CN104464997A - High-coercivity NdFeB permanent-magnet material and preparation method thereof - Google Patents
High-coercivity NdFeB permanent-magnet material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 17
- 229910001172 neodymium magnet Inorganic materials 0.000 title abstract description 16
- 238000002360 preparation method Methods 0.000 title description 4
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010936 titanium Substances 0.000 claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims abstract description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 20
- 229910052739 hydrogen Inorganic materials 0.000 claims description 20
- 239000001257 hydrogen Substances 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 20
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 12
- 229910052796 boron Inorganic materials 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 229910052758 niobium Inorganic materials 0.000 claims description 12
- 238000003801 milling Methods 0.000 claims description 10
- 239000011812 mixed powder Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 9
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 7
- 229910052771 Terbium Inorganic materials 0.000 claims description 7
- 229910052733 gallium Inorganic materials 0.000 claims description 7
- 239000005543 nano-size silicon particle Substances 0.000 claims description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 7
- 101710088194 Dehydrogenase Proteins 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 5
- 239000006247 magnetic powder Substances 0.000 abstract description 2
- 239000002105 nanoparticle Substances 0.000 abstract 2
- 239000011858 nanopowder Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 241001036794 Microsorum maximum Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- H01F1/0573—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 obtained by reduction or by hydrogen decrepitation or embrittlement
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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
- 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
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a high-coercivity NdFeB permanent-magnet material. Alloy powder for producing the high-coercivity NdFeB permanent-magnet material comprises, by mass, 16-24% of Nd, 0.95-1.12% of B, 0.12-0.19% of Cu, 0.21-0.32% of Co, 0.05-0.13% of Ga, 0.28-0.40% of Nb, 2.1-3.1% of Pr, 0.12-0.25% of Tb and the balance Fe. The high-coercivity NdFeB permanent-magnet material is made from the alloy powder by being added with nano-palladium black, nano-sized titanium and nano-sized titanium nitride by sintering. The high-coercivity NdFeB permanent-magnet material has the advantages that the high-coercivity NdFeB permanent-magnet material is made from magnetic powder different in grain diameter by being added with multiple kinds of activated nanopowder by mixing uniformly through a special sintering process, and NdFeB magnets small in grain size, uniform in grain boundary phase distribution and complete in grain orientation are formed through the process, thereby being higher in coercivity; moreover, high magnetic energy product is guaranteed effectively, and balance between high coercivity and the high magnetic energy product is achieved.
Description
Technical field
The invention belongs to magnetic functional material field, be specifically related to a kind of high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material and preparation method thereof.
Background technology
Since the people such as nineteen eighty-three Sagawa find neodymium iron boron magnetic body, the magnetic property of its excellence creates highest record at that time, thus declared the birth of third generation rare-earth permanent magnet, theoretical magnetic energy product (BH) can reach 64MGOe (509kJ/m3), laboratory magnetic energy product (BH) has reached 59MGOe (469kJ/m3), and commercial scale can produce the magnet of magnetic energy product (BH) up to 52MGOe (413kJ/m3).But, because the temperature stability of sintered NdFeB magnet is poor, and the raising of stability needs the coercitive improvement of magnet, therefore exploitation has the main target that the sintered magnet of high energy product (BH) and high-coercive force (H i) is also NdFeB researcher.Along with the continuous expansion of application market, the research and development of sintered NdFeB and industrialization speed are very fast, this be other permanent magnetic material incomparable.In recent years to the requirement in miniaturization, lightweight and energy-conserving and environment-protective etc. of computer, Communication Equipment and automobile motor, also will inevitably be more and more higher to the requirement of magnet performance.A kind of low-cost sintered neodymium iron boron and preparation method thereof, application number: 201210068196.9.The rare metal dysprosium of the high cost that the rare metal holmium of this invention low cost substitutes, does not affect the magnetic property of Sintered NdFeB magnet simultaneously, thus reduces the production cost of product., its key technical indexes reaches following parameter: remanent magnetism (Br) 1.18 ~ 1.22 mT; Magnetic induction coercive force (bHc) >=860 kA/m; HCJ (jHc) >=1353 kA/m.Maximum magnetic energy product (BH) max 263 ~ 295 kJ/m3.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, there is provided a kind of high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, this high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, there is higher coercive force, and effectively ensure that its high magnetic energy product, acquisition high-coercive force is balanced with high energy product.
High-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material of the present invention; Alloy powder by following component and mass percent: Nd 16 ~ 24%, B 0.95 ~ 1.12%, Cu 0.12 ~ 0.19%, Co 0.21 ~ 0.32%, Ga 0.05 ~ 0.13%, Nb 0.28 ~ 0.40%, Pr 2.1 ~ 3.1%, Tb 0.12 ~ 0.25%, surplus are Fe; Interpolation nanometer palladium black, nano titanium powder, Nano titanium nitride powder sintering form.
As optimization, this high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, described nanometer palladium black average grain diameter is 10nm, nano titanium powder average grain diameter is 40nm, nano silicon nitride titanium valve average grain diameter is 60nm.
Prepare the method for this high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material, comprise the following steps:
(1) be Fe proportioning raw material according to mass percent Nd 23.6%, B 1.11%, Cu 0.19%, Co 0.32%, Ga 0.13%, Nb 0.39%, Pr 3.1%, Tb 0.25%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.15 ~ 0.25mm;
(2) by the thin slice in step (1), add hydrogen broken furnace, and within 6 hours, make the quick-fried powder of hydrogen 550 ~ 570 DEG C of dehydrogenations; Then after airflow milling, make the magnetic that particle mean size is 1 ~ 2 μm;
(3) be Fe proportioning raw material according to mass percent Nd 14.2%, B 0.96%, Cu 0.13%, Co 0.22%, Nb 0.30%, Pr 2.6%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.25 ~ 0.35mm;
(4) by the thin slice in step (4), add hydrogen broken furnace, and make the quick-fried powder of hydrogen at 580 ~ 590 DEG C of dehydrogenase 34s hour; Then after airflow milling, make the magnetic that particle mean size is 2.5 ~ 3.5 μm;
(5) magnetic in step (2) and step (4), nanometer palladium black, nano titanium powder, nano silicon nitride titanium valve are mixed for 850:150:4:9:18 joins in mixer in mass ratio, obtain mixed powder;
(6) by the mixed powder orientation in Magnetic field press in step (5), cold isostatic compaction, put into high vacuum sintering furnace 1030 ~ 1065 DEG C sintering 2 hours, after rapid cooling is air-cooled, vacuumize 1100 ~ 1140 DEG C of double sinterings 2 hours, take out through 815 ~ 855 DEG C of temper 3 h and obtain finished product.
The present invention is by the magnetic of different-grain diameter, add various active nanometer powder, mix and formed by special sintering technique sintering,, Grain-Boundary Phase tiny by this technique formation crystal grain is uniformly distributed the neodymium iron boron magnetic body complete with grain orientation, this neodymium iron boron magnetic body has higher coercive force, and effectively ensure that its high magnetic energy product, acquisition high-coercive force is balanced with high energy product.Measure the magnetic property of sample with NIM-10000 type magnetism testing instrument, result is as follows in table 1.
Embodiment
The invention will be further described for embodiment plan given below; but can not be interpreted as it is limiting the scope of the invention; those skilled in the art to nonessential improvement and adjustment more of the present invention, still belong to protection scope of the present invention according to content of the present invention.
Embodiment 1:(1) be Fe proportioning raw material according to mass percent Nd 23.6%, B 1.11%, Cu 0.19%, Co 0.32%, Ga 0.13%, Nb 0.39%, Pr 3.1%, Tb 0.25%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.15 ~ 0.25mm;
(2) by the thin slice in step (1), add hydrogen broken furnace, and within 6 hours, make the quick-fried powder of hydrogen 560 DEG C of dehydrogenations; Then after airflow milling, make the magnetic that particle mean size is 1 ~ 2 μm;
(3) be Fe proportioning raw material according to mass percent Nd 14.2%, B 0.96%, Cu 0.13%, Co 0.22%, Nb 0.30%, Pr 2.6%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.25 ~ 0.35mm;
(4) by the thin slice in step (4), add hydrogen broken furnace, and make the quick-fried powder of hydrogen at 585 DEG C of dehydrogenase 34s hour; Then after airflow milling, make the magnetic that particle mean size is 2.5 ~ 3.5 μm;
(5) get the magnetic 15 kilograms in the magnetic 85 kilograms of step (2), step (4), nanometer palladium black 0.4 kilogram, nano titanium powder 0.9 kilogram, nano silicon nitride titanium valve 1.8 kilograms join in mixer and mix, make nanometer powder uniform adsorption around NdFeB magnetic powder principal phase, obtain mixed powder;
(6) by the mixed powder orientation in Magnetic field press in step (5), cold isostatic compaction, puts into high vacuum sintering furnace 1050 DEG C sintering 2 hours, after rapid cooling is air-cooled, vacuumize 1120 DEG C of double sinterings 2 hours, take out through 845 DEG C of temper 3 h and obtain finished product.
Embodiment 2:(1) be Fe proportioning raw material according to mass percent Nd 23.8%, B 1.11%, Cu 0.19%, Co 0.31%, Ga 0.13%, Nb 0.39%, Pr 3.1%, Tb 0.25%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.15 ~ 0.25mm;
(2) by the thin slice in step (1), add hydrogen broken furnace, and within 6 hours, make the quick-fried powder of hydrogen 550 DEG C of dehydrogenations; Then after airflow milling, make the magnetic that particle mean size is 1 ~ 2 μm;
(3) be Fe proportioning raw material according to mass percent Nd 14.1%, B 0.96%, Cu 0.12%, Co 0.23%, Nb 0.29%, Pr 2.6%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.25 ~ 0.35mm;
(4) by the thin slice in step (4), add hydrogen broken furnace, and make the quick-fried powder of hydrogen at 580 DEG C of dehydrogenase 34s hour; Then after airflow milling, make the magnetic that particle mean size is 2.5 ~ 3.5 μm;
(5) get the magnetic 15 kilograms in the magnetic 85 kilograms of step (2), step (4), nanometer palladium black 0.4 kilogram, nano titanium powder 0.9 kilogram, nano silicon nitride titanium valve 1.8 kilograms join in mixer and mix, obtain mixed powder;
(6) by the mixed powder orientation in Magnetic field press in step (5), cold isostatic compaction, puts into high vacuum sintering furnace 1030 DEG C sintering 2 hours, after rapid cooling is air-cooled, vacuumize 1100 DEG C of double sinterings 2 hours, take out through 815 DEG C of temper 3 h and obtain finished product.
Embodiment 3:(1) be Fe proportioning raw material according to mass percent Nd 23.8%, B 1.05%, Cu 0.19%, Co 0.32%, Ga 0.13%, Nb 0.37%, Pr 3.1%, Tb 0.22%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.15 ~ 0.25mm;
(2) by the thin slice in step (1), add hydrogen broken furnace, and within 6 hours, make the quick-fried powder of hydrogen 570 DEG C of dehydrogenations; Then after airflow milling, make the magnetic that particle mean size is 1 ~ 2 μm;
(3) be Fe proportioning raw material according to mass percent Nd 14.0%, B 0.99%, Cu 0.13%, Co 0.22%, Nb 0.28%, Pr 2.7%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.25 ~ 0.35mm;
(4) by the thin slice in step (4), add hydrogen broken furnace, and make the quick-fried powder of hydrogen at 590 DEG C of dehydrogenase 34s hour; Then after airflow milling, make the magnetic that particle mean size is 2.5 ~ 3.5 μm;
(5) get the magnetic 15 kilograms in the magnetic 85 kilograms of step (2), step (4), nanometer palladium black 0.4 kilogram, nano titanium powder 0.9 kilogram, nano silicon nitride titanium valve 1.8 kilograms join in mixer and mix, obtain mixed powder;
(6) by the mixed powder orientation in Magnetic field press in step (5), cold isostatic compaction, puts into high vacuum sintering furnace 1065 DEG C sintering 2 hours, after rapid cooling is air-cooled, vacuumize 1140 DEG C of double sinterings 2 hours, take out through 855 DEG C of temper 3 h and obtain finished product.
Claims (3)
1. a high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material; It is characterized in that the alloy powder by following component and mass percent:
Nd 16 ~ 24%, B 0.95 ~ 1.12%, Cu 0.12 ~ 0.19%, Co 0.21 ~ 0.32%, Ga 0.05 ~ 0.13%, Nb 0.28 ~ 0.40%, Pr 2.1 ~ 3.1%, Tb 0.12 ~ 0.25%, surplus are Fe; Interpolation nanometer palladium black, nano titanium powder, Nano titanium nitride powder sintering form.
2. ask the high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material described in 1 according to right; It is characterized in that described nanometer palladium black average grain diameter be 10nm, nano titanium powder average grain diameter is 40nm, nano silicon nitride titanium valve average grain diameter is 60nm.
3. prepare a method for high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material described in claim 1 or 2, it is characterized in that comprising the following steps:
(1) be Fe proportioning raw material according to mass percent Nd 23.6%, B 1.11%, Cu 0.19%, Co 0.32%, Ga 0.13%, Nb 0.39%, Pr 3.1%, Tb 0.25%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.15 ~ 0.25mm;
(2) by the thin slice in step (1), add hydrogen broken furnace, and within 6 hours, make the quick-fried powder of hydrogen 550 ~ 570 DEG C of dehydrogenations; Then after airflow milling, make the magnetic that particle mean size is 1 ~ 2 μm;
(3) be Fe proportioning raw material according to mass percent Nd 14.2%, B 0.96%, Cu 0.13%, Co 0.22%, Nb 0.30%, Pr 2.6%, surplus, this raw material is put into vacuum rapid hardening spun furnace, is smelted into the thin slice of thickness between 0.25 ~ 0.35mm;
(4) by the thin slice in step (4), add hydrogen broken furnace, and make the quick-fried powder of hydrogen at 580 ~ 590 DEG C of dehydrogenase 34s hour; Then after airflow milling, make the magnetic that particle mean size is 2.5 ~ 3.5 μm;
(5) magnetic in step (2) and step (4), nanometer palladium black, nano titanium powder, nano silicon nitride titanium valve are mixed for 850:150:4:9:18 joins in mixer in mass ratio, obtain mixed powder;
(6) by the mixed powder orientation in Magnetic field press in step (5), cold isostatic compaction, put into high vacuum sintering furnace 1030 ~ 1065 DEG C sintering 2 hours, after rapid cooling is air-cooled, vacuumize 1100 ~ 1140 DEG C of double sinterings 2 hours, take out through 815 ~ 855 DEG C of temper 3 h and obtain finished product.
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| CN201410758171.0A CN104464997B (en) | 2014-12-11 | 2014-12-11 | A kind of preparation method of high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material |
| CN201610789643.8A CN106158213A (en) | 2014-12-11 | 2014-12-11 | A kind of high-coercivity neodymium-iron-boronpermanent-magnet permanent-magnet material and preparation method thereof |
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| CN106205921A (en) * | 2016-06-27 | 2016-12-07 | 无锡新大力电机有限公司 | A kind of high energy product sintered Nd-Fe-B permanent magnetic material and preparation method |
| CN109627916A (en) * | 2018-12-18 | 2019-04-16 | 浙江中杭新材料科技有限公司 | A kind of preparation method of Sintered NdFeB magnet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106935352B (en) * | 2017-03-08 | 2019-08-16 | 江苏南方永磁科技有限公司 | A kind of complex phase magnetic material and preparation method |
| CN108831645A (en) * | 2018-05-16 | 2018-11-16 | 湖南京湘磁业有限公司 | A kind of low magnetic energy product high-coercive force nanostructure neodymium iron boron powder and preparation method thereof |
| CN113096911B (en) * | 2021-04-09 | 2022-11-29 | 赣州嘉通新材料有限公司 | High-performance multilayer sintered neodymium-iron-boron permanent magnet and preparation method thereof |
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| US5454998A (en) * | 1994-02-04 | 1995-10-03 | Ybm Technologies, Inc. | Method for producing permanent magnet |
| CN1725394B (en) * | 2005-06-08 | 2010-04-07 | 浙江大学 | Method for increasing working temp and corrosion resisting property of Nd-Fe-B by adding nona silicon nitride in crystal boundary phase |
| CN101071667B (en) * | 2007-04-12 | 2010-11-24 | 北京中科三环高技术股份有限公司 | Gadolinium-containing Nd-Fe-B rare earth permanent magnetic material dn its manufacturing method |
| WO2008139556A1 (en) * | 2007-05-02 | 2008-11-20 | Hitachi Metals, Ltd. | R-t-b sintered magnet |
| CN101499346A (en) * | 2008-01-30 | 2009-08-05 | 浙江大学 | Sintered NdFeB permanent magnet with high working temperature and high corrosion resistance |
| CN102282279B (en) * | 2009-01-16 | 2013-10-02 | 日立金属株式会社 | Method for producing R-T-B sintered magnet |
| CN103996475B (en) * | 2014-05-11 | 2016-05-25 | 沈阳中北通磁科技股份有限公司 | A kind of high-performance Ne-Fe-B rare-earth permanent magnet and manufacture method with compound principal phase |
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| CN106205921A (en) * | 2016-06-27 | 2016-12-07 | 无锡新大力电机有限公司 | A kind of high energy product sintered Nd-Fe-B permanent magnetic material and preparation method |
| CN109627916A (en) * | 2018-12-18 | 2019-04-16 | 浙江中杭新材料科技有限公司 | A kind of preparation method of Sintered NdFeB magnet |
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| CN104464997B (en) | 2016-12-07 |
| CN106158213A (en) | 2016-11-23 |
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