CN105562196A - Magnetic rod - Google Patents
Magnetic rod Download PDFInfo
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- CN105562196A CN105562196A CN201610055494.2A CN201610055494A CN105562196A CN 105562196 A CN105562196 A CN 105562196A CN 201610055494 A CN201610055494 A CN 201610055494A CN 105562196 A CN105562196 A CN 105562196A
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- magnet steel
- steel
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- magnet
- bar magnet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/08—Iron group metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0573—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes obtained by reduction or by hydrogen decrepitation or embrittlement
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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
Abstract
The invention relates to a magnetic rod. The magnetic rod comprises a steel pipe taking the shape of a straight cylinder; multiple magnetic steels are arranged in the steel pipe; the outer diameters of the magnetic steels are slightly smaller than the inner diameter of the steel pipe; the magnetic poles of two adjacent magnetic steels are opposite; gaskets are arranged between two adjacent magnetic steels; the outer diameters of the gaskets are equal the inner diameters of the magnetic steels; through holes are formed in the middle parts of the gaskets; plugs are tightly matched at two ends of the steel pipe; the inner ends of the plugs are butted against the magnetic steels; the magnetic steels are sintered neodymium iron boron magnetic steels; and the sintered neodymium iron boron magnetic steels consist of the following components in percentage by mass: 28-33.5% of Nd, 1.1-1.2% of B, 3-6% of Co, 0.15-0.2% of Cu, 0.1-0.5% of Al, 0.5-1% of Zr, 0.1-0.5% of Nb, 1-3% of element M, 5-10% of reinforced fibers, and the balance of Fe. The magnetic rod is simple in structure, high in magnetic field strength, better in mechanical performance and long in service life.
Description
Technical field
The present invention relates to a kind of bar magnet, belong to field of mechanical technique.
Background technology
At present, bar magnet is widely used in the fields such as chemical industry, food, waste recovery and carbon black, is mainly used to filter ferrous contaminants in various fine powder and liquid, semiliquid and other bands can magnetic material.But the structure of bar magnet of the prior art is generally and arranges plural magnet in magnetic conductivity shell, arranges between magnet in the mode that heteropole is attracting.In actual applications, the magnetic field intensity of bar magnet is large not, can not remove the magnetic conductivity impurity in raw material more up hill and dale for the bar magnet of this kind of structure.
In addition, the working environment of bar magnet determine bar magnet must with certain characteristic such as corrosion-resistant, high temperature resistant.And the magnet in bar magnet is general all more crisp, in use, the easy brittle failure of magnet, magnetic conduction needs frequently to change bar magnet bar magnet, increases cost.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose that a kind of structure is simple, bar magnet that advantages of good adsorption effect, service life are of a specified duration.
Object of the present invention realizes by following technical proposal: a kind of bar magnet, comprise the steel pipe in straight-tube shape, some magnet steel are provided with and the external diameter of magnet steel is slightly less than the internal diameter of steel pipe in steel pipe, pad is provided with between two magnet steel that two adjacent magnetic steel magnetic pole are contrary and adjacent, the external diameter of pad equals the internal diameter of magnet steel and offer through hole in the middle part of pad, has plug and the inner of plug pushes against on magnet steel at the equal close-fitting in the two ends of steel pipe;
Wherein, magnet steel is sintered NdFeB magnet steel, sintered NdFeB magnet steel is become to be grouped into by following mass percent: Nd:28%-33.5%, B:1.1%-1.2%, Co:3%-6%, Cu:0.15%-0.2%, Al:0.1%-0.5%, Zr:0.5%-1%, Nb:0.1%-0.5%, element M: 1-3%, fortifying fibre: 5-10%, surplus is Fe.
The obdurability of sintered NdFeB magnet steel is poor, easily ftractures in process.Meanwhile, antivibration, the impact resistance of magnet steel are poor, and owing to there is gap between magnet steel outer wall of the present invention and steel pipe inner wall, make magnet steel when being applied in bar magnet of the present invention, if run into special circumstances, magnet steel and steel pipe collide, magnet steel is easily cracked, causes bar magnet not use.Therefore, the obdurability of magnet steel must be improved.
Find after deliberation, the fracture mode of magnet steel is mainly along crystal boundary brittle failure, and namely crackle is mainly expanded along crystal boundary.And occur this fracture be on the one hand because the rich-Nd phase intensity of crystal boundary and Toughness Ratio poor, be on the other hand because Grain-Boundary Phase skewness, there is pore, main phase grain is thick.Therefore, the present invention is by adding alloying element malleableize crystal boundary, refinement main phase grain, simultaneously, also by the method for physical modification, in the matrix of Nd-Fe-B magnet steel, introduce same matrix combine well and the fortifying fibre had compared with high-strength tenacity, to improve the mechanical properties such as the obdurability of Nd-Fe-B magnet steel.
In above-mentioned a kind of bar magnet, fortifying fibre is one or more in carbon fiber, glass fibre, aramid fiber, nylon fiber, boron fibre.The reinforcing fiber materials that the present invention uses all has the performances such as higher intensity, toughness, impact resistance, fatigue durability, so can greatly improve the mechanical properties such as the obdurability of sintered NdFeB magnet steel with above-mentioned fortifying fibre blending and modifying sintered NdFeB magnet steel.
The present invention's compound in magnet steel with the addition of Nb and Zr element, can improve the crystallization temperature of α-Fe phase, suppresses the precipitation of α-Fe and grows up, avoiding the formation of metastable phase, thus improves the percent by volume of Hard Magnetic phase.Meanwhile, Nb and Zr compound add can also refinement, homogenising Sum fanction main phase grain, malleableize crystal boundary, thus the mechanical property such as obdurability improving magnet steel.
In addition, Co element on the intensity of sintered NdFeB magnet steel and the impact of fracture toughness extremely important.Invention increases Co content, improve the element composition in rich-Nd phase, define the rich-Nd phase containing Co, thus improve the intensity of rich-Nd phase, improve fracture toughness.But, also can reduce the bending strength of magnet steel.So the present invention with the addition of again the Cu element of trace, and Cu element can improve the bending strength of magnet steel, makes up the defect that the increase of Co element makes magnet steel bending strength reduce.
In above-mentioned a kind of bar magnet, element M is one or both in Ga, Ho.In sintered NdFeB magnet steel, add Ga or Ho element, the basis of having improved the crystallization temperature of α-Fe phase in the present invention effectively can suppress the formation of α-Fe phase, thus can refinement main phase grain, make magnet steel column crystal feature quite obvious.Meanwhile, rich-Nd phase is mainly uniformly distributed in main phase grain border with chip shape, thus effectively improves the mechanical properties such as the obdurability of magnet steel.
In above-mentioned a kind of bar magnet, the preparation method of sintered NdFeB magnet steel mainly comprises the following steps:
S1, carry out melting by the constituent of Nd-Fe-B magnet steel and mass percent proportioning raw material, pour into after melting completely and get rid of band;
S2, the band that gets rid of obtained above is carried out the broken and airflow milling of hydrogen, make powder;
S3, fortifying fibre and above-mentioned powder put under inert gas shielding moulding press mould and add magnetic field and carry out orientation, compressing after orientation, demagnetization Vacuum Package, obtain green compact, take out after the process of green compact isostatic pressed;
S4, green compact obtained above are put into sintering furnace at high temperature sinter, then carry out a tempering and air-cooled, the green compact after air-cooled take out after carrying out double tempering, obtain Nd-Fe-B magnet steel.
In above-mentioned a kind of bar magnet, in step S2, the particle diameter of powder is 2.9-3.3 μm.The particle mean size of powder within the scope of the present invention time, the crystallite dimension of magnet steel reduces, and bending strength increases about 50% relatively.
In above-mentioned a kind of bar magnet, in step S4, sintering temperature is 1050-1150 DEG C, and sintering time is 3-5h.
In above-mentioned a kind of bar magnet, in step S4, Tempering temperature is 800-900 DEG C, and a tempering time is 3-4h; Double tempering temperature is 580-600 DEG C, and the double tempering time is 4-5h.Sintered NdFeB magnet steel adopts double tempering technique, and the especially control of the double tempering temperature and time that temperature is lower is the important factor in order obtaining comparatively ideal magnetic property.
In above-mentioned a kind of bar magnet, plug adopts stainless steel to make.
In above-mentioned a kind of bar magnet, plug outer face offers hexagonal screwing tieholen.
In above-mentioned a kind of bar magnet, the external diameter 0.1mm larger than the external diameter of magnet steel of pad.
Compared with prior art, the present invention has following advantage:
1. the present invention is tight with at the two ends of steel pipe by plug and the inner of plug pushes against on magnet steel, thus make plug, magnet steel and pad are pressed on together mutually, the external diameter of magnet steel is slightly less than the internal diameter of steel pipe simultaneously, namely between magnet steel outer wall and steel pipe inner wall, there is gap, and the mode to repel mutually with homopolarity due to the magnetic pole of adjacent two magnet steel distributes, magnetic direction between magnet steel in opposite directions or opposing, the magnetic pole of a superposition is created between adjacent two magnetic poles, thus the magnetic field energy making magnet steel produce concentrates on pad, add the operating point of bar magnet, thus increase the magnetic field intensity of bar magnet.
2. the present invention is by adding alloying element malleableize crystal boundary, refinement main phase grain, simultaneously, also by the method for physical modification, in the matrix of Nd-Fe-B magnet steel, introduce same matrix combine well and the fortifying fibre had compared with high-strength tenacity, thus improve the mechanical properties such as the obdurability of Nd-Fe-B magnet steel.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 1, steel pipe; 2, magnet steel; 3, pad; 31, through hole; 4, plug; 41, hexagonal screwing tieholen.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1, this bar magnet comprises the steel pipe 1 in straight-tube shape, some magnet steel 2 are provided with and the external diameter of magnet steel 2 is slightly less than the internal diameter of steel pipe 1 in steel pipe 1, pad 3 is provided with between two magnet steel 2 that two adjacent magnet steel 2 magnetic poles are contrary and adjacent, the external diameter of pad 3 equals the internal diameter of magnet steel 2 and offer through hole 31 in the middle part of pad 3, has plug 4 and the inner of plug 4 pushes against on magnet steel 2 at the equal close-fitting in the two ends of steel pipe 1.
Magnet steel 2 and pad 3 are loaded to after in steel pipe 1, the two ends of steel pipe 1 are tight with at and the inner of plug 4 pushes against on magnet steel 2 by plug 4, thus make plug 4, magnet steel 2 and pad 3 are pressed on together mutually, the external diameter of magnet steel 2 is slightly less than the internal diameter of steel pipe 1 simultaneously, namely between magnet steel 2 outer wall and steel pipe 1 inwall, there is gap, and the mode to repel mutually with homopolarity due to the magnetic pole of adjacent two magnet steel 2 distributes, magnetic direction between magnet steel 2 in opposite directions or opposing, the magnetic pole of a superposition is created between adjacent two magnetic poles, thus the magnetic field energy making magnet steel 2 produce concentrates on pad 3, add the operating point of bar magnet, thus increase the magnetic field intensity of bar magnet.
In the middle part of pad 3, offer through hole 31 simultaneously, not only reduce the weight of pad, reduce production cost, the magnetic field energy that through hole 31 makes magnet steel 2 produce simultaneously more concentrates on the outward flange of pad 3, thus is strengthened in the magnetic field at the position that steel pipe 1 is contacted with pad 3.
Further, described plug 4 adopts stainless steel to make.Adopt the plug 4 made of stainless steel and steel pipe 1, there will not be corrosion phenomenon when adsorbing iron tramp in corrosive liquids, extend its service life.
Further, plug 4 outer face offers hexagonal screwing tieholen 41, magnet steel 2 and pad 3 are loaded to after in steel pipe 1, plug 4 is tight with on steel pipe 1 by the hexagonal screwing tieholen 41 being located at plug 4 by tool inserting, and make magnet steel 2, pad 3 and plug 4 abut against together, avoid the magnet steel 2 be positioned in steel pipe 1 to occur the situation of rocking, then welded by laser weld or argon arc welding in the gap between plug 4 and steel pipe 1, crator is fallen in last polishing.
Further, the external diameter of pad 3 0.1mm larger than the external diameter of magnet steel 2.
Further, magnet steel 2 is sintered NdFeB magnet steel, sintered NdFeB magnet steel is become to be grouped into by following mass percent: Nd:28%-33.5%, B:1.1%-1.2%, Co:3%-6%, Cu:0.15%-0.2%, Al:0.1%-0.5%, Zr:0.5%-1%, Nb:0.1%-0.5%, element M: 1-3%, fortifying fibre: 5-10%, surplus is Fe.
Magnet steel embodiment 1:
By Nd:28%, B:1.1%, Co:3%, Cu:0.15%, Al:0.1%, Zr:0.5%, Nb:0.1%, element M: 1%, fortifying fibre: 5%, surplus is that Fe carries out proportioning raw material and melting, wherein, element M is Ho, and fortifying fibre is glass fibre, pours into and get rid of band after melting completely.Then the band that gets rid of obtained is carried out the broken and airflow milling of hydrogen, make the powder of particle diameter within the scope of 2.9-3.3 μm.And then fortifying fibre and the powder that obtains put under inert gas shielding moulding press mould and add magnetic field and carry out orientation, compressing after orientation, demagnetization Vacuum Package, obtain green compact, take out after the process of green compact isostatic pressed.Finally the green compact obtained are put into sintering furnace and sinter 5h under 1050 DEG C of high temperature, after sintering on 800 DEG C once tempering 4h, air-cooled after tempering, taking out after double tempering 5h at 580 DEG C after air-cooled, obtains Nd-Fe-B magnet steel.
Magnet steel embodiment 2:
By Nd:29%, B:1.12%, Co:4%, Cu:0.16%, Al:0.2%, Zr:0.6%, Nb:0.2%, element M: 1.5%, fortifying fibre: 6%, surplus is that Fe carries out proportioning raw material and melting, and wherein, element M is Ho, fortifying fibre is aramid fiber, pours into and get rid of band after melting completely.Then the band that gets rid of obtained is carried out the broken and airflow milling of hydrogen, make the powder of particle diameter within the scope of 2.9-3.3 μm.And then fortifying fibre and the powder that obtains put under inert gas shielding moulding press mould and add magnetic field and carry out orientation, compressing after orientation, demagnetization Vacuum Package, obtain green compact, take out after the process of green compact isostatic pressed.Finally the green compact obtained are put into sintering furnace and sinter 5h under 1080 DEG C of high temperature, after sintering on 820 DEG C once tempering 4h, air-cooled after tempering, taking out after double tempering 5h at 585 DEG C after air-cooled, obtains Nd-Fe-B magnet steel.
Magnet steel embodiment 3:
By Nd:31%, B:1.15%, Co:5%, Cu:0.18%, Al:0.3%, Zr:0.8%, Nb:0.3%, element M: 2%, fortifying fibre: 8%, surplus is that Fe carries out proportioning raw material and melting, wherein, element M is Ho, and fortifying fibre is carbon fiber, pours into and get rid of band after melting completely.Then the band that gets rid of obtained is carried out the broken and airflow milling of hydrogen, make the powder of particle diameter within the scope of 2.9-3.3 μm.And then fortifying fibre and the powder that obtains put under inert gas shielding moulding press mould and add magnetic field and carry out orientation, compressing after orientation, demagnetization Vacuum Package, obtain green compact, take out after the process of green compact isostatic pressed.Finally the green compact obtained are put into sintering furnace and sinter 4h under 1100 DEG C of high temperature, after sintering on 850 DEG C once tempering 3.5h, air-cooled after tempering, taking out after double tempering 4.5h at 590 DEG C after air-cooled, obtains Nd-Fe-B magnet steel.
Magnet steel embodiment 4:
By Nd:32%, B:1.18%, Co:5%, Cu:0.19%, Al:0.4%, Zr:0.9%, Nb:0.4%, element M: 2.5%, fortifying fibre: 9%, surplus is that Fe carries out proportioning raw material and melting, and wherein, element M is Ho, fortifying fibre is nylon fiber, pours into and get rid of band after melting completely.Then the band that gets rid of obtained is carried out the broken and airflow milling of hydrogen, make the powder of particle diameter within the scope of 2.9-3.3 μm.And then fortifying fibre and the powder that obtains put under inert gas shielding moulding press mould and add magnetic field and carry out orientation, compressing after orientation, demagnetization Vacuum Package, obtain green compact, take out after the process of green compact isostatic pressed.Finally the green compact obtained are put into sintering furnace and sinter 4h under 1130 DEG C of high temperature, after sintering on 880 DEG C once tempering 3h, air-cooled after tempering, taking out after double tempering 4h at 595 DEG C after air-cooled, obtains Nd-Fe-B magnet steel.
Magnet steel embodiment 5:
By Nd:33.5%, B:1.2%, Co:6%, Cu:0.2%, Al:0.5%, Zr:1%, Nb:0.5%, element M: 3%, fortifying fibre: 10%, surplus is that Fe carries out proportioning raw material and melting, wherein, element M is Ho, and fortifying fibre is boron fibre, pours into and get rid of band after melting completely.Then the band that gets rid of obtained is carried out the broken and airflow milling of hydrogen, make the powder of particle diameter within the scope of 2.9-3.3 μm.And then fortifying fibre and the powder that obtains put under inert gas shielding moulding press mould and add magnetic field and carry out orientation, compressing after orientation, demagnetization Vacuum Package, obtain green compact, take out after the process of green compact isostatic pressed.Finally the green compact obtained are put into sintering furnace and sinter 3h under 1150 DEG C of high temperature, after sintering on 900 DEG C once tempering 3h, air-cooled after tempering, taking out after double tempering 4h at 600 DEG C after air-cooled, obtains Nd-Fe-B magnet steel.
Comparative example 1:
Comparative example 1 is only with the difference of embodiment 3, and comparative example 1 is Addition ofelements M not.
Comparative example 2:
Comparative example 2 is only with the difference of embodiment 3, and comparative example 1 does not add fortifying fibre.
Comparative example 3:
Comparative example 3 is only with the difference of embodiment 3, and in comparative example 3, the addition of Co element is 2.5%.
Comparative example 4:
Comparative example 4 is only with the difference of embodiment 3, and in comparative example 4, Nb element is replaced by the Zr element of equivalent.
Comparative example 5:
Comparative example 5 is only with the difference of embodiment 3, and in comparative example 5, Zr element is replaced by the Nb element of equivalent.
Comparative example 6:
Comparative example 6 is only with the difference of embodiment 3, and comparative example 6 hydrogen is broken is 4 μm with the powder average grain diameter that air-flow grinds.
Above-mentioned magnet steel is carried out performance test, and test result as shown in Table 1 and Table 2.
Table 1
Table 2
From table 1 and table 2, the magnet steel that formula of the present invention and preparation method are prepared from is all better in the mechanical property such as magnetic property and obdurability, is satisfied with the application of magnet steel in bar magnet of the present invention.
In above-described embodiment and alternative thereof, element M can also be Ga.
In above-described embodiment and alternative thereof, element M can also be the mixing of Ga and Ho, and mass ratio can be 0.5:1,0.6:1,0.7:1,0.8:1,0.9:1,1:1,1.1:1,1.2:1,1.3:1,1.4:1,1.5:1,1.6:1,1.7:1,1.8:1,1.9:1,2.0:1.
In above-described embodiment and alternative thereof, fortifying fibre can also be the mixing of the mixing of any two kinds in carbon fiber, glass fibre, aramid fiber, nylon fiber, boron fibre or the mixing of any three kinds or the mixing of any four kinds or five kinds.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although made a detailed description the present invention and quoted some specific embodiments as proof, to those skilled in the art, only otherwise it is obvious for leaving that the spirit and scope of the present invention can make various changes or revise.
Claims (10)
1. a bar magnet, it is characterized in that, comprise the steel pipe in straight-tube shape, some magnet steel are provided with and the external diameter of magnet steel is slightly less than the internal diameter of steel pipe in steel pipe, pad is provided with between two magnet steel that two adjacent magnetic steel magnetic pole are contrary and adjacent, the external diameter of pad equals the internal diameter of magnet steel and offer through hole in the middle part of pad, has plug and the inner of plug pushes against on magnet steel at the equal close-fitting in the two ends of steel pipe;
Wherein, described magnet steel is sintered NdFeB magnet steel, described sintered NdFeB magnet steel is become to be grouped into by following mass percent: Nd:28%-33.5%, B:1.1%-1.2%, Co:3%-6%, Cu:0.15%-0.2%, Al:0.1%-0.5%, Zr:0.5%-1%, Nb:0.1%-0.5%, element M: 1-3%, fortifying fibre: 5-10%, surplus is Fe.
2. a kind of bar magnet according to claim 1, is characterized in that, described fortifying fibre is one or more in carbon fiber, glass fibre, aramid fiber, nylon fiber, boron fibre.
3. a kind of bar magnet according to claim 1, is characterized in that, described element M is one or both in Ga, Ho.
4. a kind of bar magnet according to claim 1, is characterized in that, the preparation method of described sintered NdFeB magnet steel mainly comprises the following steps:
S1, carry out melting by the constituent of Nd-Fe-B magnet steel and mass percent proportioning raw material, pour into after melting completely and get rid of band;
S2, the band that gets rid of obtained above is carried out the broken and airflow milling of hydrogen, make powder;
S3, fortifying fibre and above-mentioned powder put under inert gas shielding moulding press mould and add magnetic field and carry out orientation, compressing after orientation, demagnetization Vacuum Package, obtain green compact, take out after the process of green compact isostatic pressed;
S4, green compact obtained above are put into sintering furnace at high temperature sinter, then carry out a tempering and air-cooled, the green compact after air-cooled take out after carrying out double tempering, obtain Nd-Fe-B magnet steel.
5. a kind of bar magnet according to claim 4, is characterized in that, the particle diameter of powder described in step S2 is 2.9-3.3 μm.
6. a kind of bar magnet according to claim 4, is characterized in that, in step S4, sintering temperature is 1050-1150 DEG C, and sintering time is 3-5h.
7. a kind of bar magnet according to claim 4, is characterized in that, in step S4, Tempering temperature is 800-900 DEG C, and a tempering time is 3-4h; Double tempering temperature is 580-600 DEG C, and the double tempering time is 4-5h.
8. a kind of bar magnet according to claim 1, is characterized in that, described plug adopts stainless steel to make.
9. a kind of bar magnet according to claim 1 or 8, is characterized in that, plug outer face offers hexagonal screwing tieholen.
10. a kind of bar magnet according to claim 1 or 8, is characterized in that, the external diameter 0.1mm larger than the external diameter of magnet steel of pad.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108389672A (en) * | 2017-12-27 | 2018-08-10 | 宁波招宝磁业有限公司 | Fibre reinforced neodymium iron boron magnetic body and preparation method thereof |
| CN111872356A (en) * | 2020-08-06 | 2020-11-03 | 上海大学 | Preparation device and preparation method of carbon fiber-reinforced alloy composite material with magnetic refrigeration function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0379722A (en) * | 1989-08-21 | 1991-04-04 | Kawasaki Steel Corp | Manufacture of grain oriented silicon steel sheet having excellent magnetic characteristics |
| CN2719830Y (en) * | 2004-08-23 | 2005-08-24 | 赵治 | Magnetized scale-proof descaling device |
| JP2008261022A (en) * | 2007-04-13 | 2008-10-30 | Nippon Steel Corp | Grain oriented electrical decarburized annealed steel sheet, and method for producing the same |
| CN102412044A (en) * | 2011-11-16 | 2012-04-11 | 宁波同创强磁材料有限公司 | Ultralow weightless sintered neodymium iron boron magnetic material and preparation method thereof |
| CN104332264A (en) * | 2014-10-13 | 2015-02-04 | 宁波尼兰德磁业有限公司 | Method for enhancing properties of sintered neodymium-iron-boron magnets |
| CN104668087A (en) * | 2014-09-24 | 2015-06-03 | 江西艾芬达卫浴有限公司 | Magnetic filter |
-
2016
- 2016-01-27 CN CN201610055494.2A patent/CN105562196A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0379722A (en) * | 1989-08-21 | 1991-04-04 | Kawasaki Steel Corp | Manufacture of grain oriented silicon steel sheet having excellent magnetic characteristics |
| CN2719830Y (en) * | 2004-08-23 | 2005-08-24 | 赵治 | Magnetized scale-proof descaling device |
| JP2008261022A (en) * | 2007-04-13 | 2008-10-30 | Nippon Steel Corp | Grain oriented electrical decarburized annealed steel sheet, and method for producing the same |
| CN102412044A (en) * | 2011-11-16 | 2012-04-11 | 宁波同创强磁材料有限公司 | Ultralow weightless sintered neodymium iron boron magnetic material and preparation method thereof |
| CN104668087A (en) * | 2014-09-24 | 2015-06-03 | 江西艾芬达卫浴有限公司 | Magnetic filter |
| CN104332264A (en) * | 2014-10-13 | 2015-02-04 | 宁波尼兰德磁业有限公司 | Method for enhancing properties of sintered neodymium-iron-boron magnets |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108389672A (en) * | 2017-12-27 | 2018-08-10 | 宁波招宝磁业有限公司 | Fibre reinforced neodymium iron boron magnetic body and preparation method thereof |
| CN111872356A (en) * | 2020-08-06 | 2020-11-03 | 上海大学 | Preparation device and preparation method of carbon fiber-reinforced alloy composite material with magnetic refrigeration function |
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