CN102832038A - Production technology of rubidium iron boron permanent magnet - Google Patents
Production technology of rubidium iron boron permanent magnet Download PDFInfo
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- CN102832038A CN102832038A CN 201210346918 CN201210346918A CN102832038A CN 102832038 A CN102832038 A CN 102832038A CN 201210346918 CN201210346918 CN 201210346918 CN 201210346918 A CN201210346918 A CN 201210346918A CN 102832038 A CN102832038 A CN 102832038A
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Abstract
The invention relates to a production technology of rubidium iron boron permanent magnet. Due to the adoption of the production technology, the thickness of alloy reaches 0.2 to 0.4mm, the crystalline grains are fine and uniform, rich rubidium is uniformly distributed, and the problems of an ordinary casting process can be solved; and meanwhile, the oxygen content is reduced, high vacuum degree, high humidity uniformity and rapid cooling of a product sintering process can be guaranteed, and the product performance and uniformity consistency can be improved.
Description
Technical field
The present invention relates to a kind of production technology, be specially a kind of production technology of rubidium iron boron permanent magnet.
Background technology
At present, the output of China's sintering rubidium iron B permanent magnetic material ranks first in the world, and is real big producing country.But domestic rubidium iron B permanent magnetic material also has big gap with comparing abroad aspect properties of product, the thermal stability, the non-oxidizability that mainly show as material thoroughly solve; The product magnetic property is less stable also, and is dispersed big; Permanent magnet processing, the technical matters that magnetizes etc. still do not pass a test, and these all need further to explore and solve.
Summary of the invention
The technical problem that the present invention solved is to provide a kind of production technology of rubidium iron boron permanent magnet, to solve the shortcoming in the above-mentioned background technology.
The technical problem that the present invention solved adopts following technical scheme to realize:
A kind of production technology of rubidium iron boron permanent magnet:
1) ferro-boron, Dy-Fe alloy and pure iron are carried out pretreatment of raw material, remove wherein iron rust and other impurity;
2) in having accomplished pretreated raw material, add rare metal in proportion: neodymium, praseodymium neodymium, dysprosium cobalt, terbium, gallium, zirconium and titanium;
3) charging back elder generation to 0.2Pa, behind the preheating certain hour, charges into 399.3-533.2*10 with stove evacuation
2The argon gas of Pa then carries out high-power fusing, carries out pouring behind the static determinacy certain hour of molten clear back, feeds water when needed through circulation when needing water;
4) the Nd Fe B alloys liquation of melting being accomplished is poured into and is carried out water-cooled casting in the casting mould, and used water is provided by circulation;
5) Nd Fe B alloys that will accomplish cooling places hydrogen environment, carries out the broken processing of hydrogen, makes Nd Fe B alloys become meal;
6) adopt high pressure draught to carry out the air-flow abrasive dust through the Nd Fe B alloys meal of hydrogen after broken; After being collided each other, the Nd Fe B alloys meal becomes fine powder;
7) carry out magnetic field orientating and forming materials through the Nd Fe B alloys fine powder behind the air-flow abrasive dust through " vertical steel mold pressing+isostatic compaction " method;
8) having confirmed that magnetic field orientating and molded material are put in the vacuum sintering furnace in airtight, vacuum and are full of under the environment of argon gas carries out sintering, and feeds water through circulation;
9) material behind oversintering detects through Performance Detection, Ageing Treatment, machine work and magnetization again, finally forms Nd-Fe-B permanent magnet.
2. according to the production technology of the said a kind of rubidium iron boron permanent magnet of claim 1, it is characterized in that what adopt when carrying out said high vacuum melting is medium frequency induction melting furnace.
Among the present invention, the HD hydrogen decrepitation that is is adopted in the broken processing of said hydrogen.
Among the present invention, what when carrying out said magnetic field orientating, adopt is high-intensity magnetic field oriented moulding technology.
Among the present invention, what adopt when in vacuum sintering furnace, carrying out sintering is the fully-sealed high vacuum gas sintering process of quenching.
Beneficial effect
The present invention makes alloy thickness reach 0.2-0.4mm, and crystal grain is tiny evenly, and rich neodymium is evenly distributed, and solves the problem that common casting ingot process runs into; Reduce oxygen content simultaneously, guarantee condition of high vacuum degree, high humility uniformity and the cooling fast of goods sintering process, enhance product performance and uniformity consistency thereby reach.
Description of drawings
Fig. 1 is a process chart of the present invention.
Embodiment
For example the present invention is set forth in detail below.
1) ferro-boron, Dy-Fe alloy and pure iron are carried out pretreatment of raw material, remove wherein iron rust and other impurity;
2) in having accomplished pretreated raw material, add rare metal in proportion: neodymium, praseodymium neodymium, dysprosium cobalt, terbium, gallium, zirconium and titanium;
3) charging back elder generation to 0.2Pa, behind the preheating certain hour, charges into 399.3-533.2*10 with stove evacuation
2The argon gas of Pa then carries out high-power fusing, carries out pouring behind the static determinacy certain hour of molten clear back, feeds water when needed through circulation when needing water;
4) the Nd Fe B alloys liquation of melting being accomplished is poured into and is carried out water-cooled casting in the casting mould, and used water is provided by circulation;
5) Nd Fe B alloys that will accomplish cooling places hydrogen environment, carries out the broken processing of hydrogen, makes Nd Fe B alloys become meal;
6) adopt high pressure draught to carry out the air-flow abrasive dust through the Nd Fe B alloys meal of hydrogen after broken; After being collided each other, the Nd Fe B alloys meal becomes fine powder;
7) carry out magnetic field orientating and forming materials through the Nd Fe B alloys fine powder behind the air-flow abrasive dust through " vertical steel mold pressing+isostatic compaction " method;
8) having confirmed that magnetic field orientating and molded material are put in the vacuum sintering furnace in airtight, vacuum and are full of under the environment of argon gas carries out sintering, and feeds water through circulation;
9) material behind oversintering detects through Performance Detection, Ageing Treatment, machine work and magnetization again, finally forms Nd-Fe-B permanent magnet.
2. according to the production technology of the said a kind of rubidium iron boron permanent magnet of claim 1, it is characterized in that what adopt when carrying out said high vacuum melting is medium frequency induction melting furnace.
Among the present invention, the HD hydrogen decrepitation that is is adopted in the broken processing of said hydrogen.
Among the present invention, what when carrying out said magnetic field orientating, adopt is high-intensity magnetic field oriented moulding technology.
Among the present invention, what adopt when in vacuum sintering furnace, carrying out sintering is the fully-sealed high vacuum gas sintering process of quenching.
More than show and described basic principle of the present invention and principal character and advantage of the present invention; The technical staff of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention, and under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications; These variations and improvement all fall in the scope of the invention that requires protection, and the present invention requires protection range to be defined by appending claims and equivalent thereof.
Claims (5)
1. the production technology of a rubidium iron boron permanent magnet is characterized in that:
1) ferro-boron, Dy-Fe alloy and pure iron are carried out pretreatment of raw material, remove wherein iron rust and other impurity;
2) in having accomplished pretreated raw material, add rare metal in proportion: neodymium, praseodymium neodymium, dysprosium cobalt, terbium, gallium, zirconium and titanium;
3) charging back elder generation to 0.2Pa, behind the preheating certain hour, charges into 399.3-533.2*10 with stove evacuation
2The argon gas of Pa then carries out high-power fusing, carries out pouring behind the static determinacy certain hour of molten clear back, feeds water when needed through circulation when needing water;
4) the Nd Fe B alloys liquation of melting being accomplished is poured into and is carried out water-cooled casting in the casting mould, and used water is provided by circulation;
5) Nd Fe B alloys that will accomplish cooling places hydrogen environment, carries out the broken processing of hydrogen, makes Nd Fe B alloys become meal;
6) adopt high pressure draught to carry out the air-flow abrasive dust through the Nd Fe B alloys meal of hydrogen after broken; After being collided each other, the Nd Fe B alloys meal becomes fine powder;
7) carry out magnetic field orientating and forming materials through the Nd Fe B alloys fine powder behind the air-flow abrasive dust through " vertical steel mold pressing+isostatic compaction " method;
8) having confirmed that magnetic field orientating and molded material are put in the vacuum sintering furnace in airtight, vacuum and are full of under the environment of argon gas carries out sintering, and feeds water through circulation;
9) material behind oversintering detects through Performance Detection, Ageing Treatment, machine work and magnetization again, finally forms Nd-Fe-B permanent magnet.
2. according to the production technology of the said a kind of rubidium iron boron permanent magnet of claim 1, it is characterized in that what adopt when carrying out said high vacuum melting is medium frequency induction melting furnace.
3. according to the production technology of the said a kind of rubidium iron boron permanent magnet of claim 1, it is characterized in that the HD hydrogen decrepitation that is is adopted in the broken processing of said hydrogen.
4. according to the production technology of the said a kind of rubidium iron boron permanent magnet of claim 1, it is characterized in that what when carrying out said magnetic field orientating, adopt is high-intensity magnetic field oriented moulding technology.
5. according to the production technology of the said a kind of rubidium iron boron permanent magnet of claim 1, it is characterized in that what adopt when in vacuum sintering furnace, carrying out sintering is the fully-sealed high vacuum gas sintering process of quenching.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210346918 CN102832038A (en) | 2012-09-19 | 2012-09-19 | Production technology of rubidium iron boron permanent magnet |
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| CN 201210346918 CN102832038A (en) | 2012-09-19 | 2012-09-19 | Production technology of rubidium iron boron permanent magnet |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215467A (en) * | 2013-05-05 | 2013-07-24 | 沈阳中北真空磁电科技有限公司 | Manufacture method of high-performance neodymium iron boron rare-earth permanent magnetic material |
| CN105118597A (en) * | 2015-09-18 | 2015-12-02 | 江苏普隆磁电有限公司 | High-performance neodymium-iron-boron permanent magnet and production method thereof |
| CN108188152A (en) * | 2017-12-30 | 2018-06-22 | 北京工业大学 | A kind of method for removing carbon oxygen in waste and old fast quenching cohesive neodymium iron boron magnetic particle |
-
2012
- 2012-09-19 CN CN 201210346918 patent/CN102832038A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215467A (en) * | 2013-05-05 | 2013-07-24 | 沈阳中北真空磁电科技有限公司 | Manufacture method of high-performance neodymium iron boron rare-earth permanent magnetic material |
| CN103215467B (en) * | 2013-05-05 | 2015-07-08 | 沈阳中北真空磁电科技有限公司 | Manufacture method of high-performance neodymium iron boron rare-earth permanent magnetic material |
| CN105118597A (en) * | 2015-09-18 | 2015-12-02 | 江苏普隆磁电有限公司 | High-performance neodymium-iron-boron permanent magnet and production method thereof |
| CN108188152A (en) * | 2017-12-30 | 2018-06-22 | 北京工业大学 | A kind of method for removing carbon oxygen in waste and old fast quenching cohesive neodymium iron boron magnetic particle |
| CN108188152B (en) * | 2017-12-30 | 2020-09-25 | 北京工业大学 | Method for removing carbon and oxygen in waste rapidly quenched bonded neodymium iron boron magnetic powder |
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Application publication date: 20121219 |