Mg Li Sr alloy and its electrlysis preparing method

Abstract

One kind of Mg-Li-Sr alloy and its the electrolysis preparation method, which belongs to magnesium alloy material and it's the preparation technology area. The component and quality percentage of the alloy include: Lithium: 5-15%wt, strontium: 0.1-5%wt, aluminum:0.5-3%, zinc:0.5-3%, the remainder is magnesium, comparing with LA141Mg-Li alloy, the anticreep and corrosion resistance performance of the Mg-Li-Sr alloy are enhancement. This invention uses molten salt electrolysis method to prepare the Mg-Li-Sr alloy, its step is: melting magnesium alloy; configurating electrolyte; adding the electrolyte to magnesium melt body; The anode inducts in electrolyte, the negative pole inducts the Mg melt body; then made contact to electrolysis, lithium and strontium separate out and enter magnesium melt body, then obtain the liquid state Mg-Li-Sralloy, and get the Mg-Li-Sr alloy after condensation. Prepared the Mg-Li-Sr alloy with molten salt electrolysis has improved utilization rate of the material, and it is a new method to preparing Mg-Li-Sralloy.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy materials and preparation thereof, and in particular relates to a Mg-Li-Sr alloy and an electrolytic preparation method thereof. Background technique [0002] The density of magnesium is 1.74g / cm 3 , the density of lithium is 0.53g / cm 3 , There is a wonderful lattice transformation relationship between metal magnesium and lithium. Studies have shown that when the lithium content in the Mg-Li alloy is below 5.7%, its structure is an α solid solution formed by Li dissolving in the magnesium lattice. When the content of Li is between 5.7-11.5%, soft β-phase with body-centered cubic lattice structure appears in the structure, and its structure is a mixed structure of α solid solution and irregular β-phase. When the content of lithium is high At 11.5%wt, the alloy consists of a single β phase with a body-centered cubic lattice. The β phase has a higher cold and hot deformation ability than t...

AI Technical Summary

Problems solved by technology

When using this method to prepare Mg-Li-Sr alloys, since the melting temperature of magnesium alloys only needs to be 600-800°C and the temperature is relatively low, the driving force for the immersion reduction kinetics of strontium and lithium is small, and the reduction of strontium and lithium compounds When the rate is low and the temperature rises, the kinetic driving force of the immersion reduction of strontium and lithium increases, but the evaporation loss of strontium and lithium also becomes larger, and the material utilization rate is generally low when the Mg-Li-Sr alloy is prepared by immersion reduction. , longer production cycle, less economical