Preparation method of rear-earth magnesium alloy product

Abstract

The invention relates to a preparation method of a rear-earth magnesium alloy product. The preparation method comprises the following steps of: placing dehydrated rear-earth chlorate in a melting electrolysis device; adding dehydrated magnesium chloride, potassium chloride and titanium dichloride for dispersing, mixing and carrying out melting electrolysis, so that rear-earth magnesium intermediate alloy is generated by co-electrodeposition of rear-earth ion and magnesium ion at a negative electrode; burdening and mixing the rear-earth magnesium intermediate alloy and the metal magnesium in a smelting device, wherein a molar ratio of the rear-earth metal to the magnesium is (0.1-1.0):100; heating up the rear-earth magnesium alloy mixture for melting, immersing the smelting agent inside the melt and stirring, increasing the temperature to 780 DEG C and stewing for 20 minutes for dividing the melt into an upper layer, a middle layer and a lower layer, wherein the middle melt layer is used as the rear-earth magnesium alloy melt; casting after pre-cooling, cooling and forming, and carrying out surface treatment after carrying out mechanical processing and thermal processing, so that a compact proactive film layer is covered on the surface of the rear-earth magnesium alloy product. The preparation method of the rear-earth magnesium alloy product is high in preparation efficiency, safe and reliable in process, environment-friendly and low in energy consumption.

Description

technical field [0001] The invention relates to a preparation method of rare earth magnesium alloy products, belonging to the technical field of rare earth magnesium alloys. Background technique [0002] In the fields of aviation or aerospace, high-performance magnesium alloy products have a very important position and broad application prospects. In order to make magnesium alloys have high strength, high temperature resistance, corrosion resistance and oxidation resistance, rare earth elements are used in magnesium Alloy research has received renewed attention. Rare earth magnesium alloys can overcome the shortcomings of traditional magnesium alloy materials and meet the requirements of modern industry for materials such as light weight, energy saving, environmental protection, safety, comfort, and sustainable development. As the main alloying elements or microalloying elements, rare earths are playing an increasingly important role in the research field of magnesium alloys...

AI Technical Summary

Problems solved by technology

[0021] Compared with the prior art, the present invention has achieved the following beneficial effects: (1) The present invention adopts molten electrolysis cathode reduction technology, magnesium chloride and rare earth chloride salts are reduced at the cathode to obtain rare earth metals and magnesium metals, and the rare earth magnesium master alloy is prepared by one-step method , realize the simultaneous preparation of rare earth metals, magnesium and rare earth magnesium master alloys, and fundamentally solve the alloy preparation problems of rare earth metals and metal magnesium due to the large difference in physical properties; it can be reduced at the cathode by adjusting the raw material components and controlling molten electrolysis Rare earth magnesium master alloy with controllable rare earth composition and content