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Preparation process of aluminum oxide dispersion strengthened copper alloy

A dispersion-strengthened copper and preparation process technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of poor performance stability, complicated preparation process, long process, etc., achieve stable performance, simplify the preparation process, and reduce the sintering temperature Effect

Inactive Publication Date: 2019-08-30
中山麓科睿材科技有限公司
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AI Technical Summary

Problems solved by technology

The traditional preparation process of alumina dispersion-strengthened copper alloy mainly adopts internal oxidation method combined with cold and hot deformation processing technology. The main obstacle to the large-scale popularization and application of alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0016] A preparation process of aluminum oxide dispersion strengthened copper alloy, comprising the following steps:

[0017] Step 1: put the aluminum oxide dispersed copper alloy raw material powder into the ball milling equipment for ball milling treatment, and obtain the alloy powder with uniform distribution and good sintering performance;

[0018] Step 2: preparing the aluminum oxide dispersion strengthened copper alloy by hot pressing and sintering the raw material powder after ball milling in the step 1.

[0019] Further, the alumina-dispersed copper alloy raw material powder in step 1 is composed of alumina and copper, wherein the mass percentage of alumina is 0.10%-30.00%, and the balance is copper.

[0020] Further, the average grain size of the aluminum oxide dispersed copper alloy raw material powder in step 1 is 5-150um.

[0021] Further, the ball-to-material ratio in the ball milling treatment in step 1 is 10:1-10:8, and the ball milling time is 1-48 hours.

[...

Embodiment 1

[0024] A preparation of a dispersion-strengthened copper alloy with an alumina content of 0.20%: the average particle size of the powder is 10um aluminum oxide dispersed copper alloy powder for ball milling, the ball milling process is: the ball-to-material ratio is 10:1, and the ball milling time is 24 hours. The ball-milled alloy powder is hot-pressed and sintered. The hot-pressed sintering process is as follows: the degree of vacuum is 10 -1 MPa, the sintering pressure is 50MPa, the hot pressing temperature is 900°C, the heating rate is 10°C / min, the holding time is 30min, and then the temperature is cooled to room temperature to obtain alumina dispersion strengthened copper alloy. The density of the aluminum oxide dispersion strengthened copper alloy was determined to be 8.95g / cm 3 , the conductivity is 85% IACS, and the tensile strength at room temperature is 530MPa.

Embodiment 2

[0026] Preparation of a dispersion-strengthened copper alloy with an alumina content of 0.40%. Ball milling is carried out by using aluminum oxide dispersed copper alloy powder with an average particle size of 30um. The ball milling process is as follows: the ball-to-material ratio is 10:3, and the ball milling time is 36 hours. The alloy powder after ball milling is hot-pressed and sintered. The hot-pressed sintering process is as follows: the degree of vacuum is 10 -2 MPa, the sintering pressure is 70MPa, the hot pressing temperature is 930°C, the heating rate is 15°C / min, the holding time is 60min, and then the temperature is cooled to room temperature to obtain alumina dispersion strengthened copper alloy. The density of the aluminum oxide dispersion strengthened copper alloy was determined to be 8.94g / cm 3 , the conductivity is 83%IACS, and the tensile strength at room temperature is 550MPa.

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Abstract

The invention provides a preparation process of an aluminum oxide dispersion strengthened copper alloy and belongs to the field of nonferrous metal powder metallurgy materials. The preparation processspecifically comprises the following steps: S1, putting aluminum oxide dispersed copper alloy raw material powder in ball-milling equipment for ball-milling treatment; and S2, preparing the aluminumoxide dispersion strengthened copper alloy from the raw material powder after ball-milling treatment in the S1 through hot pressed sintering. By processing the aluminum oxide dispersed copper alloy powder by means of a ball-milling process, the uniformity and the sintering performance of the alloy powder are improved, so that the sintering temperature of the alloy is reduced and the densifying performance of the alloy is improved obviously. The aluminum oxide dispersion strengthened copper alloy which is high in density and good in mechanical property is obtained by hot pressed sintering. Theprocess method is simple, simplifies the preparation flow of the aluminum oxide dispersion strengthened copper alloy greatly, and is low in cost, stable in performance and quite suitable for scaled production.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal powder metallurgy materials, and in particular relates to a preparation process of high-strength and high-conductivity aluminum oxide dispersion-strengthened copper alloy. Background technique [0002] Alumina dispersion strengthened copper alloys have high strength, high electrical conductivity and excellent mechanical properties, and are widely used in electronic appliances, automobile manufacturing, high-speed trains, national defense and military industries and other fields. The traditional preparation process of alumina dispersion-strengthened copper alloy mainly adopts internal oxidation method combined with cold and hot deformation processing technology. The main obstacle to the large-scale promotion and application of alloys. Contents of the invention [0003] Aiming at the defects of the existing preparation technology, the present invention provides a preparation process of alumina di...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C9/00C22C32/00B22F1/00
CPCC22C1/05C22C1/0425C22C9/00C22C32/0021B22F1/14
Inventor 李达人
Owner 中山麓科睿材科技有限公司
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