A rare earth permanent magnetic material preparing method

A rare-earth permanent magnet and residual material technology, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of magnetic powder compact oxidation, fusion, combustion, etc., and achieve short holding time, high utilization rate, and sintering energy consumption low effect

Active Publication Date: 2015-09-16
浙江三环康盈磁业有限公司
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Problems solved by technology

[0009] Further, this method can solve the problems of oxidation, adhesion, fusion, and burning of magnetic powder compacts during processing. This method does not need to add any antioxidants during powder making and pressing, and does not need to apply any cooling during processing. agents, cutting fluids, lubricants or anti-fusion powders

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  • A rare earth permanent magnetic material preparing method
  • A rare earth permanent magnetic material preparing method
  • A rare earth permanent magnetic material preparing method

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Embodiment Construction

[0076] Preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0077] The rare earth permanent magnet material used in the specific embodiment of the present invention is R-T-B, R is at least one element selected from rare earth elements and Y, T is a transition metal element including Fe, and B is boron.

[0078] Preferably, the alloy comprises 26-31wt% of Nd and / or Pr, 0-5wt% of Dy, 0-1wt% of Co, 0-0.5wt% of Nb, 0-0.2wt% of Al, 0-0.2 Wt% Cu, B 0.9-1.1wt%, balance Fe.

[0079] The R-T-B rare earth permanent magnet material was prepared by the following preparation method.

[0080] Such as Figure 1-2 As shown, firstly, the casting sheet of R-T-B rare earth permanent magnet material is prepared by the known rapid quenching technology, which specifically includes: melting the a...

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Abstract

The invention relates to a rare earth permanent magnetic material preparing method comprising the steps of preparing a press blank of powder of sintered magnets, using row wires to machine the press blank and then performing sintering. All the steps are performed in a wholly sealed atmosphere. The row wire machining means line machining for the press blank formed by pressing; after the press blank is clamped and located, a driving mechanism drives the row wires to move back and forth linearly; the press blank is machined according to a preset path along with the rotation of a locating clamp and finally forms a block body or a sheet body with a preset shape and size, an arched body or other specially-shaped bodies; the final forming size contains the sintering shrinkage allowance. The rare earth permanent magnetic material preparing method has the advantages of short preparation technological process, high machining efficiency, low magnetic powder loss, and high rare earth utilization rate. The machining is near net machining, so that a finish machining procedure performed after sintering is saved.

Description

technical field [0001] The invention relates to a method for manufacturing rare earth permanent magnet materials, belongs to the technical field of sintered magnet preparation, and in particular relates to a preparation process of sintered NdFeB permanent magnet materials. Background technique [0002] Rare earth sintered magnet is a kind of rare earth permanent magnet material manufactured by the principle of powder metallurgy. In addition to equipment, sensors, magnetic separation, magnetic attraction and other fields, it is widely used in various industrial motors including automobiles, computer hard drives, wind power generation, electric tools, electric bicycles, air-conditioning compressors, elevators, aerospace and other fields middle. [0003] High-performance NdFeB materials have high requirements on production lines and preparation methods, especially for NdFeB materials prepared by sintering process, the magnetic powder particle size is finer, and the material is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/02B22F3/04B22F3/16H01F1/057
Inventor 汪康道
Owner 浙江三环康盈磁业有限公司
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