WO2021169888A1 - Neodymium-iron-boron magnet material, raw material composition, preparation method therefor and use thereof - Google Patents

Neodymium-iron-boron magnet material, raw material composition, preparation method therefor and use thereof Download PDF

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WO2021169888A1
WO2021169888A1 PCT/CN2021/077173 CN2021077173W WO2021169888A1 WO 2021169888 A1 WO2021169888 A1 WO 2021169888A1 CN 2021077173 W CN2021077173 W CN 2021077173W WO 2021169888 A1 WO2021169888 A1 WO 2021169888A1
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Prior art keywords
grain boundary
percentage
iron boron
neodymium iron
boron magnet
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PCT/CN2021/077173
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French (fr)
Chinese (zh)
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骆溁
黄佳莹
廖宗博
蓝琴
林玉麟
师大伟
谢菊华
龙严清
Original Assignee
厦门钨业股份有限公司
福建省长汀金龙稀土有限公司
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Priority to JP2022547174A priority Critical patent/JP7470805B2/en
Publication of WO2021169888A1 publication Critical patent/WO2021169888A1/en

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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
    • 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
    • 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
    • H01F41/0293—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 diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a neodymium iron boron magnet material, a raw material composition, and a preparation method and application.
  • Nd-Fe-B permanent magnet material is based on Nd 2 Fe l4 B compound, which has the advantages of high magnetic properties, small thermal expansion coefficient, easy processing and low price. Since its introduction, it has grown at an average annual rate of 20-30%. Become the most widely used permanent magnet material. According to the preparation method, Nd-Fe-B permanent magnets can be divided into three types: sintering, bonding and hot pressing. Among them, sintered magnets account for more than 80% of the total output and are the most widely used.
  • Co is widely used in high-tech fields such as neodymium iron boron rare earth permanent magnets, samarium cobalt rare earth permanent magnets, batteries, etc.
  • Co is an important strategic resource and the price is relatively expensive.
  • the invention aims to overcome the technical problem of the prior art neodymium iron boron magnets by adding Co to increase the Curie temperature and coercivity, while Co faces the expensive defect, and provides a neodymium iron boron magnet material and raw material Composition and preparation method and application.
  • the magnet material of the present invention has the advantages of high remanence, high coercivity and good high-temperature performance.
  • the present invention relates to a raw material composition of neodymium iron boron magnet material, which includes the following components by mass content: R: 28-33wt%;
  • R is a rare earth element, including R1 and R2, the R1 is a rare earth element added during smelting, and the R1 includes Nd and Dy; the R2 is a rare earth element added during grain boundary diffusion, and the R2 includes Tb.
  • the content of R2 is 0.2wt% to 1wt%;
  • M ⁇ 0.4wt% and not 0wt%, the type of M includes one or more of Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf and Ag;
  • wt% is the mass percentage of the content of each element in the total mass of the raw material composition
  • the raw material composition does not contain Co.
  • the amount of R in the raw material composition is preferably 29-31 wt%.
  • the content of Nd in the R1 can be conventional in the art, preferably 28-32.5 wt%, and the percentage is a mass percentage of the total mass of the raw material composition.
  • the content of Dy in the R1 is preferably less than 0.2 wt%, for example, 0.1 to 0.2 wt%.
  • the R1 may also include other conventional rare earth elements in the art, for example, including one or more of Pr, Ho, Tb, Gd, and Y.
  • the addition form of Pr is conventional in the art, for example, in the form of PrNd, or in the form of a mixture of pure Pr and Nd, or combined with a mixture of PrNd and pure Pr and Nd Add to.
  • Pr:Nd 25:75 or 20:80;
  • the Pr The content is preferably 0.1 to 2 wt%, such as 0.1 wt%, 0.2 wt%, where the percentage is the mass percentage of the total mass of the raw material composition.
  • the pure Pr or pure Nd in the present invention generally means that the purity is above 99.5%.
  • the content of Ho is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the raw material composition.
  • the content of Gd is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component to the total mass of the raw material composition.
  • the content of Y is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component to the total mass of the raw material composition.
  • the content of R2 is preferably 0.2 wt% to 0.8 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the raw material composition.
  • the content of Tb in the R2 is preferably 0.2 wt% to 0.8 wt%, for example, 0.6 wt%.
  • the R2 may also include one or more of Pr, Dy, Ho and Gd. These rare earth elements can form a shell layer for diffusing rare earth elements through the principle of grain boundary diffusion.
  • the content of Pr is preferably 0.2 wt% or less, and not 0 wt%, such as 0.2 wt%, and wt% is the mass percentage of the element in the raw material composition.
  • the content of Dy is preferably 0.3 wt% or less, and not 0 wt%, for example, 0.3 wt%, and wt% is the mass percentage of the element in the raw material composition.
  • the content of Ho is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the raw material composition.
  • the content of Gd is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the raw material composition.
  • the content of M is preferably 0.1wt% to 0.15wt%, or 0.25wt% to 0.4wt%, such as 0.15wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt% .
  • the type of M is preferably one or more of Ti, Zr, Nb, Ni, V, Ta, Cr, Mo, W, Mn, Hf and Ag.
  • the content of Ti is preferably 0.05 wt% to 0.3 wt%, such as 0.05 wt%, 0.15 wt%, 0.3 wt%, and more preferably 0.1 wt% to 0.15 wt% %.
  • the Nb content is preferably 0.05 wt% to 0.15 wt%, such as 0.05 wt%, 0.15 wt%, and more preferably 0.05 wt% to 0.1 wt%.
  • the type of M preferably further includes one or more of Bi, Sn, Zn, Ga, In, Au and Pb.
  • the content of the Ga is preferably in the range of 0.1 to 0.3 wt%, for example, 0.1 wt%, 0.15 wt%, 0.3 wt%, and wt% means that the element accounts for the amount of the raw material composition.
  • the mass percentage means that the element accounts for the amount of the raw material composition.
  • the M element includes Ga
  • Ga is 0.2wt% or more and not 0.35wt%
  • Ti+Nb in the composition of the M element is 0.07wt% or less and not 0wt%, for example, 0.05wt%
  • Wt% is the mass percentage of the element in the raw material composition. Among them, if Ti+Nb is excessive, the remanence may be reduced.
  • the raw material composition of the present application also contains Al; its content is preferably less than 0.15 wt%, but not 0 wt%, such as 0.15 wt%.
  • Al+Ga+Cu may be 0.15wt% or less and not 0wt%, such as 0.12wt%; preferably, Al+Ga+Cu is 0.11 wt% is less than 0 wt%, such as 0.07 wt%, and wt% is the mass percentage of the element in the raw material composition.
  • the content of Cu is preferably 0.08 wt% or less, but not 0 wt%, or 0.1 wt% to 0.15 wt%, for example, 0.07 wt%, 0.15 wt%.
  • the content of B is preferably 0.9 wt% to 1.1 wt%, more preferably 0.97 wt% to 1.05 wt%.
  • the content of Fe is preferably 65.65wt% to 70.88wt%, for example 67.99wt%, 68.19wt%.
  • the raw material composition includes:
  • R 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
  • the balance is Fe and unavoidable impurities
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%; R2 is Tb, Tb is 0.60wt%;
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes:
  • R 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
  • Nb 0.3wt% or less, but not 0wt%
  • the balance is Fe and unavoidable impurities
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes:
  • R 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
  • Nb 0.3wt% or less, but not 0wt%
  • Ga 0.05wt%-0.3wt%
  • the balance is Fe and unavoidable impurities
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
  • Ga 0.3wt%
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 29wt%; where R1 is Nd and Dy, Nd is 28.6wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.30wt%;
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 31wt%; where R1 is Nd and Dy, Nd is 30.4wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.50wt%;
  • Ga 0.1wt%
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
  • Ga 0.1wt%
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
  • Ga 0.1wt%
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 28wt%; where R1 is Nd and Dy, Nd is 27.3wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.2wt%;
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 33wt%; where R1 is Nd, Dy and Pr, Nd is 31.7wt%, Dy is 0.20wt%, Pr is 0.1wt%, R2 is Tb, and Tb is 1wt%;
  • the percentage is the mass percentage of each element in the raw material composition.
  • the raw material composition includes the following components:
  • R 31wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, Dy and Pr, where Tb is 0.5wt%, Dy is 0.30wt%, and Pr is 0.20wt% ;
  • the percentage is the mass percentage of each element in the raw material composition.
  • the present invention also provides a preparation method of neodymium iron boron magnet material, which adopts the raw material composition as described above.
  • the preparation method is a conventional diffusion method in the art, wherein the R1 element is added in the smelting step, The R2 element is added in the grain boundary diffusion step.
  • the preparation method preferably includes the following steps: the elements other than R2 in the raw material composition of the neodymium iron boron magnet material are smelted, powdered, molded, and sintered to obtain a sintered body, and then the The mixture of the sintered body and the R2 may diffuse through the grain boundary.
  • the smelting operation and conditions can be conventional smelting processes in the field.
  • the elements other than R2 in the neodymium iron boron magnet material are smelted and casted by ingot casting process and quick-setting sheet process to obtain alloy flakes.
  • an additional 0-0.3wt% rare earth element ( Generally Nd element), the percentage is the mass percentage of the content of the additional rare earth element to the total content of the raw material composition; in addition, the content of this part of the additional rare earth element is not included in the scope of the raw material composition.
  • the temperature of the smelting may be 1300 to 1700°C, preferably 1450 to 1550°C, such as 1500°C.
  • the smelting equipment is generally a high-frequency vacuum melting furnace and/or an intermediate frequency vacuum melting furnace, such as an intermediate frequency vacuum induction rapid-setting belt spinning furnace.
  • the operation and conditions of the pulverizing can be conventional pulverizing processes in the field, and generally include hydrogen crushing pulverizing and/or jet milling pulverizing.
  • the hydrogen crushing and pulverizing generally includes hydrogen absorption, dehydrogenation and cooling treatment.
  • the temperature of the hydrogen absorption is generally 20 to 200°C.
  • the temperature of the dehydrogenation is generally 400-650°C, preferably 500-550°C.
  • the pressure of the hydrogen absorption is generally 50 to 600 kPa, such as 90 kPa.
  • the air-jet milling powder is generally carried out under the conditions of 0.1-2 MPa, preferably 0.5-0.7 MPa.
  • the gas stream in the gas stream milling powder can be, for example, nitrogen gas.
  • the time for the air jet milling can be 2 to 4 hours.
  • the molding operation and conditions can be conventional molding processes in the field.
  • the magnetic field forming method for example, the magnetic field forming method.
  • the magnetic field strength of the magnetic field forming method is generally above 1.5T.
  • the sintering operation and conditions can be conventional sintering processes in the field.
  • the sintering can be performed under the condition of a vacuum degree of less than 5 ⁇ 10 -1 Pa.
  • the sintering temperature may be 1000-1200°C, for example 1030-1090°C.
  • the sintering time may be 0.5-10h, for example 2-5h.
  • the R2 is generally coated in the form of fluoride or a low melting point alloy, such as fluoride of Tb.
  • Dy is also contained, it is preferable that Dy is coated in the form of fluoride of Dy.
  • Pr is also included, it is preferable to add Pr in the form of a PrCu alloy.
  • the timing of Cu addition in the preparation method is the grain boundary diffusion step, or the smelting step and the grain boundary diffusion step are added at the same time
  • the content of Cu is preferably 0.03 to 0.15 wt%
  • wt% is the mass percentage of the element in the raw material composition; wherein the Cu accounts for the PrCu The percentage is 0.1-17wt%.
  • the operation and conditions of the grain boundary diffusion treatment can be a conventional grain boundary diffusion process in the art.
  • the temperature of the grain boundary diffusion may be 800-1000°C, for example 850°C.
  • the time for the grain boundary diffusion may be 5-20h, for example 5-15h.
  • low-temperature tempering treatment is also performed according to the conventional practice in the art.
  • the temperature of low temperature tempering treatment is generally 460-560°C, and the time is generally 1-3h.
  • the invention also provides a neodymium iron boron magnet material prepared by the above preparation method.
  • the present invention also provides a neodymium iron boron magnet material, R: 28-33wt%; said R includes R1 and R2, said R1 includes Nd and Dy, said R2 includes Tb, and the content of R2 is 0.2wt% ⁇ 1wt%;
  • M 0.35wt% or less and not 0wt%
  • M includes one or more of Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn and Ag;
  • wt% is the mass percentage of each element in the neodymium iron boron magnet material
  • the neodymium iron boron magnet material does not contain Co;
  • the neodymium iron boron magnet material comprises Nd 2 Fe l4 B crystal grains and its shell layer, two grain boundaries adjacent to the Nd 2 Fe l4 B crystal grains and a grain boundary triangle region, wherein the heavy rare earth elements in R1 are mainly distributed In the Nd 2 Fe 14 B crystal grains, R2 is mainly distributed in the shell layer, the two-grain boundary and the grain boundary triangle area, and the area of the grain boundary triangle area accounts for 1.5% to 3.5%;
  • the continuity of the grain boundary of the neodymium iron boron magnet material is more than 96%; the mass ratio of C and O in the triangular area of the grain boundary is 0.4-0.5%, and the mass ratio of C and O in the two-grain grain boundary is more than 0.35% .
  • the heavy rare earth elements in R1 are mainly distributed in Nd 2 Fe l4 B crystal grains
  • the main distribution of heavy rare earth elements in R1 caused by the conventional smelting and sintering process in this field generally refers to more than 95%
  • a small amount is distributed in the grain boundaries.
  • R2 is mainly distributed in the shell layer, the two-particle grain boundary and the grain boundary triangle area
  • the main distribution of R2 (generally more than 95%) caused by the conventional grain boundary diffusion process in the field
  • a small part of the shell layer of the main phase crystal grains, the two-grain grain boundary and the grain boundary triangle region will also diffuse into the main phase crystal grains, for example, at the outer edges of the main phase crystal grains.
  • the calculation method of grain boundary continuity refers to the length occupied by phases other than voids in the grain boundary (such as B-rich phase, rare earth-rich phase, rare earth oxide, rare earth carbide, etc.) and the total grain boundary length ratio. Grain boundary continuity of more than 96% can be called continuous channel.
  • the grain boundary triangle area generally refers to a place where three or more grain boundary phases intersect, and there are B-rich phases, rare earth-rich phases, rare earth oxides, rare earth carbides, and cavities distributed.
  • the calculation method of the area ratio of the grain boundary triangle area refers to the ratio of the area of the grain boundary triangle area to the total area (grain + grain boundary).
  • the C and O elements in rare earth oxides and rare earth carbides are introduced in conventional ways in the art, generally impurity introduction or atmosphere introduction. Specifically, for example, during jet milling and pressing, additives are introduced, and during sintering , These additives will be removed by heating, but a small amount of C and O elements will inevitably remain; for another example, a small amount of O elements will inevitably be introduced due to the atmosphere in the preparation process.
  • the content of C and O in the final NdFeB magnet material product obtained after testing are only below 1000 ppm and 1200 ppm respectively, which belong to the category of conventional acceptable impurities in the field, so they are not included in the product element statistical table.
  • Tb diffuses through the grain boundary to form a covering layer to improve the coercivity;
  • Dy can reduce the amount of ⁇ -Fe produced during smelting, which is beneficial to the improvement of the magnetic properties of the product.
  • C and O elements usually exist in the form of rare earth carbides and rare earth oxides in the grain boundary phase, so "the mass ratio of C and O in the grain boundary triangle area" and " The mass ratios of C and O in the grain boundaries of the two grains correspond to heterogeneous rare earth carbides and rare earth oxides, respectively.
  • the percentage of “the mass ratio of C and O in the two-grain boundary (%)" is the ratio of the mass of C and O in the two-grain boundary to the total mass of all elements in the grain boundary", "the triangle area of the grain boundary”
  • the percentage in the “mass ratio of C and O” refers to the ratio of the mass of C and O in the triangular area of the grain boundary to the total mass of all elements in the grain boundary.
  • the area of the grain boundary triangle area is preferably 1.59% to 3.28%, such as 1.59%, 1.88%, 2.34%, 2.36%, 2.38%, 2.45%, 2.54%, 2.62%, 2.68%, 3.28%, more preferably 1.59% to 2%.
  • the grain boundary continuity is preferably 97% or more, for example, 97.01%, 97.20%, 98.50%, 98.00%, 98.10%, 98.22%, 98.41%, 98.36%, 98.80%, 99.50%, more Preferably, it is above 98%.
  • the mass of C and O in the two-grain boundary is preferably 0.37% to 0.4%.
  • a new phase is also detected at the two-grain boundary, and its chemical composition is R x Fe 100 -xyz Cu y M z ; where R includes one or more of Nd, Dy and Tb, and M includes Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn and Ag X is 32-36, y is 0.1 or less, but not 0, z is 0.15 or less, but not 0; wherein, x is preferably 32.5 to 35.5, and y is preferably 0.02 to 0.1, z is preferably 0.07 to 0.12.
  • the structure of the new phase is, for example, R 34.5 Fe 65.4 Cu 0.03 M 0.07 , R 34.1 Fe 65.68 Cu 0.1 M 0.12 , R 33.2 Fe 66.68 Cu 0.04 M 0.08 , R 33.56 Fe 66.28 Cu 0.05 M 0.11 , R 34.41 Fe 65.42 Cu 0.08 M 0.09 , R 35.26 Fe 64.58 Cu 0.07 M 0.09 , R 35.50 Fe 64.38 Cu 0.04 M 0.08 , R 32.50 Fe 67.39 Cu 0.03 M 0.08 , R 33.33 Fe 66.58 Cu 0.02 M 0.07 , R 34.22 Fe 65.64 Cu 0.06 M 0.08 .
  • the area of the new phase of the chemical composition of R x Fe 100-xyz Cu y M z in the two-grain boundary and the total area of the two-grain boundary is preferably 0.8-3 %, more preferably 0.81 to 2.64%.
  • the inventor speculates that the new phase is formed at the grain boundary of the two particles, so the continuity of the grain boundary is further improved, thereby improving the performance of the magnet.
  • the amount of R in the neodymium iron boron magnet material is preferably 29-31 wt%.
  • the content of Nd in the R can be conventional in the art, preferably 28-32.5 wt%, and the percentage is the mass of the total mass of the neodymium iron boron magnet material percentage.
  • the content of Dy in the R1 is preferably less than 0.2 wt%, for example, 0.1 to 0.2 wt%.
  • the R1 may also include other conventional rare earth elements in the art, for example, including one or more of Pr, Ho, Tb, Gd, and Y.
  • the addition form of Pr is conventional in the art, for example, in the form of PrNd, or in the form of a mixture of pure Pr and Nd, or combined with a mixture of PrNd and pure Pr and Nd Add to.
  • Pr:Nd 25:75 or 20:80;
  • the Pr The content is preferably 0.1 to 2 wt%, such as 0.1 wt%, 0.2 wt%, where the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
  • the content of Ho is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
  • the content of Gd is preferably 0.1 to 0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
  • the content of Y is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
  • the content of R2 is preferably 0.2 wt% to 0.8 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
  • the content of Tb in the R2 is preferably 0.2 wt% to 0.8 wt%, for example, 0.6 wt%.
  • the R2 may also include one or more of Pr, Dy, Ho and Gd. These rare earth elements can form a shell layer for diffusing rare earth elements through the principle of grain boundary diffusion.
  • the content of Pr is preferably 0.2wt% or less, and not 0wt%, for example 0.2wt%, and wt% is the mass of the element in the neodymium iron boron magnet material percentage.
  • the content of Dy is preferably 0.3 wt% or less, and not 0 wt%, such as 0.3 wt%, and wt% is the mass percentage of the element in the neodymium iron boron magnet material .
  • the content of Ho is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the neodymium iron boron magnet material.
  • the content of the Gd is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the neodymium iron boron magnet material.
  • the content of M is preferably 0.1wt% to 0.15wt%, or 0.25wt% to 0.4wt%, such as 0.15wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt% .
  • the type of M is preferably one or more of Ti, Zr, Nb, Ni, V, Ta, Cr, Mo, W, Mn, Hf and Ag.
  • the content of Ti is preferably 0.05 wt% to 0.3 wt%, such as 0.05 wt%, 0.15 wt%, 0.3 wt%, and more preferably 0.1 wt% to 0.15 wt% %.
  • the Nb content is preferably 0.05 wt% to 0.15 wt%, such as 0.05 wt%, 0.15 wt%, and more preferably 0.05 wt% to 0.1 wt%.
  • the type of M preferably further includes one or more of Bi, Sn, Zn, Ga, In, Au and Pb.
  • the content of Ga is preferably in the range of 0.1 to 0.3 wt%, for example, 0.1 wt%, 0.15 wt%, or 0.3 wt%.
  • the M element includes Ga
  • Ga is 0.2wt% or more and not 0.35wt%
  • Ti+Nb in the composition of the M element is 0.07wt% or less and not 0wt%, for example, 0.05wt% .
  • Ti+Nb is excessive, the remanence may be reduced.
  • the neodymium iron boron magnet material also contains Al; its content is preferably less than 0.15 wt%, but not 0 wt%, such as 0.15 wt%.
  • Al+Ga+Cu may be 0.15wt% or less and not 0wt%, such as 0.12wt%; preferably, Al+Ga+Cu is 0.11 wt% or less, and not 0 wt%, for example, 0.07 wt%.
  • the content of Cu is preferably 0.08 wt% or less, but not 0 wt%, or 0.1 wt% to 0.15 wt%, such as 0.07 wt%, 0.15 wt%.
  • the content of B is preferably 0.9 wt% to 1.1 wt%, more preferably 0.97 wt% to 1.05 wt%.
  • the content of Fe is preferably 65.65wt% to 70.88wt%, for example 67.99wt%, 68.19wt%.
  • the neodymium iron boron magnet material includes:
  • R 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
  • the balance is Fe and unavoidable impurities
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material.
  • the neodymium iron boron magnet material includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%; R2 is Tb, Tb is 0.60wt%;
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the triangular area of the grain boundary accounts for 2.34%; the continuity of the grain boundary of the NdFeB magnet material is 98%; the mass ratio of C and O in the triangular area of the grain boundary is 0.45%.
  • the mass ratio of C and O is 0.39%; the new phase R 34.5 Fe 65.4 Cu 0.03 M 0.07 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 2.35%.
  • the neodymium iron boron magnet material includes:
  • R 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
  • Nb 0.3wt% or less, but not 0wt%
  • the balance is Fe and unavoidable impurities
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material.
  • the neodymium iron boron magnet material includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the grain boundary triangle area accounts for 2.36%; the grain boundary continuity of the neodymium iron boron magnet material is 98.41%; the mass ratio of C and O in the grain boundary triangle area is 0.41%.
  • the mass ratio of C and O is 0.38%; a new phase R 35.26 Fe 64.58 Cu 0.07 M 0.09 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 1.12%.
  • the neodymium iron boron magnet material includes:
  • R 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
  • Nb 0.3wt% or less, but not 0wt%
  • Ga 0.05wt%-0.3wt%
  • the balance is Fe and unavoidable impurities
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material.
  • the neodymium iron boron magnet material includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
  • Ga 0.3wt%
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the grain boundary triangle area accounts for 2.45%; the grain boundary continuity of the neodymium iron boron magnet material is 98.80%; the mass ratio of C and O in the grain boundary triangle area is 0.45%.
  • the mass ratio of C and O is 0.39%, the new phase R 35.50 Fe 64.38 Cu 0.04 M 0.08 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 2.03%.
  • the neodymium iron boron magnet material includes the following components:
  • R 29wt%; where R1 is Nd and Dy, Nd is 28.6wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.30wt%;
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the grain boundary triangle area accounts for 1.88%; the grain boundary continuity of the neodymium iron boron magnet material is 97.20%; the mass ratio of C and O in the grain boundary triangle area is 0.44%. The mass ratio of C and O is 0.38%.
  • a new phase R 34.1 Fe 65.68 Cu 0.1 M 0.12 is detected in the two-grain boundary.
  • the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 1.74%.
  • the neodymium iron boron magnet material includes the following components:
  • R 31wt%; where R1 is Nd and Dy, Nd is 30.4wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.50wt%;
  • Ga 0.1wt%
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the triangular area of the grain boundary accounts for 2.68%; the continuity of the grain boundary of the NdFeB magnet material is 98.36%; the mass ratio of C and O in the triangular area of the grain boundary is 0.45%. The mass ratio of C and O is 0.39%.
  • a new phase R 33.2 Fe 66.68 Cu 0.04 M 0.08 is detected in the two-grain boundary.
  • the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 1.94%.
  • the neodymium iron boron magnet material includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
  • Ga 0.1wt%
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the grain boundary triangle area accounts for 2.38%; the grain boundary continuity of the neodymium iron boron magnet material is 98.10%; the mass ratio of C and O in the grain boundary triangle area is 0.44%. The mass ratio of C and O is 0.4%.
  • the new phase R 33.56 Fe 66.28 Cu 0.05 M 0.11 is detected in the two-grain boundary.
  • the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 0.81%.
  • the neodymium iron boron magnet material includes the following components:
  • R 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
  • Ga 0.1wt%
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the grain boundary triangle area accounts for 2.54%; the grain boundary continuity of the neodymium iron boron magnet material is 98.22%; the mass ratio of C and O in the grain boundary triangle area is 0.43%.
  • the mass ratio of C and O is 0.4%, the new phase R 34.41 Fe 65.42 Cu 0.08 M 0.09 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 2.64%.
  • the neodymium iron boron magnet material includes the following components:
  • R 28wt%; where R1 is Nd and Dy, Nd is 27.3wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.2wt%;
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the grain boundary triangle area accounts for 1.59%; the grain boundary continuity of the neodymium iron boron magnet material is 97.01%; the mass ratio of C and O in the grain boundary triangle area of the three grain boundaries is 0.46%, and the two particles The mass ratio of C and O in the grain boundary is 0.38%.
  • a new phase R 32.50 Fe 67.39 Cu 0.03 M 0.08 is detected in the two grain boundaries.
  • the ratio of the total area of the grain boundaries of the particles is 1.06%.
  • the neodymium iron boron magnet material includes the following components:
  • R 33wt%; where R1 is Nd, Dy and Pr, Nd is 31.7wt%, Dy is 0.20wt%, Pr is 0.1wt%, R2 is Tb, and Tb is 1wt%;
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the triangular area of the grain boundary accounts for 3.28%; the continuity of the grain boundary of the neodymium iron boron magnet material is 99.50%; the mass ratio of C and O in the triangular area of the grain boundary is 0.46%. The mass ratio of C and O is 0.37%.
  • a new phase R 33.33 Fe 66.58 Cu 0.02 M 0.07 is detected in the two-grain boundary.
  • the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 1.58%.
  • the neodymium iron boron magnet material includes the following components:
  • R 31wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, Dy and Pr, where Tb is 0.5wt%, Dy is 0.30wt%, and Pr is 0.20wt% ;
  • the percentage is the mass percentage of each element in the neodymium iron boron magnet material
  • the area of the triangular area of the grain boundary accounts for 2.62%; the continuity of the grain boundary of the NdFeB magnet material is 98.50%; the mass ratio of C and O in the triangular area of the grain boundary is 0.48%. The mass ratio of C and O is 0.39%.
  • the new phase R 34.22 Fe 65.64 Cu 0.06 M 0.08 is detected in the two-grain boundary.
  • the area of the new phase in the two-grain boundary is the same as the two-grain boundary
  • the ratio of the total area is 1.87%.
  • the neodymium iron boron magnet material provided by the present invention adopts a Co-free solution, while reasonably controlling the total rare earth content TRE and the content range of Cu and M (Ti, Nb, etc.) elements, the miscellaneous phases are more distributed in the grain boundary of the two particles, and It is not agglomerated in the grain boundary triangle area, so that the continuity of the grain boundary is improved, and the area of the grain boundary triangle area is reduced, which is beneficial to obtain a higher density, thereby increasing the magnet remanence Br; this also promotes the uniform distribution of Tb elements In the grain boundary and the main phase shell, the coercive force Hcj of the magnet is increased.
  • the invention also provides an application of the neodymium iron boron magnet material described above in the preparation of magnetic steel.
  • the magnetic steel is preferably 54SH, 54UH, 56SH high-performance magnetic steel.
  • the reagents and raw materials used in the present invention are all commercially available.
  • the magnet material of the present invention has excellent magnet performance, wherein Br ⁇ 14.5kGs, Hcj ⁇ 24.5kOe; 20-120°CBr temperature coefficient ⁇ -0.106%/°C;
  • the magnet material of the present invention can be used in the manufacture of 54SH, 54UH, and 56SH high-performance magnetic steels. Since it does not contain Co, the production cost is reduced.
  • FIG. 1 is an EPMA photomicrograph of the neodymium iron boron magnet material prepared in Example 1.
  • FIG. 1 is an EPMA photomicrograph of the neodymium iron boron magnet material prepared in Example 1.
  • Example 2 is the EPMA spectrum of the neodymium iron boron magnet material prepared in Example 1.
  • the equipment used for the magnetic performance evaluation is the PFM-14 magnetic performance measuring instrument manufactured by Hirst, UK.
  • Table 1 The formula and content of the raw material composition of the neodymium iron boron magnet material (wt%)
  • Airflow milling process Under nitrogen atmosphere, the powder after hydrogen pulverization is pulverized by airflow milling for 3 hours under the condition of 0.6 MPa in the pulverizing chamber to obtain fine powder.
  • each molded body is moved to a sintering furnace for sintering, sintered under a vacuum of less than 0.5 Pa, and sintered at 1030-1090°C for 2-5 hours to obtain a sintered body.
  • Each component of the neodymium iron boron magnet material is measured using a high-frequency inductively coupled plasma emission spectrometer (ICP-OES). Table 2 below shows the component test results.
  • the continuity of the two-grain boundary is calculated based on EPMA's backscattering picture; the mass proportion of C and O in the two-grain boundary and the triangular area of the grain boundary and the new phase are measured by the elemental analysis of EPMA.
  • the area ratio of the grain boundary triangle area refers to the ratio of the area of the grain boundary triangle area to the total area of "grains and grain boundaries".
  • the continuity of the two-grain grain boundary refers to the length occupied by the phases other than voids in the grain boundary (phases such as B-rich phase, rare earth-rich phase, rare earth oxide, rare earth carbide, etc.) and the total grain boundary length Ratio.
  • the mass ratio of C and O in the grain boundary triangle refers to the ratio of the mass of C and O in the grain boundary triangle to the total mass of all elements in the grain boundary.
  • the mass ratio of C and O in the two-grain grain boundary refers to the ratio of the mass of C and O in the triangular area of the grain boundary to the total mass of all elements in the grain boundary.
  • the area ratio (%) of the new phase in the two-grain boundary refers to the ratio of the area of the new phase in the two-grain boundary to the total area of the two-grain boundary.
  • Fig. 1 it is a scanning photograph of the microstructure of the NdFeB magnet prepared in Example 1.
  • the black block structure is the detachment of the Nd-rich phase caused by grinding and polishing when the sample is prepared for scanning electron microscope observation. , Making black holes appear in the picture.
  • point 3 is the main phase of Nd 2 Fe 14 B (gray area)
  • point 2 is the grain boundary phase (silver-white area)
  • point 1 is the R x Fe 100-xyz Cu y M z phase included in the two-grain boundary (Off-white mass).
  • the results show that the area of the triangular area of the grain boundary is smaller than that of the conventional magnet.
  • the EPMA spectrum of Figure 2 shows that "Tb elements are uniformly distributed in the grain boundaries and the main phase shell.”

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Abstract

Provided in the present invention are a neodymium-iron-boron magnet material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition comprises: R: 28-33 wt%, R comprising R1 and R2, R1 being a rare earth element added during smelting, R1 comprising Nd and Dy, R2 being a rare earth element added during grain boundary diffusion, R2 comprising Tb, and the content of R2 being 0.2 wt% - 1 wt%; M: ≤ 0.4 wt% and not 0 wt%, M being one or more elements from among Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, and Ag; Cu: ≤ 0.15 wt% and not 0 wt%; B: 0.9-1.1 wt%; Fe: 60 wt% - 70.88 wt%. The raw material composition does not contain Co. The magnet material of the present invention features the advantages of high remanence, high coercivity, and excellent high-temperature performance.

Description

钕铁硼磁体材料、原料组合物及制备方法和应用Neodymium iron boron magnet material, raw material composition, preparation method and application 技术领域Technical field
本发明涉及一种钕铁硼磁体材料、原料组合物及制备方法和应用。The invention relates to a neodymium iron boron magnet material, a raw material composition, and a preparation method and application.
背景技术Background technique
Nd-Fe-B永磁材料以Nd 2Fe l4B化合物为基体，具有磁性能高、热膨胀系数小、易加工和价格低等优点，自问世以来，以平均每年20-30％的速度增长，成为应用最广泛的永磁材料。按制备方法，Nd-Fe-B永磁体可分为烧结、粘结和热压三种，其中烧结磁体占总产量的80％以上，应用最广泛。 Nd-Fe-B permanent magnet material is based on Nd 2 Fe l4 B compound, which has the advantages of high magnetic properties, small thermal expansion coefficient, easy processing and low price. Since its introduction, it has grown at an average annual rate of 20-30%. Become the most widely used permanent magnet material. According to the preparation method, Nd-Fe-B permanent magnets can be divided into three types: sintering, bonding and hot pressing. Among them, sintered magnets account for more than 80% of the total output and are the most widely used.
随着制备工艺和磁体成分的不断优化，烧结Nd-Fe-B磁体的最大磁能积已接近理论值。随着近年来风力发电、混合动力汽车和变频空调等新兴行业的蓬勃发展对高性能Nd-Fe-B磁体的需求越来越大，同时，这些高温领域的应用也对烧结Nd-Fe-B磁体的性能尤其是矫顽力提出了更高的要求。With the continuous optimization of the preparation process and magnet composition, the maximum energy product of sintered Nd-Fe-B magnets has approached the theoretical value. With the vigorous development of emerging industries such as wind power generation, hybrid electric vehicles and inverter air conditioners in recent years, the demand for high-performance Nd-Fe-B magnets has increased. The performance of the magnet, especially the coercivity, puts forward higher requirements.
美国专利申请US5645651A通过图1表明，Nd-Fe-B磁体的居里温度会随着Co含量的提高而提升，另外表1通过样品9和样品2的对比表明，Nd-Fe-B磁体中添加20at％的Co，相比不加Co的方案，在维持剩磁基本不变的情况下，能提高矫顽力。The United States patent application US5645651A shows through Figure 1 that the Curie temperature of the Nd-Fe-B magnet will increase with the increase of the Co content. In addition, the comparison of sample 9 and sample 2 in Table 1 shows that the Nd-Fe-B magnet is added Compared with the solution without Co, 20at% Co can increase the coercivity while maintaining the remanence basically unchanged.
因此Co被广泛应用于钕铁硼稀土永磁、钐钴稀土永磁、电池等高科技领域，但Co又是重要战略资源，价格较为昂贵。Therefore, Co is widely used in high-tech fields such as neodymium iron boron rare earth permanent magnets, samarium cobalt rare earth permanent magnets, batteries, etc. However, Co is an important strategic resource and the price is relatively expensive.
发明内容Summary of the invention
本发明旨在克服现有技术的钕铁硼磁体通过添加Co来提高居里温度和矫顽力、而Co又面临价格昂贵的缺陷的技术问题，而提供了一种钕铁硼磁体材料、原料组合物及制备方法和应用。本发明的磁体材料具有高剩磁、高矫顽力以及高温性能好的优势。The invention aims to overcome the technical problem of the prior art neodymium iron boron magnets by adding Co to increase the Curie temperature and coercivity, while Co faces the expensive defect, and provides a neodymium iron boron magnet material and raw material Composition and preparation method and application. The magnet material of the present invention has the advantages of high remanence, high coercivity and good high-temperature performance.
本发明涉及一种钕铁硼磁体材料的原料组合物，其包括如下质量含量的组分：R：28～33wt％；The present invention relates to a raw material composition of neodymium iron boron magnet material, which includes the following components by mass content: R: 28-33wt%;
R为稀土元素，包括R1和R2，所述R1为熔炼时添加的稀土元素，所述R1包括Nd和Dy；所述R2为晶界扩散时添加的稀土元素，所述R2包括Tb，所述R2的含量为0.2wt％～1wt％；R is a rare earth element, including R1 and R2, the R1 is a rare earth element added during smelting, and the R1 includes Nd and Dy; the R2 is a rare earth element added during grain boundary diffusion, and the R2 includes Tb. The content of R2 is 0.2wt% to 1wt%;
M：≤0.4wt％、且不为0wt％，所述M的种类包括Ti、Ni、V、Nb、Ta、Cr、Mo、W、Mn、Zr、Hf和Ag中的一种或多种；M: ≤0.4wt% and not 0wt%, the type of M includes one or more of Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf and Ag;
Cu：≤0.15wt％、且不为0wt％；Cu: ≤0.15wt%, and not 0wt%;
B：0.9～1.1wt％；B: 0.9～1.1wt%;
Fe：60wt％～70.88wt％；Fe: 60wt%～70.88wt%;
wt％为各元素含量占所述原料组合物的总质量的质量百分比；wt% is the mass percentage of the content of each element in the total mass of the raw material composition;
所述原料组合物中不含有Co。The raw material composition does not contain Co.
本发明中，所述原料组合物中R的用量较佳地为29-31wt％。In the present invention, the amount of R in the raw material composition is preferably 29-31 wt%.
本发明中，所述原料组合物中，所述R1中Nd的含量可为本领域常规，较佳地为28～32.5wt％，百分比为占所述原料组合物总质量的质量百分比。In the present invention, in the raw material composition, the content of Nd in the R1 can be conventional in the art, preferably 28-32.5 wt%, and the percentage is a mass percentage of the total mass of the raw material composition.
本发明中，所述原料组合物中，所述R1中Dy的含量较佳地在0.2wt％以下，例如0.1～0.2wt％。In the present invention, in the raw material composition, the content of Dy in the R1 is preferably less than 0.2 wt%, for example, 0.1 to 0.2 wt%.
本发明中，所述R1还可包括本领域其他常规的稀土元素，例如包括Pr、Ho、Tb、Gd和Y中的一种或多种。In the present invention, the R1 may also include other conventional rare earth elements in the art, for example, including one or more of Pr, Ho, Tb, Gd, and Y.
其中，当所述R1包含Pr时，Pr的添加形式为本领域常规，例如以PrNd的形式，或者，以纯净的Pr和Nd的混合物的形式，或者以PrNd、纯净的Pr和Nd的混合物联合添加。当以PrNd的形式添加时，Pr：Nd＝25:75或20：80；当以纯净的Pr和Nd的混合物的形式或以PrNd、纯净的Pr和Nd的混合物联合添加时，所述Pr的含量较佳地为0.1～2wt％，例如0.1wt％，0.2wt％，其中百分比为占所述原料组合物总质量的质量百分比。本发明中所述纯Pr或纯Nd一般指的是纯度在99.5％以上。Wherein, when the R1 contains Pr, the addition form of Pr is conventional in the art, for example, in the form of PrNd, or in the form of a mixture of pure Pr and Nd, or combined with a mixture of PrNd and pure Pr and Nd Add to. When added in the form of PrNd, Pr:Nd=25:75 or 20:80; when added in the form of a mixture of pure Pr and Nd or a combination of PrNd, pure Pr and Nd, the Pr The content is preferably 0.1 to 2 wt%, such as 0.1 wt%, 0.2 wt%, where the percentage is the mass percentage of the total mass of the raw material composition. The pure Pr or pure Nd in the present invention generally means that the purity is above 99.5%.
其中，当所述的R1包含Ho时，所述Ho的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述原料组合物总质量的质量百分比。Wherein, when the R1 includes Ho, the content of Ho is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the raw material composition.
其中，当所述的R1包含Gd时，所述Gd的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述原料组合物总质量的质量百分比。Wherein, when the R1 includes Gd, the content of Gd is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component to the total mass of the raw material composition.
其中，当所述的R1包含Y时，所述Y的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述原料组合物总质量的质量百分比。Wherein, when the R1 includes Y, the content of Y is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component to the total mass of the raw material composition.
本发明中，所述R2的含量较佳地为0.2wt％～0.8wt％，百分比为各组分含量占所述原料组合物总质量的质量百分比。In the present invention, the content of R2 is preferably 0.2 wt% to 0.8 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the raw material composition.
本发明中，所述R2中，Tb的含量较佳地为0.2wt％～0.8wt％，例如0.6wt％。In the present invention, the content of Tb in the R2 is preferably 0.2 wt% to 0.8 wt%, for example, 0.6 wt%.
本发明中，所述R2还可包括Pr、Dy、Ho和Gd中的一种或多种。这些稀土元素都可以通过晶界扩散原理，形成扩散稀土元素的壳层。In the present invention, the R2 may also include one or more of Pr, Dy, Ho and Gd. These rare earth elements can form a shell layer for diffusing rare earth elements through the principle of grain boundary diffusion.
其中，当所述的R2包含Pr时，所述Pr的含量较佳地为0.2wt％以下，且不为0wt％，例如0.2wt％，wt％为元素占所述原料组合物的质量百分比。Wherein, when the R2 contains Pr, the content of Pr is preferably 0.2 wt% or less, and not 0 wt%, such as 0.2 wt%, and wt% is the mass percentage of the element in the raw material composition.
其中，当所述R2包含Dy时，所述Dy的含量较佳地为0.3wt％以下，且不为0wt％，例如0.3wt％，wt％为元素占所述原料组合物的质量百分比。Wherein, when the R2 includes Dy, the content of Dy is preferably 0.3 wt% or less, and not 0 wt%, for example, 0.3 wt%, and wt% is the mass percentage of the element in the raw material composition.
其中，当所述R2包括Ho时，所述Ho的含量较佳地为0.15wt％以下、且不为0wt％，wt％为元素占所述原料组合物的质量百分比。Wherein, when the R2 includes Ho, the content of Ho is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the raw material composition.
其中，当所述R2包括Gd时，所述Gd的含量较佳地为0.15wt％以下、且不为0wt％，wt％为元素占所述原料组合物的质量百分比。Wherein, when the R2 includes Gd, the content of Gd is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the raw material composition.
本发明中，所述M的含量较佳地为0.1wt％～0.15wt％，或者0.25wt％～0.4wt％，例如0.15wt％，0.25wt％，0.3wt％，0.35wt％，0.4wt％。In the present invention, the content of M is preferably 0.1wt% to 0.15wt%, or 0.25wt% to 0.4wt%, such as 0.15wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt% .
本发明，所述M的种类较佳地为Ti、Zr、Nb、Ni、V、Ta、Cr、Mo、W、Mn、Hf和Ag中的一种或多种。In the present invention, the type of M is preferably one or more of Ti, Zr, Nb, Ni, V, Ta, Cr, Mo, W, Mn, Hf and Ag.
其中，当所述M包含Ti时，所述Ti的含量较佳地为0.05wt％～0.3wt％，例如0.05wt％，0.15wt％，0.3wt％，更佳地为0.1wt％～0.15wt％。Wherein, when the M contains Ti, the content of Ti is preferably 0.05 wt% to 0.3 wt%, such as 0.05 wt%, 0.15 wt%, 0.3 wt%, and more preferably 0.1 wt% to 0.15 wt% %.
其中，当所述的M包含Nb时，所述Nb的含量较佳地为0.05wt％～0.15wt％，例如0.05wt％，0.15wt％，更佳地为0.05wt％～0.1wt％。Wherein, when the M contains Nb, the Nb content is preferably 0.05 wt% to 0.15 wt%, such as 0.05 wt%, 0.15 wt%, and more preferably 0.05 wt% to 0.1 wt%.
其中，所述M的种类较佳地还包括Bi、Sn、Zn、Ga、In、Au和Pb中的一种或多种。Wherein, the type of M preferably further includes one or more of Bi, Sn, Zn, Ga, In, Au and Pb.
其中，当所述M包括Ga时，所述Ga的含量范围较佳地为0.1～0.3wt％，例如0.1wt％，0.15wt％，0.3wt％，wt％为元素占所述原料组合物的质量百分比。Wherein, when the M includes Ga, the content of the Ga is preferably in the range of 0.1 to 0.3 wt%, for example, 0.1 wt%, 0.15 wt%, 0.3 wt%, and wt% means that the element accounts for the amount of the raw material composition. The mass percentage.
当M元素包括Ga，且Ga为0.2wt％以上、且不为0.35wt％时，较佳地，M元素的组成中Ti+Nb为0.07wt％以下、且不为0wt％，例如0.05wt％，wt％为元素占所述原料组合物的质量百分比。其中，Ti+Nb过量的话，可能会降低剩磁。When the M element includes Ga, and Ga is 0.2wt% or more and not 0.35wt%, preferably, Ti+Nb in the composition of the M element is 0.07wt% or less and not 0wt%, for example, 0.05wt% , Wt% is the mass percentage of the element in the raw material composition. Among them, if Ti+Nb is excessive, the remanence may be reduced.
本发明中，较佳地，本申请的原料组合物中还含有Al；其含量较佳地为0.15wt％以下，但不为0wt％，例如0.15wt％。In the present invention, preferably, the raw material composition of the present application also contains Al; its content is preferably less than 0.15 wt%, but not 0 wt%, such as 0.15 wt%.
当所述M包括Ga，且Ga为0.01wt％以下时，Al+Ga+Cu可为0.15wt％以下、且不为0wt％，例如0.12wt％；较佳地，Al+Ga+Cu为0.11wt％以下、且不为0wt％，例如0.07wt％，wt％为元素占所述原料组合物的质量百分比。When the M includes Ga and Ga is 0.01wt% or less, Al+Ga+Cu may be 0.15wt% or less and not 0wt%, such as 0.12wt%; preferably, Al+Ga+Cu is 0.11 wt% is less than 0 wt%, such as 0.07 wt%, and wt% is the mass percentage of the element in the raw material composition.
本发明中，Cu的含量较佳地为0.08wt％以下、但不为0wt％，或者0.1wt％～0.15wt％，例如0.07wt％，0.15wt％。In the present invention, the content of Cu is preferably 0.08 wt% or less, but not 0 wt%, or 0.1 wt% to 0.15 wt%, for example, 0.07 wt%, 0.15 wt%.
本发明中，B的含量较佳地为0.9wt％～1.1wt％，更佳地为0.97wt％～1.05wt％。In the present invention, the content of B is preferably 0.9 wt% to 1.1 wt%, more preferably 0.97 wt% to 1.05 wt%.
本发明中，所述Fe的含量较佳地为65.65wt％～70.88wt％，例如67.99wt％，68.19wt％。In the present invention, the content of Fe is preferably 65.65wt% to 70.88wt%, for example 67.99wt%, 68.19wt%.
本发明中，较佳地，所述的原料组合物包括：In the present invention, preferably, the raw material composition includes:
R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
Ti：0.3wt％以下、但不为0wt％；Ti: 0.3wt% or less, but not 0wt%;
余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明一较佳实施方式中，所述的原料组合物包括如下组分：In a preferred embodiment of the present invention, the raw material composition includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％；R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%; R2 is Tb, Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Fe:68.19wt％；Fe: 68.19wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
本发明中，较佳地，所述的原料组合物包括：In the present invention, preferably, the raw material composition includes:
R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
Nb：0.3wt％以下、但不为0wt％；Nb: 0.3wt% or less, but not 0wt%;
余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明一较佳实施方式中，所述的原料组合物包括如下组分：In a preferred embodiment of the present invention, the raw material composition includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Nb：0.15wt％；Nb: 0.15wt%;
Fe:68.19wt％；Fe: 68.19wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
本发明中，较佳地，所述的原料组合物包括：In the present invention, preferably, the raw material composition includes:
R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
Nb：0.3wt％以下、但不为0wt％；Nb: 0.3wt% or less, but not 0wt%;
Ga：0.05wt％-0.3wt％；Ga: 0.05wt%-0.3wt%;
余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明一较佳实施方式中，所述的原料组合物包括如下组分：In a preferred embodiment of the present invention, the raw material composition includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Nb：0.05wt％；Nb: 0.05wt%;
Ga：0.3wt％；Ga: 0.3wt%;
Fe:67.99wt％；Fe: 67.99wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明另一较佳实施方式中，所述的原料组合物包括如下组分：In another preferred embodiment of the present invention, the raw material composition includes the following components:
R：29wt％；其中R1为Nd和Dy，Nd为28.6wt％，Dy为0.10wt％，R2为Tb，Tb为0.30wt％；R: 29wt%; where R1 is Nd and Dy, Nd is 28.6wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.30wt%;
B：1.01wt％；B: 1.01wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Ga：0.15wt％；Ga: 0.15wt%;
Fe:69.62wt％；Fe: 69.62wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明另一较佳实施方式中，所述的原料组合物包括如下组分：In another preferred embodiment of the present invention, the raw material composition includes the following components:
R：31wt％；其中R1为Nd和Dy，Nd为30.4wt％，Dy为0.10wt％，R2为Tb，Tb为0.50wt％；R: 31wt%; where R1 is Nd and Dy, Nd is 30.4wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.50wt%;
B：0.98wt％；B: 0.98wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Ga：0.1wt％；Ga: 0.1wt%;
Fe:67.7wt％；Fe: 67.7wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明另一较佳实施方式中，所述的原料组合物包括如下组分：In another preferred embodiment of the present invention, the raw material composition includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.9wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.05wt％；Ti: 0.05wt%;
Ga：0.1wt％；Ga: 0.1wt%;
Fe:68.19wt％；Fe: 68.19wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明另一较佳实施方式中，所述的原料组合物包括如下组分：In another preferred embodiment of the present invention, the raw material composition includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.3wt％；Ti: 0.3wt%;
Ga：0.1wt％；Ga: 0.1wt%;
Fe:67.94wt％；Fe: 67.94wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明另一较佳实施方式中，所述的原料组合物包括如下组分：In another preferred embodiment of the present invention, the raw material composition includes the following components:
R：28wt％；其中R1为Nd和Dy，Nd为27.3wt％，Dy为0.10wt％，R2为Tb，Tb为0.2wt％；R: 28wt%; where R1 is Nd and Dy, Nd is 27.3wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.2wt%;
B：1.1wt％；B: 1.1wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Nb：0.05wt％；Nb: 0.05wt%;
Ga：0.15wt％；Ga: 0.15wt%;
Fe:70.88wt％；Fe: 70.88wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明另一较佳实施方式中，所述的原料组合物包括如下组分：In another preferred embodiment of the present invention, the raw material composition includes the following components:
R：33wt％；其中R1为Nd和Dy和Pr，Nd为31.7wt％，Dy为0.20wt％，Pr为0.1wt％，R2为Tb，Tb为1wt％；R: 33wt%; where R1 is Nd, Dy and Pr, Nd is 31.7wt%, Dy is 0.20wt%, Pr is 0.1wt%, R2 is Tb, and Tb is 1wt%;
B：0.9wt％；B: 0.9wt%;
Cu：0.15wt％；Cu: 0.15wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Al：0.15wt％；Al: 0.15wt%;
Fe:65.65wt％；Fe: 65.65wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
在本发明另一较佳实施方式中，所述的原料组合物包括如下组分：In another preferred embodiment of the present invention, the raw material composition includes the following components:
R：31wt％；其中R1为Nd和Dy，Nd为29.9wt％，Dy为0.10wt％，R2为Tb、Dy和Pr，其中Tb为0.5wt％，Dy为0.30wt％，Pr为0.20wt％；R: 31wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, Dy and Pr, where Tb is 0.5wt%, Dy is 0.30wt%, and Pr is 0.20wt% ；
B：0.97wt％；B: 0.97wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Fe:67.81wt％；Fe: 67.81wt%;
其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
本发明还提供了一种钕铁硼磁体材料的制备方法，其采用如上所述的原料组合物进行，所述制备方法为本领域常规的扩散制法，其中，R1元素在熔炼步骤中添加，R2元素在晶界扩散步骤中添加。The present invention also provides a preparation method of neodymium iron boron magnet material, which adopts the raw material composition as described above. The preparation method is a conventional diffusion method in the art, wherein the R1 element is added in the smelting step, The R2 element is added in the grain boundary diffusion step.
本发明中，所述制备方法较佳地包括如下步骤：将上述钕铁硼磁体材料的原料组合物中除R2以外的元素经熔炼、制粉、成型、烧结得烧结体，接着将所述的烧结体与所述R2的混合物经晶界扩散即可。In the present invention, the preparation method preferably includes the following steps: the elements other than R2 in the raw material composition of the neodymium iron boron magnet material are smelted, powdered, molded, and sintered to obtain a sintered body, and then the The mixture of the sintered body and the R2 may diffuse through the grain boundary.
其中，所述熔炼的操作和条件可为本领域常规的熔炼工艺，一般将所述钕铁硼磁体材料中除R2以外的元素采用铸锭工艺和速凝片工艺进行熔炼浇铸，得到合金片。Wherein, the smelting operation and conditions can be conventional smelting processes in the field. Generally, the elements other than R2 in the neodymium iron boron magnet material are smelted and casted by ingot casting process and quick-setting sheet process to obtain alloy flakes.
本领域技术人员知晓，因熔炼和烧结工艺中通常会损耗稀土元素，为保证终产品的质量，一般会在熔炼过程中在原料组合物的配方基础中额外添加0～0.3wt％的稀土元素(一般为Nd元素)，百分比为额外添加的稀土元素的含量占所述原料组合物的总含量的质量百分比；另外这部分额外添加的稀土元素的含量不计入原料组合物的范畴。Those skilled in the art know that because rare earth elements are usually lost in the smelting and sintering process, in order to ensure the quality of the final product, an additional 0-0.3wt% rare earth element ( Generally Nd element), the percentage is the mass percentage of the content of the additional rare earth element to the total content of the raw material composition; in addition, the content of this part of the additional rare earth element is not included in the scope of the raw material composition.
所述熔炼的温度可为1300～1700℃，较佳地为1450～1550℃，例如1500℃。The temperature of the smelting may be 1300 to 1700°C, preferably 1450 to 1550°C, such as 1500°C.
所述熔炼的设备一般为高频真空熔炼炉和/或中频真空熔炼炉，中频真空熔炼炉例如中频真空感应速凝甩带炉。The smelting equipment is generally a high-frequency vacuum melting furnace and/or an intermediate frequency vacuum melting furnace, such as an intermediate frequency vacuum induction rapid-setting belt spinning furnace.
其中，所述制粉的操作和条件可为本领域常规制粉工艺，一般包括氢破制粉和/或气流磨制粉。Wherein, the operation and conditions of the pulverizing can be conventional pulverizing processes in the field, and generally include hydrogen crushing pulverizing and/or jet milling pulverizing.
所述氢破制粉一般包括吸氢、脱氢和冷却处理。所述吸氢的温度一般为20～200℃。所述脱氢的温度一般为400～650℃，较佳地为500～550℃。所述吸氢的压力一般为50～600kPa，例如90kPa。The hydrogen crushing and pulverizing generally includes hydrogen absorption, dehydrogenation and cooling treatment. The temperature of the hydrogen absorption is generally 20 to 200°C. The temperature of the dehydrogenation is generally 400-650°C, preferably 500-550°C. The pressure of the hydrogen absorption is generally 50 to 600 kPa, such as 90 kPa.
所述气流磨制粉一般在0.1～2MPa，优选0.5～0.7MPa的条件下进行气流磨制粉。所述气流磨制粉中的气流例如可为氮气。所述气流磨制粉的时间可为2～4h。The air-jet milling powder is generally carried out under the conditions of 0.1-2 MPa, preferably 0.5-0.7 MPa. The gas stream in the gas stream milling powder can be, for example, nitrogen gas. The time for the air jet milling can be 2 to 4 hours.
其中，所述成型的操作和条件可为本领域常规的成型工艺。例如磁场成型法。所述的磁场成型法的磁场强度一般在1.5T以上。Wherein, the molding operation and conditions can be conventional molding processes in the field. For example, the magnetic field forming method. The magnetic field strength of the magnetic field forming method is generally above 1.5T.
其中，所述烧结的操作和条件可为本领域常规的烧结工艺。Wherein, the sintering operation and conditions can be conventional sintering processes in the field.
所述烧结可在真空度低于5×10 -1Pa的条件下进行。 The sintering can be performed under the condition of a vacuum degree of less than 5×10 -1 Pa.
所述烧结的温度可为1000～1200℃，例如1030-1090℃。The sintering temperature may be 1000-1200°C, for example 1030-1090°C.
所述烧结的时间可为0.5～10h，例如2-5h。The sintering time may be 0.5-10h, for example 2-5h.
本发明中，本领域技术人员知晓，在所述的晶界扩散之前一般还包括所述R2的涂覆操作。In the present invention, those skilled in the art know that the R2 coating operation is generally included before the grain boundary diffusion.
其中，所述R2一般是以氟化物或低熔点合金的形式涂覆，例如Tb的氟化物。当还包含Dy时，较佳地，Dy以Dy的氟化物的形式涂覆。另外，当还包含Pr时，较佳地，Pr以PrCu合金的形式添加。Wherein, the R2 is generally coated in the form of fluoride or a low melting point alloy, such as fluoride of Tb. When Dy is also contained, it is preferable that Dy is coated in the form of fluoride of Dy. In addition, when Pr is also included, it is preferable to add Pr in the form of a PrCu alloy.
当所述R2包含Pr且Pr以PrCu合金的形式参与晶界扩散时，较佳地，Cu在所述制备方法中的添加时机为晶界扩散步骤，或者在熔炼步骤和晶界扩散步骤同时添加；当所述Cu在晶界扩散时添加，所述Cu的含量较佳地为0.03～0.15wt％，wt％为元素占所述原料组合物的质量百分比；其中所述Cu占所述PrCu的百分比为0.1～17wt％。When the R2 contains Pr and Pr participates in the grain boundary diffusion in the form of a PrCu alloy, preferably, the timing of Cu addition in the preparation method is the grain boundary diffusion step, or the smelting step and the grain boundary diffusion step are added at the same time When the Cu is added at the grain boundary diffusion, the content of Cu is preferably 0.03 to 0.15 wt%, and wt% is the mass percentage of the element in the raw material composition; wherein the Cu accounts for the PrCu The percentage is 0.1-17wt%.
本发明中，所述晶界扩散处理的操作和条件可为本领域常规的晶界扩散工艺。In the present invention, the operation and conditions of the grain boundary diffusion treatment can be a conventional grain boundary diffusion process in the art.
所述晶界扩散的温度可为800～1000℃，例如850℃。The temperature of the grain boundary diffusion may be 800-1000°C, for example 850°C.
所述晶界扩散的时间可为5～20h，例如5-15h。The time for the grain boundary diffusion may be 5-20h, for example 5-15h.
所述晶界扩散之后，按照本领域常规还进行低温回火处理。低温回火处理的温度一般为460-560℃，时间一般为1-3h。After the grain boundary diffuses, a low-temperature tempering treatment is also performed according to the conventional practice in the art. The temperature of low temperature tempering treatment is generally 460-560℃, and the time is generally 1-3h.
本发明还提供了一种由上述制备方法制得的钕铁硼磁体材料。The invention also provides a neodymium iron boron magnet material prepared by the above preparation method.
本发明还提供了一种钕铁硼磁体材料，R：28～33wt％；所述R包括R1和R2，所述R1包括Nd和Dy，所述R2包括Tb；R2的含量为0.2wt％～1wt％；The present invention also provides a neodymium iron boron magnet material, R: 28-33wt%; said R includes R1 and R2, said R1 includes Nd and Dy, said R2 includes Tb, and the content of R2 is 0.2wt%~ 1wt%;
B：0.9～1.1wt％；B: 0.9～1.1wt%;
Cu：0.15wt％以下、且不为0wt％；Cu: 0.15wt% or less and not 0wt%;
M：0.35wt％以下、且不为0wt％；M: 0.35wt% or less and not 0wt%;
M包括Ti、Ni、V、Nb、Ta、Cr、Mo、W、Mn、Zr、Hf、Zn和Ag中的一种或多种；M includes one or more of Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn and Ag;
Fe：60wt％～70.88wt％；Fe: 60wt%～70.88wt%;
wt％为各元素占所述钕铁硼磁体材料的质量百分比；wt% is the mass percentage of each element in the neodymium iron boron magnet material;
所述钕铁硼磁体材料中不含Co；The neodymium iron boron magnet material does not contain Co;
所述钕铁硼磁体材料包含Nd 2Fe l4B晶粒和其壳层、邻接所述Nd 2Fe l4B晶粒的二颗粒晶界和晶界三角区，其中R1中的重稀土元素主要分布在Nd 2Fe l4B晶粒，R2主要分布在所述壳层、所述二颗粒晶界和所述晶界三角区，所述晶界三角区的面积占比为1.5％～3.5％；所述钕铁硼磁体材料的晶界连续性为96％以上；晶界三角区中C和O的质量占比为0.4～0.5％，二颗粒晶界中C和O的质量占比为0.35％以上。 The neodymium iron boron magnet material comprises Nd 2 Fe l4 B crystal grains and its shell layer, two grain boundaries adjacent to the Nd 2 Fe l4 B crystal grains and a grain boundary triangle region, wherein the heavy rare earth elements in R1 are mainly distributed In the Nd 2 Fe 14 B crystal grains, R2 is mainly distributed in the shell layer, the two-grain boundary and the grain boundary triangle area, and the area of the grain boundary triangle area accounts for 1.5% to 3.5%; The continuity of the grain boundary of the neodymium iron boron magnet material is more than 96%; the mass ratio of C and O in the triangular area of the grain boundary is 0.4-0.5%, and the mass ratio of C and O in the two-grain grain boundary is more than 0.35% .
本发明中，“R1中的重稀土元素主要分布在Nd 2Fe l4B晶粒”可理解为，本领域常规的熔炼烧结工艺引起的R1中的重稀土元素主要分布(一般是指95％以上)在主相晶粒，少量分布在晶界。“R2主要分布在所述壳层、所述二颗粒晶界和所述晶界三角区”可理解为，本领域常规的晶界扩散工艺引起的R2主要分布(一般是指95％以上)在主相晶粒的壳层、所述二颗粒晶界和所述晶界三角区，少部分也会扩散进入到主相晶粒中，例如在主相晶粒的外缘。 In the present invention, "the heavy rare earth elements in R1 are mainly distributed in Nd 2 Fe l4 B crystal grains" can be understood as the main distribution of heavy rare earth elements in R1 caused by the conventional smelting and sintering process in this field (generally refers to more than 95% ) In the main phase grains, a small amount is distributed in the grain boundaries. "R2 is mainly distributed in the shell layer, the two-particle grain boundary and the grain boundary triangle area" can be understood as the main distribution of R2 (generally more than 95%) caused by the conventional grain boundary diffusion process in the field A small part of the shell layer of the main phase crystal grains, the two-grain grain boundary and the grain boundary triangle region will also diffuse into the main phase crystal grains, for example, at the outer edges of the main phase crystal grains.
本发明中，晶界连续性的计算方式是指晶界中除空洞外的物相占据的长度(例如富B相、富稀土相、稀土氧化物、稀土碳化物等)与总晶界长度的比值。晶界连续性超过96％即可称为连续通道。In the present invention, the calculation method of grain boundary continuity refers to the length occupied by phases other than voids in the grain boundary (such as B-rich phase, rare earth-rich phase, rare earth oxide, rare earth carbide, etc.) and the total grain boundary length ratio. Grain boundary continuity of more than 96% can be called continuous channel.
本发明中，所述晶界三角区一般是指三条或以上的晶界相交叉的地方，分布有富B相、富稀土相、稀土氧化物、稀土碳化物和空洞。所述晶界三角区面积占比的计算方式是指晶界三角区的面积与总面积(晶粒+晶界)之比。In the present invention, the grain boundary triangle area generally refers to a place where three or more grain boundary phases intersect, and there are B-rich phases, rare earth-rich phases, rare earth oxides, rare earth carbides, and cavities distributed. The calculation method of the area ratio of the grain boundary triangle area refers to the ratio of the area of the grain boundary triangle area to the total area (grain + grain boundary).
其中，稀土氧化物、稀土碳化物中的C、O元素为本领域常规方式引入，一般为杂质引入或者气氛引入，具体例如，在气流磨、压制过程中，有添加剂的引入，在烧结的时候，会通过加热对这些添加剂进行脱去处理，但是不可避免会有少量C、O元素残留；再例如，在制备工艺中不可避免地会因气氛引入少量O元素。在本申请中，经检测最终 得到的钕铁硼磁体材料产品中，C、O含量分别只有1000、1200ppm以下，属于本领域常规的可接受的杂质范畴，故未纳入产品元素统计表。Among them, the C and O elements in rare earth oxides and rare earth carbides are introduced in conventional ways in the art, generally impurity introduction or atmosphere introduction. Specifically, for example, during jet milling and pressing, additives are introduced, and during sintering , These additives will be removed by heating, but a small amount of C and O elements will inevitably remain; for another example, a small amount of O elements will inevitably be introduced due to the atmosphere in the preparation process. In this application, the content of C and O in the final NdFeB magnet material product obtained after testing are only below 1000 ppm and 1200 ppm respectively, which belong to the category of conventional acceptable impurities in the field, so they are not included in the product element statistical table.
本发明的方案中，Tb通过晶界扩散形成覆盖层，提高矫顽力；Dy可以减少熔炼时的α-Fe的产生量，有益于产品磁性能的提升。In the solution of the present invention, Tb diffuses through the grain boundary to form a covering layer to improve the coercivity; Dy can reduce the amount of α-Fe produced during smelting, which is beneficial to the improvement of the magnetic properties of the product.
本发明中，本领域技术人员知晓，C、O元素在晶界相中通常是以稀土碳化物和稀土氧化物的形式存在，因此“晶界三角区中C和O的质量占比”以及“二颗粒晶界中C和O的质量占比”分别对应杂相稀土碳化物和稀土氧化物。In the present invention, those skilled in the art know that C and O elements usually exist in the form of rare earth carbides and rare earth oxides in the grain boundary phase, so "the mass ratio of C and O in the grain boundary triangle area" and " The mass ratios of C and O in the grain boundaries of the two grains correspond to heterogeneous rare earth carbides and rare earth oxides, respectively.
其中，“二颗粒晶界中C和O的质量占比(％)”中百分比为二颗粒晶界中C和O的质量与晶界中所有元素的总质量的比”，“晶界三角区中C和O的质量占比”中百分比为晶界三角区中C和O的质量与晶界中所有元素的总质量的比。Among them, the percentage of "the mass ratio of C and O in the two-grain boundary (%)" is the ratio of the mass of C and O in the two-grain boundary to the total mass of all elements in the grain boundary", "the triangle area of the grain boundary" The percentage in the "mass ratio of C and O" refers to the ratio of the mass of C and O in the triangular area of the grain boundary to the total mass of all elements in the grain boundary.
另外，根据实施例中“晶界三角区中C和O的质量占比”减去“二颗粒晶界中C和O的质量占比(％)”的差值相比对比例缩小，可得到杂相从晶界三角区迁移到二颗粒晶界的结论，这从机理上解释了晶界连续性的提升原因。本发明中，所述晶界三角区面积占比较佳地为1.59％～3.28％，例如1.59％、1.88％、2.34％、2.36％、2.38％、2.45％、2.54％、2.62％、2.68％、3.28％，更佳地为1.59％～2％。In addition, according to the "mass ratio of C and O in the triangular area of the grain boundary" minus the "mass ratio of C and O in the two grain boundaries (%)" in the embodiment, the difference is smaller than the comparison ratio, and it can be obtained The conclusion that the impurity phase migrates from the triangular area of the grain boundary to the two-grain grain boundary explains the reason for the improvement of the continuity of the grain boundary from the mechanism. In the present invention, the area of the grain boundary triangle area is preferably 1.59% to 3.28%, such as 1.59%, 1.88%, 2.34%, 2.36%, 2.38%, 2.45%, 2.54%, 2.62%, 2.68%, 3.28%, more preferably 1.59% to 2%.
本发明中，所述晶界连续性较佳地为97％以上，例如97.01％，97.20％，98.50％，98.00％，98.10％，98.22％，98.41％，98.36％，98.80％，99.50％，更佳地为98％以上。In the present invention, the grain boundary continuity is preferably 97% or more, for example, 97.01%, 97.20%, 98.50%, 98.00%, 98.10%, 98.22%, 98.41%, 98.36%, 98.80%, 99.50%, more Preferably, it is above 98%.
本发明中，所述二颗粒晶界中C和O的质量占比较佳地为0.37％～0.4％。In the present invention, the mass of C and O in the two-grain boundary is preferably 0.37% to 0.4%.
本发明磁体材料的二颗粒晶界中，除稀土氧化物和稀土碳化物这两种杂相外，较佳地，还在二颗粒晶界检测到新物相，其化学组成为R xFe 100-x-y-zCu yM z；其中R包括Nd、Dy和Tb中的一种或多种，M包括Ti、Ni、V、Nb、Ta、Cr、Mo、W、Mn、Zr、Hf、Zn和Ag中的一种或多种，x为32～36，y为0.1以下，但不为0，z为0.15以下，但不为0；其中，x优选为32.5～35.5，y优选为0.02～0.1，z优选为0.07～0.12。 In the two-grain boundary of the magnet material of the present invention, in addition to the two kinds of impurity phases of rare earth oxide and rare-earth carbide, preferably, a new phase is also detected at the two-grain boundary, and its chemical composition is R x Fe 100 -xyz Cu y M z ; where R includes one or more of Nd, Dy and Tb, and M includes Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn and Ag X is 32-36, y is 0.1 or less, but not 0, z is 0.15 or less, but not 0; wherein, x is preferably 32.5 to 35.5, and y is preferably 0.02 to 0.1, z is preferably 0.07 to 0.12.
在本申请的较佳实施方式中，新物相的结构例如，R 34.5Fe 65.4Cu 0.03M 0.07，R 34.1Fe 65.68Cu 0.1M 0.12，R 33.2Fe 66.68Cu 0.04M 0.08，R 33.56Fe 66.28Cu 0.05M 0.11，R 34.41Fe 65.42Cu 0.08M 0.09，R 35.26Fe 64.58Cu 0.07M 0.09，R 35.50Fe 64.38Cu 0.04M 0.08，R 32.50Fe 67.39Cu 0.03M 0.08，R 33.33Fe 66.58Cu 0.02M 0.07，R 34.22Fe 65.64Cu 0.06M 0.08。 In the preferred embodiment of this application, the structure of the new phase is, for example, R 34.5 Fe 65.4 Cu 0.03 M 0.07 , R 34.1 Fe 65.68 Cu 0.1 M 0.12 , R 33.2 Fe 66.68 Cu 0.04 M 0.08 , R 33.56 Fe 66.28 Cu 0.05 M 0.11 , R 34.41 Fe 65.42 Cu 0.08 M 0.09 , R 35.26 Fe 64.58 Cu 0.07 M 0.09 , R 35.50 Fe 64.38 Cu 0.04 M 0.08 , R 32.50 Fe 67.39 Cu 0.03 M 0.08 , R 33.33 Fe 66.58 Cu 0.02 M 0.07 , R 34.22 Fe 65.64 Cu 0.06 M 0.08 .
本发明中，所述化学组成为R xFe 100-x-y-zCu yM z的新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比较佳地为0.8～3％，更佳地为0.81～2.64％。 In the present invention, the area of the new phase of the chemical composition of R x Fe 100-xyz Cu y M z in the two-grain boundary and the total area of the two-grain boundary is preferably 0.8-3 %, more preferably 0.81 to 2.64%.
发明人推测，该新物相在二颗粒晶界生成，所以进一步提高了晶界连续性，从而提升了磁体性能。The inventor speculates that the new phase is formed at the grain boundary of the two particles, so the continuity of the grain boundary is further improved, thereby improving the performance of the magnet.
本发明中，所述钕铁硼磁体材料中R的用量较佳地为29-31wt％。In the present invention, the amount of R in the neodymium iron boron magnet material is preferably 29-31 wt%.
本发明中，所述钕铁硼磁体材料中，所述R中Nd的含量可为本领域常规，较佳地为28～32.5wt％，百分比为占所述钕铁硼磁体材料总质量的质量百分比。In the present invention, in the neodymium iron boron magnet material, the content of Nd in the R can be conventional in the art, preferably 28-32.5 wt%, and the percentage is the mass of the total mass of the neodymium iron boron magnet material percentage.
本发明中，所述钕铁硼磁体材料中，所述R1中Dy的含量较佳地在0.2wt％以下，例如0.1～0.2wt％。In the present invention, in the neodymium iron boron magnet material, the content of Dy in the R1 is preferably less than 0.2 wt%, for example, 0.1 to 0.2 wt%.
本发明中，所述R1还可包括本领域其他常规的稀土元素，例如包括Pr、Ho、Tb、Gd和Y中的一种或多种。In the present invention, the R1 may also include other conventional rare earth elements in the art, for example, including one or more of Pr, Ho, Tb, Gd, and Y.
其中，当所述R1包含Pr时，Pr的添加形式为本领域常规，例如以PrNd的形式，或者，以纯净的Pr和Nd的混合物的形式，或者以PrNd、纯净的Pr和Nd的混合物联合添加。当以PrNd的形式添加时，Pr：Nd＝25:75或20：80；当以纯净的Pr和Nd的混合物的形式或以PrNd、纯净的Pr和Nd的混合物联合添加时，所述Pr的含量较佳地为0.1～2wt％，例如0.1wt％，0.2wt％，其中百分比为各组分含量占所述钕铁硼磁体材料总质量的质量百分比。Wherein, when the R1 contains Pr, the addition form of Pr is conventional in the art, for example, in the form of PrNd, or in the form of a mixture of pure Pr and Nd, or combined with a mixture of PrNd and pure Pr and Nd Add to. When added in the form of PrNd, Pr:Nd=25:75 or 20:80; when added in the form of a mixture of pure Pr and Nd or a combination of PrNd, pure Pr and Nd, the Pr The content is preferably 0.1 to 2 wt%, such as 0.1 wt%, 0.2 wt%, where the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
其中，当所述的R1包含Ho时，所述Ho的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述钕铁硼磁体材料总质量的质量百分比。Wherein, when the R1 includes Ho, the content of Ho is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
其中，当所述的R1包含Gd时，所述Gd的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述钕铁硼磁体材料总质量的质量百分比。Wherein, when the R1 includes Gd, the content of Gd is preferably 0.1 to 0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
其中，当所述的R1包含Y时，所述Y的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述钕铁硼磁体材料总质量的质量百分比。Wherein, when the R1 contains Y, the content of Y is preferably 0.1-0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
本发明中，所述R2的含量较佳地为0.2wt％～0.8wt％，百分比为各组分含量占所述钕铁硼磁体材料总质量的质量百分比。In the present invention, the content of R2 is preferably 0.2 wt% to 0.8 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material.
本发明中，所述R2中，Tb的含量较佳地为0.2wt％～0.8wt％，例如0.6wt％。In the present invention, the content of Tb in the R2 is preferably 0.2 wt% to 0.8 wt%, for example, 0.6 wt%.
本发明中，所述R2还可包括Pr、Dy、Ho和Gd中的一种或多种。这些稀土元素都可以通过晶界扩散原理，形成扩散稀土元素的壳层。In the present invention, the R2 may also include one or more of Pr, Dy, Ho and Gd. These rare earth elements can form a shell layer for diffusing rare earth elements through the principle of grain boundary diffusion.
其中，当所述的R2包含Pr时，所述Pr的含量较佳地为0.2wt％以下，且不为0wt％，例如0.2wt％，wt％为元素占所述钕铁硼磁体材料的质量百分比。Wherein, when the R2 contains Pr, the content of Pr is preferably 0.2wt% or less, and not 0wt%, for example 0.2wt%, and wt% is the mass of the element in the neodymium iron boron magnet material percentage.
其中，当所述R2包含Dy时，所述Dy的含量较佳地为0.3wt％以下，且不为0wt％，例如0.3wt％，wt％为元素占所述钕铁硼磁体材料的质量百分比。Wherein, when the R2 includes Dy, the content of Dy is preferably 0.3 wt% or less, and not 0 wt%, such as 0.3 wt%, and wt% is the mass percentage of the element in the neodymium iron boron magnet material .
其中，当所述R2包括Ho时，所述Ho的含量较佳地为0.15wt％以下、且不为0wt％，wt％为元素占所述钕铁硼磁体材料的质量百分比。Wherein, when the R2 includes Ho, the content of Ho is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the neodymium iron boron magnet material.
其中，当所述R2包括Gd时，所述Gd的含量较佳地为0.15wt％以下、且不为0wt％， wt％为元素占所述钕铁硼磁体材料的质量百分比。Wherein, when the R2 includes Gd, the content of the Gd is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the neodymium iron boron magnet material.
本发明中，所述M的含量较佳地为0.1wt％～0.15wt％，或者0.25wt％～0.4wt％，例如0.15wt％，0.25wt％，0.3wt％，0.35wt％，0.4wt％。In the present invention, the content of M is preferably 0.1wt% to 0.15wt%, or 0.25wt% to 0.4wt%, such as 0.15wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt% .
本发明，所述M的种类较佳地为Ti、Zr、Nb、Ni、V、Ta、Cr、Mo、W、Mn、Hf和Ag中的一种或多种。In the present invention, the type of M is preferably one or more of Ti, Zr, Nb, Ni, V, Ta, Cr, Mo, W, Mn, Hf and Ag.
其中，当所述M包含Ti时，所述Ti的含量较佳地为0.05wt％～0.3wt％，例如0.05wt％，0.15wt％，0.3wt％，更佳地为0.1wt％～0.15wt％。Wherein, when the M contains Ti, the content of Ti is preferably 0.05 wt% to 0.3 wt%, such as 0.05 wt%, 0.15 wt%, 0.3 wt%, and more preferably 0.1 wt% to 0.15 wt% %.
其中，当所述的M包含Nb时，所述Nb的含量较佳地为0.05wt％～0.15wt％，例如0.05wt％，0.15wt％，更佳地为0.05wt％～0.1wt％。Wherein, when the M contains Nb, the Nb content is preferably 0.05 wt% to 0.15 wt%, such as 0.05 wt%, 0.15 wt%, and more preferably 0.05 wt% to 0.1 wt%.
其中，所述M的种类较佳地还包括Bi、Sn、Zn、Ga、In、Au和Pb中的一种或多种。Wherein, the type of M preferably further includes one or more of Bi, Sn, Zn, Ga, In, Au and Pb.
其中，当所述M包括Ga时，所述Ga的含量范围较佳地为0.1～0.3wt％，例如0.1wt％，0.15wt％，0.3wt％。Wherein, when the M includes Ga, the content of Ga is preferably in the range of 0.1 to 0.3 wt%, for example, 0.1 wt%, 0.15 wt%, or 0.3 wt%.
当M元素包括Ga，且Ga为0.2wt％以上、且不为0.35wt％时，较佳地，M元素的组成中Ti+Nb为0.07wt％以下、且不为0wt％，例如0.05wt％。其中，Ti+Nb过量的话，可能会降低剩磁。When the M element includes Ga, and Ga is 0.2wt% or more and not 0.35wt%, preferably, Ti+Nb in the composition of the M element is 0.07wt% or less and not 0wt%, for example, 0.05wt% . Among them, if Ti+Nb is excessive, the remanence may be reduced.
本发明中，较佳地，所述钕铁硼磁体材料中还含有Al；其含量较佳地为0.15wt％以下，但不为0wt％，例如0.15wt％。In the present invention, preferably, the neodymium iron boron magnet material also contains Al; its content is preferably less than 0.15 wt%, but not 0 wt%, such as 0.15 wt%.
当所述M包括Ga，且Ga为0.01wt％以下时，Al+Ga+Cu可为0.15wt％以下、且不为0wt％，例如0.12wt％；较佳地，Al+Ga+Cu为0.11wt％以下、且不为0wt％，例如0.07wt％。When the M includes Ga and Ga is 0.01wt% or less, Al+Ga+Cu may be 0.15wt% or less and not 0wt%, such as 0.12wt%; preferably, Al+Ga+Cu is 0.11 wt% or less, and not 0 wt%, for example, 0.07 wt%.
本发明中，所述Cu的含量较佳地为0.08wt％以下、但不为0wt％，或者0.1wt％～0.15wt％，例如0.07wt％，0.15wt％。In the present invention, the content of Cu is preferably 0.08 wt% or less, but not 0 wt%, or 0.1 wt% to 0.15 wt%, such as 0.07 wt%, 0.15 wt%.
本发明中，所述B的含量较佳地为0.9wt％～1.1wt％，更佳地为0.97wt％～1.05wt％。In the present invention, the content of B is preferably 0.9 wt% to 1.1 wt%, more preferably 0.97 wt% to 1.05 wt%.
本发明中，所述Fe的含量较佳地为65.65wt％～70.88wt％，例如67.99wt％，68.19wt％。In the present invention, the content of Fe is preferably 65.65wt% to 70.88wt%, for example 67.99wt%, 68.19wt%.
本发明中，较佳地，所述的钕铁硼磁体材料包括：In the present invention, preferably, the neodymium iron boron magnet material includes:
R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
Ti：0.3wt％以下、但不为0wt％；Ti: 0.3wt% or less, but not 0wt%;
余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比。Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material.
在本发明一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In a preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％；R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%; R2 is Tb, Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Fe:68.19wt％；Fe: 68.19wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为2.34％；所述钕铁硼磁体材料的晶界连续性为98％；晶界三角区中C和O的质量占比为0.45％，二颗粒晶界中C和O的质量占比为0.39％；二颗粒晶界中检测到新物相R 34.5Fe 65.4Cu 0.03M 0.07，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为2.35％。 The area of the triangular area of the grain boundary accounts for 2.34%; the continuity of the grain boundary of the NdFeB magnet material is 98%; the mass ratio of C and O in the triangular area of the grain boundary is 0.45%. The mass ratio of C and O is 0.39%; the new phase R 34.5 Fe 65.4 Cu 0.03 M 0.07 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 2.35%.
本发明中，较佳地，所述的钕铁硼磁体材料包括：In the present invention, preferably, the neodymium iron boron magnet material includes:
R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
Nb：0.3wt％以下、但不为0wt％；Nb: 0.3wt% or less, but not 0wt%;
余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比。Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material.
在本发明一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In a preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Nb：0.15wt％；Nb: 0.15wt%;
Fe:68.19wt％；Fe: 68.19wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为2.36％；所述钕铁硼磁体材料的晶界连续性为98.41％； 晶界三角区中C和O的质量占比为0.41％，二颗粒晶界中C和O的质量占比为0.38％；二颗粒晶界中检测到新物相R 35.26Fe 64.58Cu 0.07M 0.09，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.12％。 The area of the grain boundary triangle area accounts for 2.36%; the grain boundary continuity of the neodymium iron boron magnet material is 98.41%; the mass ratio of C and O in the grain boundary triangle area is 0.41%. The mass ratio of C and O is 0.38%; a new phase R 35.26 Fe 64.58 Cu 0.07 M 0.09 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.12%.
本发明中，较佳地，所述的钕铁硼磁体材料包括：In the present invention, preferably, the neodymium iron boron magnet material includes:
R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
Nb：0.3wt％以下、但不为0wt％；Nb: 0.3wt% or less, but not 0wt%;
Ga：0.05wt％-0.3wt％；Ga: 0.05wt%-0.3wt%;
余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比。Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material.
在本发明一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In a preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Nb：0.05wt％；Nb: 0.05wt%;
Ga：0.3wt％；Ga: 0.3wt%;
Fe:67.99wt％；Fe: 67.99wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为2.45％；所述钕铁硼磁体材料的晶界连续性为98.80％；晶界三角区中C和O的质量占比为0.45％，二颗粒晶界中C和O的质量占比为0.39％，二颗粒晶界中检测到新物相R 35.50Fe 64.38Cu 0.04M 0.08，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为2.03％。 The area of the grain boundary triangle area accounts for 2.45%; the grain boundary continuity of the neodymium iron boron magnet material is 98.80%; the mass ratio of C and O in the grain boundary triangle area is 0.45%. The mass ratio of C and O is 0.39%, the new phase R 35.50 Fe 64.38 Cu 0.04 M 0.08 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 2.03%.
在本发明另一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In another preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：29wt％；其中R1为Nd和Dy，Nd为28.6wt％，Dy为0.10wt％，R2为Tb，Tb为0.30wt％；R: 29wt%; where R1 is Nd and Dy, Nd is 28.6wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.30wt%;
B：1.01wt％；B: 1.01wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Ga：0.15wt％；Ga: 0.15wt%;
Fe:69.62wt％；Fe: 69.62wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为1.88％；所述钕铁硼磁体材料的晶界连续性为97.20％；晶界三角区中C和O的质量占比为0.44％，二颗粒晶界中C和O的质量占比为0.38％，二颗粒晶界中检测到新物相R 34.1Fe 65.68Cu 0.1M 0.12，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.74％。 The area of the grain boundary triangle area accounts for 1.88%; the grain boundary continuity of the neodymium iron boron magnet material is 97.20%; the mass ratio of C and O in the grain boundary triangle area is 0.44%. The mass ratio of C and O is 0.38%. A new phase R 34.1 Fe 65.68 Cu 0.1 M 0.12 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.74%.
在本发明另一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In another preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：31wt％；其中R1为Nd和Dy，Nd为30.4wt％，Dy为0.10wt％，R2为Tb，Tb为0.50wt％；R: 31wt%; where R1 is Nd and Dy, Nd is 30.4wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.50wt%;
B：0.98wt％；B: 0.98wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Ga：0.1wt％；Ga: 0.1wt%;
Fe:67.7wt％；Fe: 67.7wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为2.68％；所述钕铁硼磁体材料的晶界连续性为98.36％；晶界三角区中C和O的质量占比为0.45％，二颗粒晶界中C和O的质量占比为0.39％，二颗粒晶界中检测到新物相R 33.2Fe 66.68Cu 0.04M 0.08，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.94％。 The area of the triangular area of the grain boundary accounts for 2.68%; the continuity of the grain boundary of the NdFeB magnet material is 98.36%; the mass ratio of C and O in the triangular area of the grain boundary is 0.45%. The mass ratio of C and O is 0.39%. A new phase R 33.2 Fe 66.68 Cu 0.04 M 0.08 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.94%.
在本发明另一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In another preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.9wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.05wt％；Ti: 0.05wt%;
Ga：0.1wt％；Ga: 0.1wt%;
Fe:68.19wt％；Fe: 68.19wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为2.38％；所述钕铁硼磁体材料的晶界连续性为98.10％；晶界三角区中C和O的质量占比为0.44％，二颗粒晶界中C和O的质量占比为0.4％， 二颗粒晶界中检测到新物相R 33.56Fe 66.28Cu 0.05M 0.11，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为0.81％。 The area of the grain boundary triangle area accounts for 2.38%; the grain boundary continuity of the neodymium iron boron magnet material is 98.10%; the mass ratio of C and O in the grain boundary triangle area is 0.44%. The mass ratio of C and O is 0.4%. The new phase R 33.56 Fe 66.28 Cu 0.05 M 0.11 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 0.81%.
在本发明另一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In another preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
B：0.99wt％；B: 0.99wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.3wt％；Ti: 0.3wt%;
Ga：0.1wt％；Ga: 0.1wt%;
Fe:67.94wt％；Fe: 67.94wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为2.54％；所述钕铁硼磁体材料的晶界连续性为98.22％；晶界三角区中C和O的质量占比为0.43％，二颗粒晶界中C和O的质量占比为0.4％，二颗粒晶界中检测到新物相R 34.41Fe 65.42Cu 0.08M 0.09，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为2.64％。 The area of the grain boundary triangle area accounts for 2.54%; the grain boundary continuity of the neodymium iron boron magnet material is 98.22%; the mass ratio of C and O in the grain boundary triangle area is 0.43%. The mass ratio of C and O is 0.4%, the new phase R 34.41 Fe 65.42 Cu 0.08 M 0.09 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 2.64%.
在本发明另一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In another preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：28wt％；其中R1为Nd和Dy，Nd为27.3wt％，Dy为0.10wt％，R2为Tb，Tb为0.2wt％；R: 28wt%; where R1 is Nd and Dy, Nd is 27.3wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.2wt%;
B：1.1wt％；B: 1.1wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Nb：0.05wt％；Nb: 0.05wt%;
Ga：0.15wt％；Ga: 0.15wt%;
Fe:70.88wt％；Fe: 70.88wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为1.59％；所述钕铁硼磁体材料的晶界连续性为97.01％；晶界三晶界三角区中C和O的质量占比为0.46％，二颗粒晶界中C和O的质量占比为0.38％，二颗粒晶界中检测到新物相R 32.50Fe 67.39Cu 0.03M 0.08，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.06％。 The area of the grain boundary triangle area accounts for 1.59%; the grain boundary continuity of the neodymium iron boron magnet material is 97.01%; the mass ratio of C and O in the grain boundary triangle area of the three grain boundaries is 0.46%, and the two particles The mass ratio of C and O in the grain boundary is 0.38%. A new phase R 32.50 Fe 67.39 Cu 0.03 M 0.08 is detected in the two grain boundaries. The ratio of the total area of the grain boundaries of the particles is 1.06%.
在本发明另一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In another preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：33wt％；其中R1为Nd和Dy和Pr，Nd为31.7wt％，Dy为0.20wt％，Pr为0.1wt％， R2为Tb，Tb为1wt％；R: 33wt%; where R1 is Nd, Dy and Pr, Nd is 31.7wt%, Dy is 0.20wt%, Pr is 0.1wt%, R2 is Tb, and Tb is 1wt%;
B：0.9wt％；B: 0.9wt%;
Cu：0.15wt％；Cu: 0.15wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Al：0.15wt％；Al: 0.15wt%;
Fe:65.65wt％；Fe: 65.65wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为3.28％；所述钕铁硼磁体材料的晶界连续性为99.50％；晶界三角区中C和O的质量占比为0.46％，二颗粒晶界中C和O的质量占比为0.37％，二颗粒晶界中检测到新物相R 33.33Fe 66.58Cu 0.02M 0.07，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.58％。 The area of the triangular area of the grain boundary accounts for 3.28%; the continuity of the grain boundary of the neodymium iron boron magnet material is 99.50%; the mass ratio of C and O in the triangular area of the grain boundary is 0.46%. The mass ratio of C and O is 0.37%. A new phase R 33.33 Fe 66.58 Cu 0.02 M 0.07 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.58%.
在本发明另一较佳实施方式中，所述的钕铁硼磁体材料包括如下组分：In another preferred embodiment of the present invention, the neodymium iron boron magnet material includes the following components:
R：31wt％；其中R1为Nd和Dy，Nd为29.9wt％，Dy为0.10wt％，R2为Tb、Dy和Pr，其中Tb为0.5wt％，Dy为0.30wt％，Pr为0.20wt％；R: 31wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, Dy and Pr, where Tb is 0.5wt%, Dy is 0.30wt%, and Pr is 0.20wt% ；
B：0.97wt％；B: 0.97wt%;
Cu：0.07wt％；Cu: 0.07wt%;
Ti：0.15wt％；Ti: 0.15wt%;
Fe:67.81wt％；Fe: 67.81wt%;
其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
所述晶界三角区面积占比为2.62％；所述钕铁硼磁体材料的晶界连续性为98.50％；晶界三角区中C和O的质量占比为0.48％，二颗粒晶界中C和O的质量占比为0.39％，二颗粒晶界中检测到新物相R 34.22Fe 65.64Cu 0.06M 0.08，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.87％。 The area of the triangular area of the grain boundary accounts for 2.62%; the continuity of the grain boundary of the NdFeB magnet material is 98.50%; the mass ratio of C and O in the triangular area of the grain boundary is 0.48%. The mass ratio of C and O is 0.39%. The new phase R 34.22 Fe 65.64 Cu 0.06 M 0.08 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.87%.
本发明提供的钕铁硼磁体材料采用无Co的方案，同时合理控制总稀土量TRE以及Cu和M(Ti、Nb等)元素的含量范围，杂相更多地分布在二颗粒晶界，而不是团聚在晶界三角区，从而使晶界连续性提高，减少了晶界三角区的面积，有益于获得更高的致密度，从而提高了磁体剩磁Br；这也促使Tb元素均匀地分布在晶界和主相壳层，提高了磁体矫顽力Hcj。The neodymium iron boron magnet material provided by the present invention adopts a Co-free solution, while reasonably controlling the total rare earth content TRE and the content range of Cu and M (Ti, Nb, etc.) elements, the miscellaneous phases are more distributed in the grain boundary of the two particles, and It is not agglomerated in the grain boundary triangle area, so that the continuity of the grain boundary is improved, and the area of the grain boundary triangle area is reduced, which is beneficial to obtain a higher density, thereby increasing the magnet remanence Br; this also promotes the uniform distribution of Tb elements In the grain boundary and the main phase shell, the coercive force Hcj of the magnet is increased.
本发明还提供了一种如上所述的钕铁硼磁体材料在制备磁钢中的应用。The invention also provides an application of the neodymium iron boron magnet material described above in the preparation of magnetic steel.
其中，所述磁钢较佳地为54SH、54UH、56SH高性能磁钢。Among them, the magnetic steel is preferably 54SH, 54UH, 56SH high-performance magnetic steel.
在符合本领域常识的基础上，上述各优选条件，可任意组合，即得本发明各较佳实 例。On the basis of conforming to common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain preferred embodiments of the present invention.
本发明所用试剂和原料均市售可得。The reagents and raw materials used in the present invention are all commercially available.
本发明的积极进步效果在于：The positive and progressive effects of the present invention are:
(1)本发明的磁体材料的磁体性能优异，其中Br≥14.5kGs，Hcj≥24.5kOe；20-120℃Br温度系数≥-0.106％/℃；(1) The magnet material of the present invention has excellent magnet performance, wherein Br≥14.5kGs, Hcj≥24.5kOe; 20-120℃Br temperature coefficient≥-0.106%/℃;
(2)本发明的磁体材料能够用于54SH、54UH、56SH高性能磁钢的制造，由于不含Co，降低了生产成本。(2) The magnet material of the present invention can be used in the manufacture of 54SH, 54UH, and 56SH high-performance magnetic steels. Since it does not contain Co, the production cost is reduced.
附图说明Description of the drawings
图1为实施例1制得的钕铁硼磁体材料的EPMA显微照片。FIG. 1 is an EPMA photomicrograph of the neodymium iron boron magnet material prepared in Example 1. FIG.
图2为实施例1制得的钕铁硼磁体材料的EPMA图谱。2 is the EPMA spectrum of the neodymium iron boron magnet material prepared in Example 1.
具体实施方式Detailed ways
下面通过实施例的方式进一步说明本发明，但并不因此将本发明限制在所述的实施例范围之中。下列实施例中未注明具体条件的实验方法，按照常规方法和条件，或按照商品说明书选择。The present invention will be further described by way of examples below, but the present invention is not limited to the scope of the described examples. In the following examples, the experimental methods without specific conditions are selected according to conventional methods and conditions, or according to the product specification.
下述实施例中，磁性能评价所用设备为英国Hirst公司的PFM-14磁性能测量仪。In the following examples, the equipment used for the magnetic performance evaluation is the PFM-14 magnetic performance measuring instrument manufactured by Hirst, UK.
1、本发明实施例1～10和对比例1～5的钕铁硼磁体材料的原料组合物如下表1所示。1. The raw material compositions of the neodymium-iron-boron magnet materials of Examples 1 to 10 and Comparative Examples 1 to 5 of the present invention are shown in Table 1 below.
表1钕铁硼磁体材料的原料组合物的配方和含量(wt％)Table 1 The formula and content of the raw material composition of the neodymium iron boron magnet material (wt%)
Figure PCTCN2021077173-appb-000001
Figure PCTCN2021077173-appb-000001
注：“/”是指不含有该元素。Note: "/" means that the element is not contained.
实施例1-10以及对比例1-5中钕铁硼磁体材料的制备方法如下：The preparation methods of the neodymium iron boron magnet materials in Examples 1-10 and Comparative Examples 1-5 are as follows:
(1)熔炼和铸造过程：按照表1中的配方，将配制好的除R2以外的原料(实施例10的R2中Pr以PrCu形式添加，实施例2中Cu在晶界扩散步骤添加的含量为0.03wt％)放入氧化铝的坩埚中，在高频真空熔炼炉中以0.05Pa的真空和1500℃的条件进行真空熔炼。再中频真空感应速凝甩带炉中通入氩气，进行铸造，再急冷合金，得合金片。(1) Melting and casting process: According to the formula in Table 1, the prepared raw materials other than R2 (Pr in R2 of Example 10 is added in the form of PrCu, and the content of Cu added in the grain boundary diffusion step in Example 2 0.03wt%) was placed in an alumina crucible, and vacuum melting was performed in a high-frequency vacuum melting furnace with a vacuum of 0.05 Pa and a condition of 1500°C. Then, argon gas is introduced into the intermediate frequency vacuum induction rapid-solidifying belt spinning furnace to perform casting, and then the alloy is quenched to obtain alloy flakes.
(2)氢破制粉过程：在室温下将放置急冷合金的氢破用炉抽真空，而后向氢破用炉内通入纯度为99.9％的氢气，维持氢气的压力90kPa，充分吸氢后，边抽真空边升温，充分脱氢，之后进行冷却，取出氢破粉碎后的粉末。其中，吸氢的温度为室温，脱氢的温度为550℃。(2) Hydrogen breaking and powder making process: vacuum the hydrogen breaking furnace where the quench alloy is placed at room temperature, and then pass hydrogen with a purity of 99.9% into the hydrogen breaking furnace, maintain the hydrogen pressure at 90kPa, and fully absorb hydrogen. , The temperature is raised while vacuuming to fully dehydrogenate, and then cooling is performed to take out the powder after hydrogen breakage and pulverization. Among them, the temperature for hydrogen absorption is room temperature, and the temperature for dehydrogenation is 550°C.
(3)气流磨制粉过程：在氮气气氛下，在粉碎室压力为0.6MPa的条件下对氢破粉碎后的粉末进行3h的气流磨粉碎，得到细粉。(3) Airflow milling process: Under nitrogen atmosphere, the powder after hydrogen pulverization is pulverized by airflow milling for 3 hours under the condition of 0.6 MPa in the pulverizing chamber to obtain fine powder.
(4)成型过程：将经气流膜之后的粉末在1.5T以上的磁场强度中成型。(4) Molding process: the powder after passing through the air-flow film is molded in a magnetic field strength of 1.5T or more.
(5)烧结过程：将各成型体搬至烧结炉中进行烧结，烧结在低于0.5Pa的真空下，以1030-1090℃烧结2-5h，得烧结体。(5) Sintering process: each molded body is moved to a sintering furnace for sintering, sintered under a vacuum of less than 0.5 Pa, and sintered at 1030-1090°C for 2-5 hours to obtain a sintered body.
(6)晶界扩散过程：将烧结体表面净化后将R2(例如Tb的合金或氟化物、Dy的合金或氟化物和PrCu合金中的一种或多种，其中Cu在熔炼步骤和晶界扩散步骤同时添加)涂覆于烧结体的表面，并以850℃的温度扩散5-15h，之后冷却至室温，再以460-560℃的温度进行低温回火处理1-3h。(6) Grain boundary diffusion process: after the surface of the sintered body is purified, R2 (such as Tb alloy or fluoride, Dy alloy or fluoride and PrCu alloy one or more of the The diffusion step is added simultaneously) coating on the surface of the sintered body, and diffusing at a temperature of 850°C for 5-15h, then cooling to room temperature, and then performing low-temperature tempering treatment at a temperature of 460-560°C for 1-3h.
效果实施例1Effect Example 1
分别取实施例1-10以及对比例1-5中钕铁硼磁体材料，测定其磁性能和成分，FE-EPMA观察其磁体的相组成。Take the neodymium iron boron magnet materials in Examples 1-10 and Comparative Examples 1-5 to measure their magnetic properties and composition, and observe the phase composition of the magnets with FE-EPMA.
(1)钕铁硼磁体材料的各成分使用高频电感耦合等离子体发射光谱仪(ICP-OES)进行测定。下表2所示为成分检测结果。(1) Each component of the neodymium iron boron magnet material is measured using a high-frequency inductively coupled plasma emission spectrometer (ICP-OES). Table 2 below shows the component test results.
表2钕铁硼材料的组分和含量(wt％)Table 2 Composition and content of neodymium iron boron material (wt%)
Figure PCTCN2021077173-appb-000002
Figure PCTCN2021077173-appb-000002
Figure PCTCN2021077173-appb-000003
Figure PCTCN2021077173-appb-000003
注：“/”是指不含有该元素。Note: "/" means that the element is not contained.
(2)磁性能评价：钕铁硼磁体材料使用英国Hirst公司的PFM-14磁性能测量仪进行磁性能检测；下表3所示为磁性能检测结果。(2) Magnetic performance evaluation: NdFeB magnet material was tested with PFM-14 magnetic performance measuring instrument from British Hirst Company; Table 3 below shows the magnetic performance testing results.
(3)高温性能的测试：计算温度系数的公式为：
Figure PCTCN2021077173-appb-000004
计算结果如表3所示。 (3) Test of high temperature performance: The formula for calculating the temperature coefficient is:
Figure PCTCN2021077173-appb-000004
The calculation results are shown in Table 3.
(4)微观结构的测定：三角区面积、晶界连续性等测试结果如表3所示，其中新物相R xFe 100-x-y-zCu yM z(x为32～36，y为0.1以下，但不为0，z为0.15以下，但不为0)根据FE-EPMA测试得到。 (4) Measurement of microstructure: the test results of the area of the triangle area and the continuity of the grain boundary are shown in Table 3. The new phase R x Fe 100-xyz Cu y M z (x is 32～36, y is less than 0.1 , But not 0, z is below 0.15, but not 0) According to the FE-EPMA test.
表3性能测试结果Table 3 Performance test results
Figure PCTCN2021077173-appb-000005
Figure PCTCN2021077173-appb-000005
Figure PCTCN2021077173-appb-000006
Figure PCTCN2021077173-appb-000006
表3中：In Table 3:
二颗粒晶界的连续性根据EPMA的背散射图片计算得；C、O在二颗粒晶界和晶界三角区的质量占比及新物相是通过EPMA的元素分析测得。The continuity of the two-grain boundary is calculated based on EPMA's backscattering picture; the mass proportion of C and O in the two-grain boundary and the triangular area of the grain boundary and the new phase are measured by the elemental analysis of EPMA.
晶界三角区的面积占比指的是：晶界三角区的面积与“晶粒和晶界”总面积之比。The area ratio of the grain boundary triangle area refers to the ratio of the area of the grain boundary triangle area to the total area of "grains and grain boundaries".
二颗粒晶界的连续性指的是：晶界中除空洞外的物相占据的长度(物相例如为富B相、富稀土相、稀土氧化物、稀土碳化物等)与总晶界长度的比值。The continuity of the two-grain grain boundary refers to the length occupied by the phases other than voids in the grain boundary (phases such as B-rich phase, rare earth-rich phase, rare earth oxide, rare earth carbide, etc.) and the total grain boundary length Ratio.
晶界三角区中C、O的质量占比指的是：晶界三角区中C和O的质量与晶界中所有元素的总质量的比。The mass ratio of C and O in the grain boundary triangle refers to the ratio of the mass of C and O in the grain boundary triangle to the total mass of all elements in the grain boundary.
二颗粒晶界中C、O的质量占比指的是：晶界三角区中C和O的质量与晶界中所有元素的总质量的比。The mass ratio of C and O in the two-grain grain boundary refers to the ratio of the mass of C and O in the triangular area of the grain boundary to the total mass of all elements in the grain boundary.
新物相在二颗粒晶界中的面积占比(％)指的是：二颗粒晶界中新物相的面积占二颗粒晶界的总面积的比。The area ratio (%) of the new phase in the two-grain boundary refers to the ratio of the area of the new phase in the two-grain boundary to the total area of the two-grain boundary.
结果表明，剩磁温度系数均与对比例相当，甚至更好，说明本申请在不含Co时可以克服无Co带来的高温稳定性不好的缺陷。另外，根据实施例中“晶界三角区中C和O的质量占比”减去“二颗粒晶界中C和O的质量占比(％)”的差值相比对比例缩小，可得到杂相从晶界三角区迁移到二颗粒晶界的结论，这从机理上解释了晶界连续性的提升原因。The results show that the temperature coefficient of remanence is equivalent to or even better than that of the comparative example, indicating that the application can overcome the defect of poor high temperature stability caused by the absence of Co when it does not contain Co. In addition, according to the "mass ratio of C and O in the triangular area of the grain boundary" minus the "mass ratio of C and O in the two grain boundaries (%)" in the embodiment, the difference is smaller than the comparison ratio, and it can be obtained The conclusion that the impurity phase migrates from the triangular area of the grain boundary to the two-grain grain boundary explains the reason for the improvement of the continuity of the grain boundary from the mechanism.
效果实施例2Effect Example 2
如图1所示，为实施例1制得的钕铁硼磁体显微组织扫描照片，图1中，黑色块状结构为制备扫描电子显微镜观测样品时候，磨削抛光带来的富钕相脱落，使得图中出现黑色的空洞。其中点3为Nd 2Fe 14B主相(灰色区域)，点2为晶界相(银白色区域)，点1为二颗粒晶界中包括的R xFe 100-x-y-zCu yM z物相(灰白色团状物)。结果表明：晶界三角区的面积小于常规磁体。另外，图2的EPMA图谱表明“Tb元素均匀地分布在晶界和主相壳层”。 As shown in Fig. 1, it is a scanning photograph of the microstructure of the NdFeB magnet prepared in Example 1. In Fig. 1, the black block structure is the detachment of the Nd-rich phase caused by grinding and polishing when the sample is prepared for scanning electron microscope observation. , Making black holes appear in the picture. Among them, point 3 is the main phase of Nd 2 Fe 14 B (gray area), point 2 is the grain boundary phase (silver-white area), and point 1 is the R x Fe 100-xyz Cu y M z phase included in the two-grain boundary (Off-white mass). The results show that the area of the triangular area of the grain boundary is smaller than that of the conventional magnet. In addition, the EPMA spectrum of Figure 2 shows that "Tb elements are uniformly distributed in the grain boundaries and the main phase shell."

Claims (10)

  1. 一种钕铁硼磁体材料的原料组合物，其特征在于，其包括如下质量含量的组分：R：28～33wt％；A raw material composition of neodymium iron boron magnet material, characterized in that it comprises the following components by mass content: R: 28-33wt%;
    R为稀土元素，包括R1和R2，所述R1为熔炼时添加的稀土元素，所述R1包括Nd和Dy；所述R2为晶界扩散时添加的稀土元素，所述R2包括Tb，所述R2的含量为0.2wt％～1wt％；R is a rare earth element, including R1 and R2, the R1 is a rare earth element added during smelting, and the R1 includes Nd and Dy; the R2 is a rare earth element added during grain boundary diffusion, and the R2 includes Tb. The content of R2 is 0.2wt% to 1wt%;
    M：≤0.4wt％、且不为0wt％，所述M的种类包括Ti、Ni、V、Nb、Ta、Cr、Mo、W、Mn、Zr、Hf和Ag中的一种或多种；M: ≤0.4wt% and not 0wt%, the type of M includes one or more of Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf and Ag;
    Cu：≤0.15wt％、且不为0wt％；Cu: ≤0.15wt%, and not 0wt%;
    B：0.9～1.1wt％；B: 0.9～1.1wt%;
    Fe：60wt％～70.88wt％；Fe: 60wt%～70.88wt%;
    wt％为各元素含量占所述原料组合物的总质量的质量百分比；wt% is the mass percentage of the content of each element in the total mass of the raw material composition;
    所述原料组合物中不含有Co。The raw material composition does not contain Co.
  2. 如权利要求1所述的原料组合物，其特征在于，R的用量为29-31wt％；The raw material composition of claim 1, wherein the amount of R is 29-31wt%;
    和/或，所述R1中Nd的含量为28～32.5wt％，百分比为占所述原料组合物总质量的质量百分比；And/or, the content of Nd in the R1 is 28-32.5 wt%, and the percentage is the mass percentage of the total mass of the raw material composition;
    和/或，所述R1中Dy的含量在0.2wt％以下，较佳地为0.1～0.2wt％；And/or, the content of Dy in said R1 is less than 0.2wt%, preferably 0.1-0.2wt%;
    和/或，所述R1还包括Pr、Ho、Tb、Gd和Y中的一种或多种；And/or, said R1 also includes one or more of Pr, Ho, Tb, Gd and Y;
    和/或，当所述R1包含Pr时，Pr的添加形式为以PrNd的形式，或者，以纯净的Pr和Nd的混合物的形式，或者以PrNd、纯净的Pr和Nd的混合物联合添加；当以PrNd的形式添加时，Pr：Nd＝25:75或20：80；当以纯净的Pr和Nd的混合物的形式或以PrNd、纯净的Pr和Nd的混合物联合添加时，所述Pr的含量较佳地为0.1～2wt％，其中百分比为占所述原料组合物总质量的质量百分比；And/or, when the R1 contains Pr, the addition form of Pr is in the form of PrNd, or, in the form of a mixture of pure Pr and Nd, or a combination of PrNd, and a mixture of pure Pr and Nd; when When added in the form of PrNd, Pr:Nd=25:75 or 20:80; when added in the form of a mixture of pure Pr and Nd or a combination of PrNd, pure Pr and Nd, the content of Pr Preferably it is 0.1-2wt%, wherein the percentage is the mass percentage of the total mass of the raw material composition;
    其中，当所述的R1包含Ho时，所述Ho的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述原料组合物总质量的质量百分比；Wherein, when the R1 includes Ho, the content of Ho is preferably 0.1 to 0.2 wt%, and the percentage is the mass percentage of the content of each component to the total mass of the raw material composition;
    其中，当所述的R1包含Gd时，所述Gd的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述原料组合物总质量的质量百分比；Wherein, when the R1 includes Gd, the content of Gd is preferably 0.1 to 0.2 wt%, and the percentage is the mass percentage of the content of each component to the total mass of the raw material composition;
    其中，当所述的R1包含Y时，所述Y的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述原料组合物总质量的质量百分比；Wherein, when the R1 includes Y, the content of Y is preferably 0.1 to 0.2 wt%, and the percentage is the mass percentage of the content of each component to the total mass of the raw material composition;
    和/或，所述R2的含量为0.2wt％～0.8wt％；And/or, the content of R2 is 0.2wt% to 0.8wt%;
    和/或，所述R2中，Tb的含量为0.2wt％～0.8wt％；And/or, in the R2, the content of Tb is 0.2wt% to 0.8wt%;
    和/或，所述R2还包括Pr、Dy、Ho和Gd中的一种或多种；And/or, said R2 also includes one or more of Pr, Dy, Ho and Gd;
    其中，当所述的R2包含Pr时，所述Pr的含量较佳地为0.2wt％以下，且不为0wt％；Wherein, when the R2 includes Pr, the content of Pr is preferably 0.2 wt% or less, and not 0 wt%;
    其中，当所述R2包含Dy时，所述Dy的含量较佳地为0.3wt％以下，且不为0wt％；Wherein, when the R2 includes Dy, the content of Dy is preferably 0.3 wt% or less, and not 0 wt%;
    其中，当所述R2包括Ho时，所述Ho的含量较佳地为0.15wt％以下、且不为0wt％；Wherein, when the R2 includes Ho, the content of Ho is preferably 0.15 wt% or less and not 0 wt%;
    其中，当所述R2包括Gd时，所述Gd的含量较佳地为0.15wt％以下、且不为0wt％；Wherein, when the R2 includes Gd, the content of Gd is preferably 0.15 wt% or less and not 0 wt%;
    和/或，所述M的含量为0.1wt％～0.15wt％，或者0.25wt％～0.4wt％；And/or, the content of M is 0.1 wt% to 0.15 wt%, or 0.25 wt% to 0.4 wt%;
    和/或，所述M的种类为Ti、Zr、Nb、Ni、V、Ta、Cr、Mo、W、Mn、Hf和Ag中的一种或多种；And/or, the type of M is one or more of Ti, Zr, Nb, Ni, V, Ta, Cr, Mo, W, Mn, Hf and Ag;
    其中，当所述M包含Ti时，所述Ti的含量较佳地为0.05wt％～0.3wt％，更佳地为0.1wt％～0.15wt％；Wherein, when the M contains Ti, the content of Ti is preferably 0.05 wt% to 0.3 wt%, more preferably 0.1 wt% to 0.15 wt%;
    其中，当所述的M包含Nb时，所述Nb的含量较佳地为0.05wt％～0.15wt％，更佳地为0.05wt％～0.1wt％；Wherein, when the M contains Nb, the content of Nb is preferably 0.05 wt% to 0.15 wt%, more preferably 0.05 wt% to 0.1 wt%;
    和/或，所述M的种类还包括Bi、Sn、Zn、Ga、In、Au和Pb中的一种或多种；And/or, the type of M further includes one or more of Bi, Sn, Zn, Ga, In, Au and Pb;
    其中，当所述M包括Ga时，所述Ga的含量范围较佳地为0.1～0.3wt％；Wherein, when the M includes Ga, the content of the Ga is preferably in the range of 0.1 to 0.3 wt%;
    当M元素包括Ga，且Ga为0.2wt％以上、且不为0.35wt％时，较佳地，M元素的组成中Ti+Nb为0.07wt％以下、且不为0wt％；When the M element includes Ga, and Ga is 0.2 wt% or more and not 0.35 wt%, preferably, Ti+Nb in the composition of the M element is 0.07 wt% or less, and is not 0 wt%;
    和/或，较佳地，所述原料组合物中还含有Al；其含量较佳地为0.15wt％以下，但不为0wt％；And/or, preferably, the raw material composition also contains Al; its content is preferably less than 0.15wt%, but not 0wt%;
    当所述M包括Ga，且Ga为0.01wt％以下时，Al+Ga+Cu为0.15wt％以下、且不为0wt％；较佳地，Al+Ga+Cu为0.11wt％以下、且不为0wt％；When the M includes Ga, and Ga is 0.01wt% or less, Al+Ga+Cu is 0.15wt% or less and not 0wt%; preferably, Al+Ga+Cu is 0.11wt% or less and not Is 0wt%;
    和/或，所述原料组合物中Cu的含量为0.08wt％以下、但不为0wt％，或者0.1wt％～0.15wt％；And/or, the content of Cu in the raw material composition is 0.08 wt% or less, but not 0 wt%, or 0.1 wt% to 0.15 wt%;
    和/或，所述原料组合物中B的含量为0.9wt％～1.1wt％，较佳地为0.97wt％～1.05wt％；And/or, the content of B in the raw material composition is 0.9 wt% to 1.1 wt%, preferably 0.97 wt% to 1.05 wt%;
    和/或，所述原料组合物中所述Fe的含量为65.65wt％～70.88wt％。And/or, the content of Fe in the raw material composition is 65.65 wt% to 70.88 wt%.
  3. 如权利要求1或2所述的原料组合物，其特征在于，所述的原料组合物包括：The raw material composition of claim 1 or 2, wherein the raw material composition comprises:
    R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
    B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
    Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
    Ti：0.3wt％以下、但不为0wt％；Ti: 0.3wt% or less, but not 0wt%;
    余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    较佳地，所述的原料组合物包括如下组分：Preferably, the raw material composition includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％；R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%; R2 is Tb, Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Fe:68.19wt％；Fe: 68.19wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括：And/or, the raw material composition includes:
    R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
    B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
    Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
    Nb：0.3wt％以下、但不为0wt％；Nb: 0.3wt% or less, but not 0wt%;
    余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    较佳地，所述的原料组合物包括如下组分：Preferably, the raw material composition includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Nb：0.15wt％；Nb: 0.15wt%;
    Fe:68.19wt％；Fe: 68.19wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括：And/or, the raw material composition includes:
    R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
    B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
    Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
    Nb：0.3wt％以下、但不为0wt％；Nb: 0.3wt% or less, but not 0wt%;
    Ga：0.05wt％-0.3wt％；Ga: 0.05wt%-0.3wt%;
    余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    较佳地，所述的原料组合物包括如下组分：Preferably, the raw material composition includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Nb：0.05wt％；Nb: 0.05wt%;
    Ga：0.3wt％；Ga: 0.3wt%;
    Fe:67.99wt％；Fe: 67.99wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括如下组分：And/or, the raw material composition includes the following components:
    R：29wt％；其中R1为Nd和Dy，Nd为28.6wt％，Dy为0.10wt％，R2为Tb，Tb为0.30wt％；R: 29wt%; where R1 is Nd and Dy, Nd is 28.6wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.30wt%;
    B：1.01wt％；B: 1.01wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Ga：0.15wt％；Ga: 0.15wt%;
    Fe:69.62wt％；Fe: 69.62wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括如下组分：And/or, the raw material composition includes the following components:
    R：31wt％；其中R1为Nd和Dy，Nd为30.4wt％，Dy为0.10wt％，R2为Tb，Tb为0.50wt％；R: 31wt%; where R1 is Nd and Dy, Nd is 30.4wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.50wt%;
    B：0.98wt％；B: 0.98wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Ga：0.1wt％；Ga: 0.1wt%;
    Fe:67.7wt％；Fe: 67.7wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括如下组分：And/or, the raw material composition includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.9wt％，Dy为0.10wt％，R2为Tb， Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.05wt％；Ti: 0.05wt%;
    Ga：0.1wt％；Ga: 0.1wt%;
    Fe:68.19wt％；Fe: 68.19wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括如下组分：And/or, the raw material composition includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.3wt％；Ti: 0.3wt%;
    Ga：0.1wt％；Ga: 0.1wt%;
    Fe:67.94wt％；Fe: 67.94wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括如下组分：And/or, the raw material composition includes the following components:
    R：28wt％；其中R1为Nd和Dy，Nd为27.3wt％，Dy为0.10wt％，R2为Tb，Tb为0.2wt％；R: 28wt%; where R1 is Nd and Dy, Nd is 27.3wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.2wt%;
    B：1.1wt％；B: 1.1wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Nb：0.05wt％；Nb: 0.05wt%;
    Ga：0.15wt％；Ga: 0.15wt%;
    Fe:70.88wt％；Fe: 70.88wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括如下组分：And/or, the raw material composition includes the following components:
    R：33wt％；其中R1为Nd和Dy和Pr，Nd为31.7wt％，Dy为0.20wt％，Pr为0.1wt％，R2为Tb，Tb为1wt％；R: 33wt%; where R1 is Nd, Dy and Pr, Nd is 31.7wt%, Dy is 0.20wt%, Pr is 0.1wt%, R2 is Tb, and Tb is 1wt%;
    B：0.9wt％；B: 0.9wt%;
    Cu：0.15wt％；Cu: 0.15wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Al：0.15wt％；Al: 0.15wt%;
    Fe:65.65wt％；Fe: 65.65wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比；Wherein, the percentage is the mass percentage of each element in the raw material composition;
    和/或，所述的原料组合物包括如下组分：And/or, the raw material composition includes the following components:
    R：31wt％；其中R1为Nd和Dy，Nd为29.9wt％，Dy为0.10wt％，R2为Tb、Dy和Pr，其中Tb为0.5wt％，Dy为0.30wt％，Pr为0.20wt％；R: 31wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, Dy and Pr, where Tb is 0.5wt%, Dy is 0.30wt%, and Pr is 0.20wt% ；
    B：0.97wt％；B: 0.97wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Fe:67.81wt％；Fe: 67.81wt%;
    其中，所述百分比为各元素占原料组合物的质量百分比。Wherein, the percentage is the mass percentage of each element in the raw material composition.
  4. 一种钕铁硼磁体材料的制备方法，其采用如权利要求1-3任意一项所述的原料组合物进行，所述制备方法为本领域常规的扩散制法，其中，R1元素在熔炼步骤中添加，R2元素在晶界扩散步骤中添加。A preparation method of neodymium iron boron magnet material, which adopts the raw material composition according to any one of claims 1 to 3, and the preparation method is a conventional diffusion method in the art, wherein the R1 element is in the smelting step The element R2 is added in the grain boundary diffusion step.
  5. 如权利要求4所述的制备方法，其特征在于，所述制备方法包括如下步骤：将所述钕铁硼磁体材料的原料组合物中除R2以外的元素经熔炼、制粉、成型、烧结得烧结体，再将所述的烧结体与所述R2的混合物经晶界扩散即可；The preparation method according to claim 4, wherein the preparation method comprises the following steps: the elements other than R2 in the raw material composition of the neodymium iron boron magnet material are obtained by smelting, powdering, molding, and sintering Sintered body, and then diffuse the mixture of the sintered body and the R2 through the grain boundary;
    其中，所述熔炼的操作为将所述钕铁硼磁体材料中除R2以外的元素采用铸锭工艺和速凝片工艺进行熔炼浇铸，得到合金片；Wherein, the smelting operation is smelting and casting the elements other than R2 in the neodymium iron boron magnet material using an ingot process and a quick-setting sheet process to obtain an alloy sheet;
    所述熔炼的温度较佳地为1300～1700℃，更佳地为1450～1550℃；The melting temperature is preferably 1300 to 1700°C, more preferably 1450 to 1550°C;
    所述制粉较佳地包括氢破制粉和/或气流磨制粉；The pulverizing preferably includes hydrogen crushing pulverizing and/or jet milling pulverizing;
    其中，所述氢破制粉较佳地包括吸氢、脱氢和冷却处理；所述吸氢的温度较佳地为20～200℃；所述脱氢的温度较佳地为400～650℃，更佳地为500～550℃；所述吸氢的压力较佳地为50～600kPa；Wherein, the hydrogen pulverization preferably includes hydrogen absorption, dehydrogenation and cooling treatment; the temperature of hydrogen absorption is preferably 20 to 200°C; the temperature of dehydrogenation is preferably 400 to 650°C , More preferably 500-550°C; the pressure of the hydrogen absorption is preferably 50-600kPa;
    所述气流磨制粉较佳地在0.1～2MPa，更佳地在0.5～0.7MPa的条件下进行气流磨制粉；所述气流磨制粉中的气流较佳地为氮气；所述气流磨制粉的时间较佳地为2～4h；The airflow milling powder preferably performs airflow milling under the conditions of 0.1-2MPa, more preferably 0.5-0.7MPa; the airflow in the airflow milling powder is preferably nitrogen; the airflow mill The milling time is preferably 2 to 4 hours;
    其中，所述成型较佳地为磁场成型法，所述的磁场成型法的磁场强度为1.5T以上；Wherein, the molding is preferably a magnetic field molding method, and the magnetic field strength of the magnetic field molding method is 1.5T or more;
    所述烧结较佳地在真空度低于5×10 -1Pa的条件下进行； The sintering is preferably carried out under the condition that the vacuum degree is lower than 5×10 -1 Pa;
    所述烧结的温度较佳地为1000～1200℃，更佳地为1030-1090℃；The sintering temperature is preferably 1000-1200°C, more preferably 1030-1090°C;
    所述烧结的时间较佳地为0.5～10h，更佳地为2-5h；The sintering time is preferably 0.5-10h, more preferably 2-5h;
    在所述的晶界扩散之前较佳地还包括所述R2的涂覆操作；Preferably, the coating operation of the R2 is further included before the grain boundary diffusion;
    其中，所述R2较佳地以氟化物或低熔点合金的形式涂覆，例如Tb的氟化物；当还包含Dy时，较佳地，Dy以Dy的氟化物的形式涂覆；当还包含Pr时，较佳地，Pr以PrCu合金的形式添加；Wherein, the R2 is preferably coated in the form of fluoride or low melting point alloy, such as Tb fluoride; when Dy is also included, preferably, Dy is coated in the form of Dy fluoride; when it also contains In the case of Pr, preferably, Pr is added in the form of PrCu alloy;
    当所述R2包含Pr且Pr以PrCu合金的形式参与晶界扩散时，较佳地，Cu在所述制备方法中的添加时机为晶界扩散步骤，或者在熔炼步骤和晶界扩散步骤同时添加；当所述Cu在晶界扩散时添加，所述Cu的含量较佳地为0.03～0.15wt％，wt％为元素占所述原料组合物的质量百分比；其中所述Cu占所述PrCu的百分比为0.1～17wt％；When the R2 contains Pr and Pr participates in the grain boundary diffusion in the form of a PrCu alloy, preferably, the timing of Cu addition in the preparation method is the grain boundary diffusion step, or the smelting step and the grain boundary diffusion step are added at the same time When the Cu is added during the grain boundary diffusion, the content of Cu is preferably 0.03 to 0.15 wt%, and wt% is the mass percentage of the element in the raw material composition; wherein the Cu accounts for the PrCu The percentage is 0.1-17wt%;
    所述晶界扩散的温度较佳地为800～1000℃；The temperature of the grain boundary diffusion is preferably 800-1000°C;
    所述晶界扩散的时间较佳地为5～20h，更佳地为5-15h；The time for the grain boundary diffusion is preferably 5-20h, more preferably 5-15h;
    所述晶界扩散之后，较佳地还进行低温回火处理；低温回火处理的温度较佳地为460-560℃，时间较佳地为1-3h。After the grain boundary diffuses, it is preferable to perform low-temperature tempering treatment; the temperature of the low-temperature tempering treatment is preferably 460-560°C, and the time is preferably 1-3h.
  6. 一种由如权利要求4或5的制备方法制得的钕铁硼磁体材料。A neodymium iron boron magnet material prepared by the preparation method according to claim 4 or 5.
  7. 一种钕铁硼磁体材料，其特征在于，所述钕铁硼磁体材料中，R：28～33wt％；所述R包括R1和R2，所述R1包括Nd和Dy，所述R2包括Tb；R2的含量为0.2wt％～1wt％；A neodymium iron boron magnet material, characterized in that, in the neodymium iron boron magnet material, R: 28-33wt%; said R includes R1 and R2, said R1 includes Nd and Dy, and said R2 includes Tb; The content of R2 is 0.2wt% to 1wt%;
    B：0.9～1.1wt％；B: 0.9～1.1wt%;
    Cu：0.15wt％以下、且不为0wt％；Cu: 0.15wt% or less and not 0wt%;
    M：0.35wt％以下、且不为0wt％；M: 0.35wt% or less and not 0wt%;
    M包括Ti、Ni、V、Nb、Ta、Cr、Mo、W、Mn、Zr、Hf、Zn和Ag中的一种或多种；M includes one or more of Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn and Ag;
    Fe：60wt％～70.88wt％；Fe: 60wt%～70.88wt%;
    wt％为各元素占所述钕铁硼磁体材料的质量百分比；wt% is the mass percentage of each element in the neodymium iron boron magnet material;
    所述钕铁硼磁体材料中不含Co；The neodymium iron boron magnet material does not contain Co;
    所述钕铁硼磁体材料包含Nd 2Fe l4B晶粒和其壳层、邻接所述Nd 2Fe l4B晶粒的二颗粒晶界和晶界三角区，其中R1中的重稀土元素主要分布在Nd 2Fe l4B晶粒，R2主要分布在所述壳层、所述二颗粒晶界和所述晶界三角区，所述晶界三角区的面积占比为1.5％～3.5％；所述钕铁硼磁体材料的晶界连续性为96％以上；晶界三角区中C和O的质量占比为0.4～0.5％，二颗粒晶界中C和O的质量占比为0.35％以上。 The neodymium iron boron magnet material comprises Nd 2 Fe l4 B crystal grains and its shell layer, two grain boundaries adjacent to the Nd 2 Fe l4 B crystal grains and a grain boundary triangle region, wherein the heavy rare earth elements in R1 are mainly distributed In the Nd 2 Fe 14 B crystal grains, R2 is mainly distributed in the shell layer, the two-grain boundary and the grain boundary triangle area, and the area of the grain boundary triangle area accounts for 1.5% to 3.5%; The continuity of the grain boundary of the neodymium iron boron magnet material is more than 96%; the mass ratio of C and O in the triangular area of the grain boundary is 0.4-0.5%, and the mass ratio of C and O in the two-grain grain boundary is more than 0.35% .
  8. 如权利要求7所述的钕铁硼磁体材料，其特征在于，所述晶界三角区面积占比为1.59％～3.28％，较佳地为1.59％～2％；8. The neodymium iron boron magnet material of claim 7, wherein the area of the triangular area of the grain boundary accounts for 1.59% to 3.28%, preferably 1.59% to 2%;
    和/或，所述晶界连续性为97％以上，较佳地为98％以上；And/or, the grain boundary continuity is 97% or more, preferably 98% or more;
    和/或，所述二颗粒晶界中C和O的质量占比较佳地为0.37％～0.4％；And/or, the mass of C and O in the two-grain boundary is preferably 0.37% to 0.4%;
    和/或，所述二颗粒晶界中还含有化学组成为R xFe 100-x-y-zCu yM z的物相；其中R包括Nd、Dy和Tb中的一种或多种，M包括Ti、Ni、V、Nb、Ta、Cr、Mo、W、Mn、Zr、Hf、Zn和Ag中的一种或多种，x为32～36，y为0.1以下，但不为0，z为0.15以下，但不为0；其中，x优选为32.5～35.5，y优选为0.02～0.1，z优选为0.07～0.12； And/or, the two-grain boundary also contains a phase with a chemical composition of R x Fe 100-xyz Cu y M z ; wherein R includes one or more of Nd, Dy and Tb, and M includes Ti, One or more of Ni, V, Nb, Ta, Cr, Mo, W, Mn, Zr, Hf, Zn and Ag, x is 32～36, y is less than 0.1, but not 0, z is 0.15 Below, but not 0; wherein, x is preferably 32.5 to 35.5, y is preferably 0.02 to 0.1, and z is preferably 0.07 to 0.12;
    所述化学组成为R xFe 100-x-y-zCu yM z的新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比较佳地为0.8～3％，更佳地为0.81～2.64％； The area of the new phase of the chemical composition of R x Fe 100-xyz Cu y M z in the two-grain boundary and the total area of the two-grain boundary is preferably 0.8-3%, more preferably The land is 0.81～2.64%;
    和/或，所述钕铁硼磁体材料中R的用量较佳地为29-31wt％；And/or, the amount of R in the neodymium iron boron magnet material is preferably 29-31wt%;
    和/或，所述钕铁硼磁体材料中，所述R中Nd的含量为28～32.5wt％，百分比为占所述钕铁硼磁体材料总质量的质量百分比；And/or, in the neodymium iron boron magnet material, the content of Nd in the R is 28-32.5 wt%, and the percentage is a mass percentage of the total mass of the neodymium iron boron magnet material;
    和/或，所述钕铁硼磁体材料中，所述R1中Dy的含量在0.2wt％以下，较佳地为0.1～0.2wt％；And/or, in the neodymium iron boron magnet material, the content of Dy in the R1 is less than 0.2 wt%, preferably 0.1 to 0.2 wt%;
    和/或，所述R1还包括Pr、Ho、Tb、Gd和Y中的一种或多种；And/or, said R1 also includes one or more of Pr, Ho, Tb, Gd and Y;
    和/或，当所述R1包含Pr时，Pr的添加形式为以PrNd的形式，或者，以纯净的Pr和Nd的混合物的形式，或者以PrNd、纯净的Pr和Nd的混合物联合添加；当以PrNd的形式添加时，Pr：Nd＝25:75或20：80；当以纯净的Pr和Nd的混合物的形式或以PrNd、纯净的Pr和Nd的混合物联合添加时，所述Pr的含量较佳地为0.1～2wt％，其中百分比为占所述钕铁硼磁体材料总质量的质量百分比；And/or, when the R1 contains Pr, the addition form of Pr is in the form of PrNd, or in the form of a mixture of pure Pr and Nd, or a combined addition of PrNd and a mixture of pure Pr and Nd; when When added in the form of PrNd, Pr:Nd=25:75 or 20:80; when added in the form of a mixture of pure Pr and Nd or a combination of PrNd, pure Pr and Nd, the content of Pr Preferably, it is 0.1-2wt%, wherein the percentage is the mass percentage of the total mass of the neodymium iron boron magnet material;
    其中，当所述的R1包含Ho时，所述Ho的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述钕铁硼磁体材料总质量的质量百分比；Wherein, when the R1 includes Ho, the content of Ho is preferably 0.1 to 0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material;
    其中，当所述的R1包含Gd时，所述Gd的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述钕铁硼磁体材料总质量的质量百分比；Wherein, when the R1 includes Gd, the content of Gd is preferably 0.1 to 0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material;
    其中，当所述的R1包含Y时，所述Y的含量较佳地为0.1～0.2wt％，百分比为各组分含量占所述钕铁硼磁体材料总质量的质量百分比；Wherein, when the R1 includes Y, the content of Y is preferably 0.1 to 0.2 wt%, and the percentage is the mass percentage of the content of each component in the total mass of the neodymium iron boron magnet material;
    和/或，所述R2的含量为0.2wt％～0.8wt％；And/or, the content of R2 is 0.2wt% to 0.8wt%;
    和/或，所述R2中，Tb的含量为0.2wt％～0.8wt％；And/or, in the R2, the content of Tb is 0.2wt% to 0.8wt%;
    和/或，，所述R2还包括Pr、Dy、Ho和Gd中的一种或多种；And/or, said R2 also includes one or more of Pr, Dy, Ho and Gd;
    其中，当所述的R2包含Pr时，所述Pr的含量较佳地为0.2wt％以下，且不为0wt％；Wherein, when the R2 includes Pr, the content of Pr is preferably 0.2 wt% or less, and not 0 wt%;
    其中，当所述R2包含Dy时，所述Dy的含量较佳地为0.3wt％以下，且不为0wt％；Wherein, when the R2 includes Dy, the content of Dy is preferably 0.3 wt% or less, and not 0 wt%;
    其中，当所述R2包括Ho时，所述Ho的含量较佳地为0.15wt％以下、且不为0wt％，wt％为元素占所述钕铁硼磁体材料的质量百分比；Wherein, when the R2 includes Ho, the content of Ho is preferably 0.15 wt% or less and not 0 wt%, and wt% is the mass percentage of the element in the neodymium iron boron magnet material;
    其中，当所述R2包括Gd时，所述Gd的含量较佳地为0.15wt％以下、且不为0wt％，wt％为元素占所述钕铁硼磁体材料的质量百分比；Wherein, when the R2 includes Gd, the content of Gd is preferably less than 0.15 wt% and not 0 wt%, and wt% is the mass percentage of the element in the neodymium iron boron magnet material;
    和/或，所述M的含量为0.1wt％～0.15wt％，或者0.25wt％～0.4wt％；And/or, the content of M is 0.1 wt% to 0.15 wt%, or 0.25 wt% to 0.4 wt%;
    和/或，所述M的种类为Ti、Zr、Nb、Ni、V、Ta、Cr、Mo、W、Mn、Hf和Ag中的一种或多种；And/or, the type of M is one or more of Ti, Zr, Nb, Ni, V, Ta, Cr, Mo, W, Mn, Hf and Ag;
    其中，当所述M包含Ti时，所述Ti的含量较佳地为0.05wt％～0.3wt％，更佳地为0.1wt％～0.15wt％；Wherein, when the M contains Ti, the content of Ti is preferably 0.05 wt% to 0.3 wt%, more preferably 0.1 wt% to 0.15 wt%;
    其中，当所述的M包含Nb时，所述Nb的含量较佳地为0.05wt％～0.15wt％，更佳地为0.05wt％～0.1wt％；Wherein, when the M contains Nb, the content of Nb is preferably 0.05 wt% to 0.15 wt%, more preferably 0.05 wt% to 0.1 wt%;
    和/或，所述M的种类还包括Bi、Sn、Zn、Ga、In、Au和Pb中的一种或多种；And/or, the type of M further includes one or more of Bi, Sn, Zn, Ga, In, Au and Pb;
    其中，当所述M包括Ga时，所述Ga的含量范围较佳地为0.1～0.3wt％；Wherein, when the M includes Ga, the content of the Ga is preferably in the range of 0.1 to 0.3 wt%;
    当M元素包括Ga，且Ga为0.2wt％以上、且不为0.35wt％时，较佳地，M元素的组成中Ti+Nb为0.07wt％以下、且不为0wt％；When the M element includes Ga, and Ga is 0.2 wt% or more and not 0.35 wt%, preferably, Ti+Nb in the composition of the M element is 0.07 wt% or less, and is not 0 wt%;
    和/或，较佳地，所述钕铁硼磁体材料中还含有Al；其含量较佳地为0.15wt％以下，但不为0wt％；And/or, preferably, the neodymium iron boron magnet material also contains Al; its content is preferably less than 0.15 wt%, but not 0 wt%;
    当所述M包括Ga，且Ga为0.01wt％以下时，Al+Ga+Cu为0.15wt％以下、且不为0wt％；较佳地，Al+Ga+Cu为0.11wt％以下、且不为0wt％；When the M includes Ga, and Ga is 0.01wt% or less, Al+Ga+Cu is 0.15wt% or less and not 0wt%; preferably, Al+Ga+Cu is 0.11wt% or less and not Is 0wt%;
    和/或，所述钕铁硼磁体材料中Cu的含量为0.08wt％以下、但不为0wt％，或者0.1wt％～0.15wt％；And/or, the content of Cu in the neodymium iron boron magnet material is 0.08 wt% or less, but not 0 wt%, or 0.1 wt% to 0.15 wt%;
    和/或，所述钕铁硼磁体材料中B的含量为0.9wt％～1.1wt％，较佳地为0.97wt％～1.05wt％；And/or, the content of B in the neodymium iron boron magnet material is 0.9 wt% to 1.1 wt%, preferably 0.97 wt% to 1.05 wt%;
    和/或，所述钕铁硼磁体材料中所述Fe的含量为65.65wt％～70.88wt％。And/or, the content of Fe in the neodymium iron boron magnet material is 65.65 wt% to 70.88 wt%.
  9. 如权利要求8所述的钕铁硼磁体材料，其特征在于，所述的钕铁硼磁体材料包括：The neodymium iron boron magnet material of claim 8, wherein the neodymium iron boron magnet material comprises:
    R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
    B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
    Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
    Ti：0.3wt％以下、但不为0wt％；Ti: 0.3wt% or less, but not 0wt%;
    余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    较佳地，所述的钕铁硼磁体材料包括如下组分：Preferably, the neodymium iron boron magnet material includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％；R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%; R2 is Tb, Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Fe:68.19wt％；Fe: 68.19wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为2.34％；所述钕铁硼磁体材料的晶界连续性为98％；晶界三角区中C和O的质量占比为0.45％，二颗粒晶界中C和O的质量占比为0.39％；二颗粒晶界中检测到新物相R 34.5Fe 65.4Cu 0.03M 0.07，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为2.35％； The area of the triangular area of the grain boundary accounts for 2.34%; the continuity of the grain boundary of the NdFeB magnet material is 98%; the mass ratio of C and O in the triangular area of the grain boundary is 0.45%. The mass ratio of C and O is 0.39%; the new phase R 34.5 Fe 65.4 Cu 0.03 M 0.07 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 2.35%;
    和/或，所述的钕铁硼磁体材料包括：And/or, the neodymium iron boron magnet material includes:
    R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
    B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
    Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
    Nb：0.3wt％以下、但不为0wt％；Nb: 0.3wt% or less, but not 0wt%;
    余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    较佳地，所述的钕铁硼磁体材料包括如下组分：Preferably, the neodymium iron boron magnet material includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Nb：0.15wt％；Nb: 0.15wt%;
    Fe:68.19wt％；Fe: 68.19wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为2.36％；所述钕铁硼磁体材料的晶界连续性为98.41％；晶界三角区中C和O的质量占比为0.41％，二颗粒晶界中C和O的质量占比为0.38％；二颗粒晶界中检测到新物相R 35.26Fe 64.58Cu 0.07M 0.09，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.12％； The area of the grain boundary triangle area accounts for 2.36%; the grain boundary continuity of the neodymium iron boron magnet material is 98.41%; the mass ratio of C and O in the grain boundary triangle area is 0.41%. The mass ratio of C and O is 0.38%; a new phase R 35.26 Fe 64.58 Cu 0.07 M 0.09 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.12%;
    和/或，所述的钕铁硼磁体材料包括：And/or, the neodymium iron boron magnet material includes:
    R：29-31wt％；所述R1包括Nd和Dy，其中Dy的用量为0.1wt％-0.2wt％；R2包括Tb，Tb的用量为0.2wt％-0.8wt％；R: 29-31wt%; said R1 includes Nd and Dy, wherein the amount of Dy is 0.1wt%-0.2wt%; R2 includes Tb, and the amount of Tb is 0.2wt%-0.8wt%;
    B：0.9wt％～1.1wt％；B: 0.9wt%～1.1wt%;
    Cu：0.15wt％以下、但不为0wt％；Cu: 0.15wt% or less, but not 0wt%;
    Nb：0.3wt％以下、但不为0wt％；Nb: 0.3wt% or less, but not 0wt%;
    Ga：0.05wt％-0.3wt％；Ga: 0.05wt%-0.3wt%;
    余量为Fe及不可避免的杂质；The balance is Fe and unavoidable impurities;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    较佳地，所述的钕铁硼磁体材料包括如下组分：Preferably, the neodymium iron boron magnet material includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Nb：0.05wt％；Nb: 0.05wt%;
    Ga：0.3wt％；Ga: 0.3wt%;
    Fe:67.99wt％；Fe: 67.99wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为2.45％；所述钕铁硼磁体材料的晶界连续性为98.80％；晶界三角区中C和O的质量占比为0.45％，二颗粒晶界中C和O的质量占比为0.39％，二颗粒晶界中检测到新物相R 35.50Fe 64.38Cu 0.04M 0.08，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为2.03％； The area of the grain boundary triangle area accounts for 2.45%; the grain boundary continuity of the neodymium iron boron magnet material is 98.80%; the mass ratio of C and O in the grain boundary triangle area is 0.45%. The mass ratio of C and O is 0.39%, the new phase R 35.50 Fe 64.38 Cu 0.04 M 0.08 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 2.03%;
    和/或，所述的钕铁硼磁体材料包括如下组分：And/or, the neodymium iron boron magnet material includes the following components:
    R：29wt％；其中R1为Nd和Dy，Nd为28.6wt％，Dy为0.10wt％，R2为Tb，Tb为0.30wt％；R: 29wt%; where R1 is Nd and Dy, Nd is 28.6wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.30wt%;
    B：1.01wt％；B: 1.01wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Ga：0.15wt％；Ga: 0.15wt%;
    Fe:69.62wt％；Fe: 69.62wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为1.88％；所述钕铁硼磁体材料的晶界连续性为97.20％；晶界三角区中C和O的质量占比为0.44％，二颗粒晶界中C和O的质量占比为0.38％，二颗粒晶界中检测到新物相R 34.1Fe 65.68Cu 0.1M 0.12，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.74％； The area of the grain boundary triangle area accounts for 1.88%; the grain boundary continuity of the neodymium iron boron magnet material is 97.20%; the mass ratio of C and O in the grain boundary triangle area is 0.44%. The mass ratio of C and O is 0.38%. A new phase R 34.1 Fe 65.68 Cu 0.1 M 0.12 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.74%;
    和/或，所述的钕铁硼磁体材料包括如下组分：And/or, the neodymium iron boron magnet material includes the following components:
    R：31wt％；其中R1为Nd和Dy，Nd为30.4wt％，Dy为0.10wt％，R2为Tb，Tb为0.50wt％；R: 31wt%; where R1 is Nd and Dy, Nd is 30.4wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.50wt%;
    B：0.98wt％；B: 0.98wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Ga：0.1wt％；Ga: 0.1wt%;
    Fe:67.7wt％；Fe: 67.7wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为2.68％；所述钕铁硼磁体材料的晶界连续性为98.36％；晶界三角区中C和O的质量占比为0.45％，二颗粒晶界中C和O的质量占比为0.39％，二颗粒晶界中检测到新物相R 33.2Fe 66.68Cu 0.04M 0.08，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.94％； The area of the triangular area of the grain boundary accounts for 2.68%; the continuity of the grain boundary of the NdFeB magnet material is 98.36%; the mass ratio of C and O in the triangular area of the grain boundary is 0.45%. The mass ratio of C and O is 0.39%. A new phase R 33.2 Fe 66.68 Cu 0.04 M 0.08 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.94%;
    和/或，所述的钕铁硼磁体材料包括如下组分：And/or, the neodymium iron boron magnet material includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.9wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.05wt％；Ti: 0.05wt%;
    Ga：0.1wt％；Ga: 0.1wt%;
    Fe:68.19wt％；Fe: 68.19wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为2.38％；所述钕铁硼磁体材料的晶界连续性为98.10％；晶界三角区中C和O的质量占比为0.44％，二颗粒晶界中C和O的质量占比为0.4％，二颗粒晶界中检测到新物相R 33.56Fe 66.28Cu 0.05M 0.11，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为0.81％； The area of the grain boundary triangle area accounts for 2.38%; the grain boundary continuity of the neodymium iron boron magnet material is 98.10%; the mass ratio of C and O in the grain boundary triangle area is 0.44%. The mass ratio of C and O is 0.4%. A new phase R 33.56 Fe 66.28 Cu 0.05 M 0.11 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 0.81%;
    和/或，所述的钕铁硼磁体材料包括如下组分：And/or, the neodymium iron boron magnet material includes the following components:
    R：30.6wt％；其中R1为Nd和Dy，Nd为29.90wt％，Dy为0.10wt％，R2为Tb，Tb为0.60wt％；R: 30.6wt%; where R1 is Nd and Dy, Nd is 29.90wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.60wt%;
    B：0.99wt％；B: 0.99wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.3wt％；Ti: 0.3wt%;
    Ga：0.1wt％；Ga: 0.1wt%;
    Fe:67.94wt％；Fe: 67.94wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为2.54％；所述钕铁硼磁体材料的晶界连续性为98.22％；晶界三角区中C和O的质量占比为0.43％，二颗粒晶界中C和O的质量占比为0.4％，二颗粒晶界中检测到新物相R 34.41Fe 65.42Cu 0.08M 0.09，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为2.64％； The area of the grain boundary triangle area accounts for 2.54%; the grain boundary continuity of the neodymium iron boron magnet material is 98.22%; the mass ratio of C and O in the grain boundary triangle area is 0.43%. The mass ratio of C and O is 0.4%, the new phase R 34.41 Fe 65.42 Cu 0.08 M 0.09 is detected in the two-grain boundary, and the area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 2.64%;
    和/或，所述的钕铁硼磁体材料包括如下组分：And/or, the neodymium iron boron magnet material includes the following components:
    R：28wt％；其中R1为Nd和Dy，Nd为27.3wt％，Dy为0.10wt％，R2为Tb，Tb为0.2wt％；R: 28wt%; where R1 is Nd and Dy, Nd is 27.3wt%, Dy is 0.10wt%, R2 is Tb, and Tb is 0.2wt%;
    B：1.1wt％；B: 1.1wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Nb：0.05wt％；Nb: 0.05wt%;
    Ga：0.15wt％；Ga: 0.15wt%;
    Fe:70.88wt％；Fe: 70.88wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为1.59％；所述钕铁硼磁体材料的晶界连续性为97.01％；晶界三晶界三角区中C和O的质量占比为0.46％，二颗粒晶界中C和O的质量占比为0.38％，二颗粒晶界中检测到新物相R 32.50Fe 67.39Cu 0.03M 0.08，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.06％； The area of the grain boundary triangle area accounts for 1.59%; the grain boundary continuity of the neodymium iron boron magnet material is 97.01%; the mass ratio of C and O in the grain boundary triangle area of the three grain boundaries is 0.46%, and the two particles The mass ratio of C and O in the grain boundary is 0.38%. A new phase R 32.50 Fe 67.39 Cu 0.03 M 0.08 is detected in the two grain boundaries. The ratio of the total area of grain boundaries is 1.06%;
    和/或，所述的钕铁硼磁体材料包括如下组分：And/or, the neodymium iron boron magnet material includes the following components:
    R：33wt％；其中R1为Nd和Dy和Pr，Nd为31.7wt％，Dy为0.20wt％，Pr为0.1wt％，R2为Tb，Tb为1wt％；R: 33wt%; where R1 is Nd, Dy and Pr, Nd is 31.7wt%, Dy is 0.20wt%, Pr is 0.1wt%, R2 is Tb, and Tb is 1wt%;
    B：0.9wt％；B: 0.9wt%;
    Cu：0.15wt％；Cu: 0.15wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Al：0.15wt％；Al: 0.15wt%;
    Fe:65.65wt％；Fe: 65.65wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为3.28％；所述钕铁硼磁体材料的晶界连续性为99.50％；晶界三角区中C和O的质量占比为0.46％，二颗粒晶界中C和O的质量占比为0.37％，二颗粒晶界中检测到新物相R 33.33Fe 66.58Cu 0.02M 0.07，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.58％； The area of the triangular area of the grain boundary accounts for 3.28%; the continuity of the grain boundary of the neodymium iron boron magnet material is 99.50%; the mass ratio of C and O in the triangular area of the grain boundary is 0.46%. The mass ratio of C and O is 0.37%. A new phase R 33.33 Fe 66.58 Cu 0.02 M 0.07 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.58%;
    和/或，所述的钕铁硼磁体材料包括如下组分：And/or, the neodymium iron boron magnet material includes the following components:
    R：31wt％；其中R1为Nd和Dy，Nd为29.9wt％，Dy为0.10wt％，R2为Tb、Dy和Pr，其中Tb为0.5wt％，Dy为0.30wt％，Pr为0.20wt％；R: 31wt%; where R1 is Nd and Dy, Nd is 29.9wt%, Dy is 0.10wt%, R2 is Tb, Dy and Pr, where Tb is 0.5wt%, Dy is 0.30wt%, and Pr is 0.20wt% ；
    B：0.97wt％；B: 0.97wt%;
    Cu：0.07wt％；Cu: 0.07wt%;
    Ti：0.15wt％；Ti: 0.15wt%;
    Fe:67.81wt％；Fe: 67.81wt%;
    其中，所述百分比为各元素占钕铁硼磁体材料的质量百分比；Wherein, the percentage is the mass percentage of each element in the neodymium iron boron magnet material;
    所述晶界三角区面积占比为2.62％；所述钕铁硼磁体材料的晶界连续性为98.50％；晶界三角区中C和O的质量占比为0.48％，二颗粒晶界中C和O的质量占比为0.39％，二颗粒晶界中检测到新物相R 34.22Fe 65.64Cu 0.06M 0.08，新物相在所述二颗粒晶界中的面积与所述二颗粒晶界总面积的比为1.87％。 The area of the triangular area of the grain boundary accounts for 2.62%; the continuity of the grain boundary of the NdFeB magnet material is 98.50%; the mass ratio of C and O in the triangular area of the grain boundary is 0.48%. The mass ratio of C and O is 0.39%. The new phase R 34.22 Fe 65.64 Cu 0.06 M 0.08 is detected in the two-grain boundary. The area of the new phase in the two-grain boundary is the same as the two-grain boundary The ratio of the total area is 1.87%.
  10. 一种如权利要求6-9任意一项所述的钕铁硼磁体材料在制备磁钢中的应用；所述磁钢较佳地为54SH、54UH、56SH高性能磁钢。An application of the neodymium iron boron magnet material according to any one of claims 6-9 in the preparation of magnetic steel; the magnetic steel is preferably 54SH, 54UH, 56SH high-performance magnetic steel.
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