Preparation process of corrosion-resistant neodymium-iron-boron magnet
A preparation process, NdFeB technology, applied in the manufacture of permanent magnets, magnetic objects, inductors/transformers/magnets, etc., can solve problems affecting magnetic properties, achieve fast solidification rate, uniform mixing, and improve corrosion resistance Effect
Inactive Publication Date: 2021-05-28
陈凯华
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Problems solved by technology
[0005] Aiming at the deficiencies of the prior art, the present invention provides a preparation process of a corrosion-resistant NdFeB magnet, which solves the problem that the existing NdFeB magnets are prepared by columnar casting, but due to the presence of more network iron , problems affecting magnetic properties
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] see Figure 1-2 , the embodiment of the present invention provides a technical solution: a preparation process of a corrosion-resistant NdFeB magnet, the preparation process specifically includes the following steps:
[0031] Step 1, batching and weighing: Weigh the required amount of metallic neodymium and refined boron through a platform scale, weigh the required amount of metallic iron through a balance, and weigh a certain amount of praseodymium, co...
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The invention discloses a preparation process of a corrosion-resistant neodymium-iron-boron magnet, and the preparation process specifically comprises the following steps: step 1, burdening and weighing: weighing a required amount of metal neodymium and refined boron through a platform scale, weighing a required amount of metal iron through a balance, weighing a certain amount of praseodymium, cobalt, dysprosium, niobium, aluminum and copper raw materials respectively, weighing again and re-checking; and step 2, smelting: sequentially putting the weighed raw materials into a vacuum smelting casting furnace, melting metal materials, and uniformly stirring under the action of eddy current. The invention relates to the technical field of neodymium-iron-boron magnet preparation. According to the preparation process of the corrosion-resistant neodymium-iron-boron magnet, in the sheet casting process, molten liquid is poured into the surface of a rotating water-cooling metal roller and then thrown out, a thin-sheet cast ingot is obtained, the solidification rate of a cast sheet is higher than that of a conventional cast block, generation of network iron dendritic crystals is restrained, and the dispersity of metal neodymium in the cast sheet is better.
Description
technical field [0001] The invention relates to the technical field of NdFeB magnet preparation, in particular to a preparation process of a corrosion-resistant NdFeB magnet. Background technique [0002] Neodymium magnets, also known as NdFeB magnets, are tetragonal crystals formed of neodymium, iron, and boron. In 1982, Masato Sagawa of Sumitomo Special Metals discovered neodymium magnets. The magnetic energy product of this magnet is greater than that of samarium-cobalt magnets. At that time, the material with the largest magnetic energy product in the world. Later, Sumitomo Special Metals successfully developed the powder metallurgy method, and General Motors successfully developed the spin spray melting method, which can prepare NdFeB magnets. The permanent magnet is also the most commonly used rare earth magnet. NdFeB magnets are widely used in electronic products, such as hard disks, mobile phones, earphones, and battery-powered tools. NdFeB is divided into sintered N...
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IPC IPC(8): H01F41/02H01F1/057
CPCH01F41/0253H01F41/026H01F41/0266H01F41/0293H01F1/0573H01F1/0576H01F1/0577
Inventor 陈凯华
Owner 陈凯华