Coating method, coating system and method for preparing rare-earth magnet

A coating system, rare earth magnet technology, applied in the manufacture of permanent magnets, the application of magnetic films to substrates, the manufacture of inductors/transformers/magnets, etc., can solve problems such as unfavorable mass production, long time, and unfavorable production efficiency

Active Publication Date: 2017-01-04
BEIJING ZHONG KE SAN HUAN HI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For mass production, the number of sheet magnets that need to be processed at one time is large, and due to the limitation of the interval, more space is required to complete it, which is not conducive to the completion of mass production, and the equipment is an independent process from material input to output, not Continuous process, long time, not conducive to the improvement of production efficiency

Method used

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preparation example Construction

[0080] Third, an embodiment of the present invention provides a method for preparing a rare earth magnet, including:

[0081] Coating process: using the above-mentioned coating method to coat the magnet;

[0082] Grain boundary diffusion treatment process: heat-diffusion treatment is carried out on the coated magnet, and in 10 -1 Pa-10 -4 Pa vacuum state or 1Pa-80kPa inert gas environment, keep warm for 1h-60h in the range of 750°C-1000°C, and keep warm in the range of 800-900°C for 6h-30h; use the thermal diffusion-treated magnetic sheet as the second-level heat preservation For treatment, the temperature is 450°C-600°C, and the treatment time is 1h-10h.

[0083]In the embodiment of the present invention, before coating the magnet, oil removal, rust removal and drying are required, and the thickness of the magnet is less than 10 mm.

[0084] The coating method, coating system and preparation method of the rare earth magnet proposed in the embodiment of the present inventio...

Embodiment 1

[0087] 1. According to atomic percentage: (NdPr)-13.6%, Dy-1.8%, Tb-0.2%, Cu-0.1%, Co-1.0%, A-l0.52%, Ga-0.4%, B-5.7%, Fe-bal (bal is the abbreviation of balance) is used for proportioning and proportioning. The alloy thin strip is prepared by smelting alloy stripping method, and the thickness of the thin strip is controlled to 0.5-2mm. After hydrogen explosion and jet milling, the powder particle size D50=4.5μm, Under the protection of protective gas, the blank is pressed through a 1.8T magnetic field orientation, and vacuum sintered in a vacuum sintering furnace. The sintering temperature is 1040 ° C, kept for 4 hours, and then released after cooling. The sintered NdFeB magnet is processed into a magnetic sheet with a specification of 39mm×20mm×2.5mm, and the direction of 2.5mm is the magnetization direction of the magnet. The disks are cleaned by degreasing, pickling, activation and deionized water cleaning.

[0088] 2. Put the cleaned magnetic sheets on the tray in an ali...

Embodiment 2

[0110] The atomic percentage of ingredients is (NdPr)-13.2%, Dy-0.6%, Tb-0.2%, Cu-0.1%, Co-1.1%, Al-0.2%, Ga-0.1%, B-5.7%, Fe-bal , all the other processes are the same as in Example 1. After machining, the size is 34.5×11.2×1.95mm. 3000 pieces were taken for batch experiments, and 60 pieces were randomly taken out for testing to verify the magnetic performance and efficiency. The magnetic performance test results are shown in Table 4.

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Abstract

The invention discloses a coating method, a coating system and a method for preparing rare-earth magnets. In the method and the system disclosed by the invention, magnets are arranged on a conveying device in a plurality of rows in a horizontal direction; the magnets which are arranged in the plurality of rows sequentially pass through a sputtering area of sputter coating equipment to complete coating; a vertical distance between the sputter coating equipment and the upper surface of the magnets is 10mm to 200mm. The method and the system disclosed by the invention adopt continuous pass type magnetron sputtering equipment to sputter heavy rare earth such as Dy and Tb onto the surfaces of the magnets, the thickness of the sputtering layer is effectively controlled, the uniformity of the sputtering layer is guaranteed, thereby the uniformity of the magnetic property of magnetic sheets obtained by performing grain boundary diffusion to the sputtered magnets is guaranteed, and the rapid and continuous production of magnets by adopting the grain boundary diffusion technique can be realized.

Description

technical field [0001] The invention belongs to the technical field of rare earth magnet preparation, and in particular relates to a coating method, a coating system and a preparation method of a rare earth magnet. Background technique [0002] Sintered NdFeB magnets have excellent magnetic properties and are widely used in many fields such as electronic information, automobile industry, medical equipment, energy and transportation. In recent years, there have been new applications in energy-saving and environmental protection fields such as wind power generation, energy-saving home appliances and new energy vehicles. Many of these applications require magnets to have good heat resistance, that is, not only require magnets to have a high maximum energy product (BH) max , but also requires a high intrinsic coercive force H cj , to reduce irreversible demagnetization during use, especially in environments with relatively high operating temperatures, and ensure that the magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/56C23C14/16H01F41/02H01F41/18
CPCC23C14/165C23C14/35C23C14/56H01F41/026H01F41/18
Inventor 李志学李绍芳冯志兵李景宏
Owner BEIJING ZHONG KE SAN HUAN HI TECH
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