CN104348264A - Special magnetic steel for hybrid electric vehicle driving motor and preparation method thereof - Google Patents
Special magnetic steel for hybrid electric vehicle driving motor and preparation method thereof Download PDFInfo
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- CN104348264A CN104348264A CN201410595838.XA CN201410595838A CN104348264A CN 104348264 A CN104348264 A CN 104348264A CN 201410595838 A CN201410595838 A CN 201410595838A CN 104348264 A CN104348264 A CN 104348264A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 18
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 18
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims abstract description 18
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims abstract description 18
- RKLPWYXSIBFAJB-UHFFFAOYSA-N [Nd].[Pr] Chemical compound [Nd].[Pr] RKLPWYXSIBFAJB-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 6
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 26
- 230000003078 antioxidant effect Effects 0.000 claims description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 238000005245 sintering Methods 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 7
- 150000005215 alkyl ethers Chemical class 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 2
- 230000005347 demagnetization Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000013461 design Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000006851 antioxidant defense Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic 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
- B22F3/10—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
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/023—Hydrogen absorption
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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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
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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
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/044—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by jet milling
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- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to special magnetic steel for a hybrid electric vehicle driving motor and a preparation method thereof. The composition expression of the special magnetic steel for the hybrid electric vehicle driving motor is (RE)y-Mz-Fe100-y-zB0.95-1.05, wherein y is greater than or equal to 25 and smaller than or equal to 32, z is greater than or equal to 2.5 and smaller than or equal to 5, RE consists of the following rare earth elements: praseodymium neodymium, dysprosium and terbium, wherein the content of praseodymium neodymium is 22-24.5, the content of dysprosium is 2.5-6, the content of terbium is 0.5-1.5, the sum of praseodymium neodymium, dysprosium and terbium is in the range of y, namely 25-32; M consists of the following several elements: Co, Al, Ga, Cu and Zr, wherein the content of Co is at least 2.0, the sum of the contents of the remaining four elements is 0.5-3.0, and the sum of the contents of the five elements is in the range of Z, namely 2.5-5.0. The compositions of the special magnetic steel for the hybrid electric vehicle driving motor are designed, and the production technology is improved, so that the material cost of the product is reduced, the comprehensive performance is improved, the cost performance is comprehensively promoted, and the magnetic performance and demagnetization resistance are improved.
Description
Technical field
The present invention relates to a kind of hybrid power automobile drive electric motor magnetic steel special and preparation method thereof.
Background technology
Along with global energy day is becoming tight, automobile exhaust pollution is on the rise, and the product of environmental protection and energy saving will become new favorite, and hybrid vehicle is because having that energy consumption is low, discharge of noxious gases is few and will advocating use energetically, and demand increases gradually.And the application of high temperature resistant, anti-demagnetization Nd-Fe-B magnet steel in hybrid vehicle manufacturing drive motors also increases increasingly, there is huge development space.
Current automobile has special requirement to drive motors, and driving motor for electric automobile needs 4-5 overload doubly to meet the requirement accelerated in short-term or climb, and industrial motor only requires the overload of 2 times; The maximum speed of electric automobile requires 4-5 times that reaches base speed when cruising on highway, and industrial motor only needs to reach 2 times that invariable power is base speed; Driving motor for electric automobile needs the driving habits design according to vehicle and driver, and industrial motor only need according to typical design of operating modes; Driving motor for electric automobile requires the efficiency chart (having higher efficiency in the wider range of speeds and torque range) that height power density (General Requirements reach 1KG/KW within) is become reconciled, thus can reduce car weight, extending driving range; And industrial motor considers power density, efficiency and cost usually, near rated operation point, efficiency is optimized; Driving motor for electric automobile requirement work controllability is high, lasting accuracy is high, dynamic property good; And industrial motor only has a certain specific performance requirement; Driving motor for electric automobile is installed on motor vehicle, and space is little, and under being operated in high temperature, bad weather and frequent vibration etc. adverse circumstances, and industrial motor works in a certain fixed position usually.
Compare traditional industry motor, designing requirement and the parameter of driving motor for electric automobile are higher, and the core capabilities of motor decides according to the magnet in motor, this is just quite high to the performance requirement of magnetic steel of motor, magnet steel is needed to have the characteristics such as high-performance, high-coercive force and high temperature resistant, anti-demagnetization, need the combination property of magnet steel to reach capacity, the present invention is intended to design a kind of hybrid power automobile drive electric motor magnetic steel special and preparation method thereof.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, a kind of hybrid power automobile drive electric motor magnetic steel special is provided.
Another object of the present invention is to provide a kind of preparation method of hybrid power automobile drive electric motor magnetic steel special.
The technical solution adopted for the present invention to solve the technical problems is:
Hybrid power automobile drive electric motor magnetic steel special, the composition expression formula of described hybrid power automobile drive electric motor magnetic steel special is: (RE)
y-M
z-Fe
100-y-zb
0.95-1.05wherein 25≤y≤32,2.5≤z≤5, RE is made up of following rare earth element: praseodymium neodymium, dysprosium and terbium, wherein the content of praseodymium neodymium is 22 ~ 24.5, the content of dysprosium is 2.5 ~ 6, the content of terbium is 0.5 ~ 1.5, praseodymium neodymium, dysprosium and terbium content sum scope are the scope of y, and namely 25 ~ 32, M are made up of following several element: Co, Al, Ga, Cu and Zr, wherein the content of Co is at least 2.0, all the other four kinds of constituent content sums are 0.5 ~ 3.0, five kinds of constituent content sum scopes is the scope of Z, namely 2.5 ~ 5.0.
Realize hybrid power automobile drive electric motor magnetic steel special high temperature resistant, high-performance, high-coercive force and anti-demagnetization, each element composition of magnet steel is very crucial, especially dysprosium, the content of terbium and Co element, hybrid power automobile drive electric motor magnetic steel special of the present invention passes through its composition appropriate design, adjust the content of each trace element, wherein the content of dysprosium is 2.5 ~ 6, the content of terbium is 0.5 ~ 1.5, the content of Co is at least 2.0, be equipped with production technology of the present invention, the magnet steel product cost aspect General Promotion obtained, especially high temperature resistant and anti-demagnetization performance significantly improves.In addition present inventor study find when dysprosium and terbium content not within the scope of the invention, and the content of Co is less than 2.0, the magnet steel performance obtained by production technology of the present invention does not reach the performance of hybrid power automobile drive electric motor magnetic steel special of the present invention.
A preparation method for hybrid power automobile drive electric motor magnetic steel special, described method is carried out as follows:
(1) utilize vacuum induction rapid hardening furnace, by ready all raw materials under argon shield, melt at 1480-1580 DEG C of temperature, at 1450 ~ 1550 DEG C of refining 30 ~ 35min after fusing, then cooling is cast into 0.3-0.6 μm of thick slab;
(2) slab of step (1) is broken through hydrogen, obtains particle diameter and is less than the thick magnetic of 40 object;
(3) mixed with antioxidant by the thick magnetic that step (2) obtains, be then broken into the thin magnetic of 2.5-3.0 μm further across airflow milling, the consumption of antioxidant is 1.0% of thick magnetic quality;
(4) mixed with antioxidant by the thin magnetic that step (3) obtains, the consumption of antioxidant is 1.2% of thin magnetic quality, adopts nitrogen protection stuffing box press-molding, Vacuum Package blank, through isostatic cool pressing, then unpacking in nitrogen protection stuffing box, mounted box;
(5) in the complete laggard vacuum sintering furnace of mounted box under vacuum degree 0.1pa dewaxing treatment, in 1050 DEG C ~ 1090 DEG C sintering processes 4-5h after dewaxing, again respectively at 890 DEG C-920 DEG C and 470 DEG C of-510 DEG C of Ageing Treatment 2h and 3-4.5h, final acquisition hybrid power automobile drive electric motor magnetic steel special.
Antioxidant in described step (3) and step (4) is fully uniformly mixed by sorbierite, polyethylene oxide alkyl ethers and benzinum and forms, sorbierite and mass percentage content≤10% both polyethylene oxide alkyl ethers.
Step (3) air-flow grinds oxygen content in middle system and controls at 60-80ppm.
the invention has the beneficial effects as follows:
1, by design the composition of hybrid power automobile drive electric motor magnetic steel special and production technology is improved, the material cost of product is reduced, combination property improves, and General Promotion in cost performance, improves magnetic property, anti-demagnetization;
2. adopt fast solidifying slab, hydrogen decrepitation route, take forced airflow abrasive dust simultaneously, control granularity of magnet powder distribution, realize particle mean size between 2.5 ~ 3.0 microns, adopt multi-steps sintering and Ageing Treatment, reduce most high sintering temperature, realize crystal grain thinning, improve the target of micro-structural;
3. carry out process antioxidant defense system, adopt the antioxidant of independent research, powder process and compressing time total process protective magnetic, avoid oxidation to occur, eliminate and decline and temperature-resistance characteristic reduction because being oxidized the magnetic property caused;
4. improve powder particle size distribution, improve magnet structure, improve the stability and magnetism energy uniformity of magnet.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in further detail.
Praseodymium neodymium: purchased from rare earth new material Co., Ltd of Baogang; Ferro-boron: purchased from the international boron alloy Co., Ltd in Liaoyang, pure iron, selects Wuhan Iron and Steel Plant pure iron, and other raw material adopts commercial convenient source.
Airflow milling: Jilin Xin great Ke electromechanical technology co., Ltd, model QLMR-300, nozzle exit pressure is set to 0.58-0.62Mpa, and separation wheel rotating speed is arranged on 3300-3700r/min.
Embodiment 1:
Hybrid power automobile drive electric motor magnetic steel special, the composition expression formula of described hybrid power automobile drive electric motor magnetic steel special is: (RE)
25-M
2.5-Fe
72.5b
0.95rE is made up of following rare earth element: praseodymium neodymium, dysprosium and terbium, wherein the content of praseodymium neodymium is 22, the content of dysprosium is 2.5, the content of terbium is that 0.5, M is made up of following several element: Co, Al, Ga, Cu and Zr, and wherein the content of Co is 2.0, the content of Al is that the content of 0.1, Ga is 0.2, the content of Cu be 0.1 and the content of Zr be 0.1.
The preparation method of above-mentioned hybrid power automobile drive electric motor magnetic steel special carries out as follows:
(1) utilize vacuum induction rapid hardening furnace, by ready all raw materials under argon shield, melt at 1480-1530 DEG C of temperature, at 1450 ~ 1500 DEG C of refining 30 ~ 35min after fusing, then cooling is cast into 0.3-0.4 μm of thick slab;
(2) slab of step (1) is broken through hydrogen, obtains particle diameter and is less than the thick magnetic of 40 object;
(3) the thick magnetic that step (2) obtains is mixed with antioxidant, then the thin magnetic of 2.5-2.8 μm is broken into further across airflow milling, the consumption of antioxidant is 1.0% of thick magnetic quality, and air-flow grinds oxygen content in middle system and controls at 60-80ppm;
(4) mixed with antioxidant by the thin magnetic that step (3) obtains, the consumption of antioxidant is 1.2% of thin magnetic quality, adopts nitrogen protection stuffing box press-molding, Vacuum Package blank, through isostatic cool pressing, then unpacking in nitrogen protection stuffing box, mounted box;
(5) in the complete laggard vacuum sintering furnace of mounted box under vacuum degree 0.1pa dewaxing treatment, in 1050 DEG C ~ 1070 DEG C sintering processes 5h after dewaxing, again respectively at 890 DEG C-900 DEG C and 470 DEG C of-490 DEG C of Ageing Treatment 2h and 4.5h, final acquisition hybrid power automobile drive electric motor magnetic steel special.
Antioxidant in described step (3) and step (4) is by sorbierite 4%(mass percent), polyethylene oxide alkyl ethers 4% and benzinum 92% be fully uniformly mixed and form.
Embodiment 2:
Hybrid power automobile drive electric motor magnetic steel special, the composition expression formula of described hybrid power automobile drive electric motor magnetic steel special is: (RE)
32-M
5.0-Fe
63b
1.05rE is made up of following rare earth element: praseodymium neodymium, dysprosium and terbium, wherein the content of praseodymium neodymium is 24.5, the content of dysprosium is 6, the content of terbium is that 1.5, M is made up of following several element: Co, Al, Ga, Cu and Zr, and wherein the content of Co is 3.0, the content of Al is that the content of 0.5, Ga is 0.5, the content of Cu be 0.5 and the content of Zr be 0.5.
The preparation method of above-mentioned hybrid power automobile drive electric motor magnetic steel special carries out as follows:
(1) utilize vacuum induction rapid hardening furnace, by ready all raw materials under argon shield, melt at 1550-1580 DEG C of temperature, at 1500 ~ 1550 DEG C of refining 30 ~ 35min after fusing, then cooling is cast into 0.5-0.6 μm of thick slab;
(2) slab of step (1) is broken through hydrogen, obtains particle diameter and is less than the thick magnetic of 40 object;
(3) the thick magnetic that step (2) obtains is mixed with antioxidant, then the thin magnetic of 2.8-3.0 μm is broken into further across airflow milling, the consumption of antioxidant is 1.0% of thick magnetic quality, and air-flow grinds oxygen content in middle system and controls at 60-80ppm;
(4) mixed with antioxidant by the thin magnetic that step (3) obtains, the consumption of antioxidant is 1.2% of thin magnetic quality, adopts nitrogen protection stuffing box press-molding, Vacuum Package blank, through isostatic cool pressing, then unpacking in nitrogen protection stuffing box, mounted box;
(5) in the complete laggard vacuum sintering furnace of mounted box under vacuum degree 0.1pa dewaxing treatment, in 1070 DEG C ~ 1090 DEG C sintering processes 4h after dewaxing, again respectively at 910 DEG C-920 DEG C and 500 DEG C of-510 DEG C of Ageing Treatment 2h and 3h, final acquisition hybrid power automobile drive electric motor magnetic steel special.
Antioxidant in described step (3) and step (4) is by sorbierite 2%(mass percent), polyethylene oxide alkyl ethers 8% and benzinum 90% be fully uniformly mixed and form.
comparative example:
The composition expression formula of comparative example magnet steel is with embodiment 2, and difference is dysprosium, the content of terbium and Co element is different from protection range designed by the present invention.
Comparative example magnet steel, composition expression formula is: (RE)
32-M
5.0-Fe
63b
1.05rE is made up of following rare earth element: praseodymium neodymium, dysprosium and terbium, wherein the content of praseodymium neodymium is 22, the content of dysprosium is 8, the content of terbium is that 2, M is made up of following several element: Co, Al, Ga, Cu and Zr, and wherein the content of Co is 1.5, the content of Al is that the content of 1.0, Ga is 1.5, the content of Cu be 1.0 and the content of Zr be 1.0.
The preparation method of above-mentioned hybrid power automobile drive electric motor magnetic steel special carries out as follows:
(1) utilize vacuum induction rapid hardening furnace, by ready all raw materials under argon shield, melt at 1550-1580 DEG C of temperature, at 1500 ~ 1550 DEG C of refining 30 ~ 35min after fusing, then cooling is cast into 0.5-0.6 μm of thick slab;
(2) slab of step (1) is broken through hydrogen, obtains particle diameter and is less than the thick magnetic of 40 object;
(3) the thick magnetic that step (2) obtains is mixed with antioxidant, then the thin magnetic of 2.8-3.0 μm is broken into further across airflow milling, the consumption of antioxidant is 1.0% of thick magnetic quality, and air-flow grinds oxygen content in middle system and controls at 60-80ppm;
(4) mixed with antioxidant by the thin magnetic that step (3) obtains, the consumption of antioxidant is 1.2% of thin magnetic quality, adopts nitrogen protection stuffing box press-molding, Vacuum Package blank, through isostatic cool pressing, then unpacking in nitrogen protection stuffing box, mounted box;
(5) in the complete laggard vacuum sintering furnace of mounted box under vacuum degree 0.1pa dewaxing treatment, in 1070 DEG C ~ 1090 DEG C sintering processes 4h after dewaxing, again respectively at 910 DEG C-920 DEG C and 500 DEG C of-510 DEG C of Ageing Treatment 2h and 3h, final acquisition hybrid power automobile drive electric motor magnetic steel special.
Antioxidant in described step (3) and step (4) is by sorbierite 2%(mass percent), polyethylene oxide alkyl ethers 8% and benzinum 90% be fully uniformly mixed and form.
The obtained hybrid power automobile drive electric motor magnetic steel special of embodiment 1 and 2, magnet steel that comparative example obtains and commercial Japanese NEOMAX(trade mark NMX-S34GH), TDK(35NX) the magnetic property testing result of magnet steel is as follows:
Working temperature defines: under assigned temperature, be incubated 2 hours, when the magnetic irreversible loss of magnet is less than 5%, this assigned temperature is defined as the working temperature of this magnet.
By comparing, can find out that magnetic steel special of the present invention reaches the technical merit exceeding the close trade mark product of foreign well-known enterprise even in some aspects in remanent magnetism, coercive force, HCJ, maximum magnetic energy product and maximum operation temperature etc.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (3)
1. hybrid power automobile drive electric motor magnetic steel special, is characterized in that: the composition expression formula of described hybrid power automobile drive electric motor magnetic steel special is: (RE)
y-M
z-Fe
100-y-zb
0.95-1.05wherein 25≤y≤32,2.5≤z≤5, RE is made up of following rare earth element: praseodymium neodymium, dysprosium and terbium, wherein the content of praseodymium neodymium is 22 ~ 24.5, and the content of dysprosium is 2.5 ~ 6, and the content of terbium is 0.5 ~ 1.5, M is made up of following several element: Co, Al, Ga, Cu and Zr, and wherein the content of Co is at least 2.0.
2. a preparation method for hybrid power automobile drive electric motor magnetic steel special according to claim 1, is characterized in that: described method is carried out as follows:
(1) utilize vacuum induction rapid hardening furnace, by ready all raw materials under argon shield, melt at 1480-1580 DEG C of temperature, at 1450 ~ 1550 DEG C of refining 30 ~ 35min after fusing, then cooling is cast into 0.3-0.6 μm of thick slab;
(2) slab of step (1) is broken through hydrogen, obtains particle diameter and is less than the thick magnetic of 40 object;
(3) mixed with antioxidant by the thick magnetic that step (2) obtains, be then broken into the thin magnetic of 2.5-3.0 μm further across airflow milling, the consumption of antioxidant is 1.0% of thick magnetic quality;
(4) mixed with antioxidant by the thin magnetic that step (3) obtains, the consumption of antioxidant is 1.2% of thin magnetic quality, adopts nitrogen protection stuffing box press-molding, Vacuum Package blank, through isostatic cool pressing, then unpacking in nitrogen protection stuffing box, mounted box;
(5) in the complete laggard vacuum sintering furnace of mounted box under vacuum degree 0.1pa dewaxing treatment, in 1050 DEG C ~ 1090 DEG C sintering processes 4-5h after dewaxing, again respectively at 890 DEG C-920 DEG C and 470 DEG C of-510 DEG C of Ageing Treatment 2h and 3-4.5h, final acquisition hybrid power automobile drive electric motor magnetic steel special;
Antioxidant in described step (3) and step (4) is fully uniformly mixed by sorbierite, polyethylene oxide alkyl ethers and benzinum and forms, sorbierite and mass percentage content≤10% both polyethylene oxide alkyl ethers.
3. the preparation method of hybrid power automobile drive electric motor magnetic steel special according to claim 1, is characterized in that: step (3) air-flow grinds oxygen content in middle system and controls at 60-80ppm.
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