Copper-aluminium bilayer structure composite thin belt and preparation method thereof

Abstract

The invention relates to a copper-aluminium bilayer structure composite thin belt and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: carrying out ordered superposition through enabling the polishing surface of to-be-rolled copper material to be upwards and enabling the polishing surface of to-be-rolled aluminium material to bedownwards, loading the ordered superposed bilayer structure copper-aluminium superposed material in a composite rolling guiding system, and adopting a double-roller rolling mill for composite rollingto obtain copper-aluminium bilayer structure composite strip; placing the copper-aluminium bilayer structure composite strip in a vacuum bell type annealing furnace, carrying out thermal insulation for 24-36 hours at the temperature of 565-675 DEG C, and adopting a 16-roller multi-roll rolling mill to carry out three-pass reversible rolling with front-back tension to manufacture the copper-aluminium bilayer structure composite thin belt. The preparation method has the characteristics of being simple in technology, short in production period and low in preparation cost, the prepared copper-aluminium bilayer structure composite thin belt is high in strength, excellent in toughness, large in strength of bonding interface, high in precision and excellent in strip shape, more than 70% of copper is saved, and the effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of metal double-layer structure composite strips. In particular, it relates to a copper-aluminum double-layer structure composite thin strip and a preparation method thereof. Background technique [0002] my country's copper resources are relatively poor, and aluminum resources are relatively abundant. The copper materials used in the energy and electronic communication fields mainly transmit high-frequency current on the surface during use, which makes the copper materials in the core part seem extravagant and wasteful. The multi-layer composite material does not affect the use surface of copper, but also has the properties of copper and aluminum, and can save a lot of scarce copper resources, so that it can be used in other places where it is more needed. Therefore, the application of copper-aluminum composite materials and their preparation methods are the inevitable requirements of rapid social and econo...

AI Technical Summary

Problems solved by technology

"A copper / aluminum composite strip and its preparation method" (201510092152.3) patented technology, the copper-aluminum bimetallic composite material produced is not enough in saving copper and aluminum raw materials, and the thickness control of the finished product is also insufficient, which limits the Its use in the field of precision electronic devices; "A preparation method for rolling ultra-thin layered copper-aluminum composite foil" (201910623010.3) patented technology, which produces an extremely thin-layered copper-aluminum composite foil, and the interface is bonded when composited The formation is mainly mechanical meshing, although there is a certain control in the thickness of the foil, the surface shape and plate shape of the obtained foil and the strength of the bonding interface are still insufficient.