CN105575575A - Manufacturing method of neodymium iron boron magnet - Google Patents
Manufacturing method of neodymium iron boron magnet Download PDFInfo
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- CN105575575A CN105575575A CN201410530859.3A CN201410530859A CN105575575A CN 105575575 A CN105575575 A CN 105575575A CN 201410530859 A CN201410530859 A CN 201410530859A CN 105575575 A CN105575575 A CN 105575575A
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Abstract
The invention relates to a manufacturing method of a neodymium iron boron magnet so as to shorten the processing time of the neodymium iron boron magnet. The manufacturing method of the neodymium iron boron magnet comprises the following steps: preparing magnetic powder and putting the magnetic powder in a processing groove; pressurizing the magnetic powder in the processing groove through a high-speed compaction process, so that the magnetic powder reaches a movement speed of 130-260 m/s; and using the high-speed compaction process, so that the magnetic powder in the processing groove reaches a compaction density of more than 99%, wherein a magnetic powder body is formed after high-speed compaction of the magnetic powder is completed, and the magnetic powder body can be used for forming an isotropic neodymium iron boron hot-pressed magnet; or, carrying out thermal deformation processing on the magnetic powder body with the compaction density of more than 99%, so that the magnetic powder body is shaped into the isotropic neodymium iron boron magnet.
Description
Technical field
The invention relates to a kind of neodymium-iron-boron stone manufacture method, especially a kind of neodymium-iron-boron stone manufacture method using high-speed compaction processing procedure.
Background technology
Generally speaking, existing neodymium iron boron magnetite (Nd-Fe-BMagnet) manufacture method comprise sintered magnet processing procedure, mould rubber magnet journey made of stones, hot curing magnetite processing procedure, cementing molding process and hot forming processing procedure etc.Wherein, the product such as tropism's neodymium iron boron hot pressing magnetite (MQ Ι Ι) and anisotropy neodymium iron boron hot pressing magnetite (MQ Ι Ι I) such as use the neodymium iron boron magnetite made by hot forming processing procedure mainly to comprise, described neodymium iron boron hot pressing magnetite has high magnetic characteristic (maximum magnetic energy product can reach 30 ~ 50MGOe) and the easy magnetizing axis radially radiation of magnetite can be made to arrange by hot pressing processing procedure, therefore can for manufacturing the elongated annular magnetite being convenient to assemble.Moreover described annular magnetite, in the process of magnetizing, by changing position and the quantity of magnetizing coil, can change magnetize number of poles and magnetic declination.Accordingly, use the neodymium iron boron magnetite made by hot forming processing procedure can be widely used in the middle of the components such as various motor, generator, compressor, audio amplifier or magnetic bearing, the electronic assisted diversion motor (ElectricPowerSteering such as, adopted in electric motor car, EPS) namely height requirement is existed for anisotropy neodymium iron boron hot pressing magnetite, make one of hot forming processing procedure main flow manufacture method becoming neodymium iron boron magnetite in recent years.
Please refer to shown in Fig. 1, it is a kind of flow chart of neodymium-iron-boron stone manufacture method of existing utilization hot forming processing procedure, neodymium, iron, boron and other raw metal (such as: cobalt) are mainly melted (dissolving) and form metallic solution by the method, this sheet metal by (rapid-quenching) fast pure generation sheet metal, then can be pulverized (pulverizing) to prepare Magnaglo by described metallic solution.Then, the method sequentially adopt cold pressing (coldpressing) and hot pressing (hotpressing) processing procedure by Magnaglo compacting, make it form magnetic powder to promote Magnaglo density.Wherein, after hot pressing fabrication process, tropism's neodymium iron boron hot pressing magnetite such as can be configured as, only, the method can carry out thermal deformation (hotplasticdeforming) fabrication process with shaping anisotropy neodymium iron boron hot pressing magnetite to described tropism's neodymium iron boron hot pressing magnetite that waits again further.One embodiment of the neodymium-iron-boron stone manufacture method of above-mentioned utilization hot forming processing procedure has been exposed in the U.S. and discloses in the middle of No. 2010/0172783 " MATERIALFORANISOTROPICMAGNETANDMETHODOFMANUFACTURINGTHES AME " patent application case.
Wherein, above-mentioned processing procedure of colding pressing carries out initial compression usually, makes Magnaglo density reach 50-60%; And above-mentioned hot pressing processing procedure need be warming up to more than 500 DEG C usually pressurizes again, Magnaglo formation compacted density just can be made to reach the magnetic powder of more than 99%, tropism's neodymium iron boron hot pressing magnetite is waited to make, and the semi-finished product needed for being shaped as follow-up anisotropy neodymium iron boron hot pressing magnetite.But adopting colds pressing carries out compacting to Magnaglo respectively with hot pressing two step, will significantly increase the step complexity of the method, and the temperature-rise period of hot pressing processing procedure takes longer, causes the overall process overlong time of existing neodymium iron boron hot pressing magnetite.
On the other hand, because hot pressing processing procedure need be warming up to more than 500 DEG C, and the method waits tropism's neodymium iron boron hot pressing magnetite processing process with in the process of shaping anisotropy neodymium iron boron hot pressing magnetite by above-mentioned, also there is thermal deformation or other processing procedure that neodymium iron boron magnetite semi-finished product need be heated up, so repeatedly the intensification of neodymium iron boron magnetite semi-finished product can be made crystal grain-growth, and then cause the magnetic characteristic of neodymium iron boron magnetite finished product to decline.
Accordingly, prior art proposes to comprise discharge plasma sintering (sparkplasmasinterin, SPS) or the magnetite molding process such as two-stage hot forming to replace above-mentioned thermal deformation processing procedure, avoid repeatedly heating up to neodymium iron boron hot pressing magnetite semi-finished product and causing crystal grain-growth.But the processing cost of described magnetite molding process is high, the magnetic characteristic of neodymium iron boron hot pressing magnetite finished product and production cost is caused often to be difficult to take into account.
Because rise, need the neodymium-iron-boron stone manufacture method that a kind of further improvement is provided badly, to improve the shortcoming of the overall process overlong time of existing neodymium iron boron hot pressing magnetite, solve simultaneously and use hot pressing processing procedure repeatedly to be heated up by neodymium iron boron magnetite semi-finished product and to make crystal grain-growth, and then the problem causing the magnetic characteristic of neodymium iron boron magnetite finished product to decline.
Summary of the invention
The object of one embodiment of the invention is to provide a kind of neodymium-iron-boron stone manufacture method, by high-speed compaction processing procedures such as electromagnetism compacting or explosive compactions, the Magnaglo in one processing groove is pressurizeed, to replace colding pressing and heat-press step of the manufacture method of existing neodymium iron boron magnetite, described high-speed compaction processing procedure orders about the translational speed that this Magnaglo produces 130-260m/s, the Magnaglo in this processing groove is made to reach the compacted density of more than 99%, the processing time of neodymium iron boron magnetite can be shortened, reach the effect of the volume production efficiency promoting neodymium iron boron magnetite.
Another object of one embodiment of the invention is to provide a kind of neodymium-iron-boron stone manufacture method, within the short time, the compacted density of Magnaglo is promoted by high-speed compaction processing procedure, avoid Magnaglo that the situation of crystal grain-growth occurs in compacting process, and by clashing into the die break refinement making Magnaglo, the effect of the magnetic characteristic promoting neodymium iron boron magnetite can be had in high-speed compaction processing procedure.
An object again of one embodiment of the invention is to provide a kind of neodymium-iron-boron stone manufacture method, by high-speed compaction processing procedure to the Magnaglo pressurization in this processing groove, again thermal deformation processing procedure is carried out to the magnetic powder that compacted density reaches more than 99%, to form anisotropy neodymium iron boron magnetite, can avoid repeatedly neodymium iron boron magnetite semi-finished product being heated up, improve the magnetic characteristic of anisotropy neodymium iron boron magnetite finished product with the situation slowing down crystal grain-growth further.
For reaching aforementioned object, the technology contents that the present invention uses includes:
A kind of neodymium-iron-boron stone manufacture method, comprises: prepare a kind of Magnaglo and this Magnaglo is inserted a processing groove; By high-speed compaction processing procedure to the Magnaglo pressurization in this processing groove, this Magnaglo is made to reach the translational speed of 130-260m/s; And utilize above-mentioned high-speed compaction processing procedure, make the Magnaglo in this processing groove reach more than 99% compacted density, described Magnaglo forms a magnetic powder after completing high-speed compaction, and this magnetic powder can wait tropism's neodymium iron boron hot pressing magnetite in order to formation.
Neodymium-iron-boron stone manufacture method of the present invention, wherein, magnetic powder compacted density being reached to more than 99% carries out thermal deformation processing procedure, makes this magnetic powder be configured as anisotropy neodymium iron boron magnetite.
Neodymium-iron-boron stone manufacture method of the present invention, wherein, this high-speed compaction processing procedure is electromagnetism compacting processing procedure.
Neodymium-iron-boron stone manufacture method of the present invention, wherein, this electromagnetism compacting processing procedure uses an electromagnetism compaction apparatus to perform, this electromagnetism compaction apparatus has a processing groove, this processing groove inside forms an accommodation space for this Magnaglo accommodating, this processing groove has the openend being communicated with this accommodation space, a block stamp stretches into this accommodation space by this openend, and this block stamp is electrically connected a flatwise coil group away from one end of this processing groove, by passing into electric current to this flatwise coil group, pour in the middle of this accommodation space to drive this block stamp, make this block stamp to the Magnaglo pressurization in the middle of this accommodation space.
Neodymium-iron-boron stone manufacture method of the present invention, wherein, this high-speed compaction processing procedure is explosive compaction processing procedure.
Neodymium-iron-boron stone manufacture method of the present invention, wherein, this explosive compaction processing procedure uses an explosive compaction device to perform, this explosive compaction device has a processing groove, this processing groove inside forms an accommodation space for this Magnaglo accommodating, this processing groove has the openend being communicated with this accommodation space, a drift closes this accommodation space by this openend, and this explosive compaction device comprises an explosive cartridge, this explosive cartridge has a housing, this enclosure interior is for filling blasting substance, and two ends of this housing are respectively in conjunction with this drift and a lead-in wire, by the blasting substance in this housing of this cord detonates, pour in the middle of this accommodation space to drive this drift, make this drift to the Magnaglo pressurization in the middle of this accommodation space.
Neodymium-iron-boron stone manufacture method of the present invention, wherein, this thermal deformation processing procedure uses a thermal deformation device to perform, this thermal deformation device has a die, this die comprises the stock groove and a grooving that are interconnected, a drift can stretch in this stock groove, a knock pin is then incorporated into this grooving one end away from this stock groove, this stock groove is inserted by the magnetic powder such as tropism such as grade compacted density being reached more than 99%, and this die is heated to 750 ~ 900 DEG C, this stock groove is poured with this drift, these tropism's magnetic powders are made to produce deformation and be forced to enter in this grooving, and then be configured as a ring-type cup.
Neodymium-iron-boron stone manufacture method of the present invention, wherein, this thermal deformation processing procedure separately pressurizes to this knock pin, makes the ring-type cup formed in the middle of this grooving move to this stock groove from this grooving, to be taken out from this die by the ring-type cup completing thermal deformation field.
Accompanying drawing explanation
Fig. 1: the flow chart of the neodymium-iron-boron stone manufacture method of existing utilization hot forming processing procedure.
Fig. 2: the neodymium-iron-boron of the present invention schematic flow sheet making embodiment of the method made of stones.
Fig. 3: the neodymium-iron-boron of the present invention structural representation making the electromagnetism compaction apparatus that embodiment of the method adopts made of stones.
Fig. 4: Magnaglo is subject to the pressurize translational speed that produces of external force at high-speed compaction processing procedure and bears the contrast relationship figure of pressure with it.
Fig. 5: the neodymium-iron-boron of the present invention structural representation making the explosive compaction device that embodiment of the method adopts made of stones.
Fig. 6: the neodymium-iron-boron of the present invention structural representation making the thermal deformation device that embodiment of the method adopts made of stones.
(the present invention)
1 electromagnetism compaction apparatus
11 processing groove 111 openends
12 block stamps
13 flatwise coil groups
2 explosive compaction devices
21 processing groove 211 openends
22 drifts
23 explosive cartridge 231 housings
232 blasting substances 233 go between
3 thermal deformation devices
31 die 311 stock grooves
312 groovings
32 drifts
33 knock pins
R accommodation space R ' accommodation space
Tropism's magnetic powders such as P.
Embodiment
For above-mentioned and other object of the present invention, feature and advantage can be become apparent, preferred embodiment of the present invention cited below particularly, and coordinate accompanying drawing, be described in detail below:
" compacted density " of the magnetic powder described in the present invention in full, refer to that the density of a magnetic powder is reached a ratio value of its theoretical density (TheoreticalDensity) by compression, for example, one magnetic powder has the compacted density of 99%, referring to this magnetic powder and reached 99% of its theoretical density by compression, is that persond having ordinary knowledge in the technical field of the present invention is appreciated that.
Referring to shown in Fig. 2, is the schematic flow sheet of neodymium-iron-boron stone manufacture method one embodiment of the present invention.The embodiment of neodymium-iron-boron stone manufacture method of the present invention comprises following steps: to prepare a Magnaglo, previously prepared Magnaglo is inserted a processing groove by grinding or fragmentation magnetic material (such as: Nd-Fe-Co-B sheet metal).Wherein, this Magnaglo utilizes neodymium, iron, boron and other raw metal (such as: cobalt) to make, and the mode preparing this Magnaglo is person with usual knowledge in their respective areas of the present invention all can understand implementer easily, such as aforesaid US discloses No. 2010/0172783 patent application case and namely discloses wherein a kind of Magnaglo preparation method, therefore no longer ranks lift the preparation method that this Magnaglo is described in detail in detail.
By high-speed compaction processing procedure to the Magnaglo pressurization in this processing groove, this Magnaglo is made to reach the translational speed of 130-260m/s.In detail, described high-speed compaction processing procedure can be the high-speed compaction processing procedures such as electromagnetism compacting, explosive compaction or electric hydraulic compacting, for example, implement in aspect at one of the present embodiment, can by electromagnetism compacting processing procedure to the Magnaglo pressurization in this processing groove, please refer to shown in Fig. 3, be this electromagnetism compacting processing procedure arrange in pairs or groups use a kind of electromagnetism compaction apparatus 1, this electromagnetism compaction apparatus 1 has a processing groove 11, this processing groove 11 inside forms an accommodation space R, this accommodation space R and can supply an accommodating Magnaglo.This processing groove 11 has openend 111, block stamp 12 being communicated with this accommodation space R and stretches into this accommodation space R by this openend 111, and this block stamp 12 is electrically connected a flatwise coil group 13 away from one end of this processing groove 11.By this, when this flatwise coil group 13 passes into electric current, this block stamp 12 can be driven to pour in the middle of the accommodation space R of this processing groove 11 with high speed.Therefore, this block stamp 12 can pressurize to the Magnaglo in the middle of this accommodation space R, to reach high-speed compaction effect.
Shown in Fig. 4, be crystal grain external diameter be 45 ~ 74 μm and original density be the Magnaglo of 11.45g/cm3 in high-speed compaction processing procedure, be subject to the pressurize translational speed that produces of external force and bear the contrast relationship figure of pressure with it.It should be noted that this Magnaglo known needs to bear the pressure of 2.0 ~ 4.0Gpa, just can reach the compacted density of more than 99%.Wherein, the compacted density of described more than 99% refers to that this magnetic powder reaches 99% of theoretical density (TheoreticalDensity), for person with usual knowledge in their respective areas of the present invention can understand.Therefore, the translational speed that this magnetic powder produces 130-260m/s must be ordered about above by the step of high-speed compaction processing procedure to the Magnaglo pressurization in this processing groove 11, the pressure of 2.0 ~ 4.0Gpa can be applied, really to reach the effect to this Magnaglo compacting to this Magnaglo.Wherein, by current value, conduction time and energising frequency etc. that the flatwise coil group 13 of this electromagnetism compaction apparatus 1 of adjustment passes into, or change the parameters such as the flying distance of this block stamp 12, weight and sectional area, this Magnaglo can be made to reach the translational speed of the 130-260m/s met needed for the present embodiment, with the pressure to 2.0 ~ 4.0Gpa needed for this Magnaglo pressurization generation.
Utilize single or repeat above-mentioned high-speed compaction processing procedure, make the Magnaglo in this processing groove 11 reach the compacted density of more than 99%, namely described Magnaglo forms a magnetic powder after completing high-speed compaction.By this, namely the magnetic powder that compacted density reaches more than 99% forms iso magnetic powder, can wait tropism's neodymium iron boron magnetite finished product in order to formation.It can thus be appreciated that, compare existing MQ Ι Ι or other etc. tropism's neodymium iron boron hot pressing magnetite product must carry out initial compression by stating processing procedure of colding pressing to Magnaglo, Magnaglo density is made to reach 50-60%, and adopt hot pressing processing procedure Magnaglo to be warming up to more than 500 DEG C again to pressurize, Magnaglo just can be made to reach the compacted density of more than 99%, to form required product such as magnetite such as hot pressing such as neodymium iron boron such as tropism such as grade, neodymium-iron-boron of the present invention embodiment of the method for doing made of stones only needs Magnaglo to insert a processing groove, and by high-speed compaction processing procedure to the Magnaglo pressurization in this processing groove, tropism's neodymium iron boron magnetite such as can to form, effectively can shorten the processing time of neodymium iron boron magnetite.
Only, except can by above-mentioned electromagnetism compacting processing procedure journey in this processing groove Magnaglo pressurization except, in another enforcement aspect of the present embodiment, can by explosive compaction processing procedure to the Magnaglo pressurization in this processing groove, please refer to shown in Fig. 5, be this explosive compaction processing procedure arrange in pairs or groups use a kind of explosive compaction device 2, this explosive compaction device 2 has a processing groove 21 equally, this processing groove 21 inside forms an accommodation space R ', this accommodation space R ' and can supply an accommodating Magnaglo.This processing groove 21 has openend 211, drift 22 being communicated with this accommodation space R ' and closes this accommodation space R ' by this openend 211.In addition, this explosive compaction device 2 comprises an explosive cartridge 23, this explosive cartridge 23 has a housing 231, this housing 231 inside can supply filling blasting substance 232, and two ends of this housing 231 are respectively in conjunction with this drift 22 and a lead-in wire 233, make this blasting substance 232 can contact this drift 22 and this lead-in wire 233 respectively.By this, when this lead-in wire 233 utilizes the blasting substance 232 in voltage or this housing 231 of high thermal initiation, this drift 22 can be driven to pour in the middle of the accommodation space R ' of this processing groove 21 with high speed, this drift 22 can be pressurizeed to the Magnaglo in the middle of this accommodation space R ', to reach high-speed compaction effect.Wherein, by the adjustment kind of this blasting substance 232, component ratio or the area changing this drift 22, can guarantee that this Magnaglo reaches the translational speed of the 130-260m/s met needed for the present embodiment equally, with the pressure to 2.0 ~ 4.0Gpa needed for this Magnaglo pressurization generation.Accordingly, neodymium-iron-boron of the present invention embodiment of the method for doing made of stones can by electromagnetism compacting, explosive compaction or other high-speed compaction processing procedure (such as: electric hydraulic compacting) to the Magnaglo pressurization in this processing groove, and the present invention is not as limit.
Please continue with reference to shown in Fig. 1, neodymium-iron-boron of the present invention is made of stones makes embodiment of the method above high-speed compaction processing procedure, after making the Magnaglo in this processing groove reach the compacted density of more than 99%, namely described magnetic powder forms this magnetic powder, the neodymium-iron-boron stone manufacture method of this embodiment can carry out thermal deformation processing procedure to the magnetic powder that compacted density reaches more than 99%, makes it form anisotropy neodymium iron boron magnetite.In more detail, shown in Fig. 6, be this thermal deformation processing procedure arrange in pairs or groups use a kind of thermal deformation device 3, this thermal deformation device 3 has a die 31, this die 31 comprises stock groove 311 and the grooving 312 be interconnected, the sectional area of this grooving 312 can be less than the sectional area of this stock groove 311, and a drift 32 can stretch in this stock groove 311, and a knock pin 33 is incorporated into this grooving 312 one end away from this stock groove 311.
Above structure, neodymium-iron-boron of the present invention made of stones as embodiment of the method be by use abovementioned steps produce first-class tropism's magnetic powder P that compacted density reaches more than 99% and insert between this drift 32 and knock pin 33, and this die 31 is heated to 750 ~ 900 DEG C, the P such as magnetic powder such as tropism such as grade that compacted density reaches more than 99% is poured with this drift 32, make these tropism's magnetic powders P produce deformation be forced to enter in this grooving 312, and then be configured as a ring-type cup and reach thermal deformation field.Finally, after this drift 32 exits this stock groove 311, this knock pin 33 is pressurizeed, makes the ring-type cup formed in the middle of this grooving 312 move to this stock groove 311 from this grooving 312, the ring-type cup completing thermal deformation field can be taken out from this die 31.Described compacted density reaches the P such as magnetic powder such as tropism such as grade of more than 99% by after this thermal deformation fabrication process, and the ring-type cup formed is an anisotropy neodymium iron boron magnetite.Compare existing MQ Ι Ι I or other anisotropy neodymium iron boron hot pressing magnetite product in manufacturing process, need be heated up by hot pressing processing procedure and the multiple tracks heating step such as thermal deformation processing procedure intensification, repeatedly neodymium iron boron magnetite semi-finished product are heated up and make crystal grain-growth, the magnetic characteristic of anisotropy neodymium iron boron magnetite finished product is easily caused to decline, neodymium-iron-boron of the present invention embodiment of the method for doing made of stones only needs by high-speed compaction processing procedure the Magnaglo pressurization in this processing groove, again thermal deformation processing procedure is carried out to the magnetic powder completing high-speed compaction, anisotropy neodymium iron boron magnetite can be formed, effectively can improve the magnetic characteristic of anisotropy neodymium iron boron magnetite finished product.
By the method characteristic front taken off, the neodymium-iron-boron of the present invention main feature making embodiment of the method made of stones is:
Magnaglo in one processing groove is pressurizeed, to replace colding pressing and heat-press step of the manufacture method of existing neodymium iron boron magnetite by high-speed compaction processing procedures such as electromagnetism compacting or explosive compactions.Described high-speed compaction processing procedure orders about the translational speed that this Magnaglo produces 130-260m/s, the Magnaglo in this processing groove is made to reach the theoretical density of more than 99%, namely described Magnaglo forms a magnetic powder after completing high-speed compaction, by this, the magnetic powder that compacted density reaches more than 99% such as can to form at tropism's neodymium iron boron magnetite, or again thermal deformation processing procedure is carried out to the magnetic powder that compacted density reaches 99%, make it form anisotropy neodymium iron boron magnetite.Because high-speed compaction processing procedure significantly can promote the compacted density of Magnaglo at short notice, and high-speed compaction processing procedure can complete at normal temperatures, the heating-up time needed for hot pressing processing procedure need not be expended, therefore neodymium-iron-boron of the present invention is made of stones makes the processing time that embodiment of the method effectively can shorten neodymium iron boron magnetite, and lifting waits the volume production efficiency of the neodymium iron boron magnetite such as tropism's neodymium iron boron magnetite or anisotropy neodymium iron boron magnetite really.
Moreover known grain size will affect the magnetic characteristic of neodymium iron boron magnetite, crystal grain more conference makes neodymium iron boron magnetite crystal grain rotation and mobile orientation in the process of magnetizing more become difficult, and then reduces the magnetic characteristic of its finished product.Above-mentioned high-speed compaction processing procedure promotes the compacted density of Magnaglo within the short time, can avoid Magnaglo that the situation of crystal grain-growth occurs in compacting process, and can by clashing into the die break refinement making Magnaglo in high-speed compaction processing procedure, with the neodymium-iron-boron stone manufacture method of existing utilization hot forming processing procedure, crystal grain external diameter after Magnaglo completes hot pressing processing procedure is about 50 ~ 300 μm, and the crystal grain external diameter of the magnetic powder pressurizeed by high-speed compaction is about 5 ~ 15um, accordingly, neodymium-iron-boron of the present invention is made of stones makes effect that embodiment of the method has the magnetic characteristic promoting neodymium iron boron magnetite really.
On the other hand, neodymium-iron-boron of the present invention embodiment of the method for doing made of stones only needs by high-speed compaction processing procedure the Magnaglo pressurization in this processing groove, again to completing high-speed compaction and the magnetic powder that compacted density reaches more than 99% carries out thermal deformation processing procedure, anisotropy neodymium iron boron magnetite can be formed, compare existing MQ Ι Ι I or other anisotropy neodymium iron boron hot pressing magnetite product in manufacturing process, need be heated up by hot pressing processing procedure and the multiple tracks heating step such as thermal deformation processing procedure intensification, repeatedly neodymium iron boron magnetite semi-finished product are heated up, cause the situation of crystal grain-growth serious, neodymium-iron-boron of the present invention embodiment of the method for doing made of stones is utilized to make the situation that anisotropy neodymium iron boron magnetite significantly can slow down crystal grain-growth really, make the effect of the magnetic characteristic improving anisotropy neodymium iron boron magnetite finished product relatively remarkable.
In addition, the processing groove 11,21 that neodymium-iron-boron of the present invention is made of stones makes electromagnetism compaction apparatus 1 that embodiment of the method adopts or explosive compaction device 2 all forms confined space, therefore, it is possible to produce the adiabatic temperature of more than 500 DEG C in high-speed compaction process, utilize this temperature that the rich neodymium phase (Nd-richphase) of this Magnaglo can be made to form molten condition and melt out grain surface, be conducive to promoting the effect of crystal grain rotation and mobile orientation in successive process, increase the magnetic characteristic of neodymium iron boron magnetite finished product further.
In sum, neodymium-iron-boron of the present invention embodiment of the method for doing made of stones, by utilization high-speed compaction processing procedure, really can reach the processing time of shortening neodymium iron boron magnetite to promote the effects such as the magnetic characteristic of volume production efficiency and lifting neodymium iron boron magnetite.
Claims (8)
1. a neodymium-iron-boron stone manufacture method, is characterized in that, comprises:
Prepare a kind of Magnaglo and this Magnaglo is inserted a processing groove;
By high-speed compaction processing procedure to the Magnaglo pressurization in this processing groove, this Magnaglo is made to reach the translational speed of 130-260m/s; And
Utilize above-mentioned high-speed compaction processing procedure, make the Magnaglo in this processing groove reach the compacted density of more than 99%, described Magnaglo forms a magnetic powder after completing high-speed compaction, and this magnetic powder can wait tropism's neodymium iron boron hot pressing magnetite in order to formation.
2. neodymium-iron-boron stone manufacture method according to claim 1, is characterized in that, magnetic powder compacted density being reached to more than 99% carries out thermal deformation processing procedure, makes this magnetic powder be configured as anisotropy neodymium iron boron magnetite.
3. neodymium-iron-boron stone manufacture method according to claim 1 and 2, is characterized in that, this high-speed compaction processing procedure is electromagnetism compacting processing procedure.
4. neodymium-iron-boron stone manufacture method according to claim 3, it is characterized in that, this electromagnetism compacting processing procedure uses an electromagnetism compaction apparatus to perform, this electromagnetism compaction apparatus has a processing groove, this processing groove inside forms an accommodation space for this Magnaglo accommodating, this processing groove has the openend being communicated with this accommodation space, a block stamp stretches into this accommodation space by this openend, and this block stamp is electrically connected a flatwise coil group away from one end of this processing groove, by passing into electric current to this flatwise coil group, pour in the middle of this accommodation space to drive this block stamp, make this block stamp to the Magnaglo pressurization in the middle of this accommodation space.
5. neodymium-iron-boron stone manufacture method according to claim 1 and 2, is characterized in that, this high-speed compaction processing procedure is explosive compaction processing procedure.
6. neodymium-iron-boron stone manufacture method according to claim 5, it is characterized in that, this explosive compaction processing procedure uses an explosive compaction device to perform, this explosive compaction device has a processing groove, this processing groove inside forms an accommodation space for this Magnaglo accommodating, this processing groove has the openend being communicated with this accommodation space, a drift closes this accommodation space by this openend, and this explosive compaction device comprises an explosive cartridge, this explosive cartridge has a housing, this enclosure interior is for filling blasting substance, and two ends of this housing are respectively in conjunction with this drift and a lead-in wire, by the blasting substance in this housing of this cord detonates, pour in the middle of this accommodation space to drive this drift, make this drift to the Magnaglo pressurization in the middle of this accommodation space.
7. neodymium-iron-boron stone manufacture method according to claim 2, it is characterized in that, this thermal deformation processing procedure uses a thermal deformation device to perform, this thermal deformation device has a die, this die comprises the stock groove and a grooving that are interconnected, a drift can stretch in this stock groove, a knock pin is then incorporated into this grooving one end away from this stock groove, this stock groove is inserted by the magnetic powder such as tropism such as grade compacted density being reached more than 99%, and this die is heated to 750 ~ 900 DEG C, this stock groove is poured with this drift, these tropism's magnetic powders are made to produce deformation and be forced to enter in this grooving, and then be configured as a ring-type cup.
8. neodymium-iron-boron stone manufacture method according to claim 7, it is characterized in that, this thermal deformation processing procedure separately pressurizes to this knock pin, makes the ring-type cup formed in the middle of this grooving move to this stock groove from this grooving, to be taken out from this die by the ring-type cup completing thermal deformation field.
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| CN201410530859.3A CN105575575A (en) | 2014-10-10 | 2014-10-10 | Manufacturing method of neodymium iron boron magnet |
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| CN201410530859.3A CN105575575A (en) | 2014-10-10 | 2014-10-10 | Manufacturing method of neodymium iron boron magnet |
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|---|---|---|---|
| CN201410530859.3A Pending CN105575575A (en) | 2014-10-10 | 2014-10-10 | Manufacturing method of neodymium iron boron magnet |
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| Country | Link |
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| CN (1) | CN105575575A (en) |
Cited By (3)
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| CN108022743A (en) * | 2016-11-02 | 2018-05-11 | 财团法人金属工业研究发展中心 | Anisotropy magnetite manufacture method and magnetite manufacturing equipment |
| CN109158594A (en) * | 2018-08-29 | 2019-01-08 | 江苏全球康功能纺织品有限公司 | A kind of manufacture craft of health care magnetic stripe |
| WO2019010824A1 (en) * | 2017-07-10 | 2019-01-17 | 北京工业大学 | Thermal deformation mold with shear force and preparation method for neodymium-iron-boron magnet |
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| US20100034688A1 (en) * | 2006-11-21 | 2010-02-11 | Hiroshi Nagata | Method of manufacturing oriented body, molded body and sintered body as well as method of manufacturing permenant magnet |
| CN103035400A (en) * | 2011-09-29 | 2013-04-10 | 通用汽车环球科技运作有限责任公司 | Manufacture of near-net shaped rare-earth permanent magnet |
| CN103151159A (en) * | 2011-09-30 | 2013-06-12 | 通用汽车环球科技运作有限责任公司 | Method of making ND-FE-B sintered magnets with reduced dysprosium or terbium |
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| US20100034688A1 (en) * | 2006-11-21 | 2010-02-11 | Hiroshi Nagata | Method of manufacturing oriented body, molded body and sintered body as well as method of manufacturing permenant magnet |
| CN103035400A (en) * | 2011-09-29 | 2013-04-10 | 通用汽车环球科技运作有限责任公司 | Manufacture of near-net shaped rare-earth permanent magnet |
| CN103151159A (en) * | 2011-09-30 | 2013-06-12 | 通用汽车环球科技运作有限责任公司 | Method of making ND-FE-B sintered magnets with reduced dysprosium or terbium |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108022743A (en) * | 2016-11-02 | 2018-05-11 | 财团法人金属工业研究发展中心 | Anisotropy magnetite manufacture method and magnetite manufacturing equipment |
| WO2019010824A1 (en) * | 2017-07-10 | 2019-01-17 | 北京工业大学 | Thermal deformation mold with shear force and preparation method for neodymium-iron-boron magnet |
| CN109158594A (en) * | 2018-08-29 | 2019-01-08 | 江苏全球康功能纺织品有限公司 | A kind of manufacture craft of health care magnetic stripe |
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