A kind of NdFeB magnet manufacturing method

A manufacturing method and NdFeB technology, applied in inductor/transformer/magnet manufacturing, electrical components, circuits, etc., can solve the problem that magnet fragments cannot be completely smelted, and achieve simple implementation, avoid secondary rework, and uniform heating. Effect

Active Publication Date: 2020-12-08
ZHEJIANG SHEENSEN MAGNETICS TECH CO LTD
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Problems solved by technology

[0002] As the third generation rare earth permanent magnet material, NdFeB magnets have a high performance-price ratio. NdFeB magnets are widely used in energy, transportation, machinery, medical, IT, home appliances and other industries, but traditional NdFeB magnets The processing method will make the magnet fragments in the middle of the crucible unable to be completely smelted because the temperature of the inner flame of the flame is lower than that of the outer flame during smelting.

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  • A kind of NdFeB magnet manufacturing method
  • A kind of NdFeB magnet manufacturing method
  • A kind of NdFeB magnet manufacturing method

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Embodiment Construction

[0039] In order to achieve the above object, the present invention adopts the following technical solutions: a method for manufacturing an NdFeB magnet, comprising the following steps:

[0040] a. Raw material preparation and pretreatment: Weighing, crushing, cutting and derusting the magnets by using steel bar cutting machine and drum polishing machine;

[0041] b. Melting: Use a vacuum melting furnace to melt the pretreated magnets to make NdFeB alloys;

[0042] c. Hydrogen explosion: use a vacuum hydrogen treatment furnace to carry out hydrogen explosion on the smelted NdFeB alloy;

[0043] d. Powder making: use a magnet crusher to crush the NdFeB alloy fragments after hydrogen explosion into powder;

[0044]e. Molding orientation: use a magnetic field press and an isostatic press to shape the powder;

[0045] f. Sintering: use a vacuum sintering furnace to sinter the formed semi-finished product;

[0046] g. Machining: use a grinding machine to machine the sintered NdFe...

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Abstract

The invention discloses a method for manufacturing a neodymium iron boron magnet. The method comprises steps of raw material preparation and pretreatment, a magnet is weighed, broken, cut and derusted by a steel cutter and a barrel polishing machine; smelting, the pretreated magnet is smelted by a vacuum smelting furnace to form neodymium iron boron alloy; hydrogen explosion, hydrogen explosion of the smelted neodymium iron boron alloy is performed by a vacuum hydrogen treatment furnace; milling, a magnet crusher is utilized to break neodymium iron boron alloy pieces after hydrogen explosion into powder; molding orientation, the powder is shaped through utilizing a magnetic field press and an isostatic press; sintering, a formed semi-finished product is sintered by a vacuum sintering furnace; and machining, the sintered NdFeB magnet is machined through utilizing a grinding machine. The method is advantaged in that the method is simple to implement, can fully stir the magnet pieces heated in a crucible to achieve uniform heating, and avoid the need for secondary rework due to uneven heating due to local heat unevenness.

Description

technical field [0001] The invention belongs to the field of NdFeB magnet processing, and in particular relates to a manufacturing method of NdFeB magnets. Background technique [0002] As the third generation rare earth permanent magnet material, NdFeB magnets have a high performance-price ratio. NdFeB magnets are widely used in energy, transportation, machinery, medical, IT, home appliances and other industries, but traditional NdFeB magnets The processing method will make the magnet fragments in the middle of the crucible unable to be completely smelted because the inner flame temperature of the flame is lower than the outer flame during smelting. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present invention provides a NdFeB magnet manufacturing method capable of uniformly stirring the magnet fragments in the crucible so that the magnet fragments in the crucible are evenly heated and completely dissolved. [0004] In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02C22C33/04
CPCC22C33/04H01F41/0253
Inventor 鲍本唐国才
Owner ZHEJIANG SHEENSEN MAGNETICS TECH CO LTD
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