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Process of sintering nd-fe-b magnet with cerium-rich rare earth content

A cerium-rich rare earth, nd-fe-b technology, applied in the direction of magnetic objects, magnetic materials, inorganic materials, etc., can solve the problems of limited application and promotion, high equipment cost, cumbersome diffusion and dysprosium technology, and reduce the Material cost, guaranteed magnet performance, and the effect of enhancing the core competitiveness of the market

Active Publication Date: 2017-01-11
四川省有色冶金研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology of diffusion and infiltration of dysprosium is cumbersome, the cost of equipment is high, and it is also limited by sample size, thermal deformation, etc., and its related equipment, technology and patents are owned by Japan, which seriously limits the application and promotion of this technology in my country.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A process for sintering Nd-Fe-B magnets with cerium-rich rare earth content is characterized in that it comprises the following steps:

[0028] Step 1: Prepare raw materials according to the following components:

[0029] Nd: the weight percentage is 24.5%;

[0030] Fe: the weight percentage is 52.5%;

[0031] B: the percentage by weight is 0.96%;

[0032] Ce: the weight percentage is 10.04%;

[0033] La: percentage by weight is 12%;

[0034] Step 2: Smelting the configured raw materials to obtain quick-setting sheets with a thickness of 0.5mm;

[0035] Step 3: hydrogen crushing the quick-setting sheet obtained by smelting, and dehydrogenating to obtain magnetic powder with a particle size range of 1mm;

[0036] Step 4: Mix the magnetic powder protective agent with the magnetic powder at a ratio of 4ml magnetic powder protective agent per kilogram of magnetic powder;

[0037] Step 5: The magnetic powder mixed with the magnetic powder protective agent is subjected ...

Embodiment 2

[0046] A process for sintering Nd-Fe-B magnets with cerium-rich rare earth content is characterized in that it comprises the following steps:

[0047] Step 1: Prepare raw materials according to the following components:

[0048] Nd: the percentage by weight is 25.5%;

[0049] Fe: the weight percentage is 55.5%;

[0050] B: the weight percentage is 1%;

[0051] Ce: the weight percentage is 15%;

[0052] La: percentage by weight is 3%;

[0053] Step 2: Smelting the configured raw materials to obtain quick-setting sheets with a thickness of 0.6mm;

[0054] Step 3: Hydrogen crush the quick-setting tablet obtained by smelting, and dehydrogenate to obtain magnetic powder with a particle size range of 1.5 mm;

[0055] Step 4: Mix the magnetic powder protective agent with the magnetic powder at a ratio of 6ml magnetic powder protective agent per kilogram of magnetic powder;

[0056] Step 5: The magnetic powder mixed with the magnetic powder protective agent is subjected to jet mil...

Embodiment 3

[0065] A process for sintering Nd-Fe-B magnets with cerium-rich rare earth content is characterized in that it comprises the following steps:

[0066] Step 1: Prepare raw materials according to the following components:

[0067] Nd: the weight percentage is 26.5%;

[0068] Fe: the weight percentage is 54.5%;

[0069] B: the weight percentage is 1.15%;

[0070] Ce: the weight percentage is 16%;

[0071] La: percentage by weight is 1.85%;

[0072] Step 2: Smelting the configured raw materials to obtain quick-setting sheets with a thickness of 0.8mm;

[0073] Step 3: Hydrogen crush the quick-setting tablets obtained by smelting, and dehydrogenate to obtain magnetic powder with a particle size range of 2.5 mm;

[0074] Step 4: Mix the magnetic powder protective agent with the magnetic powder at a ratio of 8ml magnetic powder protective agent per kilogram of magnetic powder;

[0075] Step 5: The magnetic powder mixed with the magnetic powder protective agent is subjected to j...

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Abstract

The invention discloses a technology for sintering an Nd-Fe-B electromagnet with rich-cerium rare earth content. The technology is characterized by including the steps of 1), preparing the Nd-Fe-B electromagnet with raw materials comprising, by weight, 24.5%-27.5% of Nd, 52.5%-57.5% of Fe, 0.96%-1.15% of B and 17.0%-18.5% of rich-cerium rare earth, wherein the rich-cerium rare earth includes Ce and La, and the Ce accounts for less than 45% of the rich-cerium rare earth by weight; 2), smelting the disposed raw materials to obtain a quick-setting piece 0.5mm-0.8mm in thickness. Heavy rare earth in Nd-Fe-B sintering is replaced by the light rare earth of the Ce and the La which are rich in storage and low in price, performance of the electromagnet is guaranteed, cost of the materials is remarkably reduced, market core competitiveness of the Nd-Fe-B for sintering is enhanced, and a broad market prospect is achieved.

Description

technical field [0001] The invention relates to a process for sintering Nd-Fe-B magnets, in particular to a process for sintering Nd-Fe-B magnets with cerium-rich rare earth content. Background technique [0002] Since its inception, sintered Nd-Fe-B permanent magnet materials have been dubbed the "Magnetic King" for their excellent magnetic properties and cost-effectiveness, and are widely used in high-tech fields such as communications, medical care, aerospace, and automation. It is an important material in new energy fields such as hybrid vehicles, wind power generation, and energy-saving home appliances. Rare earth elements are the key raw materials for manufacturing sintered Nd-Fe-B permanent magnet materials, accounting for more than 80% of the entire raw material cost. Rare earth resources are limited, and rare earth prices continue to rise, which has brought huge economic pressure to manufacturers and users of sintered Nd-Fe-B permanent magnet materials with high he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/057H01F1/08B22F3/16B22F9/04C22C33/02
Inventor 李海英万宁邹善方彭力
Owner 四川省有色冶金研究院有限公司