Method and device for fused deposition of heavy rare earth elements on neodymium-iron-boron surface resistance wire

Abstract

The invention discloses a method and device for fused deposition of heavy rare earth elements on a neodymium-iron-boron surface resistance wire, relates to the technical field of permanent magnet material manufacturing, and mainly aims to solve the problems that an existing method for deposition of heavy rare earth elements on the surface of a neodymium-iron-boron permanent magnet material is complex in process and uneven in distribution of the heavy rare earth elements. The method for fused deposition of the heavy rare earth elements on the neodymium-iron-boron surface resistance wire comprises the following steps that S1, a neodymium-iron-boron permanent magnet material is pre-treated; S2, the neodymium-iron-boron permanent magnet material is introduced into a vacuum chamber and a transition chamber; S3, a resistance wire melting nozzle melts the wire containing the heavy rare earth elements and deposits the wire on the surface of the neodymium-iron-boron permanent magnet material; and S4, cooling is carried out. The device for fused deposition of the heavy rare earth elements on the neodymium-iron-boron surface resistance wire structurally comprises a conveyor belt, and an acidification pool, an isostatic pressing chamber, a vacuum chamber, a transition chamber, a fused deposition chamber and a cooling chamber are sequentially arranged along the conveyor belt. According to the method and device for fused deposition of the heavy rare earth elements on the neodymium-iron-boron surface resistance wire, the heavy rare earth elements can be uniformly deposited on the surface of the neodymium iron boron permanent magnet material through the fused deposition method of the resistance wire, and meanwhile the preparation process is further simplified.

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...

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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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