Preparation method of aluminum oxide dispersion-strengthened copper-based diffusion alloy powder

A technology for dispersion strengthening of copper and diffusion alloys is applied in the preparation of copper-based diffusion alloy powder and the preparation of alumina dispersion-strengthened copper-based diffusion alloy powder. The effect of small deformation and excellent strength
CN109530705AInactive Publication Date: 2019-03-29GUANGDONG INST OF MATERIALS & PROCESSING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG INST OF MATERIALS & PROCESSING
Publication Date
2019-03-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method of aluminum oxide dispersion-strengthened copper-based diffusion alloy powder. The preparation method comprises the following steps of: (1) weighing luminumoxide dispersion-strengthened copper powder of which the particle size is smaller than 75 microns and metal powder of which the particle size is smaller than 45 microns according to a mass ratio, andmixing for 4 h to 8 h; (2) processing the mixed powder for 0.5 h to 4 h at the temperature of 600 DEG C to 900 DEG C in hydrogen atmosphere; (3) crushing the obtained material until the particle sizeof the material is smaller than or equal to 180 microns, and screening the material to form powder which is within four different particle size ranges including 180-150 microns, 15-75 microns, 75-45microns and smaller than 45 microns; and (4) processing the powder for 1 h to 3 h at the temperature of 450 DEG C to 650 DEG C in the hydrogen atmosphere, cooling to room temperature to obtain the aluminum oxide dispersion-strengthened copper-based diffusion alloy powder, and finally carrying out vacuum packaging. The invention provides a preparation method of the aluminum oxide dispersion-strengthened copper-based diffusion alloy powder which is uniform in components and controllable in particle size, apparent density and fluidity, and the aluminum oxide dispersion-strengthened copper-based diffusion alloy powder can meet various application requirements of oil bearings, diamond tools, friction materials and the like.
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Description

technical field

[0001] The invention relates to a method for preparing copper-based diffusion alloy powder, in particular to a method for preparing aluminum oxide dispersion-strengthened copper-based diffusion alloy powder, and belongs to the technical field of powder metallurgy. Background technique

[0002] As an important industrial metal, copper is widely used in industries such as oil-impregnated bearings, diamond tools, and friction materials. In these typical applications, there are usually relatively high comprehensive requirements for material strength, hardness, wear resistance and thermal conductivity. Dispersion strengthening is an effective means to increase the strength of alloys. Alumina has the characteristics of high melting point, good thermal stability at high temperature, and high elastic modulus. It is a commonly used dispersion strengthening phase, especially when it has achieved remarkable results in strengthening copper alloys. Aluminum oxide disper...

Claims

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