Rare-earth alloy permanent magnet material preparation device and technique

Abstract

A rare-earth alloy permanent magnet material preparation device comprises a raw material treatment portion, a precipitation tank, an electrolytic furnace, a grinding mechanism, a stamping mechanism and a vacuum sintering furnace. The raw material treatment portion comprises a rare-earth metal treatment tank and a blending tank, a delivery pipe connected with the blending tank is arranged on the rear-earth metal treatment tank, the blending tank is connected with the precipitation tank through a complexing solution delivery pipe, the precipitation tank is connected with the electrolytic furnace, a feed inlet is arranged on one side of the electrolytic furnace, a casting chamber is arranged at the tail end of the electrolytic furnace and connected with a cooling chamber, the cooling chamber is connected with the grinding mechanism through a discharge pipe, and the grinding mechanism is connected with the stamping mechanism which is connected with the vacuum sintering furnace. The problem of segregation of alloy ingots is solved effectively, high temperature strength, structural stability, welding performance and corrosion resistance of the alloy ingots are improved beneficially due to addition of Sc, and the common electrolytic furnace can be used for smelting the alloy ingots by adopting mixture after Nd, Pr, Dy and Sc complexing.

Description

technical field [0001] The invention relates to the technical field of rare earth permanent magnet materials, in particular to a preparation device and a preparation process for rare earth alloy permanent magnet materials. Background technique [0002] Rare earth permanent magnet material is a kind of permanent magnet material with the highest comprehensive performance at present. , AlNiCo has superior performance; and due to the use of rare earth permanent magnet materials, it not only promotes the miniaturization and integration of permanent magnet devices, but also improves the performance of products. Scandium, as a transition group element and a rare earth element, is added to the alloy, which can not only significantly refine the grains of the as-cast alloy, increase the recrystallization temperature to improve the strength and toughness of the scandium alloy, but also significantly improve the weldability of the scandium alloy, Due to its heat resistance, corrosion r...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional process of preparing rare earth alloy permanent magnet materials is to obtain the rare earth metal oxides in the front stage through various processes such as proportioning and smelting in the subsequent stage. However, there are many human factors in the production process, which are difficult to control, which in turn affects the batch size. quality of production

Taking NdFeB as an example, the praseodymium, neodymium, iron, boron and other components separated by extraction are mixed and then added to a vacuum melting furnace for melting, and alloy ingots are obtained after melting. Affected by factors such as the uniformity of the previous mixing and the control of the time interval and amount of manual addition, it is easy to cause segregation of the alloy ingot material after smelting, thereby affecting the performance of the alloy ingot material and the effect of the subsequent process. The technical requirements are relatively high, and a vacuum reduction melting furnace is required, which has relatively high requirements for the production equipment of the enterprise, resulting in a relatively large initial production investment

[0004] In addition, the rare earth permanent magnet materials currently produced have low actual coercive force, low working temperature stability, and weak corrosion resistance, which have become the main factors limiting their development and application in aerospace, ships, and weapons.

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