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The nano-scale rare earth magnesium-zirconium refiner developed by Baotou Rare Earth Research Institute has entered the stage of 100 kg/time pilot-scale preparation.
Magnesium alloy grain size control technology is one of the most fundamental and significant technical methods to control the properties of magnesium alloy materials.
It is understood that based on the mechanism of the refining ability of zirconium, the zirconium particles in the refining agent used are required to have a relatively uniform distribution of zirconium particles, and the size should be as low as 900 nm, so as to ensure that the zirconium element in the magnesium alloy application material has a good performance in the preparation and subsequent use.
The rare earth magnesium alloy pilot line is based on the previous research results on the coupling and refining mechanism of rare earth and zirconium elements, and adopts a new metallurgical preparation method to develop a rare earth magnesium zirconium grain refiner with a zirconium particle size of less than 600 nm The product, the refined particle size is 30% of the zirconium particle size in the traditional magnesium-zirconium master alloy, the nano-particle size distribution rate is greater than 60%, and the agglomeration phenomenon between particles is less than 5%, which can provide a wealth of heterogeneous shapes for magnesium Nucleation points, supplemented by rare earths to enhance the driving force of system nucleation, realize the high-efficiency refinement of magnesium alloy grains
At present, the product has completed the research and development of the small-scale production process, and the product has been verified by customers.
Nano-level refiner products can be widely used in the preparation of high-strength heat-resistant magnesium alloy materials and high-plastic deformation magnesium alloy materials, and contribute to the development of material technology in aerospace and defense industries
