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Single-phase nanometer aluminium oxide particle dispersion strengthened copper alloy and preparation method thereof

A technology of particle dispersion strengthening and nano-alumina, which is applied in the field of copper alloy powder metallurgy powder making, can solve the problems of strengthening phase control and non-discovery, and achieve the effect of improving comprehensive performance and high production efficiency

Active Publication Date: 2018-01-09
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic and foreign patents do not address the strengthening phase Al 2 o 3 control the phase structure of
Al 2 o 3 Related reports on particle phase composition

Method used

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  • Single-phase nanometer aluminium oxide particle dispersion strengthened copper alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A single-phase nano-alumina particle dispersion-strengthened copper alloy rod, the preparation process of which comprises the following steps:

[0039] (1) Raw material preparation: Cu-Al alloy powder produced by water atomization or nitrogen atomization, screening powder below 80 mesh as raw material, Al content is 0.6wt%, particle size is -80 mesh;

[0040] (2) liquid phase reaction synthesis: get 20 kilograms of raw material powders in step (1), place in agitating ball mill, add 40 liters of deionized water and 80 kilograms of pure copper balls of diameter 6mm, ball milling process is intermittent ball milling process, ball milling Stop the machine for 30 minutes after 3 hours, and the cumulative ball milling time is 36 hours. Calculate H according to the aluminum content added to the Cu-Al alloy powder 2 o 2 The amount used is divided into 10 parts and added to the stirring ball mill in 10 times during shutdown. After the ball milling process is completed, use a ...

Embodiment 2

[0047] A single-phase nano-alumina particle dispersion-strengthened copper alloy rod, the preparation process of which comprises the following steps:

[0048] (1) Raw material preparation: Cu-Al alloy powder produced by water atomization or nitrogen atomization, screening powder below 80 mesh as raw material, Al content is 0.1wt%, particle size is -80 mesh;

[0049] (2) Liquid-phase reaction synthesis: get 20 kilograms of raw material powder in step (1), place in the roller ball mill, add 50 liters of deionized water and 200 kilograms of pure copper balls with a diameter of 5mm, the ball milling process is an intermittent ball milling process, ball milling Stop for 30 minutes after 6 hours, and the cumulative ball milling time is 72 hours. According to the aluminum content added to the Cu-Al alloy powder, the usage amount of the ozone aqueous solution was calculated, divided into 10 parts and added to the stirring ball mill in 10 times during shutdown. After the ball milling ...

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Abstract

The invention belongs to the field of powdering of powder metallurgy and particularly relates to single-phase nanometer aluminium oxide particle dispersion strengthened copper alloy and a preparationmethod thereof. An oxidant contains 0.2-2.4 wt% (mass percent) of Al2O3 and more than or equal to 95% of gamma-Al2O3, and the average grain size D of gamma-Al2O3 is smaller than 30 nm. The preparationmethod is characterized in that water-atomized or nitrogen-atomized Cu-Al alloy powder is taken as a raw material, and liquid-phase reaction synthesis, nitrogen drying, pressing, compacting, refiningand other procedures are performed to obtain the single-phase nanometer aluminium oxide particle dispersion strengthened copper alloy with excellent comprehensive performance. In combination with liquid-phase medium oxygen supply and in-situ reaction synthetic phase, a novel 'self-adaptive' liquid-phase original reaction synthesis technology is developed. Compared with the prior art, the single-phase nanometer aluminium oxide particle dispersion strengthened copper alloy and the preparation method thereof have the advantages of short production flow, simple process, stable material performance and the like, and are of great significance on widening application and development of the copper alloy in the high-end technical field and perfecting the preparation process and principle of the dispersion strengthened copper alloy.

Description

technical field [0001] The invention belongs to the field of copper alloy powder metallurgy powder making, and relates to a single-phase nano-alumina particle dispersion-strengthened copper alloy and a preparation method thereof. technical background [0002] Dispersion strengthened copper alloy is a kind of copper alloy material formed by uniformly dispersing ceramic particles with high melting point, high hardness, good thermal stability and chemical stability in the copper matrix. Compared with other strengthening methods, the strengthening particles of dispersion strengthening do not dissolve and grow at high temperature, and have a strong hindering effect on dislocation movement and grain boundary migration, which significantly improves the strength and high temperature softening resistance of the material. At the same time, the effect of particles on free electron scattering is small, so the conductivity of the copper matrix will not be significantly reduced. Dispersi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05
Inventor 李增德李卿
Owner GRIMAT ENG INST CO LTD