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High-intensity high-conductivity copper alloy and its preparation method

A high conductivity, copper alloy technology, applied in the field of metal material engineering, can solve difficult problems, achieve high strength and conductivity, and simplify the processing technology

Inactive Publication Date: 2009-07-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper strength σ obtained by alloying method b Between 350 and 650 MPa, the electrical conductivity of the copper material prepared by alloying can be as high as 60-90% IACS, but it is difficult to make the two have larger values ​​at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Taking copper as the matrix, the components added to the copper are 0.1% silver, 0.41% chromium, and 0.05% cerium according to the percentage of the total weight. It is smelted at 1230°C for 0.5 hours in the atmosphere.

[0014] After the alloy has been solution treated (900°C, 120min). Rolling plastic deformation is 30% at room temperature.

[0015] After aging treatment at 480° C. for 1.5 hours, 30% cold deformation processing was performed at room temperature. The strength of the alloy can reach 570-620MPa. The elongation is not less than 5%, while the electrical conductivity is 80% IACS.

Embodiment 2

[0017] Taking copper as the matrix, the components added to the copper are 0.14% silver, 0.52% chromium, and 0.07% lanthanum according to the percentage of the total weight. The melting temperature is in the range of 1200 ° C and the melting time is 1 hour in the atmosphere.

[0018] The alloy undergoes solution treatment (880°C, 150min), and plastic deformation is 35% at room temperature.

[0019] After aging treatment at 430°C for 2 hours, 35% cold deformation processing was performed at room temperature. The strength of the alloy can reach 575-630MPa. The elongation is not less than 5%, while the electrical conductivity is 79% IACS.

Embodiment 3

[0021] With copper as the matrix, the components added to the copper are 0.07% silver, 0.55% chromium, 0.03% cerium, and 0.02% lanthanum according to the percentage of the total weight. The melting temperature is 1270 ° C and the time is 1.5 Hours of atmospheric smelting.

[0022] The plastic deformation of the alloy is 45% at room temperature after solution treatment (950°C, 150min).

[0023] After aging treatment at 450° C. for 1.5 hours, 30% cold deformation processing was performed at room temperature. The strength of the alloy can reach 590-640MPa. The elongation is not less than 5%, while the electrical conductivity is 78% IACS.

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PUM

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Abstract

The invention discloses a high-strength and high-conductivity copper alloy, which comprises copper, silver, chromium, and mixed rare earth elements, and the percentages according to the total weight are: silver 0.05%-0.15%, chromium 0.42%-0.64%, mixed rare earth elements Re 0 -0.09%, the rest is copper, mixed rare earth elements refer to cerium, yttrium, lanthanum, samarium elements. Copper alloys with high strength (570-650MPa), high conductivity (75-80%IACS) are obtained through smelting and cold working techniques. The strength of the alloy reaches 570-650MPa, the elongation is not less than 5%, and the electrical conductivity is 75-80%IACS.

Description

technical field [0001] The invention relates to the field of metal material engineering, in particular to a high-strength and high-conductivity copper alloy. Background technique [0002] High-strength and high-conductivity copper alloy is a high-performance metal material with excellent comprehensive physical properties and mechanical properties. It also has structural and functional properties. It is widely used in electric power, electronics, electrical, machinery and other industrial industries. Continuous casting machine mold lining, integrated circuit lead frame, high-power asynchronous traction motor rotor, electrified railway contact wire (tram line), thermonuclear experimental reactor (ITER) divertor vertical target heat sink, high pulse magnetic field conductor material, etc. [0003] High strength and high conductivity are a pair of contradictions, but in some high-tech fields, materials are required to have high strength and high conductivity at the same time. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/02C22F1/08
Inventor 郑茂盛徐长征
Owner XI AN JIAOTONG UNIV