SMF） together with ECP） are exerted during HTRC of steel/aluminum clad sheet. The produced clad sheet has good appearance, and no visible defects exist at the bonding interface. The inter-diffusion zone at Fe/Al interface in ECP and SMF+ECP sheets is 3 and 4 lm, respectively, and the latter increases slightly compared with that in non-field sheet. The average peel strengths（APS） of ECP and SMF+ECP sheet are 14 and 21 N/mm, respectively, which increase by 2 and9 N/mm compared with 12 N/mm of non-field sheet. The APS increment in SMF+ECP sheet is resulted from the increment of interface bonding spots and the enhancement of inter-diffusion zone width.

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