CN105478787A - Oxidization method of rapidly-quenched bonded neodymium iron boron (NdFeB) permanent magnet powder - Google Patents
Oxidization method of rapidly-quenched bonded neodymium iron boron (NdFeB) permanent magnet powder Download PDFInfo
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- CN105478787A CN105478787A CN201510873525.0A CN201510873525A CN105478787A CN 105478787 A CN105478787 A CN 105478787A CN 201510873525 A CN201510873525 A CN 201510873525A CN 105478787 A CN105478787 A CN 105478787A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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Abstract
The invention discloses an oxidization method of rapidly-quenched bonded neodymium iron boron (NdFeB) permanent magnet powder. The oxidization method includes the following steps that, by weight percentage, 12%-25% of rare-earth metal, 0.9%-1.3% of boron, 4.8%-5.4% of zirconium and the balance iron are melted in a vacuum manner, broken, rapidly quenched in a vacuum manner, pressed for the first time and subjected to vacuum crystallization thermal treatment, and semi-finished permanent magnet powder is obtained; rare-earth metal comprises, by weight percentage, 3%-5% of lanthanum cerium alloy and 15%-25% of praseodymium neodymium alloy, the semi-finished permanent magnet powder enters an oxidization chamber to be wet through steam and oxidized, the oxidization temperature is 80 DEG C, and the relative humidity is 70%; the semi-finished permanent magnet powder is conveyed into a drying chamber at the speed of 0.2 m/min to be dried after oxidization, the temperature in the drying chamber ranges from 100 DEG C to 120 DEG C, and the drying time is 25 min; and vibration screening is conducted on the semi-finished powder, and the semi-finished permanent magnet powder which meets the particle size requirement and is dry is screened out. Oxidized powder is good in fluidity and good in apparent density, and mechanical magnet pressing efficiency is improved; and crystals remaining in the powder are eliminated, and the phenomena that a manufactured magnet is peeled and bulges are avoided.
Description
Technical field
The present invention relates to Agglutinate neodymium-iron-boron NdFeB fast quenching permanent magnetism powder preparing technical field, emphasis relates to the method for oxidation such as Agglutinate neodymium-iron-boron NdFeB fast quenching permanent-magnet powder mobility, apparent density and residual crystalline solid.
Background technology
The defective workmanship of two aspects is there is: one is quick quenching band is suppressed in a kind of frock of press again classified sieve series to become the powder of desired particle size in Agglutinate neodymium-iron-boron NdFeB fast quenching permanent magnetism powder preparation process, at microscope, this powder particle sees that very irregular, burr are serious, the mobility of powder is poor, apparent density is low; The residual crystalline solid that two have when being in vacuum quick quenching operation splashing Mars to be splashed into material storage barrel produces, this microparticle there will be peeling drum blister phenomenon when making magnetic product degradation.
Summary of the invention
In order to solve the problem existing for background technology, the object of this invention is to provide one and can improve fast quenching permanent-magnet powder mobility, apparent density, stop the method for oxidation of residual crystalline solid peeling drum blister after fatigue uses in magnetic product simultaneously.
To achieve these goals, technical scheme of the present invention is achieved in that a kind of Agglutinate neodymium-iron-boron NdFeB fast quenching permanent magnetism powder method for oxidation, it comprises the steps: by weight by the rare earth metal of 12-25%, the boron of 0.9-1.3%, the zirconium of 4.8-5.4%, surplus is iron, carry out vacuum melting, broken, vacuum quick quenching, first pressing, vacuum crystallization and thermal treatment, obtain described permanent magnetism powder semi-finished product powder, described rare earth metal comprises weight portion 3-5% lanthanum cerium alloy, 15-25% praseodymium neodymium closes house, described permanent magnetism powder semi-finished product powder is entered oxidizing chamber and is oxidized by steam humidification, oxidizing temperature is 80 DEG C, relative humidity 70%, enter drying chamber with the speed transmission of 0.2m ∕ min after oxidation to dry, described oven dry indoor temperature is 100 DEG C-120 DEG C, and drying time is 25min, then described semi-finished product powder is carried out vibration sub-sieve, filter out and meet granularity requirements and be dry permanent magnetism powder semi-finished product powder.
Further, described rare earth metal comprises lanthanum, cerium, praseodymium, neodymium.
Further, described lanthanum, cerium, praseodymium, neodymium are obtained by praseodymium neodymium 25:75 alloy and lanthanum cerium 35:65 alloy.
Further, the screen plane specification that described vibration sub-sieve operation is selected is 80cm × 65cm, and mesh specification is 100 orders.
The present invention has following beneficial effect: 1, Agglutinate neodymium-iron-boron PrNd fast quenching forever magnetic powder completely eliminate by hot and humid process the problem that edge is irregular, burr is serious, adopt proving flowmeter and apparent density instrument repeatedly to test discovery: mobility 1.0-1.1g ∕ s, the apparent density 2.8-2.9 ∕ cm of powder before oxidation
3; Mobility 1.3-1.4g ∕ s, the apparent density 3.2-3.4 ∕ cm of powder after oxidation
3.Obviously, the powder after oxidation is high because of good fluidity, apparent density, improves magnet pressing machinery efficiency, and general mold pressing magnet brings up to 18-20 ∕ min after oxidation by 12-15 ∕ min before being oxidized; Because good fluidity, apparent density are high, the compactedness of powder in magnet mould is good, packing is high, and product multipole magnetization rear perimeter edge magnetic field intensity uniformity is good.2, powder completely eliminates the residual crystalline solid in powder by hot and humid process, and the magnet made there will not be peeling drum blister phenomenon, extends the service life of neodymium iron boron magnetic body, improves serviceability.
Detailed description of the invention
Embodiment 1: a kind of Agglutinate neodymium-iron-boron PrNd fast quenching permanent magnetism powder method for oxidation, be iron by the rare earth metal of 25%, the boron of 0.9%, zirconium, the surplus of 4.8% by weight, carry out vacuum melting, fragmentation, vacuum quick quenching, first pressing, vacuum crystallization and thermal treatment, obtained NdFeB permanet magnetic powder semi-finished product powder, by NdFeB permanet magnetic powder semi-finished product powder described after crystallization by hot and humid, described NdFeB permanet magnetic powder semi-finished product powder burrs on edges is come off, remains crystalline solid complete oxidation.Described Agglutinate neodymium-iron-boron PrNd fast quenching permanent magnetism powder oxidation operation flow process comprises: material loading-pave-steam humidification-oven dry-vibration sub-sieve-detection-packaging.NdFeB permanet magnetic powder semi-finished product powder is added material bin, then will expect that evenly tiling on a moving belt by microcomputerized control, paving thickness is within 1mm, then material is sent into oxidation generation chamber with the speed of 0.2m/min by conveyer belt, described steam humidification operation completes in described oxidizing chamber, humidification, oxidation under the control of steam generator, and the temperature in described oxidation generation chamber is 80 DEG C, relative humidity is 70%, and humidification standard makes described NdFeB permanet magnetic powder moistening but do not contain aqueous water.Powder is sent into drying chamber at described conveyer belt with the speed of 0.2m ∕ min and is completed baking operation by next step, and described oven dry indoor temperature is 100 DEG C, and drying time is 25min.Next step vibrates sub-sieve, and the screen plane specification of described vibration sub-sieve operation is 80cm × 65cm, and mesh specification is 100 orders, will meet granularity requirements and is that dry powder falls into main material collecting barrel, does not meet granularity requirements or does not have dry powder to fall into secondary material collecting barrel.Be finally that magnetic property and humidity detection are carried out to the NdFeB permanet magnetic powder in main material collecting barrel, carry out multiple batches of unified batch mixing, guarantee that properties of product are consistent, up-to-standard, packaging warehouse-in.
Embodiment 2: a kind of Agglutinate neodymium-iron-boron PrNd fast quenching permanent magnetism powder method for oxidation, by weight by the rare earth metal of 12%, the boron of 1.3%, the zirconium of 5.4%, surplus is iron, carry out vacuum melting, broken, vacuum quick quenching, first pressing, vacuum crystallization and thermal treatment, obtained NdFeB permanet magnetic powder semi-finished product powder, NdFeB permanet magnetic powder semi-finished product powder is added material bin, then material is sent into oxidation generation chamber with the speed of 0.2m/min by conveyer belt, described steam humidification operation completes in described oxidizing chamber, humidification under the control of steam generator, oxidation, temperature in described oxidation generation chamber is 80 DEG C, relative humidity is 70%, humidification standard makes described NdFeB permanet magnetic powder moistening but do not contain aqueous water.Powder is sent into drying chamber at described conveyer belt with the speed of 0.2m ∕ min and is completed baking operation by next step, and described oven dry indoor temperature is 110 DEG C, and drying time is 25min.Next step vibrates sub-sieve, to granularity requirements be met and be that dry powder falls into main material collecting barrel, magnetic property and humidity detection are carried out to the NdFeB permanet magnetic powder in main material collecting barrel, carries out multiple batches of unified batch mixing, guarantee that properties of product are consistent, up-to-standard, packaging warehouse-in.
Embodiment 3: a kind of Agglutinate neodymium-iron-boron PrNd fast quenching permanent magnetism powder method for oxidation, by weight by the rare earth metal of 18.5%, the boron of 1.1%, the zirconium of 5.1%, surplus is iron, carry out vacuum melting, broken, vacuum quick quenching, first pressing, vacuum crystallization and thermal treatment, obtained NdFeB permanet magnetic powder semi-finished product powder, NdFeB permanet magnetic powder semi-finished product powder is evenly tiled on a moving belt, paving thickness is within 1mm, then material is sent into oxidation generation chamber with the speed of 0.2m/min by conveyer belt, described steam humidification operation completes in described oxidizing chamber, humidification under the control of steam generator, oxidation, temperature in described oxidation generation chamber is 80 DEG C, relative humidity is 70%, humidification standard makes described NdFeB permanet magnetic powder moistening but do not contain aqueous water.Powder is sent into drying chamber at described conveyer belt with the speed of 0.2m ∕ min and is completed baking operation by next step, and described oven dry indoor temperature is 120 DEG C, and drying time is 25min.Next step vibrates sub-sieve, to granularity requirements be met and be that dry powder falls into main material collecting barrel, magnetic property and humidity detection are carried out to the NdFeB permanet magnetic powder in main material collecting barrel, carries out multiple batches of unified batch mixing, guarantee that properties of product are consistent, up-to-standard, packaging warehouse-in.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (4)
1. an Agglutinate neodymium-iron-boron NdFeB fast quenching permanent magnetism powder method for oxidation, it comprises the steps: to be iron by the zirconium of the boron of the rare earth metal of 12-25%, 0.9-1.3%, 4.8-5.4%, surplus by weight, carry out vacuum melting, fragmentation, vacuum quick quenching, first pressing, vacuum crystallization and thermal treatment, obtain described permanent magnetism powder semi-finished product powder, it is characterized in that, described rare earth metal comprises weight portion 3-5% lanthanum cerium alloy, 15-25% praseodymium neodymium alloy, described permanent magnetism powder semi-finished product powder is entered oxidizing chamber and is oxidized by steam humidification, oxidizing temperature is 80 DEG C, relative humidity 70%; Enter drying chamber with the speed transmission of 0.2m ∕ min after oxidation to dry, described oven dry indoor temperature is 100 DEG C-120 DEG C, and drying time is 25min; Then described semi-finished product powder is carried out vibration sub-sieve, filter out and meet granularity requirements and be dry permanent magnetism powder semi-finished product powder.
2. a kind of Agglutinate neodymium-iron-boron NdFeB fast quenching permanent magnetism powder method for oxidation according to claim 1, it is characterized in that, described rare earth metal comprises lanthanum, cerium, praseodymium, neodymium.
3. a kind of Agglutinate neodymium-iron-boron NdFeB fast quenching permanent magnetism powder method for oxidation according to claim 2, it is characterized in that, described lanthanum, cerium, praseodymium, neodymium are obtained by praseodymium neodymium 25:75 alloy and lanthanum cerium 35:65 alloy.
4. a kind of Agglutinate neodymium-iron-boron NdFeB fast quenching permanent magnetism powder method for oxidation according to claim 1, it is characterized in that, the screen plane specification that described vibration sub-sieve operation is selected is 80cm × 65cm, and mesh specification is 100 orders.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098284A (en) * | 2016-08-11 | 2016-11-09 | 江苏巨鑫磁业有限公司 | A kind of preparation method of Nd Fe B alloys ultra-fine permanent magnetism powder |
| CN106957069A (en) * | 2017-05-04 | 2017-07-18 | 南通普瑞特机械有限公司 | Magnetic pre-processes oxidation furnaces |
| CN106992070A (en) * | 2017-04-10 | 2017-07-28 | 江苏品和天磁科技有限公司 | A kind of few rare earth permanent-magnetic material production aftertreatment technology and processing system |
| CN107116211A (en) * | 2017-03-21 | 2017-09-01 | 海安南京大学高新技术研究院 | NdFeB magnetic powder surface oxidation-resistant processing method |
| CN111390187A (en) * | 2020-03-12 | 2020-07-10 | 江苏巨鑫磁业有限公司 | Preparation method of permanent magnet powder by applying double-sided wet-warm oxidation treatment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6136100A (en) * | 1999-09-29 | 2000-10-24 | Magnequench International, Inc. | Rare-earth alloy powders for magnets and process for making magnets from rare-earth alloy powders |
| CN102274974A (en) * | 2011-06-01 | 2011-12-14 | 横店集团东磁股份有限公司 | Method for preparing nanocrystalline rare-earth permanent magnet alloy powder |
| CN103111624A (en) * | 2013-03-18 | 2013-05-22 | 江苏巨鑫磁业有限公司 | Preparation method of iron-based low-rare earth NdFeB rapid quenching permanent magnetic powder |
| EP2650886A1 (en) * | 2010-10-15 | 2013-10-16 | Ningbo Institute Of Material Technology And Engineering Chinese Academy of Sciences | High-corrosion resistant sintered ndfeb magnet and preparation method therefor |
| CN103990794A (en) * | 2014-06-10 | 2014-08-20 | 江苏巨鑫磁业有限公司 | Method for oxidizing residual crystalline solids of bonded neodymium iron boron rapid-quenching permanent magnetic powder |
| CN104240887A (en) * | 2014-09-12 | 2014-12-24 | 沈阳中北通磁科技股份有限公司 | Low-manganese-content neodymium-iron-boron permanent magnet and manufacturing method |
-
2015
- 2015-12-03 CN CN201510873525.0A patent/CN105478787A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6136100A (en) * | 1999-09-29 | 2000-10-24 | Magnequench International, Inc. | Rare-earth alloy powders for magnets and process for making magnets from rare-earth alloy powders |
| EP2650886A1 (en) * | 2010-10-15 | 2013-10-16 | Ningbo Institute Of Material Technology And Engineering Chinese Academy of Sciences | High-corrosion resistant sintered ndfeb magnet and preparation method therefor |
| CN102274974A (en) * | 2011-06-01 | 2011-12-14 | 横店集团东磁股份有限公司 | Method for preparing nanocrystalline rare-earth permanent magnet alloy powder |
| CN103111624A (en) * | 2013-03-18 | 2013-05-22 | 江苏巨鑫磁业有限公司 | Preparation method of iron-based low-rare earth NdFeB rapid quenching permanent magnetic powder |
| CN103990794A (en) * | 2014-06-10 | 2014-08-20 | 江苏巨鑫磁业有限公司 | Method for oxidizing residual crystalline solids of bonded neodymium iron boron rapid-quenching permanent magnetic powder |
| CN104240887A (en) * | 2014-09-12 | 2014-12-24 | 沈阳中北通磁科技股份有限公司 | Low-manganese-content neodymium-iron-boron permanent magnet and manufacturing method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098284A (en) * | 2016-08-11 | 2016-11-09 | 江苏巨鑫磁业有限公司 | A kind of preparation method of Nd Fe B alloys ultra-fine permanent magnetism powder |
| CN107116211A (en) * | 2017-03-21 | 2017-09-01 | 海安南京大学高新技术研究院 | NdFeB magnetic powder surface oxidation-resistant processing method |
| CN106992070A (en) * | 2017-04-10 | 2017-07-28 | 江苏品和天磁科技有限公司 | A kind of few rare earth permanent-magnetic material production aftertreatment technology and processing system |
| CN106957069A (en) * | 2017-05-04 | 2017-07-18 | 南通普瑞特机械有限公司 | Magnetic pre-processes oxidation furnaces |
| CN111390187A (en) * | 2020-03-12 | 2020-07-10 | 江苏巨鑫磁业有限公司 | Preparation method of permanent magnet powder by applying double-sided wet-warm oxidation treatment |
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Application publication date: 20160413 |