CN101572145A - Flaky rare earth permanent magnet powder and preparation method thereof - Google Patents
Flaky rare earth permanent magnet powder and preparation method thereof Download PDFInfo
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- CN101572145A CN101572145A CN 200910118986 CN200910118986A CN101572145A CN 101572145 A CN101572145 A CN 101572145A CN 200910118986 CN200910118986 CN 200910118986 CN 200910118986 A CN200910118986 A CN 200910118986A CN 101572145 A CN101572145 A CN 101572145A
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- 238000000034 method Methods 0.000 claims abstract description 72
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- 239000000463 material Substances 0.000 claims abstract description 5
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- 239000010936 titanium Substances 0.000 claims description 15
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- 239000010955 niobium Substances 0.000 claims description 14
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- 239000000126 substance Substances 0.000 claims description 10
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- 239000006247 magnetic powder Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
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- 238000010891 electric arc Methods 0.000 claims description 7
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- 229910052691 Erbium Inorganic materials 0.000 claims description 6
- 229910052693 Europium Inorganic materials 0.000 claims description 6
- 229910052775 Thulium Inorganic materials 0.000 claims description 6
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 6
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
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- 229910001069 Ti alloy Inorganic materials 0.000 claims description 2
- 229910001080 W alloy Inorganic materials 0.000 claims description 2
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- 229910052796 boron Inorganic materials 0.000 description 12
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 11
- RKLPWYXSIBFAJB-UHFFFAOYSA-N [Nd].[Pr] Chemical compound [Nd].[Pr] RKLPWYXSIBFAJB-UHFFFAOYSA-N 0.000 description 8
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Abstract
The invention relates to a flaky rare earth permanent magnet powder and a preparation method thereof, belonging to the fields of magnetic functional material and preparation technology. The invention provides the flaky rare earth permanent magnet powder used for bonded permanent magnet and the preparation method thereof. The magnet powder has round, elliptic or irregular flakiness, the average size of 60-300mum, average thickness of 20-60mum and granules formed by nanocrystal or amorphous structure with the average size of 30-120nm. Compared with a rapid quenching belt, the magnet powder is not needed to be ground and can be directly used for preparing magnet. Molten alloy is atomized by high pressure gas to form droplet flow, the liquid drops are sputtered onto a water-cooling substrate for rapid quenching, and the magnet powder is prepared after crystallization heat treatment. Compared with the traditional rapid quenching technique for preparing powder, the method has simple technique, high efficiency and low cost.
Description
Technical field
The present invention relates to magnetic functional material and preparing technical field thereof, provide a kind of bonded permanent magnet with flaky rare earth permanent magnet powder and a kind of preparation method especially.
Background technology
Binding rare earth permanent magnet is to be mixed mutually with binding material by rare earth permanent-magnet powder, presses a kind of permanent magnetism device of direct injection of customer requirements or compression molding.Such magnet has dimensional accuracy height, magnetic good uniformity, easily is processed into advantages such as shape complex devices, is widely used in devices such as electrical micro-machine, automated office equipment, instrument and meter, magnetic machinery and the equipment.
The key of preparation bonded permanent magnet is exactly a rare earth permanent-magnet powder, and the performance of magnetic has directly determined the quality and the market price of bonded permanent magnet.At present, ripe binding rare earth permanent magnet is essentially isotropism bonding NdFeB magnet on the market, and its used most magnetic powders methods comprise several steps: 1 alloy melting; 2 fast quenchings get rid of band; 3 coarse crushings; 4 crystallization and thermal treatment.This magnetic powders complex process, technology controlling and process are very harsh, and production efficiency lower (50-60 kilogram/hour).
Mainly contain the US4496395 of General Motors application in 1981 about the foreign patent of isotropism RE permanent magnetic alloy, this patent disclosure a kind of high-coercive force, rare-earth-iron alloy and preparation technology thereof cheaply.The regulation alloying component is RE
1-xFe
x, x=0.2-0.7, and provided the preparation technology of fast quenched alloy.General Motors nineteen eighty-twos has been applied for patent US4851058, this patent disclosure a kind of rare-earth-iron-boron with high energy product and high remanent magnetism be alloy, and the regulation alloying component is RE
1-x(TM
1-yB
y) x, wherein 0.50≤x≤0.90,0.005≤y≤0.10.General Motors are applied for a patent US4802931 again US4851058 are replenished nineteen eighty-three subsequently, and the composition of alloy and the structure of crystal are illustrated and stipulate.General Motors had successively been applied for patent US5056585 and US5174362 again in 1985, two kinds of fast quenching permanent-magnet alloy preparation technologies are provided, and the composition of alloy is limited.The former has done the praseodymium neodymium content in boron and the rare earth especially and has stipulated (B:0.5-10at%, RE:10-50at%, Pr﹠amp; Nd/RE: 〉=60at%, TM: 〉=60at%), the latter has done and has stipulated (B: 〉=0.5at%, RE:10-50at%, Fe 〉=50at%) especially to the content of the iron in boron and the magnesium-yttrium-transition metal.General Motors in 1987 have been applied for a patent the US5172751 specified in more detail composition of RE permanent magnetic alloy and fast quenching, Technology for Heating Processing, the average grain size of regulation alloy is less than 50nm, and maximum crystal grain is less than 400nm, and heat treatment time is no more than 30min.In addition, the patent that relates to isotropic bonded magnet also has the US4902361 of General Motors application in 1986, and the US5411608 of Kollmorgen company application in 1993 and TDK company are successively in US4836868, US5049208, US5022939 and the US5209789 of application in 1987,1988,1989,1991.
Above-mentioned patent about rare earth alloy relates to the crystallite dimension of alloy except that US544728 and US5172751, and other does not all limit the size of crystal grain, and does not relate to the magnetic powder particle size and distribute, therefore, and the difference that has essence with this patent.This patent and patent US544728 and US5172751 difference in essence are that the object that this patent limits is a magnetic, not only define the average grain size of forming magnetic, and have stipulated shape, size and the distribution of particles of magnetic.Therefore, this patent and patent US544728 and US5172751 have obvious difference.Because, the size of being not only crystal grain of influence bonding magnetic particle capability, the shape of magnetic, granular size and distribution are also extremely important.In addition, the magnetic powders technology that provides of this patent also has obvious difference with above-mentioned patent.
Domestic patent about isotropism bonded rare earth permanent magnetic powder mainly contains: CN1171313 discloses a kind of aerosolization+HDDR legal system that adopts and has been equipped with the method for NdFeB alloy powder, and this patent preparation method still is that the magnetic feature all has essential distinction with this patent.CN1014688B discloses a kind of neodymium iron boron non-crystalline microcrystalline powder preparation method, and this patent is not done clear and definite qualification to characteristics such as the outward appearance of magnetic, crystal grain, and the preparation method also has obvious difference with this patent.CN1593820A discloses a kind of nano composite permanent magnetic powder and preparation method, though this patent has been done certain qualification to the average grain size size and the average grain diameter size of magnetic, but do not stipulate the particle size distribution of powder, and powder composition and preparation method and this patent also there is obvious difference.
Summary of the invention
The present invention is directed to many shortcomings of traditional isotropism bonding magnetic and preparation technology thereof, proposed a kind of brand-new rare earth permanent magnet powder and a kind of preparation technology that can be used for preparing bonded permanent magnet.
Flaky rare earth permanent magnet powder provided by the invention is characterized in that:
1, profile is circular, oval or erose sheet, and mean size is that 60-300 μ m, average thickness are 20-60 μ m;
2, particle is made of the nanocrystalline and amorphous structure of average-size 10-120nm;
3, particle is made of the nanocrystalline and amorphous structure of average-size 20-80nm;
4, particle accounts for ratio≤5.0% of gross weight greater than the magnetic of 400 μ m, and particle accounts for ratio≤10.0% of gross weight less than the magnetic of 30 μ m, and granular size accounts for ratio 〉=85.0% of gross weight at the magnetic of 30-400 μ m;
5, the magnetic chemical formula is: R
x(Fe
1-aM
a)
yB
11.8＜x＜3.0 wherein, 12.6＜y＜15.4,0＜a＜0.3, on behalf of at least a among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, the Lu, M, R represent at least a among Al, Si, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Zr, Nb, the Mo; Contain the cobalt of 1.5-9wt% in the preferred magnetic, can significantly increase Curie temperature;
6, the chemical formula of magnetic is: R
xTM
70.9＜x＜1.1 wherein, on behalf of at least a among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, the Lu, TM, R represent at least a among Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Zr, Nb, the Mo;
7, the chemical formula of magnetic is: R
xTM
171.8＜x＜2.5 wherein, on behalf of at least a among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, the Lu, TM, R represent at least a among Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Zr, Nb, the Mo;
8, the chemical formula of magnetic is: R
x(Fe
1-aM
a)
yB
1, 1.8＜x＜2.2,12.6＜y＜15.4,0＜a＜0.3 wherein, on behalf of at least a among Pr, Nd, Gd, Tb, Dy, the Ho, M, R represent at least a among Al, Co, Cu, Ga, Zr, the Nb;
9, the chemical formula of magnetic is: R
xTM
7, 0.9＜x＜1.1 wherein, R represents Sm, and TM represents at least a among Ti, Fe, Co, Cu, Ga, Zr, the Nb;
10, the chemical formula of magnetic is: R
xTM
17, 1.8＜x＜2.2 wherein, R represents Sm, and TM represents at least a among Ti, Fe, Co, Cu, Ga, Zr, the Nb;
The preparation method of a kind of rare earth permanent magnet powder provided by the invention is characterized in that:
1, contains atomizing fast quenching operation at least;
2, comprise melting, atomizing fast quenching, heat treatment step;
3, the alloy melting method can adopt any in induction melting, electric arc melting, the electronic torch melting;
4, the atomizing fast quenching is meant after gas by certain pressure is with atomized molten alloy and forms stream of liquid droplets, stream of liquid droplets splash fast quenching powder process to the cooling body.Its fast quenching speed is to coordinate control by distance, cooling body linear resonance surface velocity, cooling water temperature Several Parameters between control molten alloy temperature, molten alloy flow, gas pressure, gas temperature, nozzle and the cooling body.
5, atomizing fast quenching used gas is at least a in argon gas, nitrogen, the helium;
6, the used gas pressure of atomizing fast quenching is 1.5-5.5MPa;
7, atomizing fast quenching used cooling body be the flat board of disk, the vibration of wheel, the rotation of rotation, in the static flat board any, the wheel of preferred rotation, because the wheel surface linear velocity of rotation is fixed, technological parameter is more easy to control, and the wheel of high speed rotating also more help magnetic powder particle from it face break away from fully; The material of cooling body is at least a in copper, copper alloy, molybdenum, molybdenum alloy, iron, ferroalloy, tungsten, tungsten alloy, titanium, the titanium alloy, be preferably copper alloy and molybdenum alloy, because copper alloy and molybdenum alloy have good heat transfer property energy, thermal fatigue resistance, processability and suitable price;
8, the linear resonance surface velocity of the wheel of the used rotation of atomizing fast quenching is 1-45m/s;
9, the coolant of the used cooling body of atomizing fast quenching is at least a in water, liquid nitrogen, the oil, is optimized for water, because water not only has good heat-conducting, and low price;
10, heat treatment temperature is 600-900 ℃, and heat treatment time is 10-60min.
Magnetic disclosed by the invention is to form stream of liquid droplets by gases at high pressure after with atomized molten alloy, the direct splash of stream of liquid droplets fast quenching to the cooling body, wherein cooling body can be selected any in the dull and stereotyped or static flat board of wheel, high speed rotating disk, vibration of high speed rotating according to actual needs.The magnetic that obtains behind the atomizing fast quenching gets final product its crystallization through Overheating Treatment again.The difference of this magnetic and traditional powder by spraying essence is that it solidifies mainly and finishes that stream of liquid droplets has certain speed when splash is to cooling body on cooling body, drop collides and drawout on cooling body, forms the particle of sheet.The fast quenching thin strap method of comparing traditional prepares magnetic, and (throwing away width earlier is the strip of 3-5mm, thickness 30-50 μ m, coarse crushing after-baking again), the flaky rare earth permanent magnet powder that this invention provides, need not coarse crushing, can directly be used for preparing bonded permanent magnet, not only technology is simple, and efficient height and help improving the density and the magnetic property of bonded permanent magnet.Rare earth permanent magnet powder preparation technique provided by the invention can significantly be enhanced productivity, be generally 2-4kg/min, this technology is compared traditional fast quenched alloy band flouring technology (the about 1kg/min of production efficiency), and equipment investment is few, and technology is simple, efficient is high, cost is low.
In addition, flaky rare earth permanent magnet powder provided by the invention and traditional powder by spraying also have obvious difference, traditional powder by spraying, solidifying of its powder particle mainly is to finish in the process of spraying, i.e. cooling is the gas medium by flowing mainly, cooling effectiveness is not only low like this, and the magnetic of preparation is shaped as sphere or almost spherical.The key of powder process of the present invention is by parameters such as distances between suitable control gaseous flow velocity, nozzle and the cooling body, makes not solidify or the alloy liquid droplet splash of half curdled appearance forms the particle of sheet to the cooling body.
Figure of description
Fig. 1 is a kind of preparation method's schematic diagram of rare earth permanent magnet powder provided by the invention, and this schematic diagram helps to understand better the characteristics and the advantage of a kind of flaky rare earth permanent magnet powder of the present invention and preparation method thereof.Protection range of the present invention is not subjected to the restriction of this schematic diagram, and protection scope of the present invention is determined by claims.
(1) has the crucible of aperture for the bottom among the figure, and (2) are annular gases at high pressure nozzle, and (3) are the water-cooled copper alloy wheel of high speed rotating, and (4) are the rewinding storehouse, and (5) are gas cylinder.
Embodiment
Below the invention will be further described with example.Protection range of the present invention is not subjected to the restriction of these embodiment, and protection range of the present invention is determined by claims.
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of iron, cobalt, aluminium, copper, praseodymium neodymium alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the opening of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1420 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 3.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 20m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 30min.Final magnetic is analyzed each metal element content in the magnetic with plasmatron spectrographic analysis instrument (ICP) and X fluorescence spectrum analyzer (XRF), adopt ESEM (SEM) to observe magnetic average grain size and granular size, laser particle analyzer is measured granularity of magnet powder and is distributed, vibrating specimen magnetometer (VSM) is measured the main magnetic property of magnetic, and the result is as shown in table 1.
Table 1
The preparation method of present embodiment magnetic is: according to composition proportion similarly to Example 1, a certain proportion of iron, cobalt, aluminium, copper, praseodymium neodymium alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 1.0mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the opening of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1420 ℃ of molten steel temperatures, molten steel average discharge 1.1kg/min, high-pressure gas pressure 3.0MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 40cm, copper wheel linear resonance surface velocity 1m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 2.
Table 2
Embodiment 3
The preparation method of present embodiment magnetic is: according to composition proportion similarly to Example 1, a certain proportion of iron, cobalt, aluminium, copper, praseodymium neodymium alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 2.0mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the opening of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1420 ℃ of molten steel temperatures, molten steel average discharge 4.2kg/min, high-pressure gas pressure 5.0MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 50cm, copper wheel linear resonance surface velocity 45m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 3.
Table 3
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of iron, aluminium, copper, zirconium, gallium, praseodymium neodymium alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 2.0mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the opening of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1450 ℃ of molten steel temperatures, molten steel average discharge 4.0kg/min, high-pressure gas pressure 5.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 50cm, copper wheel linear resonance surface velocity 15m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 600 ℃ of heat treatment 45min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 2.
Table 4
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of iron, aluminium, copper, zirconium, gallium, praseodymium neodymium alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 2.0mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the opening of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1450 ℃ of molten steel temperatures, molten steel average discharge 4.0kg/min, high-pressure gas pressure 8.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 50cm, copper wheel linear resonance surface velocity 15m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 600 ℃ of heat treatment 45min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 2.
Table 5
Embodiment 6
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of iron, copper, zirconium, praseodymium neodymium alloy, Dy-Fe alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 1.0mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1400 ℃ of molten steel temperatures, molten steel average discharge 2.0kg/min, high-pressure gas pressure 3.0MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 20 ℃ of 40cm, copper wheel linear resonance surface velocity 25m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 900 ℃ of heat treatment 10min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 6.
Table 6
Embodiment 7
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of iron, niobium, copper, zirconium, gadolinium, holmium, neodymium-iron alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of electric arc melting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted melting power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1420 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 1.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 5m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 7.
Table 7
Embodiment 8
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of iron, gadolinium, holmium, neodymium-iron alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of electric arc melting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted melting power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1420 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 2.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 5m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 600 ℃ of heat treatment 60min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 8.
Table 8
Embodiment 9
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of iron, cobalt, aluminium, copper, zirconium, gallium, praseodymium neodymium alloy, ferro-boron are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion flow out from the opening of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1430 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 4.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 18m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 750 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 9.
Table 9
Embodiment 10
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, cobalt, iron, copper, zirconium are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1350 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 2.0MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 10m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 20min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 10.
Table 10
Embodiment 11
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, cobalt, titanium, iron are packed in the crucible, crucible bottom has the opening of Φ 1.0mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1350 ℃ of molten steel temperatures, molten steel average discharge 2.0kg/min, high-pressure gas pressure 2.0MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 40cm, copper wheel linear resonance surface velocity 20m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 20min.Final magnetic is used and is implemented
Example 1 same method is tested, is analyzed magnetic characteristic and main magnetic property, and the result is as shown in table 11.
Table 11
Embodiment 12
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, cobalt, iron, copper, zirconium are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1360 ℃ of molten steel temperatures, molten steel average discharge 2.50kg/min, high-pressure gas pressure 4.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 17m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 12.
Table 12
Embodiment 13
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, cobalt, iron, copper, zirconium are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of electric arc melting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted melting power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1350 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 2.0MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 20m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 20min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 13.
Table 13
Embodiment 14
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, cobalt, iron, copper, zirconium, titanium are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of electric arc melting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted melting power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1360 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 2.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 5m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 800 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed magnetic characteristic and main magnetic property with method similarly to Example 1, and the result is as shown in table 14.
Table 14
Embodiment 15
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, in a certain proportion of samarium, cobalt, iron, copper, zirconium, the crucible of packing into, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of electric arc melting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted melting power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1350 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 2.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 5m/s, cooling water temperatures.Fast quenching powder process finishes, and with similarly to Example 1 method test, analysis magnetic characteristic and main magnetic property, the result is as shown in Table 15.
Table 15
Embodiment 16
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, iron, copper, zirconium, niobium are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1420 ℃ of molten steel temperatures, molten steel average discharge 2.0kg/min, high-pressure gas pressure 3.0MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 20 ℃ of 40cm, copper wheel linear resonance surface velocity 25m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 30min.Final magnetic is analyzed each metal element content in the magnetic with plasmatron spectrographic analysis instrument (ICP) and X fluorescence spectrum analyzer (XRF), adopt ESEM (SEM) to observe magnetic average grain size and granular size, laser particle analyzer is measured granularity of magnet powder and is distributed, and the result is shown in table 16.
Table 16
Embodiment 17
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, iron, copper, zirconium, cobalt are packed in the crucible, crucible bottom has the opening of Φ 1.0mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out fully atomizes through gases at high pressure (Ar gas) nozzle of ring-type, forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1420 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 2.6MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 20m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed the magnetic characteristic with method similarly to Example 16, and the result is shown in table 17.
Table 17
Embodiment 18
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, iron, copper, zirconium, cobalt are packed in the crucible, crucible bottom has the opening of Φ 1.0mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out is through the gases at high pressure (N of ring-type
2Gas) nozzle fully atomizes, and forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1420 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 2.6MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 20m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 700 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed the magnetic characteristic with method similarly to Example 16, and the result is shown in table 18.
Table 18
Embodiment 19
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, iron, copper, zirconium, cobalt are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out is through the gases at high pressure (N of ring-type
2+ Ar gas) nozzle fully atomizes, and forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1450 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 3.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 5m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 800 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed the magnetic characteristic with method similarly to Example 16, and the result is shown in table 19.
Table 19
Embodiment 20
The preparation method of present embodiment magnetic is: according to the composition that designs in advance, a certain proportion of samarium, iron, copper, zirconium, cobalt, titanium are packed in the crucible, crucible bottom has the opening of Φ 1.5mm, and opening adopts special-purpose stopper rod to block between fusing and refining period.Adopt the mode of intermediate frequency (IF) smelting to melt, wait whole metal or alloy fully to melt after refining 5 minutes again, the refining back that finishes is adjusted intermediate frequency power and is made molten steel temperature remain on uniform temperature, again with the stopper rod pull-up, allows the molten steel of fusion from the outflow of crucible bottom.The molten steel that flows out is through the gases at high pressure (N of ring-type
2+ Ar gas) nozzle fully atomizes, and forms stream of liquid droplets, is directly injected to fast quenching powder process on the water-cooled copper wheel of high speed rotating.The fast quenching condition is in the present embodiment: between 1450 ℃ of molten steel temperatures, molten steel average discharge 2.5kg/min, high-pressure gas pressure 3.5MPa, 18 ℃ of gases at high pressure temperature, nozzle and the copper wheel apart from 25 ℃ of 45cm, copper wheel linear resonance surface velocity 1m/s, cooling water temperatures.Fast quenching powder process finishes, and magnetic carries out crystallization at 800 ℃ of heat treatment 30min.Final magnetic is tested, is analyzed the magnetic characteristic with method similarly to Example 16, and the result is shown in table 20.
Table 20
Claims (21)
1. flaky rare earth permanent magnet powder is characterized in that: profile is circular, oval or erose sheet, and mean size is that 60-300 μ m, average thickness are 20-60 μ m.
2. by the described flaky rare earth permanent magnet powder of claim 1, it is characterized in that: magnetic powder particle is made of the nanocrystalline and amorphous structure of average-size 10-120nm.
3. by the described flaky rare earth permanent magnet powder of claim 1, it is characterized in that: magnetic powder particle is made of the nanocrystalline and amorphous structure of average-size 20-80nm.
4. by the described flaky rare earth permanent magnet powder of claim 1, it is characterized in that: particle accounts for ratio≤5.0% of gross weight greater than the magnetic of 400 μ m, particle accounts for ratio≤10.0% of gross weight less than the magnetic of 30 μ m, and granular size accounts for ratio 〉=85.0% of gross weight at the magnetic of 30-400 μ m.
5. by the described flaky rare earth permanent magnet powder of claim 1, it is characterized in that: the composition of magnetic is: R
x(Fe
1-aM
a)
yB
11.8＜x＜3.0 wherein, 12.6＜y＜15.4,0＜a＜0.3, on behalf of at least a among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, the Lu, M, R represent at least a among Al, Si, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Zr, Nb, the Mo.
6. by the described flaky rare earth permanent magnet powder of claim 1, it is characterized in that: the composition of magnetic is: R
xTM
70.8＜x＜1.1 wherein, on behalf of at least a among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, the Lu, TM, R represent at least a among Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Zr, Nb, the Mo.
7. by the described flaky rare earth permanent magnet powder of claim 1, it is characterized in that: the chemical formula of magnetic is: R
xTM
171.8＜x＜2.5 wherein, on behalf of at least a among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, the Lu, TM, R represent at least a among Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Zr, Nb, the Mo.
8. by the described flaky rare earth permanent magnet powder of claim 5, it is characterized in that: the chemical formula of magnetic is: R
x(Fe
1-aM
a)
yB
1, 1.8＜x＜2.2,12.6＜y＜15.4,0＜a＜0.3 wherein, on behalf of at least a among Pr, Nd, Gd, Tb, Dy, the Ho, M, R represent at least a among Al, Co, Cu, Ga, Zr, the Nb.
9. by the described flaky rare earth permanent magnet powder of claim 6, it is characterized in that: the chemical formula of magnetic is: R
xTM
7, 0.9＜x＜1.1 wherein, R represents Sm, and TM represents at least a among Ti, Fe, Co, Cu, Ga, Zr, the Nb.
10. by the described flaky rare earth permanent magnet powder of claim 7, it is characterized in that: the chemical formula of magnetic is: R
xTM
17, 1.8＜x＜2.2 wherein, R represents Sm, and TM represents at least a among Ti, Fe, Co, Cu, Ga, Zr, the Nb.
11., it is characterized in that: the cobalt that contains 1.5-9wt% in the magnetic by the described flaky rare earth permanent magnet powder of claim 5.
12. the preparation method of the described flaky rare earth permanent magnet powder of claim 1 is characterized in that: contain atomizing fast quenching operation at least.
13., it is characterized in that comprising following steps by the described preparation method of claim 12:
A, melting;
B, atomizing fast quenching;
C, heat treatment.
14. by the described preparation method of claim 13, it is characterized in that: described melting is any in induction melting, electric arc melting, the electronic torch melting.
15. by claim 12 or 13 described preparation methods, it is characterized in that: described atomizing fast quenching is meant after gas by certain pressure is with atomized molten alloy and forms stream of liquid droplets, stream of liquid droplets splash fast quenching powder process to the cooling body.
16. by the described preparation method of claim 15, it is characterized in that: described gas is meant at least a in argon gas, nitrogen, the helium.
17. by the described preparation method of claim 15, it is characterized in that: described pressure is 1.5-8.5MPa.
18. by the described preparation method of claim 15, it is characterized in that: described cooling body is the flat board of disk, the vibration of wheel, the rotation of rotation, in the static flat board any; The material of described cooling body is at least a in copper, copper alloy, molybdenum, molybdenum alloy, iron, ferroalloy, tungsten, tungsten alloy, titanium, the titanium alloy.
19. by the described preparation method of claim 18, it is characterized in that: the linear resonance surface velocity of the wheel of described rotation is 1-45m/s.
20. the described preparation method of claim 15 is characterized in that: the used coolant of described cooling body is at least a in water, liquid nitrogen, the oil.
21. by the described preparation method of claim 13, it is characterized in that: described heat treatment temperature is 600-900 ℃, heat treatment time is 10-60min.
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| CN 200910118986 Pending CN101572145A (en) | 2009-01-21 | 2009-03-11 | Flaky rare earth permanent magnet powder and preparation method thereof |
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Cited By (13)
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| CN102456459A (en) * | 2010-10-20 | 2012-05-16 | 北京中科三环高技术股份有限公司 | Flexible magnet without magnetic powder falling and preparation method thereof |
| CN102861920A (en) * | 2012-10-17 | 2013-01-09 | 厦门大学 | Crystalline/amorphous composite powder and preparation method thereof |
| CN103475162A (en) * | 2013-07-20 | 2013-12-25 | 南通飞来福磁铁有限公司 | Preparation method for rare-earth permanent magnet used for energy-saving motor |
| CN103706770A (en) * | 2013-12-09 | 2014-04-09 | 北京工业大学 | Method for adopting belt spinning of disc-type single roller to prepare amorphous alloy thin belt |
| CN103785845A (en) * | 2014-01-21 | 2014-05-14 | 北京科技大学 | Preparation method of micro spherical Sm-Fe-N series permanent magnetic powder |
| CN105023685A (en) * | 2014-04-15 | 2015-11-04 | Tdk株式会社 | Magnet powder, bond magnet and motor |
| CN106856118A (en) * | 2015-12-08 | 2017-06-16 | 北京中科三环高技术股份有限公司 | The thinning method and bonded permanent magnet of nanocrystalline fast quenching rare-earth permanent-magnet material and its crystallite dimension |
| CN109585108A (en) * | 2017-09-28 | 2019-04-05 | 日立金属株式会社 | The manufacturing method of R-T-B based sintered magnet and diffusion source |
| CN109585152A (en) * | 2017-09-28 | 2019-04-05 | 日立金属株式会社 | The manufacturing method of R-T-B based sintered magnet and diffusion source |
| CN109585153A (en) * | 2017-09-28 | 2019-04-05 | 日立金属株式会社 | The manufacturing method of R-T-B based sintered magnet and diffusion source |
| CN112276105A (en) * | 2020-10-29 | 2021-01-29 | 佛山市中研非晶科技股份有限公司 | Water-gas combined atomization powder making process and water-gas combined atomization powder making system applying same |
| CN113724993A (en) * | 2021-08-26 | 2021-11-30 | 中国科学院江西稀土研究院 | Method for preparing regenerative diffusion magnet by using permanent magnet waste containing Ce |
| CN114309628A (en) * | 2021-01-15 | 2022-04-12 | 武汉科技大学 | FeSiBPNbCr amorphous magnetic powder and preparation method thereof |
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2009
- 2009-03-11 CN CN 200910118986 patent/CN101572145A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456459A (en) * | 2010-10-20 | 2012-05-16 | 北京中科三环高技术股份有限公司 | Flexible magnet without magnetic powder falling and preparation method thereof |
| CN102861920A (en) * | 2012-10-17 | 2013-01-09 | 厦门大学 | Crystalline/amorphous composite powder and preparation method thereof |
| CN103475162A (en) * | 2013-07-20 | 2013-12-25 | 南通飞来福磁铁有限公司 | Preparation method for rare-earth permanent magnet used for energy-saving motor |
| CN103475162B (en) * | 2013-07-20 | 2016-05-25 | 南通飞来福磁铁有限公司 | A kind of preparation method of the rare-earth permanent magnet for energy-saving electric machine |
| CN103706770A (en) * | 2013-12-09 | 2014-04-09 | 北京工业大学 | Method for adopting belt spinning of disc-type single roller to prepare amorphous alloy thin belt |
| CN103785845A (en) * | 2014-01-21 | 2014-05-14 | 北京科技大学 | Preparation method of micro spherical Sm-Fe-N series permanent magnetic powder |
| CN103785845B (en) * | 2014-01-21 | 2015-08-05 | 北京科技大学 | The preparation method of a kind of minute spherical Sm-Fe-N system permanent magnetism powder |
| CN105023685A (en) * | 2014-04-15 | 2015-11-04 | Tdk株式会社 | Magnet powder, bond magnet and motor |
| CN105023685B (en) * | 2014-04-15 | 2017-10-31 | Tdk株式会社 | Ferromagnetic powder, binding magnet and motor |
| CN106856118A (en) * | 2015-12-08 | 2017-06-16 | 北京中科三环高技术股份有限公司 | The thinning method and bonded permanent magnet of nanocrystalline fast quenching rare-earth permanent-magnet material and its crystallite dimension |
| CN109585108A (en) * | 2017-09-28 | 2019-04-05 | 日立金属株式会社 | The manufacturing method of R-T-B based sintered magnet and diffusion source |
| CN109585152A (en) * | 2017-09-28 | 2019-04-05 | 日立金属株式会社 | The manufacturing method of R-T-B based sintered magnet and diffusion source |
| CN109585153A (en) * | 2017-09-28 | 2019-04-05 | 日立金属株式会社 | The manufacturing method of R-T-B based sintered magnet and diffusion source |
| US10984930B2 (en) | 2017-09-28 | 2021-04-20 | Hitachi Metals, Ltd. | Method for producing sintered R—T—B based magnet and diffusion source |
| CN109585153B (en) * | 2017-09-28 | 2021-06-29 | 日立金属株式会社 | Manufacturing method and diffusion source of R-T-B based sintered magnet |
| US11062843B2 (en) | 2017-09-28 | 2021-07-13 | Hitachi Metals, Ltd. | Method for producing sintered R-T-B based magnet and diffusion source |
| CN109585152B (en) * | 2017-09-28 | 2021-09-21 | 日立金属株式会社 | Method for producing R-T-B sintered magnet and diffusion source |
| CN112276105A (en) * | 2020-10-29 | 2021-01-29 | 佛山市中研非晶科技股份有限公司 | Water-gas combined atomization powder making process and water-gas combined atomization powder making system applying same |
| CN114309628A (en) * | 2021-01-15 | 2022-04-12 | 武汉科技大学 | FeSiBPNbCr amorphous magnetic powder and preparation method thereof |
| CN113724993A (en) * | 2021-08-26 | 2021-11-30 | 中国科学院江西稀土研究院 | Method for preparing regenerative diffusion magnet by using permanent magnet waste containing Ce |
| CN113724993B (en) * | 2021-08-26 | 2024-06-04 | 赣州综保华瑞新材料有限公司 | Method for preparing regenerated diffusion magnet by using Ce-containing permanent magnet waste |
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