CN106024249A - High-stability magnetic material and preparation method thereof - Google Patents
High-stability magnetic material and preparation method thereof Download PDFInfo
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- CN106024249A CN106024249A CN201610622954.5A CN201610622954A CN106024249A CN 106024249 A CN106024249 A CN 106024249A CN 201610622954 A CN201610622954 A CN 201610622954A CN 106024249 A CN106024249 A CN 106024249A
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- magnetic material
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- neodymium
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Abstract
The invention discloses a high-stability magnetic material and a preparation method thereof. The high-stability magnetic material is prepared from the following components in percentage by weight: 28 percent of neodymium, 1 percent of boric, 2 percent of dysprosium, 1 percent of praseodymium, 2 percent of gadolinium, 2 percent of zirconium, 1 percent of niobium, 3 percent of copper and the balance of iron. The preparation method of the high-stability magnetic material comprises the following steps: burdening, smelting, hydrogen decrepitation, powder preparation, forming and sintering. According to the high-stability magnetic material and the preparation method thereof, the proportions of all the elements in a neodymium iron boron magnetic material are re-optimized, and zirconium and niobium are added; a research shows that by the compound adding of zirconium and niobium, crystalline grains can be refined, so that the coercivity of a magnetic body is improved, the coupling action between a hard magnetic phase and a soft magnetic phase can be enhanced, and the comprehensive magnetic performance of the magnetic material is improved.
Description
Technical field
The present invention relates to a kind of high stability magnetic material and preparation method thereof.
Background technology
Research and the applicating history of permanent magnet material are of long standing and well established, and ancient Chinese had the most once manufactured " compass in ancient China " in order to take one's bearings with permanent magnet.After entering Industrial Revolution in modern age, permanent magnet material goes through the developmental stage such as magnet steel, permanent-magnet ferrite, AlNiCo alloy, SmCo series alloy, NdFeB permanent magnet.At present, the rare earth permanent-magnetic material with NdFeB as representative is the permanent magnet material that magnetic property is the highest, most widely used.NdFeB based permanent magnet, from finding so far, has the history in more than 20 years, has had been enter into the stage of large-scale industrial production at present, but the research work for Nd Fe B alloys never stops.Many scholars and research team all spend a lot of energy to explore and study the improvement of Nd Fe B alloys magnetic property, including improving its heat stability, corrosion resistance, machinability and ageing.It is true that the magnetic property of Sintered NdFeB based permanent magnet need to improve.In the PRODUCTION TRAITS of sintered NdFeB, it is one of effective approach that interpolation alloying element improves the magnetic property of magnet.If Chinese Patent Application No. is 201510490800.0 to disclose a kind of neodymium-iron-boron magnetic material and preparation method, the composition percentage by weight of described neodymium-iron-boron magnetic material be LREE be 29～30%, heavy rare earth element is 4～5%, Al is 1～2%, and Cu is 1～2%, and Co is 2～3%, B is 0.3～0.5%, surplus is Fe, two or more during wherein LREE is La, Ce, Pr, Nd, Sm, Gd, and heavy rare earth element is two or more in Tb, Dy, Ho, Er, Y.
Summary of the invention
It is an object of the invention to provide high stability magnetic material of a kind of new formula new proportioning content and preparation method thereof.The present invention, by adjusting the proportioning of each element in high stability magnetic material and adding new element, improves structure, thus obtains the more stable excellent magnetic material of properties.
To achieve these goals, present invention employs techniques below scheme:
A kind of high stability magnetic material, it consists of the following components in percentage by weight: neodymium 28%, boron 1%, dysprosium 2%, praseodymium 1%, gadolinium 2%, zirconium 2%, niobium 1%, copper 3%, surplus are ferrum.
A kind of method preparing above-mentioned high stability magnetic material, comprises the following steps:
Step one dispensing, weighs raw material according to the content proportioning of component each in high stability magnetic material；
Step 2 melting, first by neodymium, praseodymium in 1100 DEG C of fusings, is subsequently adding dysprosium, gadolinium, copper in 1500 DEG C of fusings, adds boron, zirconium, niobium, ferrum in 2000 DEG C of fusings, and after then the said components of all fusings being sufficiently mixed, casting is cooled to neodymium iron boron block；
Step 3 hydrogen is broken, and neodymium iron boron block is put into hydrogen crushing device, and prepared granularity is 0.5mm particles below；
Step 4 powder process, carries out airflow milling powder by broken for hydrogen good granule, and powder size reaches below 1 μm；
Step 5 molding, mixes above-mentioned powder in batch mixer more than 2 hours, is pressed into blank with mould in the environment of stationary magnetic field；
Step 6 sinters, and by blank pre-burning 2 hours under 500 DEG C of vacuum conditions, sinters 4 hours in 1200 DEG C in placing into vacuum drying oven, after being then tempered to 800 DEG C of insulations 2 hours, is incubated 2 hours then at 400 DEG C, i.e. can get high stability magnetic material finished product.
Advantages of the present invention:
In the present invention, the proportioning content of each element in inventor's re-optimization neodymium-iron-boron magnetic material, and newly added zirconium, niobium element；Showing according to the study, the compound addition of zirconium and niobium with crystal grain thinning, can improve the coercivity of magnet, can strengthen the coupling between Hard Magnetic phase and soft magnetism phase, strengthen the comprehensive magnetic energy of magnetic material.Niobium, as addition element, can effectively expand the operating temperature range of neodymium iron boron magnetic body, also reduces the irreversible loss of magnetic flux under higher temperature, improves the temperature stability of magnet.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described.
Embodiment:
A kind of high stability magnetic material, it consists of the following components in percentage by weight: neodymium 28%, boron 1%, dysprosium 2%, praseodymium 1%, gadolinium 2%, zirconium 2%, niobium 1%, copper 3%, surplus are ferrum.
The preparation method of above-mentioned high stability magnetic material, comprises the following steps:
Step one dispensing, weighs raw material according to the content proportioning of component each in high stability magnetic material；
Step 2 melting, first by neodymium, praseodymium in 1100 DEG C of fusings, is subsequently adding dysprosium, gadolinium, copper in 1500 DEG C of fusings, adds boron, zirconium, niobium, ferrum in 2000 DEG C of fusings, and after then the said components of all fusings being sufficiently mixed, casting is cooled to neodymium iron boron block；
Step 3 hydrogen is broken, and neodymium iron boron block is put into hydrogen crushing device, and prepared granularity is 0.5mm particles below；
Step 4 powder process, carries out airflow milling powder by broken for hydrogen good granule, and powder size reaches below 1 μm；
Step 5 molding, mixes above-mentioned powder in batch mixer more than 2 hours, is pressed into blank with mould in the environment of stationary magnetic field；
Step 6 sinters, and by blank pre-burning 2 hours under 500 DEG C of vacuum conditions, sinters 4 hours in 1200 DEG C in placing into vacuum drying oven, after being then tempered to 800 DEG C of insulations 2 hours, is incubated 2 hours then at 400 DEG C, i.e. can get high stability magnetic material finished product.
Claims (2)
1. a high stability magnetic material, it is characterised in that it consists of the following components in percentage by weight: neodymium 28%, boron 1%, dysprosium 2%, praseodymium 1%, gadolinium 2%, zirconium 2%, niobium 1%, copper 3%, surplus are ferrum.
2. the method preparing high stability magnetic material as claimed in claim 1, it is characterised in that comprise the following steps:
Step one dispensing, weighs raw material according to the content proportioning of component each in high stability magnetic material；
Step 2 melting, first by neodymium, praseodymium in 1100 DEG C of fusings, is subsequently adding dysprosium, gadolinium, copper in 1500 DEG C of fusings, adds boron, zirconium, niobium, ferrum in 2000 DEG C of fusings, and after then the said components of all fusings being sufficiently mixed, casting is cooled to neodymium iron boron block；
Step 3 hydrogen is broken, and neodymium iron boron block is put into hydrogen crushing device, and prepared granularity is 0.5mm particles below；
Step 4 powder process, carries out airflow milling powder by broken for hydrogen good granule, and powder size reaches below 1 μm；
Step 5 molding, mixes above-mentioned powder in batch mixer more than 2 hours, is pressed into blank with mould in the environment of stationary magnetic field；
Step 6 sinters, and by blank pre-burning 2 hours under 500 DEG C of vacuum conditions, sinters 4 hours in 1200 DEG C in placing into vacuum drying oven, after being then tempered to 800 DEG C of insulations 2 hours, is incubated 2 hours then at 400 DEG C, i.e. can get high stability magnetic material finished product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610622954.5A CN106024249A (en) | 2016-08-02 | 2016-08-02 | High-stability magnetic material and preparation method thereof |
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| CN201610622954.5A Pending CN106024249A (en) | 2016-08-02 | 2016-08-02 | High-stability magnetic material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541687A (en) * | 2020-11-26 | 2022-05-27 | 和也健康科技有限公司 | Healthy bamboo floor structure for house |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436889A (en) * | 2011-11-16 | 2012-05-02 | 宁波同创强磁材料有限公司 | Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof |
| CN104252938A (en) * | 2014-09-12 | 2014-12-31 | 沈阳中北通磁科技股份有限公司 | Multi-main phase Ho-containing NdFeB (neodymium iron boron) permanent magnet and manufacturing method thereof |
-
2016
- 2016-08-02 CN CN201610622954.5A patent/CN106024249A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436889A (en) * | 2011-11-16 | 2012-05-02 | 宁波同创强磁材料有限公司 | Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof |
| CN104252938A (en) * | 2014-09-12 | 2014-12-31 | 沈阳中北通磁科技股份有限公司 | Multi-main phase Ho-containing NdFeB (neodymium iron boron) permanent magnet and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541687A (en) * | 2020-11-26 | 2022-05-27 | 和也健康科技有限公司 | Healthy bamboo floor structure for house |
| CN114541687B (en) * | 2020-11-26 | 2023-10-13 | 和也健康科技有限公司 | Bamboo floor structure for healthy house |
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