Process for preparing copper-clad aluminum laminated busbar

Abstract

The invention provides a process for preparing a copper-clad aluminum laminated busbar. Aluminum on a core part and copper in a clad layer are compounded into a copper-clad aluminum compound body first, and the ratio of the area of copper-clad layer is 15 to 50 percent; and the preparation process comprises the following steps: (1) drawing; (2) rolling; (3) drawing; (4) performing finish rolling process; (5) annealing; and (6) drawing, wherein the drawing speed is 2 to 35m / min, and the reduction of the area of a single pass is 4 to 18 percent until the size of the busbar is qualified. The preparation process has the advantages that: the first-pass process of the invention is the drawing process in which the pass of a drawing die is designed and the die is assembled independently; because the clad materials subjected to drawing are combined well, the cracking phenomenon of the copper-clad layer is avoided in the process of cogging, and the combination between the aluminum and the copper is strengthened; therefore, the prepared copper-clad aluminum laminated busbar has a smooth surface and high dimension precision, and the mechanical property meeting related requirements; the preparation process is high in efficiency and wide in promotion; and by designing the process flow, the drawing die and the rolling pass reasonably, the problem that the clad materials are difficult to be subjected to pressure processing is solved.

Description

technical field [0001] The invention belongs to the field of bimetallic composite materials, and in particular relates to a preparation process of a copper-clad aluminum composite busbar. Background technique [0002] The copper-clad aluminum composite busbar is made of core aluminum and cladding layer copper. The blank is made by horizontal continuous casting direct composite forming technology. The patent No. 200810057668 discloses "a high-performance copper-clad aluminum rectangular cross-section Surface Composite Conductive Busbar and Its Preparation Process", the process steps are: use horizontal continuous casting to directly compound the copper-clad aluminum composite billet; roll the copper-clad aluminum billet according to the need Roll flat roll rolling; when the total relative reduction of multi-pass rolling reaches 70% to 90%, low-temperature intermediate annealing is performed on the copper-clad aluminum composite conductive busbar; the annealed composite conduc...

AI Technical Summary

Problems solved by technology

In this processing technology, the deformation is not well controlled when the billet is opened, and the cladding layer is easily broken. Improper equipment configuration and process in subsequent processing will lead to cracking of the copper cladding layer, damage to the copper-aluminum bond, and thickness of the cladding layer on the side of the busbar and the plane. There are defects such as differences

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