Preparation and processing method of high-strength and high-conductivity copper alloy strip

Abstract

The invention discloses a preparation and processing method of a high-strength and high-conductivity copper alloy strip, and belongs to the technical field of metal material preparation and processing. A copper alloy strip blank with excellent surface quality, compact structure and columnar crystal structure with high orientation degree in the continuous casting direction is produced by adopting atemperature control casting mold continuous casting technology; the procedures of homogenizing annealing and solid solution treatment are cancelled; and repeated single-pass large-deformation cold rolling and aging treatment are directly carried out to obtain the high-quality and high-performance copper alloy strip with excellent mechanical property and conductivity. The preparation and processing method has the advantages that the preparation and processing process flow of the copper alloy strip is short, the fine, dispersed and multi-scale mixed uniform distribution of the precipitated phase of the copper alloy strip can be promoted, the precipitated phase can be more fully precipitated, the solid solution of alloy elements in a matrix is reduced, and the copper alloy strip with a continuous fiber strip-shaped structure in the length direction and excellent comprehensive performance is obtained.

Description

Technical field [0001] The invention belongs to the technical field of metal material preparation and processing, and specifically relates to a preparation and processing method of a high-strength and high-conductivity copper alloy strip. Background technique [0002] With the rapid development of electronic information technology and other fields, the development of conductive parts to low cost, high performance and high reliability is promoted. This is the use of copper alloy tape for conductive parts (such as lead frames or connectors). Materials (such as Cu-Fe-P, Cu-Ni-Si and Cu-Cr-Zr) put forward higher requirements, not only hope that the copper alloy strip preparation and processing process will be shorter, but also require higher strength And electrical conductivity. [0003] At present, there are mainly three traditional preparation and processing techniques for copper alloy strips: one is "cold semi-continuous casting slab-homogenization annealing-hot rolling-solid solut...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of excessive solid solution of alloying elements in the matrix in the existing copper alloy strip production method, high work hardening rate, insufficient aging precipitation, relatively single size of precipitated phase and insufficient dispersion distribution, and uneven distribution of precipitated phases And it is easy to grow, the process is long, and the comprehensive performance of the product is difficult to meet the continuously improving use requirements. A preparation and processing method for high-strength and high-conductivity copper alloy strip is provided.

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