CN107195414A - One kind (Nd, Y) Fe B rare-earth permanent magnets and preparation method thereof - Google Patents

One kind (Nd, Y) Fe B rare-earth permanent magnets and preparation method thereof Download PDF

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CN107195414A
CN107195414A CN201710390329.7A CN201710390329A CN107195414A CN 107195414 A CN107195414 A CN 107195414A CN 201710390329 A CN201710390329 A CN 201710390329A CN 107195414 A CN107195414 A CN 107195414A
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phase
rare
grain
magnet
main
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严密
彭白星
马天宇
魏中华
赵栋梁
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Zhejiang University ZJU
Zhejiang Innuovo Magnetics Industry Co Ltd
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Zhejiang University ZJU
Zhejiang Innuovo Magnetics Industry Co Ltd
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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
    • 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
    • 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
    • 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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  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

The present invention discloses one kind (Nd, Y) Fe B rare-earth permanent magnets and preparation method thereof.Rare-earth permanent magnet prepared by the present invention includes main-phase alloy and the auxiliary alloy of 0.01~10% Grain-Boundary Phase for being calculated in mass percent 90~99.99%.Replace Nd with Y portion in main-phase alloy composition, utilize Y2Fe14B unusual temperatures improve the temperature stability of magnet, and the rationally alloying element in design optimization composition, make magnet is as much as possible in sintering process form 2：14：The last 1 magnetic phase, it is ensured that permanent magnet has higher intrinsic magnetic properties energy；The new Grain-Boundary Phase by preparing, while further improving magnet comprehensive magnetic energy, also improves the intrinsic corrosion stability of magnet.One kind (Nd, Y) the Fe B rare-earth permanent magnets of the present invention not only have preferable temperature stability, and higher corrosion resisting property and comprehensive magnetic can also meet the demand in market；Rare earth element y furthermore achieved that cost control compared to the heavy rare earth element Dy and Tb of high price.

Description

A kind of (Nd, Y)-Fe-B rare-earth permanent magnets and preparation method thereof
Technical field
The present invention relates to a kind of (Nd, Y)-Fe-B rare-earth permanent magnets and preparation method thereof
Background technology
The characteristics of third generation rare earth permanent-magnetic material neodymium iron boron is because of high remanent magnetism, high-coercive force and high energy product, extensively should For fields such as power electronics, communication, information, motor, communications and transportation, office automation, medicine equipment, military affairs.In many feelings Under condition, Nd-Fe-B permanent magnetic, which is known from experience, to be applied under the higher environment of temperature, and at this moment the temperature stability of magnet just seems particularly significant, Which dictates that can magnet continue to keep in high temperature environments higher magnetic property.Traditionally improve sintered magnet temperature stability Main path be to improve the coercivity of room temperature, so typically can be using addition heavy rare earth element such as Tb, Dy etc..But, due to Reserves of the heavy rare earth in the earth's crust are less, price is very high, no matter come from economy, or the angle of the sustainable use of rare earth resources Say, be required for finding a kind of new mode improving the temperature stability of magnet.
In addition to improving the room temperature coercivity of magnet, the magnetocrystalline anisotropy field of magnet is as the variation tendency of temperature is to magnetic The temperature stability of body is also particularly significant, because which dictates that in temperature-rise period, the speed of the coercivity fall off rate of magnet. Because rare earth element y does not have 4f electronics, Y2Fe14The magnetocrystalline of B compounds is different mainly to be contributed by Fe sublattice 's.Forefathers are for Y2Fe14The research of B monocrystal, which shows that its magnetocrystalline is different, to be higher than crystal anisotropy constant K in expression formula1 Each rank constant can ignore, so its anisotropy energy is main by K1Item is determined.And K1Have in certain temperature range There is positive temperature coefficient, i.e., as temperature rise becomes larger.So rare earth element y formed 2:14:1 compound exists There is the abnormal temperature characteristic different from other rare earth compounds in specific temperature range.
In summary, Nd is replaced with rare earth element y part in the rare-earth permanent magnet of production, using Y2Fe14B's is anti- Normal temperatures improve the temperature stability of magnet.In dependence of the ferromagnetism to temperature of specific temperature range inner magnet Property can weaken or even become positive relationship, and this keeps its magnetic property to have vital effect for magnet under elevated temp. Meanwhile, proved by first-principles calculations, Y element can tend to enter principal phase after neodymium iron boron magnetic body is added, and keep 2：14：1 The holding of ferromagnetic relative magnetism energy is also particularly important.The reserves of Y element are only less than Ce and La in rare earth element, are a kind of Gao Feng Spend rare earth element.So producing rare-earth permanent magnet using Y element, cost of implementation control is additionally aided, alleviates current international rare earth The severe situation of industry.
The content of the invention
The purpose of the present invention be overcome the deficiencies in the prior art there is provided a kind of (Nd, Y)-Fe-B rare-earth permanent magnets and its Preparation method
One kind (Nd, Y)-Fe-B rare-earth permanent magnets include be calculated in mass percent 90~99.99% main-phase alloy and 0.01~10% auxiliary alloy of Grain-Boundary Phase.
Main-phase alloy composition is calculated as (Y with atomic percentagexNd1-x-yREy)uFe100-u-v-wMvBw, RE is in addition to Y and Nd Other rare earth elements in one or more, M be Nb, V, Ti, Co, Cr, Mo, Mn, Ni, Ga, Zr, Ta, Ag, Au, Al, Pb, One or more in Cu, Si element；X, y, u, v and w meet following relation：0.01≤x≤0.6,0 ＜ y≤0.1,12≤u ≤ 18,0 ＜ v≤2,5.6≤w≤7.
The auxiliary alloying component of Grain-Boundary Phase is calculated as R with atomic percentage100-zM’z, R is the one or more in rare earth element, M ' For the one or more in Cu, H, O, F, Fe, Ga, Ti, Al, Co, Nb, Zr, Ta, Si, V, Mo, Mn, Ag, Mg, Zn element；Z expires Foot：0<z<100.
A kind of the step of preparation method of (Nd, Y)-Fe-B rare-earth permanent magnets, is specific as follows：
1) dispensing is carried out according to the main-phase alloy composition of design, is higher than 10 in vacuum-2In Pa vacuum medium frequency induction furnace Melting main-phase alloy, uses strip cast alloys technology to obtain main-phase alloy rejection tablet of the thickness for 0.2~0.5mm, then quick-fried by hydrogen The main-phase alloy powder that particle mean size is 3~4 μm is prepared with air-flow grinding process；
2) dispensing is carried out according to the auxiliary alloying component of Grain-Boundary Phase of design, then passes sequentially through melting, thick broken, ball milling and prepare and put down Equal granularity is 0.01~3.0 μm of the auxiliary alloy powder of Grain-Boundary Phase；
3) the auxiliary alloy powder of Grain-Boundary Phase is well mixed under nitrogen protection with main-phase alloy powder, in 1.5~2T magnetic Orientation die mould is carried out off field, obtains green compact.Wherein, the auxiliary alloy powder of Grain-Boundary Phase accounts for the 0.01~10% of total powder quality；
4) obtained green compact are subjected to 1~3min of isostatic cool pressing between Vacuum Package, 15~20MPa, are put into high vacuum malleation Sintering furnace, sinters between 1040~1100 DEG C and carries out carrying out between one-level tempering, 480~620 DEG C between 2.5~4h, 860~920 DEG C Second annealing, obtains rare-earth permanent magnet.
The present invention has the advantage that compared with prior art：1) by replacing Nd, profit with Y portion in principal phase composition Use Y2Fe14B unusual temperatures improve the temperature stability of permanent magnet；2) conjunction in reasonable design optimization composition is passed through Gold element, makes magnet is as much as possible in sintering process to form 2：14：The last 1 magnetic phase, it is ensured that permanent magnet has higher interior Report magnetic property.3) it is most of after being added due to Y all to enter principal phase, so the present invention is prepared for new Grain-Boundary Phase by design, While further improving magnet comprehensive magnetic energy, the intrinsic corrosion stability of magnet is also improved；4) present invention is by rightly excellent Change sintering process and process of thermal treatment, make to prevent growing up for main phase grain while magnet full densification again, it is further full Foot application demand；5) Y is as a kind of high abundance rare earth element, compared to the Nd that price is high, abundance is low, Pr, Dy, and Tb etc. is dilute Earth elements, can promote the co-ordination of supply and marketing of rare-earth products while cost is reduced, and protect precious rare earth resources.
Embodiment
One kind (Nd, Y)-Fe-B rare-earth permanent magnets include be calculated in mass percent 90~99.99% main-phase alloy and 0.01~10% auxiliary alloy of Grain-Boundary Phase.
Main-phase alloy composition is calculated as (Y with atomic percentagexNd1-x-yREy)uFe100-u-v-wMvBw, RE is in addition to Y and Nd Other rare earth elements in one or more, M be Nb, V, Ti, Co, Cr, Mo, Mn, Ni, Ga, Zr, Ta, Ag, Au, Al, Pb, One or more in Cu, Si element；X, y, u, v and w meet following relation：0.01≤x≤0.6,0 ＜ y≤0.1,12≤u ≤ 18,0 ＜ v≤2,5.6≤w≤7.
The auxiliary alloying component of Grain-Boundary Phase is calculated as R with atomic percentage100-zM’z, R is the one or more in rare earth element, M ' For the one or more in Cu, H, O, F, Fe, Ga, Ti, Al, Co, Nb, Zr, Ta, Si, V, Mo, Mn, Ag, Mg, Zn element；Z expires Foot：0<z<100.
A kind of the step of preparation method of (Nd, Y)-Fe-B rare-earth permanent magnets, is specific as follows：
1) dispensing is carried out according to the main-phase alloy composition of design, is higher than 10 in vacuum-2In Pa vacuum medium frequency induction furnace Melting main-phase alloy, uses strip cast alloys technology to obtain main-phase alloy rejection tablet of the thickness for 0.2~0.5mm, then quick-fried by hydrogen The main-phase alloy powder that particle mean size is 3~4 μm is prepared with air-flow grinding process；
2) dispensing is carried out according to the auxiliary alloying component of Grain-Boundary Phase of design, then passes sequentially through melting, thick broken, ball milling and prepare and put down Equal granularity is 0.01~3.0 μm of the auxiliary alloy powder of Grain-Boundary Phase；
3) the auxiliary alloy powder of Grain-Boundary Phase is well mixed under nitrogen protection with main-phase alloy powder, in 1.5~2T magnetic Orientation die mould is carried out off field, obtains green compact.Wherein, the auxiliary alloy powder of Grain-Boundary Phase accounts for the 0.01~10% of total powder quality；
4) obtained green compact are subjected to 1~3min of isostatic cool pressing between Vacuum Package, 15~20MPa, are put into high vacuum malleation Sintering furnace, sinters between 1040~1100 DEG C and carries out carrying out between one-level tempering, 480~620 DEG C between 2.5~4h, 860~920 DEG C Second annealing, obtains rare-earth permanent magnet.
With reference to specific embodiment, the present invention will be further described, but the present invention is not limited only to following implementation Example：
Embodiment 1：
1) in terms of atomic percentage, composition is (Nd0.85Y0.05Pr0.1)12Fe81.95Co0.05Al0.2B5.8Principal phase in vacuum Degree is higher than 10-2After Pa vacuum medium frequency induction furnace melting, strip cast alloys technology is used to obtain corresponding principal phase of the thickness for 0.3mm Rejection tablet, by the main-phase alloy powder that hydrogen is quick-fried and air-flow grinding process preparation particle mean size is 3.3 μm；
2) it is Nd by composition in terms of atomic percentage70Cu30The auxiliary alloy of Grain-Boundary Phase pass sequentially through melting, thick broken, ball milling Prepare, crystal boundary modified phase powder mean particle sizes are 1.5 μm；
3) the auxiliary alloyed powder of Grain-Boundary Phase that the main-phase alloy powder and mass percent for being 90% by mass percent are 10% After end is well mixed, the oriented moulding under 2T magnetic field, and green compact are made through 17MPa isostatic cool pressings；
4) obtained green compact are put into high vacuum positive pressure sintering furnace, 4h are sintered at 1080 DEG C, 890 DEG C carry out one-level tempering, 680 DEG C of progress second annealings, obtain rare-earth permanent magnet.
5) magnet magnetic property is Br=13.1kGs, Hcj=12.4kOe, (BH)max=44.8MGOe；
At 20 DEG C~150 DEG C, the coercive force temperature coefficient of magnet for -0.49%/DEG C.
Comparative example 1：
1) in terms of atomic percentage, composition is (Nd0.9Pr0.1)12Fe82.2B5.8Alloy vacuum be higher than 10-2Pa's After vacuum medium frequency induction furnace melting, strip cast alloys technology is used to obtain corresponding rejection tablet of the thickness for 0.31mm, it is quick-fried gentle by hydrogen Flow grinding process and prepare the alloy powder that particle mean size is 3.3 μm；
2) by a certain amount of alloy powder under 2T magnetic field oriented moulding, and green compact are made through 17MPa isostatic cool pressings；
3) obtained green compact are put into high vacuum positive pressure sintering furnace, 4h are sintered at 1080 DEG C, 890 DEG C carry out one-level tempering, 580 DEG C of progress second annealings, obtain rare-earth permanent magnet.
5) magnet magnetic property is Br=12.9kGs, Hcj=12.1kOe, (BH)max=44.2MGOe；
At 20 DEG C~150 DEG C, the coercive force temperature coefficient of magnet for -0.53%/DEG C.
Explanation：By the comparison of comparative example 1 and embodiment 1 it can be found that adding every magnetic of the magnet of yttrium in embodiment 1 Performance indications are all better than the magnet in comparative example, and temperature coefficient will substantially optimize, and further illustrate the present invention not only real The raising of temperature stability is showed, and the magnetic property of magnet can be made to keep preferable.The comprehensive magnetic of magnet can also reach The standard of the commercial trade mark, reduce further the cost of raw material, meet application demand.Meanwhile, found by contrasting, the present invention The design of the auxiliary alloy of Grain-Boundary Phase is added in (embodiment 1), the design optimization and Technology for Heating Processing of alloying element in magnet composition Improvement optimization all be ensure magnet performance it is preferable the reason for.
Embodiment 2：
1) in terms of atomic percentage, composition is (Nd0.7Y0.2Pr0.1)14Fe79.8Co0.1Ga0.2Al0.2B5.7Principal phase in vacuum Degree is higher than 10-2After Pa vacuum medium frequency induction furnace melting, strip cast alloys technology is used to obtain corresponding principal phase of the thickness for 0.32mm Rejection tablet, by the main-phase alloy powder that hydrogen is quick-fried and air-flow grinding process preparation particle mean size is 3.4 μm；
2) it is Pr by composition in terms of atomic percentage67.3Cu32.7 the auxiliary alloy of Grain-Boundary Phase passes sequentially through melting, thick broken, ball Prepared by mill, crystal boundary modified phase powder mean particle sizes are 1.5 μm；
3) the auxiliary alloy powder of Grain-Boundary Phase that the main-phase alloy powder and mass percent for being 95% by mass percent are 5% After well mixed, the oriented moulding under 2T magnetic field, and green compact are made through 17MPa isostatic cool pressings；
4) obtained green compact are put into high vacuum positive pressure sintering furnace, 4h are sintered at 1075 DEG C, 980 DEG C carry out one-level tempering, 680 DEG C of progress second annealings, obtain rare-earth permanent magnet.
5) magnet magnetic property is Br=12.9kGs, Hcj=12.2kOe, (BH)max=43.9MGOe；
At 20 DEG C~150 DEG C, the coercive force temperature coefficient of magnet for -0.48%/DEG C.
Embodiment 3：
1) in terms of atomic percentage, composition is (Nd0.5Y0.4Pr0.1)17Fe76.8Co0.2Ga0.5B5.5Principal phase it is high in vacuum In 10-2After Pa vacuum medium frequency induction furnace melting, use strip cast alloys technology to obtain thickness and got rid of for 0.32mm corresponding principal phase Piece, by the main-phase alloy powder that hydrogen is quick-fried and air-flow grinding process preparation particle mean size is 3.3 μm；
2) it is Ce by composition in terms of atomic percentage72Cu28The auxiliary alloy of Grain-Boundary Phase pass sequentially through melting, thick broken, ball milling Prepare, crystal boundary modified phase powder mean particle sizes are 1.5 μm；
3) the auxiliary alloy powder of Grain-Boundary Phase that the main-phase alloy powder and mass percent for being 96% by mass percent are 4% After well mixed, the oriented moulding under 2T magnetic field, and green compact are made through 17MPa isostatic cool pressings；
4) obtained green compact are put into high vacuum positive pressure sintering furnace, 4h are sintered at 1080 DEG C, 960 DEG C carry out one-level tempering, 670 DEG C of progress second annealings, obtain rare-earth permanent magnet.
5) magnet magnetic property is Br=12.2kGs, Hcj=10.3kOe, (BH)max=38.6MGOe；20 DEG C~150 DEG C, the coercive force temperature coefficient of magnet for -0.51%/DEG C.

Claims (3)

1. a kind of (Nd, Y)-Fe-B rare-earth permanent magnets, it is characterised in that：It is calculated in mass percent including 90~99.99% master Phase alloy and the auxiliary alloy of 0.01~10% Grain-Boundary Phase；
Main-phase alloy composition is calculated as (Y with atomic percentagexNd1-x-yREy)uFe100-u-v-wMvBw, RE is other in addition to Y and Nd One or more in rare earth element, M is Nb, V, Ti, Co, Cr, Mo, Mn, Ni, Ga, Zr, Ta, Ag, Au, Al, Pb, Cu, Si member One or more in element；X, y, u, v and w meet following relation：0.01≤x≤0.6,0 ＜ y≤0.1,12≤u≤18,0 ＜ v ≤2、5.6≤w≤7。
2. one kind (Nd, Y)-Fe-B rare-earth permanent magnets according to claim 1, it is characterised in that：Described Grain-Boundary Phase is auxiliary Alloying component is calculated as R with atomic percentage100-zM’z, R be rare earth element in one or more, M ' be Cu, H, O, F, Fe, Ga, One or more in Ti, Al, Co, Nb, Zr, Ta, Si, V, Mo, Mn, Ag, Mg, Zn element；Z is met：0<z<100.
3. the preparation method of one kind (Nd, Y)-Fe-B rare-earth permanent magnets according to claim 1 or 2, it is characterised in that：Should The step of preparation method, is specific as follows：
1) dispensing is carried out according to the main-phase alloy composition of design, is higher than 10 in vacuum-2Melting in Pa vacuum medium frequency induction furnace Main-phase alloy, uses strip cast alloys technology to obtain main-phase alloy rejection tablet of the thickness for 0.2~0.5mm, then quick-fried gentle by hydrogen Flow grinding process and prepare the main-phase alloy powder that particle mean size is 3~4 μm；
2) dispensing is carried out according to the auxiliary alloying component of Grain-Boundary Phase of design, then passes sequentially through melting, thick broken, ball milling and prepare average grain Spend the auxiliary alloy powder of Grain-Boundary Phase for 0.01~3.0 μm；
3) the auxiliary alloy powder of Grain-Boundary Phase is well mixed under nitrogen protection with main-phase alloy powder, under 1.5~2T magnetic field Orientation die mould is carried out, green compact are obtained.Wherein, the auxiliary alloy powder of Grain-Boundary Phase accounts for the 0.01~10% of total powder quality；
4) obtained green compact are subjected to 1~3min of isostatic cool pressing between Vacuum Package, 15~20MPa, are put into high vacuum malleation sintering Stove, sinters between 1040~1100 DEG C and carries out carrying out two grades between one-level tempering, 480~620 DEG C between 2.5~4h, 860~920 DEG C Tempering, obtains rare-earth permanent magnet.
CN201710390329.7A 2017-05-27 2017-05-27 One kind (Nd, Y) Fe B rare-earth permanent magnets and preparation method thereof Pending CN107195414A (en)

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CN108109798A (en) * 2017-12-01 2018-06-01 程桂平 The preparation method of transformer permanent magnet
CN108597709A (en) * 2018-04-26 2018-09-28 安徽省瀚海新材料股份有限公司 A kind of preparation method of corrosion-resistant sintered NdFeB
CN108806911A (en) * 2018-04-26 2018-11-13 安徽省瀚海新材料股份有限公司 A kind of neodymium iron boron magnetic body and preparation method thereof
CN109087768A (en) * 2018-08-30 2018-12-25 江西理工大学 Nd-Fe-B permanent magnet material and preparation method thereof for magnetic suspension system
CN109087767A (en) * 2018-08-08 2018-12-25 杭州电子科技大学 A kind of crystal boundary spreads the neodymium iron boron magnetic body and preparation method thereof of nanoscale diffusate in situ
CN110330331A (en) * 2019-07-12 2019-10-15 无锡工艺职业技术学院 A kind of flexible piezoelectric ceramic material and preparation method thereof
CN110330330A (en) * 2019-07-12 2019-10-15 无锡工艺职业技术学院 A kind of microwave dielectric ceramic material and preparation method thereof with high magnetic permeability
CN111210963A (en) * 2020-02-07 2020-05-29 钢铁研究总院 High-performance yttrium cerium based rare earth permanent magnet and preparation method thereof
CN112034905A (en) * 2020-08-21 2020-12-04 浙江英洛华磁业有限公司 Automatic temperature rise control method for medium-frequency induction smelting of neodymium iron boron melt

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JP2015035455A (en) * 2013-08-08 2015-02-19 株式会社豊田中央研究所 Material alloy for sintered magnet, rare earth sintered magnet, and method for producing them
CN106252009A (en) * 2016-07-26 2016-12-21 浙江大学 A kind of high-performance richness La/Ce/Y rare-earth permanent magnet based on rare earth hydride interpolation and preparation method thereof

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JP2015035455A (en) * 2013-08-08 2015-02-19 株式会社豊田中央研究所 Material alloy for sintered magnet, rare earth sintered magnet, and method for producing them
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CN108109799A (en) * 2017-12-01 2018-06-01 程桂平 The preparation method of generator permanent magnet
CN108109798A (en) * 2017-12-01 2018-06-01 程桂平 The preparation method of transformer permanent magnet
CN108597709A (en) * 2018-04-26 2018-09-28 安徽省瀚海新材料股份有限公司 A kind of preparation method of corrosion-resistant sintered NdFeB
CN108806911A (en) * 2018-04-26 2018-11-13 安徽省瀚海新材料股份有限公司 A kind of neodymium iron boron magnetic body and preparation method thereof
CN108597709B (en) * 2018-04-26 2020-12-11 安徽省瀚海新材料股份有限公司 Preparation method of corrosion-resistant sintered neodymium iron boron
CN109087767A (en) * 2018-08-08 2018-12-25 杭州电子科技大学 A kind of crystal boundary spreads the neodymium iron boron magnetic body and preparation method thereof of nanoscale diffusate in situ
CN109087768A (en) * 2018-08-30 2018-12-25 江西理工大学 Nd-Fe-B permanent magnet material and preparation method thereof for magnetic suspension system
CN110330331A (en) * 2019-07-12 2019-10-15 无锡工艺职业技术学院 A kind of flexible piezoelectric ceramic material and preparation method thereof
CN110330330A (en) * 2019-07-12 2019-10-15 无锡工艺职业技术学院 A kind of microwave dielectric ceramic material and preparation method thereof with high magnetic permeability
CN111210963A (en) * 2020-02-07 2020-05-29 钢铁研究总院 High-performance yttrium cerium based rare earth permanent magnet and preparation method thereof
CN112034905A (en) * 2020-08-21 2020-12-04 浙江英洛华磁业有限公司 Automatic temperature rise control method for medium-frequency induction smelting of neodymium iron boron melt

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Application publication date: 20170922