CN1043649A - Process for preparing nd-fe-b spherical non-crystalline microcrystalline powder - Google Patents
Process for preparing nd-fe-b spherical non-crystalline microcrystalline powder Download PDFInfo
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- CN1043649A CN1043649A CN 88108934 CN88108934A CN1043649A CN 1043649 A CN1043649 A CN 1043649A CN 88108934 CN88108934 CN 88108934 CN 88108934 A CN88108934 A CN 88108934A CN 1043649 A CN1043649 A CN 1043649A
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- foundry alloy
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Abstract
What the present invention relates to is process for preparing Nd-Fe-B spherical non-crystalline microcrystalline powder.
The invention belongs to the preparation of magnetic functional material.By compound atomization process, produce the spherical non-crystalline microcrystalline powder that binding Nd-Fe-B permanent magnetic material is used.Described material composition is (weight): Nd10～70%; B0.1～10%; Surplus Fe.With speed is that the nitrogen or the argon gas of 1.1～6 Mach numbers carries out impact grinding to alloy liquid stream, is that 300～16,000 rev/min rosette is handled again with rotating speed then, makes Nd-Fe-B spherical non-crystalline microcrystalline powder.Powder property reaches (BH) max=7.0～20MGOe, and has isotropism.
Description
The invention belongs to the preparation of magnetic functional material, especially the present invention relates to a kind of preparation method of novel Nd-Fe-B spherical non-crystalline microcrystalline powder.
Nd-Fe-B spherical non-crystalline microcrystalline powder is mainly used in the manufacturing binding electromagnetic material.The U.S. adopts Quench strip mechanical crushing method production sheet neodymium iron boron non-crystalline microcrystalline powder at present, produces binding Nd-Fe-B permanent magnetic material.Because powder shape is a laminated structure, when producing the magnetic moulding material, causes the grain shape segregation easily, particle segregation and volumetric efficiency are low, cause magnetic moulding material performance inhomogeneous (total magnetic energy product descends); Simultaneously, cause magnetic moulding material machinability poor, surface smoothness is low.
The purpose of this invention is to provide a kind of novel preparation technology, produce Nd-Fe-B spherical non-crystalline microcrystalline powder, improve the magnetic property and the surface smoothness of magnetic moulding material, improve processing characteristics.
Accompanying drawing 1 is compound atomizing spherical powder equipment schematic diagram.
Describe below in conjunction with 1 pair of process for preparing Nd-Fe-B spherical non-crystalline microcrystalline powder of accompanying drawing.
Technical scheme of the present invention is:
(1) fuse under vacuum or argon shield or the remelting foundry alloy with traditional method, the composition of this foundry alloy (weight) is controlled at: Nd15～70%; B0.1～10%; Surplus Fe preferably is controlled at Nd23～40%, B0.3～3.8%; Surplus Fe, the mother liquor temperature is in 1200～1500 ℃.
(2) with pressure 10～180kg/cm
2Nitrogen or argon gas, by air inlet pipe 1 enter the atomizing aggregator 2 in.
(3) can produce two strands of air-flows through atomizing aggregator 2, the one tunnel through auxiliary jet 3, causes the negative pressure at alloy liquid flow export place, prevents to regurgitate, and another road produces the supersonic speed impact air-flow after high speed jet pipe 4 quickens.
(4) in the atomizing aggregator a plurality of auxiliary tubes 3 and high speed jet pipe 4 are arranged, the Space Angle 6 of high speed jet pipe 4 should be controlled in 15～85 °.
(5) the supersonic flow flow velocity of high speed jet pipe 4 generations should be controlled in 1.1～6.0 Mach numbers, preferably is controlled in 1.2～5.5 Mach numbers.
(6) impact foundry alloy liquid a fluid stream 5 with high velocity air, produce the droplet of pulverizing 7.
(7) rotating speed of control metal garden dish 8 is 300～16, in 000 rev/min, preferably is controlled in 1,300～14,300 rev/mins, and droplet 7 is broken and cross cold back generation Nd-Fe-B spherical non-crystalline microcrystalline powder through garden dish 8.Obtain powder magnetic energy product (BH) max=7～20MGOe.
Nd-Fe-B spherical non-crystalline microcrystalline powder by manufacturing of the present invention is compared with sheet non-crystalline microcrystalline powder produced in USA, can save disintegrating apparatus, production efficiency height, improved the powder uniformity when manufacturing the magnetic moulding material, eliminate the grain shape segregation, particle segregation and magnetic moulding material inhomogeneities are improved the surface smoothness of magnetic moulding material machinability and part.
Embodiment:
Nd Fe B alloys composition: Nd25%, B0.5%, surplus Fe, (commercially available), and melt temperature: 1350 ℃, 150 kilograms/cm of argon pressure
2, 30 ° of atomizing aggregator high speed jet pipe space angles, air velocity 3.8 Mach numbers, 12,000 rev/mins of metal garden dish rotating speeds.Make spherical non-crystalline microcrystalline powder, its (BH) max=14.5MGOe.
Claims (4)
1, a kind of preparation method of Nd-Fe-B spherical non-crystalline microcrystalline powder comprises:
1. melting or remelting foundry alloy, its composition (weight), Nd23～40%; B0.3～3.8%; Surplus Fe.
2. atomize with high speed atomization gas liquid towards foundry alloy liquid stream.
3. the foundry alloy after the atomizing was pulverized cold treatment through metal garden dish again.
It is characterized in that:
--atomization pressure is 10～180Kgf/cm
2Nitrogen or argon gas, spray to liquid foundry alloy a fluid stream 5 through high speed jet pipe 4, this high velocity air flow velocity is controlled in 1.1～6.0 Mach numbers.
--foundry alloy after the atomizing carries out fragmentation and crosses cold treatment through metal garden dish 8 again, and its garden is coiled rotating speed and is controlled at 300～16, in 000 rev/min.
2, according to the method for claim 1, it is characterized in that:
Atomizing aggregator 2 produces the special air-flow of two-way, and one tunnel air-flow through auxiliary jet 3 prevents to regurgitate, and another road produces supersonic speed impact grinding air-flow through high speed jet pipe 4.High speed jet pipe Space Angle should be controlled at 18～85 °.
3, according to the method for claim 1, it is characterized in that:
Atomization pressure is 50～180kgf/cm
2Nitrogen or argon gas, spray to liquid foundry alloy a fluid stream 5 through high speed jet pipe 4, the high velocity air flow velocity is controlled at 1.2～5.5 Mach numbers.
4, according to the method for claim 1, it is characterized in that:
Foundry alloy after the atomizing carries out fragmentation and crosses cold treatment through metal garden dish again, and its garden is coiled rotating speed and is controlled at 1,300～14, in 300 rev/mins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108934 CN1014688B (en) | 1988-12-31 | 1988-12-31 | Process for preparing nd-fe-b spherical non-crystalline microcrystalline powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88108934 CN1014688B (en) | 1988-12-31 | 1988-12-31 | Process for preparing nd-fe-b spherical non-crystalline microcrystalline powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043649A true CN1043649A (en) | 1990-07-11 |
| CN1014688B CN1014688B (en) | 1991-11-13 |
Family
ID=4835258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88108934 Expired CN1014688B (en) | 1988-12-31 | 1988-12-31 | Process for preparing nd-fe-b spherical non-crystalline microcrystalline powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014688B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326648C (en) * | 2001-06-13 | 2007-07-18 | 赫加奈斯公司 | Method for preparation of high density soft magnetic products |
| WO2011082595A1 (en) * | 2010-01-05 | 2011-07-14 | 北京科技大学 | Method for preparing superfine spherical neodymium-iron-boron powder |
| CN103632834A (en) * | 2013-12-03 | 2014-03-12 | 江苏大学 | Preparation method of high-performance anisotropic Nd-Fe-B magnetic body |
| CN108188408A (en) * | 2018-01-04 | 2018-06-22 | 北京理工大学 | A kind of spherical atomization magnesium zinc non-crystaline amorphous metal powder and preparation method thereof |
| CN110125435A (en) * | 2019-05-16 | 2019-08-16 | 南京航空航天大学 | A kind of amorphous Fe boron alloy electromagnetic-wave absorbent and preparation method thereof |
| CN111435617A (en) * | 2019-01-15 | 2020-07-21 | 绵阳市恒信磁性材料有限公司 | Preparation method of rare earth permanent magnetic material |
| CN112658272A (en) * | 2020-12-16 | 2021-04-16 | 杭州电子科技大学 | High-cooling-gradient plasma arc-gas atomization composite powder making device and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011883B (en) * | 2017-03-30 | 2020-02-14 | 中国石油天然气股份有限公司 | Blocking remover for polymer-containing sewage injection well and preparation method and application thereof |
-
1988
- 1988-12-31 CN CN 88108934 patent/CN1014688B/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326648C (en) * | 2001-06-13 | 2007-07-18 | 赫加奈斯公司 | Method for preparation of high density soft magnetic products |
| WO2011082595A1 (en) * | 2010-01-05 | 2011-07-14 | 北京科技大学 | Method for preparing superfine spherical neodymium-iron-boron powder |
| CN103632834A (en) * | 2013-12-03 | 2014-03-12 | 江苏大学 | Preparation method of high-performance anisotropic Nd-Fe-B magnetic body |
| CN103632834B (en) * | 2013-12-03 | 2015-12-02 | 江苏大学 | A kind of preparation method of high-performance anisotropic Nd-Fe-B |
| CN108188408A (en) * | 2018-01-04 | 2018-06-22 | 北京理工大学 | A kind of spherical atomization magnesium zinc non-crystaline amorphous metal powder and preparation method thereof |
| CN108188408B (en) * | 2018-01-04 | 2021-04-02 | 北京理工大学 | Spherical atomized magnesium-zinc amorphous alloy powder and preparation method thereof |
| CN111435617A (en) * | 2019-01-15 | 2020-07-21 | 绵阳市恒信磁性材料有限公司 | Preparation method of rare earth permanent magnetic material |
| CN110125435A (en) * | 2019-05-16 | 2019-08-16 | 南京航空航天大学 | A kind of amorphous Fe boron alloy electromagnetic-wave absorbent and preparation method thereof |
| CN112658272A (en) * | 2020-12-16 | 2021-04-16 | 杭州电子科技大学 | High-cooling-gradient plasma arc-gas atomization composite powder making device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1014688B (en) | 1991-11-13 |
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