CN103545075A - Method for manufacturing ultra-long orientation NdFeB sintered permanent magnet material - Google Patents
Method for manufacturing ultra-long orientation NdFeB sintered permanent magnet material Download PDFInfo
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- CN103545075A CN103545075A CN201310462479.6A CN201310462479A CN103545075A CN 103545075 A CN103545075 A CN 103545075A CN 201310462479 A CN201310462479 A CN 201310462479A CN 103545075 A CN103545075 A CN 103545075A
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Abstract
The invention discloses a method for manufacturing an ultra-long orientation NdFeB sintered permanent magnet material. The method includes the following operation steps that first, NdFeB boron alloy powder with the average particle size of 2-8 microns is manufactured through the smelting-pulverizing technology; second, the orientation length of each material blank to be pressed is calculated, the material blanks are divided into several parts, and the length of each part can meet requirements as long as the length for primary magnetic pressing forming is reached; third, the material blanks are pressed through the magnetic forming technology according to the calculated orientation length, and then the primary pressing is completed; fourth, a plurality of the material blanks after the primary forming are placed into a secondary pressing mold end to end in the orientation direction, pressure higher than primary pressing forming pressure is applied in the non-orientation direction, and the material blanks are combined to undergo secondary pressing; fifth, the material blanks after the secondary pressing are placed into a vacuum sintering furnace to be sintered, and the magnetic field orientation needs to be parallel with the gravity direction when the material blanks are sintered.
Description
Technical field
The present invention relates to NbFeB sintered permanent magnetic material field, be specifically related to the manufacture method that a kind of overlength is orientated NbFeB sintered permanent magnetic material.
Background technology
Sintered NdFeB, when making, need to enter the technical process of melting-powder process-pressing under magnetic field-sintering.Wherein, when pressed by powder becomes blank, complementary field to complete magnetic orientation, be called pressing under magnetic field.During moulding, the magnetic property after magnet moulding has been improved in additional magnetic field, but because compressing magnetic field penetration power, when compacting can form stress and the restriction general technology such as concentrate can only make the magnet of direction of orientation about 50mm in blank.
Summary of the invention
The object of the present invention is to provide a kind of overlength to be orientated the manufacture method of NbFeB sintered permanent magnetic material, to the blank after Primary field moulding carry out secondary compacting, during secondary compacting, pressing direction is non-magnetic field direction of orientation.
The technical solution adopted for the present invention to solve the technical problems is as follows:
Overlength is orientated a manufacture method for NbFeB sintered permanent magnetic material, includes following operating procedure:
1), by melting-flouring technology, make particle mean size 2-8 μ m neodymium iron boron boron alloy powder;
2), calculate the orientation length of the material base that will suppress, it is divided into some parts, every part of length reaches can the compressing length of Primary field;
3), according to pressing under magnetic field technique compacting blank for the orientation length after calculating, complete once compacting.
4), the one-time formed material base of polylith, according to the end to end mould of putting into secondary compacting of direction of orientation, in non-direction of orientation, apply the pressure when once compressing, combination material base carries out secondary compacting;
5), the material base of secondary compacting is put into and in vacuum sintering furnace, is carried out sintering, during sintering the magnetic field orientating direction of material base will with gravity direction keeping parallelism.
Beneficial effect of the present invention is as follows:
The present invention has changed the restriction of existing pressing under magnetic field technique, and a kind of method of making overlength orientation neodymium iron boron is provided.
Accompanying drawing explanation
Fig. 1 is material base pressing under magnetic field schematic diagram.
Fig. 2 is secondary compacting schematic diagram.
Embodiment
Referring to accompanying drawing, a kind of overlength is orientated the manufacture method of NbFeB sintered permanent magnetic material, includes following operating procedure:
1), by melting-flouring technology, make particle mean size 2-8 μ m neodymium iron boron boron alloy powder;
2), calculate the orientation length of the material base that will suppress, it is divided into some parts, every part of length reaches can the compressing length of Primary field;
3), according to pressing under magnetic field technique compacting blank for the orientation length after calculating, complete once compacting.
4), the one-time formed material base of polylith, according to the end to end mould of putting into secondary compacting of direction of orientation, in non-direction of orientation, apply the pressure when once compressing, combination material base carries out secondary compacting;
5), the material base of secondary compacting is put into and in vacuum sintering furnace, is carried out sintering, during sintering the magnetic field orientating direction of material base will with gravity direction keeping parallelism.
Claims (1)
1. overlength is orientated a manufacture method for NbFeB sintered permanent magnetic material, it is characterized in that, includes following operating procedure:
1), by melting-flouring technology, make particle mean size 2-8 μ m neodymium iron boron boron alloy powder;
2), calculate the orientation length of the material base that will suppress, it is divided into some parts, every part of length reaches can the compressing length of Primary field;
3), according to pressing under magnetic field technique compacting blank for the orientation length after calculating, complete once compacting;
4), the one-time formed material base of polylith, according to the end to end mould of putting into secondary compacting of direction of orientation, in non-direction of orientation, apply the pressure when once compressing, combination material base carries out secondary compacting;
5), the material base of secondary compacting is put into and in vacuum sintering furnace, is carried out sintering, during sintering the magnetic field orientating direction of material base will with gravity direction keeping parallelism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310462479.6A CN103545075A (en) | 2013-09-30 | 2013-09-30 | Method for manufacturing ultra-long orientation NdFeB sintered permanent magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310462479.6A CN103545075A (en) | 2013-09-30 | 2013-09-30 | Method for manufacturing ultra-long orientation NdFeB sintered permanent magnet material |
Publications (1)
| Publication Number | Publication Date |
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| CN103545075A true CN103545075A (en) | 2014-01-29 |
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| CN201310462479.6A Pending CN103545075A (en) | 2013-09-30 | 2013-09-30 | Method for manufacturing ultra-long orientation NdFeB sintered permanent magnet material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299140A (en) * | 1999-12-09 | 2001-06-13 | 住友特殊金属株式会社 | Method and device for supplying magnetic powder, and magnet mfg. method |
| CN1687470A (en) * | 2005-05-18 | 2005-10-26 | 西北有色金属研究院 | Method for preparing Nd-Fe-B alloys by using waste |
| CN1696324A (en) * | 2005-05-18 | 2005-11-16 | 西北有色金属研究院 | Heat-resistant Nd-Fe-B alloys material with high application temperature, and preparation method |
| CN1753113A (en) * | 2005-09-01 | 2006-03-29 | 上海交通大学 | Method of magnetic material solidification orientation in magnetic field based on critical condition |
| CN101364465A (en) * | 2008-06-06 | 2009-02-11 | 浙江西子富沃德电机有限公司 | Permanent magnetic RE material and preparation thereof |
| CN102233428A (en) * | 2011-06-23 | 2011-11-09 | 宁波韵升股份有限公司 | Method for preparing bulk sintered Nd-Fe-B permanent magnet material |
-
2013
- 2013-09-30 CN CN201310462479.6A patent/CN103545075A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299140A (en) * | 1999-12-09 | 2001-06-13 | 住友特殊金属株式会社 | Method and device for supplying magnetic powder, and magnet mfg. method |
| CN1687470A (en) * | 2005-05-18 | 2005-10-26 | 西北有色金属研究院 | Method for preparing Nd-Fe-B alloys by using waste |
| CN1696324A (en) * | 2005-05-18 | 2005-11-16 | 西北有色金属研究院 | Heat-resistant Nd-Fe-B alloys material with high application temperature, and preparation method |
| CN1753113A (en) * | 2005-09-01 | 2006-03-29 | 上海交通大学 | Method of magnetic material solidification orientation in magnetic field based on critical condition |
| CN101364465A (en) * | 2008-06-06 | 2009-02-11 | 浙江西子富沃德电机有限公司 | Permanent magnetic RE material and preparation thereof |
| CN102233428A (en) * | 2011-06-23 | 2011-11-09 | 宁波韵升股份有限公司 | Method for preparing bulk sintered Nd-Fe-B permanent magnet material |
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Application publication date: 20140129 |