A kind of combined processing method of copper-magnesium alloy

Abstract

The invention relates to a combined processing method of copper-magnesium alloy. The combined processing method comprises the following steps: step1, performing continuous equal-channel corner extrusion processing, namely cutting as-cast copper magnesium alloy into columnar test samples, performing normal pretreatment on the test sample and uniformly coating a solid lubricant on a surface of a mould, putting the solid lubricant into the mould to perform continuous multi-pass equal-channel corner extrusion processing at the normal temperature, wherein test samples rotate by 180 degrees along the axis direction between adjacent extrusion passes to realize tissue ultra-refining of the alloy; step2, performing subsequent annealing thermal treatment, namely performing surface cleaning and treatment on test samples obtained in the first step, and putting the cleaned and treated test samples into a box type resistance furnace to perform thermal treatment, wherein the thermal treatment processes are as follows: an annealing temperature is 150-200 DEG C, and heat-preserving time is 0.5-2 hours; and finally obtaining high-strength high-conductivity copper magnesium alloy bocks with excellent corrosion resistance. The combined processing method of the copper-magnesium alloy disclosed by the invention has a high yield rate, simple process operation and equipment requirements, and a good industrial application prospect.

Description

technical field [0001] The invention relates to a combined processing method of copper-magnesium alloys, more specifically to a processing method for improving the microstructure of copper-magnesium alloys by using equal-channel angular extrusion and subsequent annealing heat treatment to improve its corrosion resistance, which belongs to alloy anti-corrosion processing field. Background technique [0002] Copper-magnesium alloy is a solid-solution-strengthened alloy with a small amount of magnesium as an added element. Since the atomic radii of copper and magnesium are relatively close, when magnesium atoms are doped into copper metal, its strength will be greatly improved, but its electrical conductivity will be greatly improved. Less affected. Copper-magnesium alloy was first used to manufacture catenary cables for electrified railways. It has high mechanical strength, good wear resistance, heat resistance, high temperature oxidation resistance, and moderate electrical c...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to improve the toughness and corrosion resistance of copper-magnesium alloys, and propose a combined processing method for copper-magnesium alloys, which mainly applies equal-channel angular extrusion and subsequent heat treatment processes to those with poor corrosion resistance. The copper-magnesium alloy can improve its strength, toughness and corrosion resistance by controlling the structure without changing the shape and size of the sample. The operation steps and equipment requirements of the present invention are simple and easy to implement

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