A kind of alloy powder preparation method of recycling copper chromium alloy

Abstract

The invention provides a preparation method of alloy powder for recycling copper-chromium alloy. The preparation method specifically comprises the following steps of cleaning and drying; vacuum induction melting, specifically, putting CuCr alloy leftovers into a crucible of a melting chamber, and starting to heat when the vacuum degree reaches 10 <-1 > Pa or below; increasing the heating power ina gradient mode, keeping at 40 kW for 3-5 min, keeping at 60 kW for 3-5 min, finally raising to 80 kW, when the CuCr alloy in the crucible starts to be molten, closing a vacuum system, and then introducing argon to reach the standard atmospheric pressure; then increasing the power to 100-150 kW, melting the CuCr alloy, and obtaining the completely molten CuCr alloy molten liquid; refining and removing impurities; atomizing to prepare powder; and screening to obtain CuCr alloy powder with different particle sizes. The method provided by the invention is simple in process and low in manufacturing cost, the copper-chromium alloy waste can be efficiently recycled, and the CuCr alloy powder low in gas content and high in purity is prepared.

Description

technical field [0001] The invention relates to the technical field of alloy powder production, in particular to a method for preparing alloy powder for copper-chromium alloy recovery and reuse. Background technique [0002] Copper-chromium alloy is a series of alloys formed by adding chromium and other trace alloy elements on the basis of copper. Because of its high strength and hardness after heat treatment, as well as good electrical and thermal conductivity and corrosion resistance, it is widely used in many industries. Has been widely used. [0003] Existing copper-chromium alloy recycling usually cuts and grinds copper-chromium alloy scraps first, then presses the obtained copper-chromium alloy chips into consumable electrodes, and then uses electrode induction gas atomization to make powder; the prefabricated The bar is refined in the area, and the metal liquid flows down through the nozzle continuously and vertically. When passing through the nozzle, the metal liqui...

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Problems solved by technology

[0004] The existing technology has the following disadvantages. First, during the cutting and grinding process, the alloy chips are easily oxidized, and the impurities in the alloy chips will increase due to the wear of tools and other materials during the process. It consumes a lot of energy and causes waste; secondly, due to its high strength, copper-chromium alloy chips are difficult to densify during the pressing process and require extremely high pressing force, so extremely stringent requirements are put forward for equipment and molds; thirdly, electrode Inductive gas atomization powder making, the material cannot be fully smelted, the impurity and gas content of the electrode material itself cannot be reduced, and the electrode densification degree is low, and it is easy to deflate and short circuit during the electrode induction gas atomization process, resulting in the inability to continue production; Fourth, the electrode induction gas atomization pulverization needs to consume a lot of energy and protective gas, and the production cost is much higher than the cost of raw materials, which makes this method unable to be applied in batches

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