High-flux alloy preparation and Ho-Fe-B phase diagram testing method

Abstract

The invention provides a high-flux alloy preparation and Ho-Fe-B phase diagram testing method. The high-flux alloy preparation and Ho-Fe-B phase diagram testing method includes the steps that the massof Fe and B is weighed and proportioned according to the design requirements; the proportioned Fe and the proportioned B are smelted to form a FeB alloy compound; a smelted FeB cast ingot is subjected to homogenization heat treatment in a vacuum state; a processed sample is cut and then subjected to metallographic treatment; a FeB alloy after metallographic treatment and a Ho cylinder are combined in a stacking mode by adopting a vacuum sintering furnace burning way; the FeB-Ho after high-flux preparation is placed in a vacuum sealing tube, and is subjected to heat preservation at 800 DEG C for 480 h; after diffusion, the sample is cut to observe a phase structure formed by diffusion layers; and metallographic structure distribution of the diffusion layers is obtained by adopting high-flux testing to analyze a phase structure relationship among the diffusion layers. According to the high-flux alloy preparation and Ho-Fe-B phase diagram testing method, the experimental period of drawing a phase diagram is shortened, the manpower and material resources are saved, and a clear and accurate Ho-Fe-B phase relationship is obtained.

Description

technical field [0001] The invention belongs to the field of permanent magnet materials, and in particular relates to a high-throughput alloy preparation and Ho-Fe-B phase diagram testing method. Background technique [0002] The development, production and application of rare earth permanent magnet materials are the material basis of a country's high-tech and social development; widely used in computer technology, information technology, aerospace technology, automation technology, medical equipment and household appliances; no rare earth permanent magnet materials There would be no industrial modernization, let alone the progress of human civilization. my country is rich in rare earth resources, and my country is also a major producer of rare earths. According to the statistics of the China Rare Earth Industry Association, in 2016, my country produced 140,000 tons of rare earth permanent magnet blanks, of which 26,900 tons were exported, and continued to maintain rapid gr...

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Problems solved by technology

[0004] The conventional method for determining the phase diagram is to use the alloy method, but the efficiency of the alloy method is low and it is easy to ignore some phase components, resulting in the absence of the phase diagram

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