CN1067134A - Heat-resisting R-iron-boron system permanent magnetic material and manufacture method thereof - Google Patents
Heat-resisting R-iron-boron system permanent magnetic material and manufacture method thereof Download PDFInfo
- Publication number
- CN1067134A CN1067134A CN 92106147 CN92106147A CN1067134A CN 1067134 A CN1067134 A CN 1067134A CN 92106147 CN92106147 CN 92106147 CN 92106147 A CN92106147 A CN 92106147A CN 1067134 A CN1067134 A CN 1067134A
- Authority
- CN
- China
- Prior art keywords
- permanent magnetic
- magnetic material
- heat
- unavoidable impurities
- surplus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000696 magnetic material Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229910052796 boron Inorganic materials 0.000 title claims description 13
- 239000000956 alloy Substances 0.000 claims abstract description 25
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 22
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 230000032683 aging Effects 0.000 claims abstract description 10
- 230000002427 irreversible effect Effects 0.000 claims abstract description 8
- 230000005389 magnetism Effects 0.000 claims abstract description 8
- 230000002441 reversible effect Effects 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 49
- 239000000203 mixture Substances 0.000 claims description 27
- 229910052742 iron Inorganic materials 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 17
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 11
- 230000001590 oxidative effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 229910003321 CoFe Inorganic materials 0.000 claims 1
- 238000005275 alloying Methods 0.000 abstract description 3
- 238000009704 powder extrusion Methods 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229910052692 Dysprosium Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 229910052772 Samarium Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 241001278428 Trifolium glomeratum Species 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- -1 as Co Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Landscapes
- Hard Magnetic Materials (AREA)
Abstract
Heat-resistant R-Fe-D series permanent magnetic material and manufacture method thereof comprise the alloy powder extrusion forming that contains alloying element Co, Mo, Al and oxide are handled, and carry out sintering, the processing of middle temperature and low temperature aging again and handle.This permanent magnetic material when coercive force be that 21.5KOe, remanent magnetism are 10.8KGs, when magnetic energy product is 28.5MGe, can reach its reversible temperature coefficient α
20 ℃～200 ℃For-0.078%/℃, irreversible loss Wi
R200 ℃It only is 6.0% technical indicator.
Description
The present invention relates to the R-Fe-B series permanent magnetic material, R reaches the method for making this product for being the rare earth element that contains Nd at least in its composition.
In recent years, compare with Sm-Co series magnet before magnetic property more superior and also basis material in do not contain high price Sm or Co the R-Fe-B series permanent magnetic material helped people such as river true man and found, referring to CN85101455A.Comprise as its manufacture method the R-Fe-B alloy powder carried out forming processes that carry out sintering again, carrying out afterwards with heat treatment-cooling-heat treatment is two sections heat treatments of operation.The product magnetic energy product that obtains of method is higher than 30MGOe in view of the above.But, but be not implemented in the magnetic property aspect according to above-mentioned manufacture method and have the product that fully satisfies coercive force (iHc).
For this reason, corresponding improved R-Fe-B series permanent magnetic material such as bush clover thousand are quick at the clear 60-276570(publication number of spy: " R-B-Fe based sintered magnet and the manufacture method thereof " put down in writing in the patent application prospectus clear 62-134907), its difference is to contain 0.05～5.5wt%(percentage by weight in the composition) the R oxide, thereby obtain the product that coercive force significantly improves.
However, above-mentioned R-Fe-B series permanent magnetic material and manufacture method thereof, the deficiency of unresolved poor heat stability still aspect magnetic property, general serviceability temperature is the highest about 100 ℃, thereby under some hot environment (such as more than 150 ℃) condition, the application of this material just is restricted.
The object of the present invention is to provide a kind ofly not only to have higher coercive force characteristic, but also have the heat-resisting F-Fe-B series permanent magnetic material of good heat-resistant quality, and make the method for this product.
Fully study through the present inventor and to have reached above-mentioned purpose, and find for the R-Fe-B that with iron is basis material to be to add some specific alloy elements in the alloy, as Co, Mo, Al or other similar element of characteristic with it, and in a certain composition scope its magnetism of material can aspect greatly improved.Especially under hot conditions,, still has good magnetic performance as 150 ℃ or 200 ℃.Above-mentioned R-Fe-B is in the alloy, and " R " represents rare earth element usually, and it can be a kind of rare earth element, also can be more than one rare earth element.
More clearly say, be the heat-resistant R-Fe-D series permanent magnetism condensation material of realizing that the object of the invention provides, the fundamental component proportioning that it is characterized in that alloy composition is: R is that 14～18at%(at% is an atomic percent, as follows), B is 6.5～9.5at%, and Co is 0.5～5at%, and Mo is 0.1～3at%, Al is 0.5～4at%, and surplus is Fe and unavoidable impurities.In the said ratio, R is at least a kind of rare earth element, and Nd content is weight percentage at 90wt%(wt% at least among the R, and is as follows).
If explain that further when R was a kind of rare earth element, R just represented Nd; When R was more than one rare earth element, the R representative contained the Nd of 90wt% and the mixture of other one or more rare earth elements at least.Certainly, among the R except that Nd other one or more rare earth element, its content mostly is 10wt% most.And described other rare earth element refers to: Pr, La, Ce, Tb, Dy, Ho, Er, Eu, Sm, Gd, Pm, Tm, Yb and Lu.Hereinafter, R all represents above-mentioned implication.
Above-mentioned alloy material has been broken permanent magnet in the past can only adapt to precedent in the low temperature field, can be in the high temperature field, and as still having a superperformance more than 150 ℃ or under 200 ℃ even the higher condition.Its magnetic property is in particular in: coercive force (iHc) is at least 14KOe, magnetic energy product ((BH) m) is at least 30MGOe, remanent magnetism (Br) is at least 11.0KGs, and reversible temperature coefficient (20 ℃～200 ℃ of α) is at most-008% ℃, irreversible loss (Wi in the time of 200 ℃
r) be at most 21%.In above-mentioned alloy material, if its composition is further optimized qualification, the then stable more and improvement of the magnetic property of its material.That is: described permanent magnetic material is the R that basis material contains 14～16at% with Fe, the B of 6.5～7.5at%, the Co of 0.5～5at%, the Mo of 0.1～3at%, the Al of 0.5～2.5at%, and unavoidable impurities.
The present invention further discovers through the present inventor by above-mentioned heat-resistant R-Fe-D series permanent magnetic material, if add some oxides in the composition of alloy composition, as Dy
2O
3Or other other similar oxide of characteristic therewith, can obtain further improved heat-resisting permanent magnetic material of thermal stability.
Specifically, heat-resistant R-Fe-D series permanent magnetic material provided by the present invention is pressed and is stated composition and form further accomplished: the R of 14～18at%, 6.5 the B of～9.5at%, 0.5 the Co of～5at%, 0.1 the Mo of～3at%, 0.5 the Al of～4at% is no more than the Dy of R, B, Co, Mo, Al and Fe weight sum 5wt%
2O
3Unless (do not contain Dy
2O
3), and surplus is Fe and unavoidable impurities.
Add Dy
2O
3, its alloy material performance outstanding behaviours reduces the irreversible loss under the high temperature significantly further improving coercive force.But, Dy
2O
3Content if surpass the boundary of 5wt% as mentioned above, then can influence magnetic energy product, the magnetic energy product parameter is obviously descended; Otherwise, if Dy
2O
3Content seldom even go to zero, then do not see Dy
2O
3Additive effect.Therefore, Dy in the aforesaid proportioning
2O
3Content should be chosen in the scope of 0.5～5wt%.Like this, can make the magnetic characteristic of this permanent magnetic material satisfy iHc 〉=18.0KOe, (BH) m 〉=28MGOe, Br 〉=10.8KGs, 20 ℃～200 ℃ of α≤|-008|%/℃, Wi
r200 ℃≤7%.
Add Dy
2O
3The magnetic characteristic more stable and improvement of back in order to make hot permanent magnetic material, its composition can further be optimized qualification by following proportioning, that is: with Fe the R that basis material contains 14～16at%, 6.5 the B of～7.5at%, 0.5 the Co of～5at%, 0.1～3at%Mo, the Al of 0.5～2.5at% accounts for the Dy of R, B, Co, Mo, Al, Fe total weight 0.5～3wt%
2O
3, and unavoidable impurities.
The present invention is by the heat-resistant R-Fe-D series permanent magnetic material that foregoing description provided, and its manufacture method follows these steps to accomplished:
With granular size be 2～5 μ m alloy powder magnetic field greater than the 10KOe condition under extrusion forming, its composition proportioning is the R of 14～18at%, 6.5 the B of～9.5at%, 0.5 the Co of～5at%, 0.1 the Mo of～3at%, 0.5 the Al of～4at% accounts for the Dy of R, B, Co, Mo, Al, Fe total weight 0～5wt%
2O
3, surplus is Fe and unavoidable impurities;
Blank temperature after moulding sintering 0.5～4 hour under 1000～1200 ℃ non-oxidizing atmosphere condition, cooling fast afterwards;
Temperature during the object of sintering is under 700～1050 ℃, non-oxidizing atmosphere condition was handled 0.5～4 hour, cooled off fast afterwards;
Cooled object again under 450～800 ℃, non-oxidizing atmosphere condition low temperature aging handled 0.5～4 hour, cool off fast afterwards.
The present invention is by the method that above-mentioned steps provided, and its alloy powder is R, B, Co, Mo, Al, Fe and the Dy of 2～5 μ m with granular size by above-mentioned composition proportioning
2O
3Unless (do not contain Dy
2O
3) powder evenly mixes and get.Its alloy powder also can obtain by following description, be about to R, B, Co, Mo, Al and Fe raw material and in non-oxidizing atmosphere, carry out melting by made material mixture ratio, the alloy solution that has refined casts in the water-cooled copper film, the coarse crushing of formed column crystal ingot becomes 100～200 μ m powder, and vibratory milling or rolling ball milling are made 2～5 μ m powder again.If add Dy in institute's prepared material
2O
3, the interpolation scope accounts for 0.5～5wt% of R, B, Co, Mo, Al, Fe total weight, and presses the Dy of desired content
2O
3Make the protection medium with the volatile organic solution of gasoline or toluene, evenly sneak in above-mentioned mechanical milling process.Carry out forming processes after the alloy powder vacuumize of gained.In order to make permanent magnetic material obtain the anisotropy product, its forming processes is earlier that alloy powder is just molded earlier in greater than 10KOe magnetic field, and its pressure is 1.5～3t/cm
2, then in order to improve its density at 5～9t/cm
2Wait static pressure to handle under the pressure again.First when molded added magnetic field help increasing the particle orientation degree, help improving the magnetic characteristic of the Br of product.Above-mentioned alloy powder proportioning components is consistent with institute prepared material composition proportioning, thereby the optimization qualifications of pressing material mixture ratio also can adopt consistent optimal conditions to limit proportion of raw materials when the alloyage powder.
Blank after the forming processes is in order to make powder aggregates body alloying, and reaches the required phase structure of product optimum performance, with blank sintering 0.5～4 hour in the non-oxidizing atmosphere of 1000～1200 ℃ of temperature.Said non-oxidizing atmosphere is vacuum or inert gas conditions, and inert gas can adopt argon gas.In order to prevent to be unfavorable for separating out mutually of product magnetic characteristic, cooling fast immediately after the sintering, cool to room temperature.
After the cooling of the object of sintering, in order to eliminate the step that occurs on the demagnetization curve, to temperature processing during the object of sintering is under 700～1050 ℃, non-oxidizing atmosphere condition 0.5～4 hour.After middle temperature is handled, cool off cool to room temperature in order to prevent that its principal phase from separating out fast.
For make the rich R of crystal boundary mutually more evenly, remove structural defective, and further improve coercive force and thermal stability, through in the object of temperature after handling cool off back low temperature aging processing 0.5～4 hour under 450～800 ℃ of nonoxidizing atmosphere conditions.Carry out quick cooling processing, cool to room temperature behind the low temperature aging immediately.
As stated above, handle in sintering, middle temperature, when low temperature aging is handled, trend towards getting high value as if temperature in the condition and range that is added, then the time trends towards getting weak point; If temperature trends towards getting low value, then the time trends towards getting length.And when sintering, the processing of middle temperature and low temperature aging, its charging temperature and programming rate are not particularly limited, but must carry out quick cooling processing immediately when each phase process constant temperature finishes.Its cooling can be handled on cold water iron plate, is about to be placed on immediately after object takes out the atmosphere iron plate of water flowing cooling and goes up fast and cool off in high temperature furnace, and its cooling time is at 5～15 minutes, cool to room temperature, that is site environment temperature.Said cold water iron plate is according to structure shown in Figure 1, is provided with water inlet pipe (2) and outlet pipe (3) on iron case (1), needs the object (4) of cooling to be placed on its iron plate.
The present invention is by above-mentioned heat-resistant R-Fe-D series permanent magnetic material and the manufacture method thereof that provides, its permanent magnetic material product has higher coercive force, and can under 200 ℃ of high temperature, use and still have good magnetic characteristic, specifically when coercive force be 21.5KOe, remanent magnetism be 10.8KGs, when magnetic energy product is 28.5MGe, 20 ℃～200 ℃ of its reversible temperature coefficient α only are-0078%/℃, irreversible loss Wi
r200 ℃ only is 6.0%; Also can reach when coercive force be 15.9KOe, remanent magnetism be 11.5KGs, when magnetic energy product is 32.5MGe, 20 ℃～200 ℃ of its reversible temperature coefficient α only are 0.077%/℃, irreversible loss Wi
r200 ℃ only is 18%.The manufacture method that is provided has simple and easy to do, reliable and stable characteristics, thereby easily applies industrial.
Below embodiment provided by the present invention is described, but the present invention is not limited only to following embodiment.
Embodiment one:
Make the alloy powder that particle mean size is 3.7 μ m by (2) composition in the table 1, press (3) the composition Dy in the table 1
2O
3Make the protection homogeneous media with toluene and sneak in institute's constituent, its alloy powder particle mean size is 3.7 μ m.(2), (3) alloy powder is just molded in 12.0KOe magnetic field respectively, its initial pressure is 2t/cm
2, at 7t/cm
2Wait static pressure under the pressure again.Blank after the moulding was through 1100 ℃ * 2.5 hours sintering, and temperature is handled in 800 ℃ * 2 hours, 620 ℃ * 2 hours low temperature agings.Sintering, middle temperature handle and during low temperature aging its stove vacuum degree be 10
-2Charge into argon gas under the Pa condition, and each constant temperature all is placed on the cold water iron plate and is cooled fast to room temperature in stage immediately when finishing.(1) in the table 1 is a comparative example.As can be seen from Table 1, compare with pure R-Fe-B permanent magnetic material, its coercive force (iHc) obviously improves when also containing Co, Mo, Al alloying element in the composition, 20 ℃～200 ℃ of its heat-resistant stability α and Wi
r200 ℃ are obviously reduced, and add Dy
2O
3The result, its coercive force characteristic is significantly improved, the irreversible loss under the high temperature significantly descends.
Table 1
| Sequence number | Alloy composition | iHc (KOe) | Br (KGs) | (BH)m (MGOe) | α 20℃～200℃(-%/℃) | Wir 200℃(%) | Remarks |
| 1 | Nd 14B 85Fe is surplus | 8.0 | 12.0 | 35 | 0.20 | 52 | Comparative example |
| 2 | Nd 14Co 4Al 2Mo 2B 8.5Fe is surplus | 14.5 | 11.3 | 32 | 0.078 | 20 | |
| 3 | Nd 14Co 4Al 2Mo 2B 8.5Fe is surplus+2.5wt%Dy 2O 3 | 21.2 | 10.7 | 28.2 | 0.080 | 7 | Embodiment |
Embodiment two:
(2), (3) composition in the table 2 are made permanent magnetic material respectively by embodiment one described method, and prepared product magnetic characteristic sees Table shown in 2.
Table 2
| Sequence number | Alloy composition | iHc (KOe) | Br (KGs) | (BH)m (MGOe) | α 20℃～200℃(-%/℃) | Wir 200℃(%) | Remarks |
| 1 | Nd 15B 8Fe is surplus | 9.0 | 12.0 | 35 | 0.195 | 53 | Comparative example |
| 2 | Nd 15Co 3Al 1.5Mo 2.5B 8Fe is surplus | 15.9 | 11.5 | 32.5 | 0.077 | 19.5 | |
| 3 | Nd 15Co 3Al 1.5Mo 2.5B 5Fe is surplus+2wt%Dy 2O 3 | 20.8 | 10.8 | 28.5 | 0.079 | 6.9 | Embodiment |
Embodiment three:
With (2), (3) in the table 3 routine composition make permanent magnetic material suddenly respectively according to embodiment one described side, embodiment (2), (3) are shown in Table 3 with the magnetic characteristic of comparative example (1).
Table 3
| Sequence number | Alloy composition | iHc (KOe) | Br (KGs) | (BH)m (MGOe) | α 20℃～200℃(-%/℃) | Wir 200℃(%) | Remarks |
| 1 | Nd 17B 7Fe is surplus | 9.2 | 11.9 | 34 | 0.192 | 54 | Comparative example |
| 2 | Nd 17Co 2.5Al 1.2Mo 1.5B 7Fe is surplus | 15.5 | 11.2 | 30.5 | 0.077 | 18 | |
| 3 | Nd 17Co 2.5Al 1.2Mo 1.5B 7Fe is surplus+1.5wt%Dy 2O 3 | 20.5 | 10.8 | 28.5 | 0.078 | 6.0 | Embodiment |
Embodiment four:
(2), (3) listed composition in the table 4 are made permanent magnetic material respectively according to embodiment one described method, and the permanent magnet of manufacturing (2), (3) are compared with ratio (1), and its magnetic characteristic is shown in Table 4.
Table 4
| Sequence number | Alloy composition | iHc (KOe) | Br (KGs) | (BH)m (MGOe) | α 20℃～200℃(-%/℃) | Wir 200℃(%) | Remarks |
| 1 | Nd 18B 6.5Fe is surplus | 8.5 | 11.6 | 33 | 0.20 | 53 | Comparative example |
| 2 | Nd 18Co 1.5Al 2.5Mo 0.2B 6.5Fe is surplus | 15.6 | 11.1 | 30 | 0.077 | 18 | |
| 3 | Nd 18Co 1.5Al 2.5Mo 0.2B 6.5Fe is surplus+3wt%Dy 2O 3 | 21.5 | 10.6 | 28 | 0.078 | 65 | Embodiment |
※ annotates: comprise inevitable trace impurity in each composition shown in table 1～table 4.
Claims (10)
1, a kind of heat-resistant R-Fe-D series permanent magnetic material, it is characterized in that the contained atomic percent of fundamental component is: (R is at least a kind of rare earth element to the R of 14～18at%, and among the R Nd content at least at 90wt%), 6.5 the B of～9.5at%, 0.5 the Mo of C0.1～3at% of～5at%, 0.5 the Al of～4at%, and surplus is CoFe and unavoidable impurities.
2, a kind of heat-resistant R-Fe-D series permanent magnetic material, it is characterized in that the contained atomic percent of fundamental component is: the R(R of 14～18at% is at least a kind of rare earth element, and among the R Nd content at least at 90wt%), 6.5 the B of～9.5at%, 0.5 the Co of～5at%, 0.1 the Mo of～3at%, the Al of 0.5～4at% is no more than the Dy of R, B, Co, Mo, Al and Fe weight sum 5wt%
2O
3Unless (do not contain Dy
2O
3), and surplus is Fe and unavoidable impurities.
3,, it is characterized in that with Fe being the R that basis material contains 14～16at%, the B of 6.5～7.5at%, the Mo of Co0.1～3at% of 0.5～5at%, the Al of 0.5～2.5at%, and unavoidable impurities according to the described permanent magnetic material of claim 1.
4, according to claim 1,3 described permanent magnetic materials, it is characterized in that coercive force is at least 14KOe, magnetic energy product is at least 30MGOe, and remanent magnetism is at least 11.0KGs, reversible temperature coefficient α
20 ℃～200 ℃Be at most-0.08%/℃, irreversible loss W
Ir200 ℃Be at most 21%.
5, according to the described permanent magnetic material of claim 2, it is characterized in that Dy
2O
3Content account for 0.5～5wt% of R, B, Co, Mo, Al, Fe weight sum.
6,, it is characterized in that with Fe being the R that basis material contains 14～16at%, the B of 6.5～7.5at% according to the described permanent magnetic material of claim 5,0.5 the Co of～5at%, 0.1 the Mo of～3at%, the Al of 0.5～2.5at% accounts for the Dy of R, B, Co, Mo, Al, Fe total weight 0.5～3wt%
2O
3, and unavoidable impurities.
7, according to claim 2,5,6 described permanent magnetic materials, it is characterized in that coercive force is at least 28MGOe, remanent magnetism is at least 10.8KGs, reversible temperature coefficient α
20 ℃～200 ℃Be at most-0.08%/℃, irreversible loss Wi
R200 ℃Be at most 7%.
8, a kind of manufacture method of heat-resistant R-Fe-D series permanent magnetic material is characterized in that comprising the following steps:
With granular size be 2～5 μ m alloy powder magnetic field greater than the 10KOe condition under extrusion forming, the contained proportioning of its alloy powder composition is that the R(R of 14～18at% is at least a kind of rare earth element, and among the R Nd content at least at 90wt%), 6.5 the B of～9.5at%, 0.5 the Co of～5at%, 0.1 the Mo of～3at%, the Al of 0.5～4at% accounts for the Dy of R, B, Co, Mo, Al, Fe total weight 0～5wt%
2O
3, surplus is Fe and unavoidable impurities;
Blank after moulding sintering 0.5～4 hour under 1000～1200 ℃, non-oxidizing atmosphere condition, cooling fast afterwards;
Temperature during the cooled object of sintering is under 700～1050 ℃, non-oxidizing atmosphere condition was handled 0.5～4 hour, cooled off fast afterwards;
Cooled object again under 450～800 ℃, non-oxidizing atmosphere condition low temperature aging handled 0.5～4 hour, cool off fast afterwards.
9, in accordance with the method for claim 8, it is characterized in that Dy
2O
3The interpolation scope be the 0.5～5wt% that accounts for R, B, Co, Mo, Al, Fe weight sum.
10, according to claim 8,9 described methods, it is characterized in that sintering, middle temperature are handled, each stage cooling processing of low temperature aging processing is to carry out on cold water iron plate, be 5～15 minutes cooling time, cool to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106147 CN1067134A (en) | 1992-04-22 | 1992-04-22 | Heat-resisting R-iron-boron system permanent magnetic material and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106147 CN1067134A (en) | 1992-04-22 | 1992-04-22 | Heat-resisting R-iron-boron system permanent magnetic material and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1067134A true CN1067134A (en) | 1992-12-16 |
Family
ID=4941841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106147 Pending CN1067134A (en) | 1992-04-22 | 1992-04-22 | Heat-resisting R-iron-boron system permanent magnetic material and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1067134A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066314A1 (en) | 2022-09-28 | 2024-04-04 | 福建省金龙稀土股份有限公司 | Neodymium-iron-boron rare earth permanent magnet, preparation method therefor and use thereof |
-
1992
- 1992-04-22 CN CN 92106147 patent/CN1067134A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066314A1 (en) | 2022-09-28 | 2024-04-04 | 福建省金龙稀土股份有限公司 | Neodymium-iron-boron rare earth permanent magnet, preparation method therefor and use thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1191553B1 (en) | Manufacturing method of an anisotropic magnet powder | |
| US4952239A (en) | Magnetically anisotropic bond magnet, magnetic powder for the magnet and manufacturing method of the powder | |
| EP0302947B1 (en) | Rare earth element-iron base permanent magnet and process for its production | |
| US5228930A (en) | Rare earth permanent magnet power, method for producing same and bonded magnet | |
| US4888068A (en) | Process for manufacturing permanent magnet | |
| US5565043A (en) | Rare earth cast alloy permanent magnets and methods of preparation | |
| EP4439594A1 (en) | Neodymium-iron-boron magnet as well as preparation method therefor and use thereof | |
| CN111446055A (en) | High-performance neodymium iron boron permanent magnet material and preparation method thereof | |
| CN1100228A (en) | Magnetically anisotropic spherical powder | |
| WO2023280259A1 (en) | Corrosion-resistant and high-performance neodymium-iron-boron sintered magnet, preparation method therefor, and use thereof | |
| CN112119475B (en) | Method for producing rare earth sintered permanent magnet | |
| JP2741508B2 (en) | Magnetic anisotropic sintered magnet and method of manufacturing the same | |
| JPH04245403A (en) | Rare earth-fe-co-b-based anisotropic magnet | |
| JPWO2004003245A1 (en) | Alloy for bond magnet, isotropic magnet powder, anisotropic magnet powder, production method thereof, and bond magnet | |
| CN1024968C (en) | Method for preparing rare earth-iron-boron permanent magnetic material | |
| EP0348038A2 (en) | Manufacturing method of a permanent magnet | |
| JPH0320046B2 (en) | ||
| JPH045740B2 (en) | ||
| CN1078731C (en) | High-performance rare-earth permanent magnet material and preparation method therefor | |
| JP2001085256A (en) | Method for producing rare earth-Fe-Co-B magnet | |
| CN1067134A (en) | Heat-resisting R-iron-boron system permanent magnetic material and manufacture method thereof | |
| JPS6077959A (en) | Permanent magnet material and its manufacture | |
| CN1038167C (en) | Magnetic material and mfg. method thereof | |
| JPH045737B2 (en) | ||
| JP2992808B2 (en) | permanent magnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| 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 |