CN115376810B - Magnetic material with high magnetic stability and production process thereof - Google Patents
Magnetic material with high magnetic stability and production process thereof Download PDFInfo
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- CN115376810B CN115376810B CN202211067170.2A CN202211067170A CN115376810B CN 115376810 B CN115376810 B CN 115376810B CN 202211067170 A CN202211067170 A CN 202211067170A CN 115376810 B CN115376810 B CN 115376810B
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- 239000000696 magnetic material Substances 0.000 title claims abstract description 47
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229910052739 hydrogen Inorganic materials 0.000 claims description 88
- 239000001257 hydrogen Substances 0.000 claims description 88
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 81
- 210000004177 elastic tissue Anatomy 0.000 claims description 39
- 238000007493 shaping process Methods 0.000 claims description 28
- 239000002994 raw material Substances 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 21
- 239000012634 fragment Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 230000005389 magnetism Effects 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000002309 gasification Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 25
- 206010024796 Logorrhoea Diseases 0.000 description 18
- 239000000126 substance Substances 0.000 description 9
- 238000005984 hydrogenation reaction Methods 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 6
- 241001391944 Commicarpus scandens Species 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000005292 diamagnetic effect Effects 0.000 description 2
- 230000005293 ferrimagnetic effect Effects 0.000 description 2
- 230000005298 paramagnetic effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005290 antiferromagnetic effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940085805 fiberall Drugs 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- 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
- H01F41/02—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 for manufacturing cores, coils, or magnets
- H01F41/0253—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 for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The application discloses a magnetic material with high magnetic stability and a production process thereof, which are applied to the field of magnet manufacturing.
Description
Technical Field
The application relates to the field of magnetic materials, in particular to a magnetic material with high magnetic stability and a production process thereof.
Background
Materials that react in some way to a magnetic field are called magnetic materials. Substances can be classified into diamagnetic substances, paramagnetic substances, ferromagnetic substances, antiferromagnetic substances and ferrimagnetic substances according to the strength with which they exhibit demagnetizing in an external magnetic field. Most materials are diamagnetic or paramagnetic and they react poorly to external magnetic fields. Ferromagnetic substances and ferrimagnetic substances are ferromagnetic substances.
The magnetic materials with high stability are mostly prepared by using rare earth materials, and in the preparation process of the rare earth materials, the rare earth materials are generally crushed by hydrogen crushing: the alloy powder with certain granularity is obtained by utilizing the along-crystal fracture and through-crystal fracture generated by the alloy in the hydrogen absorption and release processes to lead the alloy to be pulverized.
In the existing hydrogen shredding process, in order to increase effective contact between hydrogen and alloy, a furnace body of a hydrogen shredding furnace is usually required to be rotated, so that alloy particles in the furnace body roll along with the hydrogen to increase the contact area of the hydrogen and the alloy, but the effect of increasing the contact area of the hydrogen and the alloy is poor only through rotation of the hydrogen shredding furnace, and the efficiency of a hydrogen shredding method is low.
Disclosure of Invention
The application aims to solve the problem that hydrogen is insufficient to contact with magnetic fragments in the hydrogen crushing process of a high-stability magnetic material, and provides a magnetic material with high magnetic stability and a production process thereof compared with the prior art, and the method mainly comprises the following steps:
s1, smelting and purifying, namely sorting production raw materials of the magnetic material, removing impurities, and smelting and purifying to obtain a raw material blank conforming to the size;
s2, crushing the raw material into powder, putting the raw material blank into a hydrogen crushing furnace, performing hydrogen crushing to obtain magnetic fragments conforming to the size, and then performing fine grinding to obtain raw material powder conforming to the size;
s3, pressing and forming, namely putting raw material powder into a pressing die, and pressing and forming to obtain a magnetic material blank conforming to the size;
s4, sintering and tempering, namely sintering the magnetic material blank to obtain a molded magnetic material, and stabilizing the magnetism of the magnetic material after the magnetic material is subjected to the sintering and tempering;
s5, finish machining is carried out on the magnetic material prepared in the step S4 according to machining requirements, so that the size and the shape of the magnetic material meet manufacturing requirements;
the efficiency of the hydrogenation crushing method is improved, the hydrogenation crushing effect is improved, and the stability of the produced magnetic material is further improved.
Optionally, hydrogen garrulous stove includes hydrogen garrulous stove furnace body, put in a plurality of hydrogen garrulous balls in the hydrogen garrulous stove furnace body, a plurality of hydrogen garrulous balls all include the spherical shell, the spherical shell is including the main spherical shell of mutual adaptation and vice spherical shell, the one end that vice spherical shell is close to main spherical shell is excavated and is had the constant head tank, fixedly connected with magnetism ring on the groove bottom plate of constant head tank, the one end fixedly connected with that main spherical shell is close to vice spherical shell and constant head tank assorted holding ring, and magnetism ring and holding ring adsorb mutually, further utilize spherical shell cladding magnetism piece for be difficult for fill in between the magnetism piece completely, increase the area of contact of other hydrogen, increase the effect of hydrogen garrulous, simultaneously the magnetism piece is further cracked under hydrogen garrulous effect after, accord with the size needs and can pass the part of spherical shell and plastic net and spill in the hydrogen garrulous ball, realize the separation.
Optionally, the filler of the magnetic fragments in the spherical shell is two thirds of the internal volume of the spherical shell, so that the magnetic fragments in the spherical shell can roll freely along with the rolling of the hydrogen crushed balls, and the contact effect of the magnetic fragments and hydrogen is improved.
Optionally, the outside cover of spherical shell is equipped with the shaping net, and the shaping net has the trend of inwards contracting, further utilizes the shaping net to mould the spherical shell for the spherical shell is difficult for separating at the in-process of rolling.
Optionally, the shaping net is woven by a plurality of wear-resistant materials, so that the shaping net is not easy to break along with excessive wear of the elastic fiber during rolling, and the shaping net is not easy to separate from the outer side of the spherical shell.
Optionally, the outside fixedly connected with elastic fiber of shaping net, elastic fiber all become three-dimensional heliciform, and adjacent elastic fiber twines together, further makes hydrogen garrulous ball when rolling, can drag adjacent hydrogen garrulous ball to move together through elastic fiber's entanglement, increases its volume of turning, increases hydrogen garrulous effect.
Optionally, the elastic fiber comprises a fiber main body, the fiber main body is of a hollow structure, the flowing effect of hydrogen in the elastic fiber is further improved, and the phenomenon that local hydrogen cannot be contacted easily occurs.
Optionally, the fibre main part is last to be excavated has a plurality of through-holes, and a plurality of through-holes all run through fibre main part lateral wall, even further elastic fiber receives spherical shell and the extrusion deformation of moulding net, causes elastic fiber part to seal completely, also difficult the causing hydrogen can't flow in elastic fiber, is difficult for influencing hydrogen garrulous effect.
Optionally, the diameter of the through hole increases with the distance from the shaping net, and further when the elastic fiber is wrapped firmly and pulled, the fiber main body is easy to break at the through hole with large diameter, so that the whole length of the through hole is easy to keep, and the function of the through hole is easy to keep.
Optionally, the gasification temperature of the fiber body is lower than the sintering temperature in step S4, further facilitating the separation of the fiber body chips from the raw meal.
Compared with the prior art, the application has the advantages that:
according to the application, the spherical shell is used for coating the magnetic fragments, so that the magnetic fragments are not easy to fully fill, the contact area of the rest hydrogen is increased, the hydrogen crushing effect is increased, meanwhile, after the magnetic fragments are further crushed under the hydrogen crushing effect, the magnetic fragments can pass through the spherical shell and the part of the shaping net to leak out of the hydrogen crushed spheres according to the size requirement, separation is realized, meanwhile, when the hydrogen crushed spheres roll, adjacent hydrogen crushed spheres are dragged to move together through entanglement of elastic fibers, the turning quantity of the hydrogen crushed spheres is increased, the hydrogen crushing effect is increased, even if the elastic fibers are subjected to extrusion deformation of the spherical shell and the shaping net, the elastic fibers are not easy to cause that hydrogen cannot flow in the elastic fibers, the hydrogen crushing effect is not easy to influence, and when the elastic fibers are firmly entangled and are pulled, the fiber main body is easy to break at a through hole with a large diameter, the whole length of the through hole is easy to keep the function of the through hole.
The efficiency of the hydrogenation crushing method is increased, the hydrogenation crushing effect is improved, and the stability of the produced magnetic material is further improved.
Drawings
FIG. 1 is a main flow chart of a process for producing a magnetic material with high magnetic stability according to the present application;
FIG. 2 is a schematic view of the structure of the hydrogen crushing furnace body of the application;
FIG. 3 is a side cross-sectional view of the hydrogen crushing furnace body of the present application;
FIG. 4 is a schematic view of the hydrogen crushed ball structure of the application;
FIG. 5 is a front cross-sectional view of hydrogen crushed ball of the application;
FIG. 6 is a schematic diagram of the structure at A in FIG. 5;
FIG. 7 is a schematic view of the structure of the hydrogen crushing ball according to the present application after one time of operation;
FIG. 8 is an exploded view of the main structure of the hydrogen pellet of the present application;
FIG. 9 is a schematic structural view of an elastic fiber of the present application;
FIG. 10 is a schematic view of a partially sectioned structure of the elastic fiber of the present application after being straightened.
The reference numerals in the figures illustrate:
1 hydrogen crushing furnace body, 2 hydrogen crushing balls, 3 spherical shells, 301 main spherical shells, 302 auxiliary spherical shells, 303 magnetic rings, 304 positioning rings, 305 positioning grooves, 4 shaping nets, 5 elastic fibers, 501 fiber main bodies and 502 through holes.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present application are included in the protection scope of the present application.
Example 1:
the application discloses a production process of a magnetic material with high magnetic stability, referring to fig. 1, mainly comprising the following steps:
s1, smelting and purifying, namely sorting production raw materials of the magnetic material, removing impurities, and smelting and purifying to obtain a raw material blank conforming to the size;
s2, crushing the raw material into powder, putting the raw material blank into a hydrogen crushing furnace, performing hydrogen crushing to obtain magnetic fragments conforming to the size, and then performing fine grinding to obtain raw material powder conforming to the size;
s3, pressing and forming, namely putting raw material powder into a pressing die, and pressing and forming to obtain a magnetic material blank conforming to the size;
s4, sintering and tempering, namely sintering the magnetic material blank to obtain a molded magnetic material, and stabilizing the magnetism of the magnetic material after the magnetic material is subjected to the sintering and tempering;
s5, finish machining is carried out on the magnetic material obtained in the step S4 according to machining requirements, so that the size and the shape of the magnetic material meet manufacturing requirements.
In particular, in the present application, parameters such as selection and proportioning of raw materials and dimensions in each step in the production process of the magnetic material are all known techniques of those skilled in the art, and are not disclosed in detail in the present application, and those skilled in the art can reasonably set and design according to the prior art to meet production requirements.
The efficiency of the hydrogenation crushing method is increased, the hydrogenation crushing effect is improved, and the stability of the produced magnetic material is further improved.
Referring to fig. 2-10, the hydrogen crushing furnace comprises a hydrogen crushing furnace body 1, a plurality of hydrogen crushing balls 2 are put in the hydrogen crushing furnace body 1, the hydrogen crushing balls 2 comprise spherical shells 3, each spherical shell 3 comprises a main spherical shell 301 and an auxiliary spherical shell 302 which are matched with each other, a positioning groove 305 is cut at one end of the auxiliary spherical shell 302 close to the main spherical shell 301, a magnetic ring 303 is fixedly connected to a groove bottom plate of the positioning groove 305, a positioning ring 304 matched with the positioning groove 305 is fixedly connected to one end of the main spherical shell 301 close to the auxiliary spherical shell 302, the magnetic ring 303 is adsorbed with the positioning ring 304, the magnetic fragments are coated by the spherical shells 3, so that the magnetic fragments are not easy to be fully filled, the contact area of other hydrogen is increased, the hydrogen crushing effect is increased, and meanwhile, after the magnetic fragments are further crushed under the hydrogen crushing effect, the part that accords with the size needs can pass spherical shell 3 and shaping net 4 can leak in hydrogen garrulous ball 2, realize the separation, the packing of magnetic fragment in the spherical shell 3 is two-thirds of self internal volume, make the magnetic fragment in the spherical shell 3 can freely roll along with the roll of hydrogen garrulous ball 2, increase the contact effect of magnetic fragment and hydrogen, the outside cover of spherical shell 3 is equipped with shaping net 4, shaping net 4 has the trend of inwards shrink, utilize shaping net 4 to mould spherical shell 3, make spherical shell 3 be difficult for separating at the in-process of rolling, shaping net 4 selects a plurality of wear-resisting materials to weave and forms, make shaping net 4 be difficult for breaking along with elastic fiber 5 roll excessive wear, be difficult for causing shaping net 4 whole to break away from the outside of spherical shell 3.
The outside fixedly connected with elastic fiber 5 of shaping net 4, elastic fiber 5 all becomes three-dimensional heliciform, adjacent elastic fiber 5 twines together, make hydrogen garrulous ball 2 when rolling, can drag adjacent hydrogen garrulous ball 2 through the entanglement of elastic fiber 5 and move together, increase its volume of turning, increase hydrogen garrulous effect, elastic fiber 5 includes fiber main part 501, fiber main part 501 is hollow structure, increase the flow effect of hydrogen in elastic fiber 5, be difficult for appearing the phenomenon that the part can't contact hydrogen, the cutting has a plurality of through-holes 502 on fiber main part 501, a plurality of through-holes 502 all run through fiber main part 501 lateral wall, even elastic fiber 5 receives the extrusion deformation of spherical shell 3 and shaping net 4, cause elastic fiber 5 local totally seal, also be difficult for causing hydrogen unable to flow in elastic fiber 5, be difficult for influencing hydrogen garrulous effect, the diameter of through-hole 502 increases along with the distance increase with shaping net 4, when elastic fiber 5 is twined and is received and is pulled, fiber main part 501 is easy to break at the through-hole 502 that the diameter is big, easily keeps through-hole 502 integral length, easily, keep the function of running through-hole 501 is easy to keep the through-hole is less than the temperature of raw materials of sintered in the main part 501, the step of raw materials of the vaporization of the temperature of the fiber is easy to separate in the step of the sintered main part 501.
According to the application, the spherical shell 3 is used for coating the magnetic fragments, so that the magnetic fragments are not easy to fully fill, the contact area of the rest hydrogen is increased, the hydrogen crushing effect is increased, meanwhile, after the magnetic fragments are further crushed under the hydrogen crushing effect, the parts which can pass through the spherical shell 3 and the shaping net 4 according to the size requirement can leak out of the hydrogen crushed balls 2, separation is realized, meanwhile, when the hydrogen crushed balls 2 roll, adjacent hydrogen crushed balls 2 are dragged together through entanglement of the elastic fibers 5, the turning quantity of the hydrogen crushed balls is increased, the hydrogen crushing effect is increased, even if the elastic fibers 5 are subjected to extrusion deformation of the spherical shell 3 and the shaping net 4, the elastic fibers 5 are not easy to cause partial complete sealing, the hydrogen cannot flow in the elastic fibers 5, the hydrogen crushing effect is not easy to influence, when the elastic fibers 5 are firmly entangled and are pulled, the fiber main body 501 is easy to break at the through holes 502 with large diameter, the whole length of the through holes 502 is easy to keep the function of the through holes 502.
The efficiency of the hydrogenation crushing method is increased, the hydrogenation crushing effect is improved, and the stability of the produced magnetic material is further improved.
The present application is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present application and the improved concept thereof, can be equivalently replaced or changed within the scope of the present application.
Claims (8)
1. The production process of the magnetic material with high magnetic stability is characterized by mainly comprising the following steps of:
s1, smelting and purifying, namely sorting production raw materials of the magnetic material, removing impurities, and smelting and purifying to obtain a raw material blank conforming to the size;
s2, crushing the raw material into powder, putting the raw material blank into a hydrogen crushing furnace, performing hydrogen crushing to obtain magnetic fragments conforming to the size, and then performing fine grinding to obtain raw material powder conforming to the size;
s3, pressing and forming, namely putting raw material powder into a pressing die, and pressing and forming to obtain a magnetic material blank conforming to the size;
s4, sintering and tempering, namely sintering the magnetic material blank to obtain a molded magnetic material, and stabilizing the magnetism of the magnetic material after a moment;
s5, finish machining is carried out on the magnetic material prepared in the step S4 according to machining requirements, so that the size and the shape of the magnetic material meet manufacturing requirements;
the hydrogen crushing furnace comprises a hydrogen crushing furnace body (1), a plurality of hydrogen crushing balls (2) are put in the hydrogen crushing furnace body (1), the hydrogen crushing balls (2) comprise spherical shells (3), each spherical shell (3) comprises a main spherical shell (301) and an auxiliary spherical shell (302) which are matched with each other, a positioning groove (305) is cut at one end, close to the main spherical shell (301), of each auxiliary spherical shell (302), a magnetic ring (303) is fixedly connected to a groove bottom plate of each positioning groove (305), a positioning ring (304) matched with each positioning groove (305) is fixedly connected to one end, close to the auxiliary spherical shell (302), of each main spherical shell (301), and the magnetic rings (303) and the positioning rings (304) are adsorbed, wherein raw material blanks are positioned in the hydrogen crushing balls (2);
the filling material of the magnetic fragments in the spherical shell (3) is two thirds of the internal volume of the spherical shell.
2. The production process of the magnetic material with high magnetic stability according to claim 1, wherein the outer side of the spherical shell (3) is sleeved with a shaping net (4), and the shaping net (4) has a tendency to shrink inwards.
3. The production process of the magnetic material with high magnetic stability according to claim 2, wherein the shaping net (4) is woven by a plurality of wear-resistant materials.
4. The production process of the magnetic material with high magnetic stability according to claim 2, wherein elastic fibers (5) are fixedly connected to the outer side of the shaping net (4), the elastic fibers (5) are all in a three-dimensional spiral shape, and adjacent elastic fibers (5) are wound together.
5. A process for the production of a magnetic material with high magnetic stability according to claim 4, characterized in that said elastic fiber (5) comprises a fiber body (501), said fiber body (501) being of hollow structure.
6. The process for producing a magnetic material having high magnetic stability according to claim 5, wherein a plurality of through holes (502) are bored in the fiber main body (501), and a plurality of the through holes (502) penetrate through the side wall of the fiber main body (501).
7. A process for the production of a magnetic material with high magnetic stability according to claim 6, characterized in that the diameter of the through-going holes (502) increases with increasing distance from the shaping net (4).
8. A process for producing a magnetic material having high magnetic stability according to claim 5, characterized in that the gasification temperature of the fiber body (501) is originally lower than the sintering temperature in step S4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211067170.2A CN115376810B (en) | 2022-09-01 | 2022-09-01 | Magnetic material with high magnetic stability and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211067170.2A CN115376810B (en) | 2022-09-01 | 2022-09-01 | Magnetic material with high magnetic stability and production process thereof |
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| CN115376810A CN115376810A (en) | 2022-11-22 |
| CN115376810B true CN115376810B (en) | 2023-11-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332264A (en) * | 2014-10-13 | 2015-02-04 | 宁波尼兰德磁业有限公司 | Method for enhancing properties of sintered neodymium-iron-boron magnets |
| CN105195735A (en) * | 2015-11-12 | 2015-12-30 | 苏州萨伯工业设计有限公司 | Method for preparing rare earth permanent magnetic material by adding liquid-phase cerium in waste magnetic steel |
| KR20160078735A (en) * | 2014-12-24 | 2016-07-05 | 주식회사 포스코 | Rotating grinding-type Hydrogen decrepitating machine |
| CN108766701A (en) * | 2018-04-26 | 2018-11-06 | 安徽省瀚海新材料股份有限公司 | A kind of neodymium iron boron gets rid of the disintegrating process of strap |
| CN111341514A (en) * | 2020-03-25 | 2020-06-26 | 余姚市宏伟磁材科技有限公司 | Low-cost neodymium iron boron magnet and preparation method thereof |
| CN111946908A (en) * | 2020-08-13 | 2020-11-17 | 成都鑫筑博建材有限公司 | Metal composite pipe for environmental protection construction and production method thereof |
-
2022
- 2022-09-01 CN CN202211067170.2A patent/CN115376810B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332264A (en) * | 2014-10-13 | 2015-02-04 | 宁波尼兰德磁业有限公司 | Method for enhancing properties of sintered neodymium-iron-boron magnets |
| KR20160078735A (en) * | 2014-12-24 | 2016-07-05 | 주식회사 포스코 | Rotating grinding-type Hydrogen decrepitating machine |
| CN105195735A (en) * | 2015-11-12 | 2015-12-30 | 苏州萨伯工业设计有限公司 | Method for preparing rare earth permanent magnetic material by adding liquid-phase cerium in waste magnetic steel |
| CN108766701A (en) * | 2018-04-26 | 2018-11-06 | 安徽省瀚海新材料股份有限公司 | A kind of neodymium iron boron gets rid of the disintegrating process of strap |
| CN111341514A (en) * | 2020-03-25 | 2020-06-26 | 余姚市宏伟磁材科技有限公司 | Low-cost neodymium iron boron magnet and preparation method thereof |
| CN111946908A (en) * | 2020-08-13 | 2020-11-17 | 成都鑫筑博建材有限公司 | Metal composite pipe for environmental protection construction and production method thereof |
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| CN115376810A (en) | 2022-11-22 |
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