Preparation process of a sintered NdFeB permanent magnet
A preparation process and permanent magnet technology, applied in the fields of magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of backward preparation technology, low magnetic energy product, and low industrial added value, etc. The effect of high efficiency, high cooling rate and fast solidification rate
Inactive Publication Date: 2018-02-02
ANHUI ZHONGCI HI TECH
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Problems solved by technology
At present, the output of sintered NdFeB permanent magnets in my country is close to 80% of the world's total output, ranking first in the world. Although the total output of sintered NdFeB permanent magnets in my country is high, compared with developed countries, most of them are those with low magnetic energy products. Medium and low-end products, the level of preparation technology is backward, and the industrial added value is low
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Embodiment Construction
[0011] The technical solutions in the present invention are clearly and completely set forth below, and the described embodiments are only a part of the present invention. Based on the gist of the invention in the present invention, all those skilled in the art have obtained without making creative work. Other inventions and creations all belong to the protection scope of the present invention.
[0012] A preparation process of a sintered NdFeB permanent magnet according to this embodiment, a preparation process of a sintered NdFeB permanent magnet, comprises the following steps:
[0013] (1) Alloy liquid preparation; the weight percentage of the alloy liquid composition for making permanent magnetic materials is: Nd 20-30%, Pr 5-6.5%, B 1-4%, Ga: 0.5%-1.0%; Cu : 0.15-0.2%; Sn: 0.05-0.1%; Nd: 0.02-0.05%; Mo: 0.1-0.2%; the rest is Fe;
[0014] (2) Quick-setting casting strip; the molten alloy liquid is sprayed onto the rotating copper roller at a certain pressure and speed, an...
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The invention discloses a preparation process of a sintered NdFeB permanent magnet. The preparation process of the sintered NdFeB permanent magnet includes the following steps of 1, preparation of alloy liquid, 2, rapid hardening of casting strips, 3, hydrogen crushing, 4, sintering and heat treatment, and 5, after-processing and magnetizing. According to the technical scheme, the preparation process is advanced in technological level, toughness of the magnet is improved, the bending strength of the sintered NdFeB permanent magnet is enhanced, the density, mechanical property and coercivity ofthe magnet are improved, meanwhile the cost is reduced, and thus the permanent magnet has high coercivity and better magnetic performance.
Description
technical field [0001] The invention relates to the field of magnetic materials, in particular to a preparation process of a sintered NdFeB permanent magnet. Background technique [0002] Sintered NdFeB permanent magnets (Nd 2 Fe 14 B) It is the permanent magnet material with the best comprehensive magnetic properties today. Compared with bonded, injection molded and cast NdFeB permanent magnets, sintered NdFeB permanent magnets are characterized by their higher remanence and coercive force as well as excellent mechanical properties and The relatively low price is widely used in high-tech fields such as high-performance micro-motors, nuclear magnetic resonance, aerospace navigation, electric vehicles, and electronic information industries. It is also used in many emerging fields such as magnetic bearings, magnetic levitation trains, and wind turbines. has great application potential. At present, the output of sintered NdFeB permanent magnets in my country is close to 80% ...
Claims
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IPC IPC(8): H01F1/057H01F1/08H01F41/02C22C38/16C22C38/12B22F9/02
CPCH01F1/0577B22F9/023C22C38/002C22C38/005C22C38/008C22C38/12C22C38/16H01F41/0266
Inventor 余磊姜声应姜鸿魏友明程海良
Owner ANHUI ZHONGCI HI TECH