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

A technology of copper alloy strip material and processing method, which is applied in the direction of metal rolling, rolling force/roll gap control, etc., can solve the problems of uneven distribution of precipitated phases, difficult comprehensive performance of products, and large work hardening rate, etc., to achieve improved Mechanical properties and electrical conductivity, improving utilization and yield, and solving the effect of reducing precipitated phases

Active Publication Date: 2020-01-24
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Preparation of C70250 copper alloy strip with a width of 100 mm and a thickness of 0.08 mm.

[0028] The down-draw hot continuous casting technology is used to prepare C70250 copper alloy strip billet with bright surface, dense structure, continuous columnar crystal structure along the continuous casting direction, width 100mm, and thickness 8mm; the copper alloy strip billet is directly processed at room temperature A cold rolling with a secondary deformation of 97.5%; a cold-rolled copper alloy strip is subjected to an aging treatment, the aging temperature is 450℃, the aging time is 30min, and the protective gas is argon; the primary aging copper alloy strip is at room temperature The second cold rolling with a deformation of 60% is carried out to obtain a C70250 copper alloy strip with a width of 100mm and a thickness of 0.08mm; then the second cold-rolled copper alloy strip is subjected to a secondary aging treatment, and the aging temperature is 400℃ , The...

Embodiment 2

[0029] Example 2: Preparation of a KFC copper alloy strip with a width of 40 mm and a thickness of 0.16 mm.

[0030] The up-draw warm continuous casting technology is used to prepare KFC copper alloy strip blanks with smooth surface, dense structure, columnar crystal structure with high orientation along the continuous casting direction, width 40mm, thickness 4mm; direct copper alloy strip blanks at room temperature Perform a cold rolling with a pass deformation of 90%; a cold-rolled copper alloy strip is subjected to an aging treatment, the aging temperature is 470℃, the aging time is 50min, and the protective gas is argon; the primary aging copper alloy strip Perform secondary cold rolling with a pass deformation of 60% at room temperature to obtain a KFC copper alloy strip with a width of 40mm and a thickness of 0.16mm; then the secondary cold-rolled copper alloy strip is subjected to secondary aging treatment, and the aging temperature is 400℃, the aging time is 10min, and th...

Embodiment 3

[0031] Example 3: Preparation of C18150 copper alloy strip with a width of 80 mm and a thickness of 0.1 mm.

[0032] The horizontal warm continuous casting technology is used to prepare C18150 copper alloy strip blanks with smooth surface, dense structure, columnar crystal structure with high orientation along the continuous casting direction, width 80mm, thickness 8mm; copper alloy strip blanks are directly processed at room temperature One cold rolling with a pass deformation of 90%; one cold-rolled copper alloy strip is subjected to an aging treatment, the aging temperature is 460℃, the aging time is 40min, and the protective gas is argon; the one-time aging copper alloy strip is Perform secondary cold rolling with a pass deformation of 87.5% at room temperature to obtain a C18150 copper alloy strip with a width of 80 mm and a thickness of 0.1 mm; then the secondary cold rolled copper alloy strip is subjected to secondary aging treatment, and the aging temperature is 420 ℃, th...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08C22C9/00C22C9/06C22F1/02B21B3/00B21B37/58
CPCB21B3/00B21B37/58B21B2003/005C22C9/00C22C9/06C22F1/02C22F1/08
Inventor 刘雪峰廖万能杨耀华
Owner UNIV OF SCI & TECH BEIJING
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