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Production method of low-price rapidly quenched magnetic powder containing lanthanum and cerium

A production method and technology of magnetic powder, which are applied in the manufacture of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problems of the backlog of rare earth lanthanum cerium high abundance rare earth elements and the unbalanced application of rare earth elements, and achieve cost reduction. Effect

Active Publication Date: 2017-09-01
温强 +1
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  • Abstract
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Problems solved by technology

[0003] Among rare earth resources, lanthanum and cerium elements account for about 70%, and praseodymium and neodymium elements account for about 20%. application imbalance

Method used

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Embodiment Construction

[0016] The technical solutions provided by each embodiment of the invention are described in detail below.

[0017] The invention provides a kind of production method of the low-price quenching magnetic powder containing lanthanum and cerium, comprising the following steps:

[0018] Step a, the raw materials are loaded into the crucible sequentially according to the order of the first layer of iron, zirconium, ferroboron, second layer of iron, lanthanum cerium, and praseodymium neodymium; the first layer of iron is located on one side of the bottom surface of the crucible, and the The zirconium is located on the other side of the bottom surface of the crucible, the ferroboron is located above the zirconium, the second layer of iron is located above the ferroboron, and the lanthanum and cerium are located above the first layer of iron , the praseodymium neodymium is located above the lanthanum cerium; the first layer of iron and the second layer of iron are both iron rods;

[...

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Abstract

The invention provides a production method of low-price rapidly quenched magnetic powder containing lanthanum and cerium. The method comprises the following steps of loading raw materials into a crucible according to the order of a first layer of iron, zirconium, ferroboron, a second layer of iron, lanthanum cerium and praseodymium neodymium; starting a smelting furnace for preheating and discharging an adsorbed gas in the raw materials; further increasing power until the raw materials are completely melted, pouring and obtaining a uniform alloy; carrying out rapid quenching treatment on the alloy to obtain an alloy strip; finally carrying out crystallization treatment on the alloy strip, wherein the composition formula of the magnetic powder is (LaCe+PuNd)<x>(FeZr)<84.5-x>B<6.5>, wherein X is 9-11 and the ratio of LaCe:PuNd is 1:(0.2-4). One part of praseodymium neodymium is replaced with the lanthanum cerium, so that the residual magnetic flux density Br of the prepared magnetic powder is (5-7.5)kGs, the intrinsic coercive force Hcj is (6-9.5)kOe and the maximum magnetic energy product BH is (6-12)MGOe. The magnetic powder is suitable for the market requirements, the cost of the raw materials is reduced and a new application way is opened up for highly abundant rare earth.

Description

technical field [0001] The invention relates to the technical field of magnetic powder, in particular to a production method of low-priced quick-quenching magnetic powder containing lanthanum and cerium. Background technique [0002] The NdFeB smelting process is one of the key links in the production of magnetic powder, and the control of the smelting process largely determines the final performance of the magnetic powder. NdFeB smelting process is to prepare praseodymium, neodymium, boron, iron, lanthanum, cerium, zirconium, iron and other raw materials according to a certain proportion, arrange the raw materials in a reasonable order, and conduct induction with the iron in the raw materials through the intermediate frequency coil , so that various raw materials are melted, and finally a liquid neodymium-iron-boron alloy is formed. The liquid alloy is then cooled by the wheel and brought to the cooling carousel where the alloy flakes are collected. The whole process is c...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/057B22D11/06
CPCB22D11/06H01F1/0571H01F41/0253
Inventor 沈秉彝温强熊友勤
Owner 温强
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