Method for preventing melt from reflowing for magnesium alloy casting liquid transfer and liquid transfer device

Abstract

The invention relates to a method for preventing a melt from reflowing for magnesium alloy casting liquid transfer and a liquid transfer device. A protecting gas inlet pipe is connected onto a liquidtransfer pipe and communicates with an inert gas source; after liquid transfer is accomplished, a protecting gas is fed into the liquid transfer pipe, and magnesium and a magnesium alloy solution cannot be reflowed after the protecting gas is fed, so that the problem that after a liquid transfer pump is stopped, the magnesium alloy solution is reflowed due to a pressure difference between a heat preserving furnace and a melting refining furnace is solved; under the action of the protecting gas, an inner wall of the liquid transfer pipe and the magnesium alloy solution are not oxidized any more, so that the problem that the magnesium alloy solution in the liquid transfer pipe is oxidized and blocked can be effectively solved, and the liquid transfer pipe has no need to be taken out from each furnace so as to be cleaned; and the liquid transfer pipe can be placed in the furnace and has no need to be taken out after being installed, and can be multi-melt continuously used for a long time,so that the pollution of the magnesium alloy solution is reduced, the service life of the liquid transfer pipe is prolonged, and the labor intensity of workers is reduced.

Description

Technical field: [0001] The invention belongs to the technical field of production and manufacture of magnesium and magnesium alloy parts, and in particular relates to a method for preventing melt backflow and a liquid transfer device for magnesium alloy melting and casting. Background technique: [0002] Magnesium and magnesium alloy materials have great demand in aviation, transportation equipment, especially in the automobile manufacturing industry. The existing magnesium alloy material preparation process is: magnesium ingot melting, alloying, refining static, liquid transfer, heat preservation, casting into magnesium alloy ingots, rods, slabs or various castings. Liquid transfer is to transfer the refined magnesium liquid or magnesium alloy liquid to the holding furnace. At present, there are two methods of liquid transfer for magnesium and magnesium alloys: one is to transfer liquid by pump, and the other is to transfer liquid by air pressure; All the liquid transfer ...

AI Technical Summary

Problems solved by technology

[0003] To sum up, in order to overcome the deficiencies of the existing technical problems, the present invention provides a method for preventing melt backflow and a liquid transfer device for magnesium alloy melting and casting, which is to connect a protective gas inlet pipe to the liquid transfer pipe, The inlet pipe is connected to the inert gas source. After the liquid transfer is completed, the protective gas is introduced into the liquid transfer pipe. After the protective gas is introduced, the magnesium alloy solution will not flow back. The flow problem caused by the difference in the level of the magnesium alloy liquid level; under the action of the protective gas, the inner wall of the liquid transfer pipe and the magnesium alloy liquid are no longer oxidized, which can effectively solve the problem of oxidation and blockage of the magnesium alloy liquid in the liquid transfer pipe, so that the liquid transfer pipe does not Then take out and clean each furnace; so that the liquid transfer tube can be placed in the furnace without taking it out after installation, and can be used continuously for a long time in multiple furnaces, reducing the pollution of magnesium alloy liquid, prolonging the service life of the liquid transfer tube, and reducing the labor intensity of workers

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