CN108962541A - A kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method - Google Patents
A kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method Download PDFInfo
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- CN108962541A CN108962541A CN201810816663.9A CN201810816663A CN108962541A CN 108962541 A CN108962541 A CN 108962541A CN 201810816663 A CN201810816663 A CN 201810816663A CN 108962541 A CN108962541 A CN 108962541A
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- permanent magnetism
- magnetism powder
- vacuum aging
- powder vacuum
- demagnetization
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
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- Power Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention provides a kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method, it is characterized in that: Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method successively includes stocking process, water flowing energization process in furnace, vacuumizes process, heat temperature raising process, inert gas fire-resisting protection process, rewinding process, demagnetization rate detection process；It vacuumizes process and reaches 8 × 10‑3Pa, heat temperature raising process are heated to 155 ± 3 DEG C, and inert gas fire-resisting protection process is to reach 8 × 10 vacuumizing process‑3Krypton is filled under Pa air pressure to 0.35 ± 0.4 Pa progress fire-resisting protection.Have the beneficial effect that: by meeting after permanent magnetism powder production magnetic patch, so that permanent magnet is taken, magnetic is highly stable after demagnetization, the strong magnetic energy of permanent magnetism components is maintained, so that electronic product reaches the requirement of anticipation.
Description
Technical field
The present invention relates to magnetic industry, and in particular to a kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method.
Background technique
With the fast development of high-tech industry, NdFeB permanet magnetic powder be widely used in Aeronautics and Astronautics, navigation, automobile and
Various precision instruments, middle-size and small-size, micro high efficiency motor, computer and IT technical equipment, business automation equipment and numerous households
The fields such as electric appliance, and constantly expanding.
Permanent magnetism powder is made into rotating machinery: various miniature precision electric motors, generator by powder metallurgical technique, timer turns
Son, magnetic bearing etc..Witter is electromechanical: permanent magnet direct current motor, small-power ac motor, shaded-pole motor, walking motor.
Stereo set: loudspeaker, microphone control sound device, buzzer etc..Instrument and meter: electron tube magnetron, travelling-wave tubes, backward wave tube,
Klystron etc., magnetic control plating etc..Measure communication control equipment: sensor, relay, instrument, computer and its peripheral equipment etc..
Household electrical appliance: refrigerator, air-conditioning, television set, dust catcher and video and audio recording equipment etc..Office and other: facsimile machine, telephone set are multiple
Print machine, scanning machine, medical equipment.
However, the high speed that the existing permanent magnetism for having permanent magnetism powder to be made will cause magnetic property after prolonged use is degenerated,
Loss of excitation is caused, is caused such the reason is that because the demagnetization of the raw material permanent magnetism powder of permanent magnets is not thorough, because permanent magnetism powder demagnetization is not
Thoroughly sintering be made permanent magnetism it is fast after magnetize to permanent magnets the magnetic of taking in magnetic patch will be made to form disorderly magnetic, it is secondary to be unevenly distributed
It is even, the increase of product power consumption is in turn resulted in, fever temperature rise increases, and accelerates the aging regression vicious circle of electric elements.Therefore, study
A kind of permanent magnetism powder stable scheme of demagnetizing is extremely urgent.
Summary of the invention
The present invention provides a kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing methods.
Goal of the invention is: by permanent magnetism powder demagnetization adequately demagnetized, after demagnetization by permanent magnetism powder production magnetic patch after meeting so that
Permanent magnet takes that magnetic is highly stable, the strong magnetic energy of permanent magnetism components is maintained, so that electronic product reaches making for anticipation
With requiring.
Technical solution: a kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method, it is characterized in that: the Nd Fe B alloys
Permanent magnetism powder vacuum aging demagnetizing method successively includes stocking process, water flowing energization process in furnace, vacuumizes process, heat temperature raising work
Sequence, inert gas fire-resisting protection process, rewinding process, demagnetization rate detect process；The process that vacuumizes reaches 8 × 10-3Pa, institute
That states heat temperature raising process is heated to 155 ± 3 DEG C, and the inert gas fire-resisting protection process is to vacuumize process described
Reach 8 × 10-3Krypton is filled under Pa air pressure to 0.35 ± 0.4 Pa progress fire-resisting protection.
Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method further includes demagnetization furnace apparatus correspondingly, the demagnetization kiln
Device includes furnace body, and lid connects hermetically sealed lid, loading plate, lead screw, air gauge, positive terminals, the negative terminals of the furnace body, described
Lead screw is screwed with the hermetically sealed lid, and the lower end of the lead screw is connect with the loading plate, and the edge of the loading plate, which is equipped with, to be slided
The inner wall of block, the sliding block and the furnace body is slidably connected, and the positive terminals, negative terminals connect with the outer wall of the furnace body
It connects, it is described hermetically sealed to be covered with the air gauge.
Beneficial effects of the present invention are as follows: in furnace water flowing energization process be using lead screw 4 drive loading plate 3 move down so that
Material on loading plate 3, which immerses in furnace bottom water, to be powered, and be powered and removes magnetic core, positive terminals 6, negative terminals 7 are for being powered, furnace
Wall is made of conductive metal.The heat temperature raising process is heated to 155 ± 3 DEG C, in suitable air pressure and indifferent gas
It is protected under body, avoids the oxidation of magnetic powder.This programme, using highly dense inert gas shielding, plus be powered and high temperature degaussing,
Go time effect excellent.Permanent magnetism powder demagnetization is adequately demagnetized, meeting is so that permanent magnet after permanent magnetism powder is made magnetic patch after demagnetization
It takes that magnetic is highly stable, the strong magnetic energy of permanent magnetism components is maintained, so that electronic product reaches the requirement of anticipation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of demagnetization furnace apparatus of the present invention.
Fig. 2 is that the lead screw 4 of demagnetization furnace apparatus of the present invention drives loading plate 3 to move down, so that the material on loading plate 3 soaks
Enter the schematic diagram being powered in furnace bottom water.
Specific embodiment
Further description is made to the present invention below in conjunction with attached drawing.
Fig. 1, in 2: furnace body 1, hermetically sealed lid 2, loading plate 3, lead screw 4, air gauge 5, positive terminals 6, negative terminals 7.
A kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method, it is characterized in that: the Nd Fe B alloys permanent magnetism powder is true
Empty aging demagnetizing method successively includes stocking process, water flowing energization process in furnace, vacuumizes process, heat temperature raising process, inertia
Gas fire-resisting protection process, rewinding process, demagnetization rate detect process；Stocking process will be to be demagnetized permanent magnetism powder be packed into loading plate
3 cover the process of hermetically sealed lid 2.Water flowing energization process is to drive loading plate 3 to move down using lead screw 4 in furnace, so that on loading plate 3
Material immerse in furnace bottom water and be powered, be powered and remove magnetic core, positive terminals 6, negative terminals 7 are for being powered, and furnace wall is using leading
Electric metal production.
The process that vacuumizes reaches 8 × 10-3Pa, the heat temperature raising process is heated to 155 ± 3 DEG C, described
Inert gas fire-resisting protection process is to reach 8 × 10 in the process that vacuumizes-3Krypton is filled under Pa air pressure to 0.35 ± 0.4
Pa carries out fire-resisting protection.It vacuumizes and is vacuumized with vacuum pump.By permanent magnetism powder in Krypton and 0.35 on the basis of above-mentioned
30~48min is kept to remove material under the air pressure of ± 0.4 Pa.The density of Krypton is larger, can settle well and furnace bottom, realizes
The high density of magnetic powder is protected.
Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method further includes demagnetization furnace apparatus correspondingly, the demagnetization kiln
Device includes furnace body 1, covers hermetically sealed lid 2, loading plate 3, lead screw 4, air gauge 5, the positive terminals 6, negative wiring for connecing the furnace body 1
End 7, the lead screw 4 is screwed with the hermetically sealed lid 2, and the lower end of the lead screw 4 is connect with the loading plate 3, the loading plate 3
Edge be equipped with sliding block 8, the inner wall of the sliding block 8 and the furnace body 1 is slidably connected, and the positive terminals 6, negative terminals 7 are
It is connect with the outer wall of the furnace body 1, the hermetically sealed lid 2 is equipped with the air gauge 5.
Claims (2)
1. a kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method, it is characterized in that: the Nd Fe B alloys permanent magnetism powder vacuum
Aging demagnetizing method successively includes stocking process, water flowing energization process in furnace, vacuumizes process, heat temperature raising process, indifferent gas
Body fire-resisting protection process, rewinding process, demagnetization rate detect process；The process that vacuumizes reaches 8 × 10-3Pa, the heating rise
Warm process is heated to 155 ± 3 DEG C, the inert gas fire-resisting protection process be it is described vacuumize process reach 8 ×
10-3Krypton is filled under Pa air pressure to 0.35 ± 0.4 Pa progress fire-resisting protection.
2. a kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method according to claim 1, it is characterized in that: neodymium iron boron
Alloy permanent magnetism powder vacuum aging demagnetizing method further includes demagnetization furnace apparatus correspondingly, and the demagnetization furnace apparatus includes furnace body
(1), lid connects the hermetically sealed lid (2) of the furnace body (1), loading plate (3), lead screw (4), air gauge (5), positive terminals (6), negative connects
Line end (7), the lead screw (4) screw with the hermetically sealed lid (2), and the lower end and the loading plate (3) of the lead screw (4) are even
It connects, the edge of the loading plate (3) is equipped with sliding block (8), and the sliding block (8) and the inner wall of the furnace body (1) are slidably connected, described
Positive terminals (6), negative terminals (7) are connect with the outer wall of the furnace body (1), and the hermetically sealed lid (2) is equipped with the air pressure
Table (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810816663.9A CN108962541A (en) | 2018-07-24 | 2018-07-24 | A kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method |
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| CN201810816663.9A CN108962541A (en) | 2018-07-24 | 2018-07-24 | A kind of Nd Fe B alloys permanent magnetism powder vacuum aging demagnetizing method |
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| CN108962541A true CN108962541A (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947965A (en) * | 2019-12-22 | 2020-04-03 | 安徽科元三维技术有限公司 | Metal 3D is demagnetization treatment facility for printer |
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| CN202717810U (en) * | 2012-07-30 | 2013-02-06 | 江苏巨鑫磁业有限公司 | Vacuum rapid quenching device for producing neodymium iron boron (NdFeB) magnetic materials |
| CN202945304U (en) * | 2012-11-08 | 2013-05-22 | 沈阳中北真空磁电科技有限公司 | Vacuum-induction smelting and rapid hardening equipment for rare-earth permanent-magnet alloy |
| CN103878380A (en) * | 2014-04-04 | 2014-06-25 | 江苏巨鑫磁业有限公司 | NdFeB magnetic material alloy rapid quenching furnace |
| CN105405573A (en) * | 2015-12-18 | 2016-03-16 | 上海洛克磁业有限公司 | Demagnetization method of sintered Nd-Fe-B |
| CN105424551A (en) * | 2015-12-01 | 2016-03-23 | 中磁科技股份有限公司 | Equipment and method for measuring density of sintered NdFeB blank |
| 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 |
| CN107464645A (en) * | 2017-09-16 | 2017-12-12 | 江苏新旭磁电科技有限公司 | A kind of preparation method of the ultra-fine permanent magnetism powder of low demagnetization rate neodymium iron boron NdFeB alloys |
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2018
- 2018-07-24 CN CN201810816663.9A patent/CN108962541A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202717810U (en) * | 2012-07-30 | 2013-02-06 | 江苏巨鑫磁业有限公司 | Vacuum rapid quenching device for producing neodymium iron boron (NdFeB) magnetic materials |
| CN202945304U (en) * | 2012-11-08 | 2013-05-22 | 沈阳中北真空磁电科技有限公司 | Vacuum-induction smelting and rapid hardening equipment for rare-earth permanent-magnet alloy |
| CN103878380A (en) * | 2014-04-04 | 2014-06-25 | 江苏巨鑫磁业有限公司 | NdFeB magnetic material alloy rapid quenching furnace |
| CN105424551A (en) * | 2015-12-01 | 2016-03-23 | 中磁科技股份有限公司 | Equipment and method for measuring density of sintered NdFeB blank |
| CN105405573A (en) * | 2015-12-18 | 2016-03-16 | 上海洛克磁业有限公司 | Demagnetization method of sintered Nd-Fe-B |
| 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 |
| CN107464645A (en) * | 2017-09-16 | 2017-12-12 | 江苏新旭磁电科技有限公司 | A kind of preparation method of the ultra-fine permanent magnetism powder of low demagnetization rate neodymium iron boron NdFeB alloys |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947965A (en) * | 2019-12-22 | 2020-04-03 | 安徽科元三维技术有限公司 | Metal 3D is demagnetization treatment facility for printer |
| CN110947965B (en) * | 2019-12-22 | 2021-09-03 | 安徽科元三维技术有限公司 | Metal 3D is demagnetization treatment facility for printer |
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