A method and equipment for fused deposition of heavy rare earth elements on NdFeB surface resistance wire

Abstract

The invention discloses a method and equipment for melting and depositing heavy rare earth elements on the surface of NdFeB permanent magnet materials, and relates to the technical field of permanent magnet material production, and is mainly used to solve the existing method for depositing heavy rare earth elements on the surface of NdFeB permanent magnet materials The problem of complex process and uneven distribution of heavy rare earth elements. Including the following steps: S1, pretreatment of NdFeB permanent magnet materials; S2, introduction into vacuum chamber, transition chamber; S3, resistance wire melting nozzle melting wire containing heavy rare earth elements and depositing it on NdFeB permanent magnet Material surface; S4, cooling. Its structure includes: a conveyor belt, an acidification tank, an isostatic pressure chamber, a vacuum chamber, a transition chamber, a melting deposition chamber and a cooling chamber arranged sequentially along the conveyor belt. The invention provides a method and equipment for fused deposition of heavy rare earth elements on the surface of NdFeB resistance wires. Using the method of fused deposition of resistance wires, heavy rare earth elements can be uniformly deposited on the surface of NdFeB permanent magnet materials, and at the same time, the process of Preparation Process.

Description

technical field [0001] The invention relates to the technical field of permanent magnet material production, in particular to a method and equipment for melting and depositing heavy rare earth elements on NdFeB surface resistance wires. Background technique [0002] NdFeB permanent magnet material, as a material with good comprehensive magnet performance, is widely used in major electronic products such as mobile phones, earphones, batteries, etc. At present, NdFeB can be mainly divided into sintered NdFeB and bonded NdFeB. In order to meet the different requirements of magnet properties such as energy product and coercive force, some heavy rare earth metals are often doped or replaced in NdFeB permanent magnet materials. However, considering the characteristics of difficult development of heavy rare earth elements, complex extraction process, high cost of use, and less storage than other metals, even if only a small amount of heavy rare earth elements are doped in NdFeB, i...

AI Technical Summary

Problems solved by technology

However, these methods cannot guarantee that the powders have the same particle size, nor can they guarantee the number of powders in a unit space, so there are uneven distribution of heavy rare earth elements and poor bonding performance, which leads to the heavy rare earth deposition layer being easy to change from NdFeB permanent magnet to NdFeB permanent magnet. The problem of material matrix falling off

At the same time, the existing method also has the defect of complex process

In addition, none of the existing NdFeB permanent magnet material coating methods can deposit irregular NdFeB permanent magnet materials with many surface defects.

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