Preparation process of external oxidation dispersion strengthened copper alloy

Abstract

The invention relates to a preparation process of an external oxidation dispersion strengthened copper alloy. The preparation process comprises the following steps: proportioning and smelting metallic copper and metallic aluminium, and controlling the temperature of a smelting furnace to be 1,250-1,300 DEG C; performing continuous casting on a smelted copper aluminium alloy, and controlling the temperature of cooling water of a casting crystallizer to obtain an oxygen-containing alloy copper bar; repeatedly and continuously extruding the oxygen-containing alloy copper bar in a closed extrusion cavity by use of a continuous extruder to obtain a uniform-ingredient alloy copper bar; and then performing high-temperature aging treatment, enabling sufficient replacement reaction in a protective gas to ensure generation of Al2O3, performing cold-drawing treatment to obtain a dispersion strengthened copper alloy, and eliminating unqualified products to obtain a finished Al2O3 dispersion strengthened copper alloy. The preparation process of the dispersion strengthened copper alloy is shortened in flow and low in cost, the obtained copper alloy product is stable in quality and excellent in performance, the demand of the society for the high-strength and high-conductivity dispersion strengthened copper alloy is satisfied, the preparation process can be conveniently popularized in more fields, and the economic efficiency and the practicability are high.

Description

technical field [0001] The invention belongs to the technical field of copper alloy processing in the nonferrous metal industry, and in particular relates to a preparation process of external oxidation dispersion strengthened copper alloy. Background technique [0002] At present, the two most commonly used methods for producing alumina dispersion-strengthened copper alloys are internal oxidation and mechanical alloying. Preparation→oxygen mixing→isostatic pressing→internal oxidation→reduction→envelope→hot extrusion→drawing→testing→finished product. Its representative patent is: "A kind of Al 2 o 3 Dispersion strengthened copper alloy and its preparation method", application number: CN200610128421.8. The process of mechanical alloying process is: copper powder + alumina powder → powder mixing → isostatic pressing → reduction → hot extrusion → drawing → testing → product. Its representative patent is: "Process Method for Producing Dispersion Strengthened Copper Alloy Mate...

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Problems solved by technology

[0003] The above two methods are powder metallurgy methods, the process flow is long, and the environmental quality requirements are strict in the process of alloy powder making and mixing. A little carelessness will pollute the alloy powder and affect the next process and finished products. quality

The long process route has resulted in many management elements, difficult processing, low yield rate, unstable quality, and difficulty in mass supply, so the degree of marketization is not high so far

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