Flux for smelting rare-earth-contained magnesium alloy and production method thereof

Abstract

The invention belongs to the field of metal materials and metallurgy, and provides flux used to melt magnesium alloy containing rare earth; the mass percentage of the flux is as follows: 20 percent to 30 percent of magnesium chloride, 35 percent to 45 percent of potassium chloride, 10 percent to 15 percent of sodium chloride, 10 percent to 15 percent of lithium chloride, and 5 percent to 10 percent of sodium carbonate. The production method comprises the following steps: the magnesium chloride, the potassium chloride, the sodium chloride and the lithium chloride are mixed by the mass percentage and dried for more than 20 hours at 70 DEG C to 100 DEG C; and then the carbonate is added in the dried mixture, mechanically mixed for more than 12 hours in a planetary mill, and then put into a closed container for stand-by. The flux developed by the invention is used to melt magnesium alloy containing rare earth, and can serve as covering agent and refining agent in melting. The flux can greatly reduce the loss of rare earth elements in melting, has quite good adhesion capability of containing non-metal, simple and convenient production method, and low cost. The flux is also applicable to the magnesium alloy not containing rare earth.

Description

technical field [0001] The invention belongs to the field of metal materials and metallurgy, and mainly relates to a flux for smelting rare earth-containing magnesium alloys and a production method thereof, which is used as a covering agent in the smelting process of rare earth-containing magnesium alloys to isolate air and prevent oxidative combustion of alloy liquid. And the refining agent in the refining process is used to remove non-metallic inclusions in the smelting process of the rare earth-containing magnesium alloy. Background technique [0002] Magnesium alloy is currently the lightest metal structure material in engineering applications, its density is only 23% of steel, 64% of aluminum alloy; magnesium alloy has high specific stiffness and specific strength, good damping and shock absorption, Excellent electromagnetic shielding, anti-electromagnetic interference performance. The application of magnesium alloys in automobiles and motorcycles can achieve the purpo...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a simple, convenient and cheap flux for smelting magnesium alloy containing rare earth and its production method aiming at the deficiency of existing magnesium alloy flux; Flame retardant protection and refining treatment; it can be used as both a covering agent and a refining agent during magnesium alloy smelting, and can also be used as a covering agent and refining agent at the same time; it can prevent magnesium alloy melt from Oxidation combustion and purification of magnesium alloy melt to remove oxidation inclusions can greatly reduce the loss of rare earth elements in the smelting process