Explosive welding method for improving bonding strength of aluminum-carbon steel composite material

Abstract

An explosive welding method for improving the bonding strength of an aluminum-carbon steel composite material comprises the steps of respectively conducting surface polishing on the explosive welding faces of a carbon steel base layer (2), a carbon steel middle thin layer (4) and an aluminum composite layer (5), horizontally arranging the base layer on a foundation (1), arranging the upper end face of the base layer on the carbon steel middle thin layer through supporting of superposed copper pieces (3), forming a separation distance S2 between the middle thin layer and the base layer, arranging the composite layer on the upper end face of the middle thin layer through supporting of the superposed copper pieces, forming a separation distance S1 between the composite layer and the middle thin layer, finally laying explosive (6) with density of 0.5-0.8 g / cm<2> and thickness H on the upper end face of the composite layer and burying detonators (7), wherein the detonation speed is controlled to be 2000-2600 m / s, the composite layer can sequentially bumps the middle thin layer and the base layer through one-time explosive welding, the three-layer integrated aluminum-carbon steel composite material is formed, heat energy consumption is obviously reduced, a melting phenomenon does not occur, and the interface bonding strength is improved.

Description

technical field [0001] The invention belongs to the technical field of explosive materials, and in particular relates to an explosive welding method for improving the interface bonding strength of aluminum-carbon steel composite materials in the electrolytic aluminum industry. Background technique [0002] In the electrolytic aluminum industry, in order to meet the connection requirements of aluminum guide rods and carbon steel, it is necessary to use aluminum-steel composite materials to make transition joints produced by electrolytic aluminum instead of crimping, riveting, cladding or bolting. transition joints. [0003] At present, aluminum-steel composite materials for electrolytic aluminum are mainly manufactured by explosive welding. However, due to the thicker aluminum layer, in order to obtain better interface bonding strength, the thinner pure aluminum is generally used as the middle layer and the explosion is carried out twice. Welding, that is, the 3-4mm thi...

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Problems solved by technology

[0003] At present, aluminum-steel composite materials for electrolytic aluminum are mainly manufactured by explosive welding. However, due to the thicker aluminum layer, in order to obtain better interface bonding strength, the thinner pure aluminum is generally used as the middle layer and the explosion is carried out twice. Welding, that is, the 3-4mm thick pure aluminum intermediate layer is explosively welded to the steel plate, and then the 8-12mm thick pure aluminum clad layer is explosively welded to the intermediate layer. There is a certain thickness of the molten layer at the aluminum-steel bonding interface. It affects the strength of its bonding interface, especially the transition joint made of aluminum-steel composite material is more serious when the working temperature of electrolytic aluminum is >300 ° C, and even the phenomenon of aluminum-steel interface detachment occurs

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