CN105655076A - Multi-main-phase high-coercivity NdFeB permanent magnet material for driving motor and preparation method of multi-main-phase high-coercivity NdFeB permanent magnet material - Google Patents
Multi-main-phase high-coercivity NdFeB permanent magnet material for driving motor and preparation method of multi-main-phase high-coercivity NdFeB permanent magnet material Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0576—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together pressed, e.g. hot working
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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Abstract
The invention discloses a multi-main-phase high-coercivity NdFeB permanent magnet material for a driving motor and a preparation method of the multi-main-phase high-coercivity NdFeB permanent magnet material. The final ratio of composition by weight of the NdFeB permanent magnet material is as follows: 20%-32% of a Pr-Nd alloy, 0-10% of Dy, 0-10% of Tb, 0.95%-1.0% of B, 0-0.2% of Cu, 0-1% of Al, 1%-3% of Co, 0-1% of Nb, 0-0.1% of Zr, 0-0.3% of Ga and the balance of Fe and a small quantity of inevitable impurities in the material. The invention further provides a composition proportioning method and the preparation method of the high-coercivity NdFeB permanent magnet material. The NdFeB permanent magnet material has higher coercivity and magnetic energy product and can meet the requirement for performance of the driving motor; when the NdFeB permanent magnet material is prepared with the method, the use amount of heavy rare earth in magnets can be reduced, flexible adjustment of customer demand quantity can be realized, and raw materials and the production cost can be saved.
Description
Technical field
The invention belongs to field of magnetic material, particularly relate to drive-motor high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material and manufacture method thereof.
Background technology
Nd-Fe-Bo permanent magnet material be aerospace equipment, marine engineering equipment, energy-conservation with new-energy automobile, the critical material in the advanced field such as track traffic equipment and electrical circuitry equipment. It is difficult to be replaced by other permanent magnet materials in the following 10-15 of prediction, improves and regulate and control the weave construction of Nd-Fe-Bo permanent magnet material, it is to increase its magnetic property is still the direction that people constantly make great efforts. What Nd-Fe-Bo permanent magnet material Application Areas rate of growth was the fastest is prepare for motor. Drive-motor is as the core component of new-energy automobile so that the high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material for drive-motor has broad application prospects; Meanwhile, the raising of drive-motor performance forces the improved performance of high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, to meet drive-motor manufacturing enterprise to the requirement of magnet performance.
At present, the preparation of high-coercive force sintered Nd-Fe-B permanent magnetic material still needs to add a certain amount of heavy rare earth element, and the consumption reducing heavy rare earth element is significant for the cost reducing high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material. New technology of preparing (doping of grain boundary decision, super-fine magnetic powder, heavy rare earth compound and dual alloy) can realize the coercive force improving magnet when remanent magnetism does not reduce. But, in the large-scale production of Sintered NdFeB magnet, there is obvious drawback in these technologies of preparing.
Summary of the invention
It is an object of the invention to provide a kind of new-energy automobile drive-motor many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material and its preparation method.
The technical solution adopted for the present invention to solve the technical problems is: the weight composition and ratio of drive-motor many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material: praseodymium neodymium alloy 20 ~ 32%, dysprosium 0 ~ 10%, terbium 0 ~ 10%, boron 0.95 ~ 1.0%, copper 0 ~ 0.2%, aluminium 0 ~ 1%, cobalt 1 ~ 3%, niobium 0 ~ 1%, zirconium 0 ~ 0.1%, gallium 0 ~ 0.3%, surplus is impurity inevitable on a small quantity in iron and material.
The drive-motor of the present invention preparation method of many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, comprising:
(1) preparing burden melting: design high heavy rare earths content according to the weight percent content between the component of described (drive-motor many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material) and component and without two kinds of heavy rare earths content formulas or multiple formulations, the content of micronutrient boron in formula, copper, aluminium, cobalt, niobium, zirconium, gallium etc. is identical; Main-phase alloy formula according to two or more different heavy rare earths content is prepared burden respectively, is then formed the alloy liquid of melting respectively by vacuum melting, is cast to copper roller surface cool taking the speed of 2 ~ 4m/s and forms the rapid-hardening flake of mean thickness as 0.2 ~ 0.5mm;
(2) the mixed powder of powder process: step (1) gained rapid-hardening flake being carried out hydrogen fragmentation, makes the meal that mean particle size is 100 ~ 200 ��m, add antioxidant and carry out airflow milling powder, obtained mean particle size is the magnetic of 3 ~ 5 ��m; According to the above-mentioned drive-motor weight composition and ratio of many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, gained magnetic of two or more being filled a prescription carries out weighing mixing in proportion, and batch mixing total amount is 2 ~ 100kg, and mixing time is 4 ~ 10h, and ball material mass ratio is 1:2;
(3) shaping: being taken by step (2) gained mixing magnetic automatic ration in full-automatic molding press, orientation is pressed into base block, carry out Vacuum Package, isostatic pressed, stripping oil, then base block is transported in sintering oven glove box and peels inner membrance off, prepare sintering;
(4) sintering timeliness: being transported in vacuum sintering furnace by base block in sintering oven glove box and sinter, sintering process is be incubated 0.5h at 300 ~ 400 DEG C, be incubated 1 ~ 3h at 850 ~ 950 DEG C, sintering temperature is 1050 ~ 1100 DEG C, cooling after insulation 3 ~ 5h; Base block after sintering is carried out two grades of crash handlings, and inefficacy technique is: one-level invalid temperature 850 ~ 950 DEG C, insulation 3 ~ 5h, two grades of invalid temperatures 480 ~ 560 DEG C, insulation 3 ~ 5h.
Further, in step (2), gained magnetic of two or more being filled a prescription carries out weighing mixing in proportion, and batch mixing total amount is 4 ~ 50kg, and mixing time is 6 ~ 8h.
Further, in step (4), sintering temperature 1070 ~ 1085 DEG C, insulation 3.5 ~ 4.5h, one-level invalid temperature 890 ~ 910 DEG C, insulation 3.5 ~ 4.5h, two grades of invalid temperatures 490 ~ 530 DEG C, insulation 3.5 ~ 4.5h.
Base block is transported in sintering oven glove box by above-mentioned steps of the present invention (3) and peels inner membrance off, explanation to wherein " inner membrance ": mixing magnetic is after being pressed into base block, need with thin plastics, base block to be packed, and then pack base block Vacuum Package by vacuum seal, the thin plastics that inner membrance just refers to.
The present invention is relative to the advantage of prior art and useful effect:
1., by rational main-phase alloy composition designing technique, design the main-phase alloy of high heavy rare earths content; Simultaneously so that the main-phase alloy composition of high heavy rare earths content is close to (Nd1-x-y-zPrxDyyTbz)2Fe14B(0��x+y+z��1) principal phase content so that heavy rare earth element is stayed in main phase grain as much as possible, it is to increase the anisotropy field of magnet;
2. the total rare earth content without the main-phase alloy of heavy rare earths content designed is higher, when the total rare earth content of mixed powder being made to meet the composition requirement of preparation high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material after the mixed powder of two or more main-phase alloy;
3. adopt mentioned component design and technology of preparing can improve magnetic property and the temperature stability of drive-motor many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material;
4. the present invention is by regulating heavy rare earths content, it is possible to the distribution of heavy rare earths content in control magnet so that heavy rare earth element is gathered in main phase grain as much as possible, it is to increase the coercive force of magnet; Simultaneously, it is possible to prepare to short run many principal phases high-coercive force Nd-Fe-B permanent magnet of different magnetic property, reduce the output of improper product, reduce scrap rate and production cost;
5. drive-motor can soft readjustment by the demand of the magnetic property of many principal phases high-coercive force neodymium iron boron magnetic body product and client, cost-saving, meet the different demands of client, it is beneficial to very much the research and development in early stage of drive-motor many principal phases high-coercive force neodymium iron boron magnetic body product.
Embodiment
For further describing the present invention, below in conjunction with embodiment, drive-motor of the present invention many principal phases high-coercive force neodymium iron boron magnetic body and manufacture method thereof are further described.
Embodiment 1:
(1) batching melting: preparing burden respectively according to two kinds of formulas in table 1-1, wherein, dysprosium, boron, zirconium, niobium adopt the form of dysprosium iron, ferro-boron, ferrozirconium and ferrocolumbium to add respectively; Often kind of formulated 50kg/ stove, the raw material prepared is put into and cleans clean rapid hardening furnace smelting pot, vacuumize, preheating, applying argon gas, melting, then alloy is poured on copper roller that roller speed is 2m/s, makes the rapid-hardening flake that mean thickness is 0.3mm; Powered-down, comes out of the stove after rapid-hardening flake cools;
(2) the mixed powder of powder process: step (1) gained rapid-hardening flake being carried out hydrogen fragmentation, makes the meal that mean particle size is 150 ��m, add antioxidant and carry out airflow milling powder, obtained mean particle size is the magnetic of 3 ~ 5 ��m; Carry out weighing in vacuum glove box in loading stainless steel batch can in the ratio of 1:1 by the magnetic of gained composition one and composition two, the batch mixing total amount of the magnetic of two kinds of compositions is 5kg, then being loaded in mixer by batch can and mix, mixing time is 6h, and ball material mass ratio is 1:2;
(3) shaping: step (2) gained mixing magnetic automatic ration in full-automatic molding press is taken, it is that in the magnetic field of 2.0T, orientation is pressed into base block in magneticstrength, carry out Vacuum Package, isostatic pressed, stripping oil, then base block is transported in sintering oven glove box and peels inner membrance off, prepare sintering;
(4) timeliness is sintered: being transported in vacuum sintering furnace by base block in glove box and sinter, sintering process is be incubated 0.5h at 320 DEG C, is incubated 2h at 900 DEG C, and sintering temperature is 1065 DEG C, cooling after insulation 3.5h; Base block after sintering is carried out two grades of crash handlings, and inefficacy technique is: one-level invalid temperature 920 DEG C, insulation 2.5h, two grades of invalid temperatures 490 DEG C, insulation 3.5h.
The magnetic property of the drive-motor many principal phases high-coercive force Sintered NdFeB magnet produced by above operation is as shown in table 1-2:
The magnetic property of many principal phases high-coercive force Sintered NdFeB magnet in embodiment 1.
Embodiment 2:
In sintering aging sequence, sintering temperature is 1075 DEG C, and other preparation technology is with embodiment 1, and the magnetic property preparing the many principal phases high-coercive force Sintered NdFeB magnet is as shown in table 2-1:
The magnetic property of many principal phases high-coercive force Sintered NdFeB magnet in embodiment 2.
Embodiment 3:
(1) batching melting: preparing burden by the mixed composition of 1:1 according to composition one in embodiment 1 and composition 2 two kinds formula, wherein, dysprosium, boron, zirconium, niobium adopt the form of dysprosium iron, ferro-boron, ferrozirconium and ferrocolumbium to add respectively; Often kind of formulated 50kg/ stove, the raw material prepared is put into and cleans clean rapid hardening furnace smelting pot, vacuumize, preheating, applying argon gas, melting, then alloy is poured on copper roller that roller speed is 2m/s, makes the rapid-hardening flake that mean thickness is 0.3mm; Powered-down, comes out of the stove after rapid-hardening flake cools; Table 3-1 be composition one and composition two fill a prescription mixed each group part weight proportion:
(2) the mixed powder of powder process: step (1) gained rapid-hardening flake being carried out hydrogen fragmentation, makes the meal that mean particle size is 150 ��m, add antioxidant and carry out airflow milling powder, obtained mean particle size is the magnetic of 3 ~ 5 ��m, and postorder preparation technology is with embodiment 1.
The magnetic property preparing the single principal phase high-coercive force neodymium iron boron magnetic body is as shown in table 3-2:
The magnetic property of single principal phase high-coercive force Sintered NdFeB magnet in embodiment 3.
Embodiment 4:
In sintering aging sequence, sintering temperature is 1075 DEG C, and other preparation technology is with embodiment 3.
The magnetic property preparing the single principal phase high-coercive force Sintered NdFeB magnet is as shown in table 4-1:
The magnetic property of single principal phase high-coercive force Sintered NdFeB magnet in embodiment 4.
Embodiment 5:
In sintering aging sequence, sintering temperature is 1085 DEG C, and other preparation technology is with embodiment 3.
The magnetic property preparing the single principal phase high-coercive force Sintered NdFeB magnet is as shown in Table 5-1:
The magnetic property of single principal phase high-coercive force Sintered NdFeB magnet in embodiment 5.
By the test result in above-described embodiment it will be seen that rare earth permanent-magnetic material according to embodiments of the present invention and preparation method, it is possible to obtain many principal phases high-coercive force sintered Nd-Fe-B permanent magnetic material, meet the performance requriements of new-energy automobile drive-motor; Meanwhile, under composition of the same race and sintering process, the magnetic property of many principal phases high-coercive force sintered Nd-Fe-B permanent magnetic material prepared by many main-phase alloy powder mixing method is obviously better than high-coercive force sintered Nd-Fe-B permanent magnetic material prepared by single main-phase alloy method.
The Micro-Structure Analysis of the rare earth permanent-magnetic material that the present invention obtains shows to contain in main phase grain the heavy rare earth element of different content, there is many principal phases compound of main phase grain in magnet; Heavy rare earths content in particulate state Nd-rich phase is lower than the heavy rare earths content of the main-phase alloy of high heavy rare earths content.
Claims (4)
1. drive-motor many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, it is characterized in that being made up of following compositions in weight percentage: praseodymium neodymium alloy 20 ~ 32%, dysprosium 0 ~ 10%, terbium 0 ~ 10%, boron 0.95 ~ 1.0%, copper 0 ~ 0.2%, aluminium 0 ~ 1%, cobalt 1 ~ 3%, niobium 0 ~ 1%, zirconium 0 ~ 0.1%, gallium 0 ~ 0.3%, surplus is impurity inevitable on a small quantity in iron and material.
2. the drive-motor preparation method of high-coercive force Nd-Fe-B permanent magnet material as claimed in claim 1, it is characterised in that be prepared from through following step:
(1) preparing burden melting: the weight percent between component according to claim 1 and component designs high heavy rare earths content and two kinds of formulas adding without heavy rare earth element or multiple formulations, the content of micronutrient boron in formula, copper, aluminium, cobalt, niobium, zirconium, gallium etc. is identical; Main-phase alloy formula according to two or more different heavy rare earths content is prepared burden respectively, is then formed the alloy liquid of melting respectively by vacuum melting, is cast to copper roller surface cool taking the speed of 2 ~ 4m/s and forms the rapid-hardening flake of mean thickness as 0.2 ~ 0.5mm;
(2) the mixed powder of powder process: step (1) gained rapid-hardening flake being carried out hydrogen fragmentation, makes the meal that mean particle size is 100 ~ 200 ��m, add antioxidant and carry out airflow milling powder, obtained mean particle size is the magnetic of 3 ~ 5 ��m; Permanent magnet material formula according to claim 1, gained magnetic of two or more being filled a prescription carries out weighing mixing in proportion, and batch mixing total amount is 2 ~ 100kg, and mixing time is 4 ~ 10h, and ball material mass ratio is 1:2;
(3) shaping: being taken by step (2) gained mixing magnetic automatic ration in full-automatic molding press, orientation is pressed into base block, carry out Vacuum Package, isostatic pressed, stripping oil, then base block is transported in sintering oven glove box and peels inner membrance off, prepare sintering;
(4) sintering timeliness: being transported in vacuum sintering furnace by base block in sintering oven glove box and sinter, sintering process is be incubated 0.5h at 300 ~ 400 DEG C, be incubated 1 ~ 3h at 850 ~ 950 DEG C, sintering temperature is 1050 ~ 1100 DEG C, cooling after insulation 3 ~ 5h; Base block after sintering is carried out two grades of crash handlings, and inefficacy technique is: one-level invalid temperature 850 ~ 950 DEG C, insulation 3 ~ 5h, two grades of invalid temperatures 480 ~ 560 DEG C, insulation 3 ~ 5h.
3. the drive-motor according to claim 2 preparation method of many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, it is characterized in that: composition design requirements adopts two or more main-phase alloy, the total rare earth content of the main-phase alloy of high heavy rare earths content is close to (Nd1-x-y-zPrxDyyTbz)2Fe14B(0��x+y+z��1) total rare earth content of principal phase, the total rare earth content without the main-phase alloy of heavy rare earth element is higher.
4. the drive-motor according to claim 2 preparation method of many principal phases high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, it is characterized in that: in step (2), gained magnetic of two or more being filled a prescription carries out weighing mixing in proportion, and batch mixing total amount is 4 ~ 50kg, and mixing time is 6 ~ 8h.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106409459A (en) * | 2016-06-28 | 2017-02-15 | 烟台正海磁性材料股份有限公司 | High-resistance permanent magnet and preparation method thereof |
| CN106782978A (en) * | 2017-01-22 | 2017-05-31 | 江西森阳科技股份有限公司 | A kind of preparation method of high-coercive force sintered NdFeB rare-earth permanent magnet material |
| CN107475631A (en) * | 2017-05-24 | 2017-12-15 | 安徽省瀚海新材料股份有限公司 | A kind of sintered NdFeB pressed compact processing method |
| CN108447638A (en) * | 2018-01-19 | 2018-08-24 | 浙江鑫盛永磁科技有限公司 | A kind of New energy automobile motor ultra-high coercive force Nd-Fe-B permanent magnet and preparation method thereof |
| CN109727742A (en) * | 2019-01-23 | 2019-05-07 | 宁波合盛磁业有限公司 | A kind of low heavy rare earth NdFeB material and preparation method thereof |
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| WO2021031724A1 (en) * | 2019-08-16 | 2021-02-25 | 厦门钨业股份有限公司 | Neodymium iron boron permanent magnet material, and raw material composition thereof, preparaton method therefor and application thereof |
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| CN106409459A (en) * | 2016-06-28 | 2017-02-15 | 烟台正海磁性材料股份有限公司 | High-resistance permanent magnet and preparation method thereof |
| CN106782978A (en) * | 2017-01-22 | 2017-05-31 | 江西森阳科技股份有限公司 | A kind of preparation method of high-coercive force sintered NdFeB rare-earth permanent magnet material |
| CN106782978B (en) * | 2017-01-22 | 2018-10-16 | 江西森阳科技股份有限公司 | A kind of preparation method of high-coercive force sintered NdFeB rare-earth permanent magnet material |
| CN107475631A (en) * | 2017-05-24 | 2017-12-15 | 安徽省瀚海新材料股份有限公司 | A kind of sintered NdFeB pressed compact processing method |
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| WO2021031724A1 (en) * | 2019-08-16 | 2021-02-25 | 厦门钨业股份有限公司 | Neodymium iron boron permanent magnet material, and raw material composition thereof, preparaton method therefor and application thereof |
| WO2021042864A1 (en) * | 2019-09-03 | 2021-03-11 | 厦门钨业股份有限公司 | Rare earth permanent magnet material, raw material composition, preparation method, application, and motor |
| KR20210151941A (en) * | 2019-09-03 | 2021-12-14 | 시아멘 텅스텐 코., 엘티디. | Rare earth permanent magnet material, raw material composition, manufacturing method, application, motor |
| KR102534035B1 (en) * | 2019-09-03 | 2023-05-17 | 푸젠 창팅 골든 드래곤 레어-어스 컴퍼니 리미티드 | Rare earth permanent magnet material, raw material composition, manufacturing method, application, motor |
| WO2021063061A1 (en) * | 2019-09-30 | 2021-04-08 | 厦门钨业股份有限公司 | Neodymium-iron-boron magnetic material, preparation method therefor and application thereof |
| CN113223807A (en) * | 2021-05-31 | 2021-08-06 | 包头金山磁材有限公司 | Neodymium-iron-boron permanent magnet and preparation method and application thereof |
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