Preparation method of neodymium-iron-boron magnet applicable to new energy automobile
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A new energy vehicle, NdFeB technology, applied in the direction of magnetic objects, inductor/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of high production cost and unsatisfactory performance, and achieve the effect of improving performance
Inactive Publication Date: 2017-05-31
ZHEJIANG ZHONGKE MAGNETIC IND
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[0002] In the motor field of new energy vehicles, the performance requirements of NdFeB magnet products are relatively high, and the performance of existing magnetic powder and NdFeB magnet products cannot be met, and the production cost is very high
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[0022] The invention relates to the field of magnetic steel production, in particular to a method for preparing an NdFeB magnet suitable for new energy vehicles.
[0023] In order to solve the above technical problems, the present invention provides a method for preparing an NdFeB magnet suitable for new energy vehicles, which is characterized in that it comprises the following steps:
[0024] (1) Weigh 28.25% of praseodymium and neodymium metal, 2.75% of dysprosium, 0.98% of boron, 0.3% of niobium, 0.6% of aluminum, 2% of cobalt, 0.2% of copper, 0.25% of terbium, 0.2% of gallium, and 64.47% of pure iron Mix evenly; Mix evenly; After experimental testing, the ratio of materials is mixed according to the above, and the obtained product has better performance. The ratio of the various materials will directly affect the magnetic performance parameters of the final product.
[0025] (2) Add the material obtained in step (1) into a vacuum induction belt furnace, and in a vacuum st...
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Abstract
The invention relates to the field of magnetic steel production, and particularly relates to a preparation method of neodymium-iron-boron magnet applicable to new energy automobiles. The method comprises the steps that raw materials of 28.25% of praseodymium neodymium metals, 2.75% of dysprosium, 0.98% of boron, 0.3% of niobium, 0.6% of aluminum, 2% of cobalt, 0.2% of copper, 0.25% of terbium, 0.2% of gallium, and 64.47% of pure iron are weighed according to the weight proportions and are mixed evenly, and after the processes of fusion in a vacuum induction swing furnace, copper wheel cooling, reaction in a hydrogen quenching reactor, oxidizing agent adding, stirring, and grinding, the magnetic powder is obtained; then models are made for the magnetic powder according to the sizes of the products, and in an environment of complete seal and low oxygen, after the pressing with a high magnetic field pressing machine, and under a high intensity pressure of 20 Mpa, crude products with densities of 4.4-4.8 g / cm<3> are made; the crude products are put into a vacuum sintering furnace, under a vacuum condition, the crude products are heat preserved under a high temperature of 1020-1045 DEG C for 5 hours and under an intermediate temperature of 850-950 DEG C for 3 hours and under a low temperature of 500-560 DEG C for 5 hours, and the neodymium-iron-boron magnet products are obtained.
Description
technical field [0001] The invention relates to the field of magnetic steel production, in particular to a method for preparing an NdFeB magnet suitable for new energy vehicles. Background technique [0002] In the motor field of new energy vehicles, the performance requirements of NdFeB magnet products are relatively high, and the performance of existing magnetic powder and NdFeB magnet products cannot be met, and the production cost is very high. Contents of the invention [0003] The main technical problem to be solved by the present invention is to provide a method for preparing NdFeB magnets suitable for new energy vehicles, using self-made magnetic powder to manufacture NdFeB magnet products, thereby improving the performance of NdFeB magnet products and reducing production cost. [0004] A method for preparing an NdFeB magnet suitable for new energy vehicles, characterized in that it comprises the following steps: [0005] (1) Weigh 28.25% of praseodymium and neod...
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