CN1048766A - The prescription of iron-base rare-earth permanent-magnet alloy and manufacture method thereof - Google Patents
The prescription of iron-base rare-earth permanent-magnet alloy and manufacture method thereof Download PDFInfo
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- CN1048766A CN1048766A CN 89105129 CN89105129A CN1048766A CN 1048766 A CN1048766 A CN 1048766A CN 89105129 CN89105129 CN 89105129 CN 89105129 A CN89105129 A CN 89105129A CN 1048766 A CN1048766 A CN 1048766A
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- iron
- magnet alloy
- earth permanent
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Abstract
The present invention relates to a kind of prescription of iron-base rare-earth permanent-magnet alloy, and manufacture method.The present invention utilizes inexpensive rich Nd mishmetal MR as the raw material of making iron-base rare-earth permanent-magnet alloy, is to improve permanent magnet performance and improve an amount of some elements that add of stability, and it is low to have a cost, process stabilizing, and the temperature stabilization performance is good, the characteristics that coercive force is big.
Description
The present invention relates to a kind of iron-base rare-earth permanent-magnet alloy and manufacture method thereof.
General iron-base rare-earth permanent-magnet alloy is to be magnet with Nd-Fe-B.This alloy exists that Curie temperature is low, temperature stability is poor, the low and high shortcoming of manufacturing cost of coercive force.For having added some precious metals, the coercive force that improves alloy cause cost significantly to improve.
The objective of the invention is provides a kind of technology simple to people, and cost is low, and the temperature stabilization performance is good, the iron-base rare-earth permanent-magnet alloy that coercive force is big.
The objective of the invention is to realize with following technical scheme: it is 60～95% raw materials as making iron-base rare-earth permanent-magnet alloy MR-Fe-B that this alloy adopts inexpensive rich its Nd content of Nd mishmetal MR(.Its component is: rich Nd mishmetal MR:28～40Wt%, Fe60～70Wt%, B:0.5～2.0Wt%.
Use the magnesia crucible in vaccum sensitive stove, alloy composition DY is pressed in melting under argon shield
2O
3Except rare earth alloy, melted alloy solution cast in casts the column crystal ingot in the copper film, with disintegrating machine coarse crushing 100～200 μ m; make 2～8 μ m through vibratory milling again; powder is also made the protection medium with alcohol, gasoline, toluene, perpendicular to magnetic direction, and magnetic field 〉=10KO
, pressure 2T/cm
2Condition under make blank, wait static pressure in order to improve density, pressure is 6T/cm
2Deng blank alloy sintering behind the static pressure under argon shield; in the vacuum diffusion furnace, carry out; in 1000～1200 ℃ of sintering 0.5～5 hour; through 800～1000 ℃ of aging of middle temperature 0.5～5 hour; after 0.5～5 hour, its type of cooling can be taked with the stove cooling at 450～750 ℃ of low temperature agings, and air-cooled and stove cools off outward.
As add DY
2O
3The alloy of composition is done protective medium with toluene with the alloy pig of MR, Fe, B in the particle that breaking disc is worn into 100～200 μ m is packed stainless cylinder of steel into, add 0.2～7(Wt) %DY simultaneously
2O
Ball milling becomes the particle of 2～8 μ m, compression moulding under above-mentioned condition after vacuum is drained.(with not adding DY
2O
3The alloy forming method identical).Its performance (BH) max=20～38MGOe.Br=9.0～12.5KGs IHC=7.0～220KOe
Add at least a Ce, V, W, TI, Nb, Co, NI, AL, MO, SI in the following element in rich Nd, Fe, B alloy, its content is at 0.1～20Wt%.
Specific embodiment is as follows:
Claims (4)
1, a kind of iron-base rare-earth permanent-magnet alloy is characterized in that: its component is: rich Nd mishmetal MR:28～40Wt%, Fe:60～70Wt%, B:0.5～2.0Wt%.
2, iron-base rare-earth permanent-magnet alloy as claimed in claim 1 is characterized in that: add at least a in the following element: Ce, V, W, Ti, Nb, Co, Ni, Al, its content of Mo, Si are at 0.1～20Wt%.
3, iron-base rare-earth permanent-magnet alloy as claimed in claim 1 is characterized in that: add rare earth oxide DY
2O
3, its content is 0.2～7Wt%.
4, the manufacture method of iron-base permanent magnet alloy as claimed in claim 1, it is characterized in that: MR, Fe, B are made the alloy pig mill, and to become granularity be the powder of 2～8 μ m, at the vertical magnetic field medium-pressure type, to base at 1000～1200 ℃ of sintering, 0.5～5 hours, through 800～1000 ℃ of aging of middle temperature 0.5～5 hour, at 450～750 ℃ of low temperature agings after 0.5～5 hour, cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105129 CN1048766A (en) | 1989-07-14 | 1989-07-14 | The prescription of iron-base rare-earth permanent-magnet alloy and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105129 CN1048766A (en) | 1989-07-14 | 1989-07-14 | The prescription of iron-base rare-earth permanent-magnet alloy and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1048766A true CN1048766A (en) | 1991-01-23 |
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ID=4855898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105129 Pending CN1048766A (en) | 1989-07-14 | 1989-07-14 | The prescription of iron-base rare-earth permanent-magnet alloy and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1048766A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408233C (en) * | 2006-08-23 | 2008-08-06 | 北京科技大学 | Magnetic field jel injection molding forming method for large scale rare earth aeolotropic binding magnet |
| CN1700374B (en) * | 2005-05-11 | 2010-04-28 | 华南理工大学 | In-situ polymerization method for preparing rare earth permanent magnetic alloy polymer composite magnetic body |
| CN101447268B (en) * | 2007-11-26 | 2012-08-22 | 比亚迪股份有限公司 | Neodymium iron boron permanent magnetic material and preparation method thereof |
-
1989
- 1989-07-14 CN CN 89105129 patent/CN1048766A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700374B (en) * | 2005-05-11 | 2010-04-28 | 华南理工大学 | In-situ polymerization method for preparing rare earth permanent magnetic alloy polymer composite magnetic body |
| CN100408233C (en) * | 2006-08-23 | 2008-08-06 | 北京科技大学 | Magnetic field jel injection molding forming method for large scale rare earth aeolotropic binding magnet |
| CN101447268B (en) * | 2007-11-26 | 2012-08-22 | 比亚迪股份有限公司 | Neodymium iron boron permanent magnetic material and preparation method thereof |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |