Method for preparing alumina dispersion-strenghtened copper-base composite material

Abstract

The invention discloses a method to make alumina dispersion strengthening copper base composite material that includes the following steps: making copper-aluminum prealloying powder through high energy ball milling method, making the composite powder of copper plating powder and copper-aluminum prealloying powder through high energy ball milling method; cold press molding the powder, taking sintering and internal operation in vacuum furnace, after two times of hot extrusion, the material would be gained. The method has the advantages of simple technology, low cost, etc.

Description

technical field

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

[0002] Precipitation-hardening copper alloys (Cu-Cr, Cu-Cr-Zr, etc.) Copper alloy has high strength, good electrical and thermal conductivity. However, the disadvantage of these alloys is that if the use temperature is higher than the original precipitation heat treatment temperature (1 / 3 to 1 / 2 of the copper melting point) for a long time, the strength and electrical and thermal conductivity of the copper alloy will be greatly reduced, and the actual parts of these parts The working temperature often exceeds this temperature range, which leads to a sharp reduction in the service life of materials and a decrease in the stability of instruments and equipment. Therefore, it is urgent to develop a material with high strength and...

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