CN1255235C - Equipment for quick cooling thick alloy belt and preparation method using said equipment and its product - Google Patents
Equipment for quick cooling thick alloy belt and preparation method using said equipment and its product Download PDFInfo
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- CN1255235C CN1255235C CNB021041229A CN02104122A CN1255235C CN 1255235 C CN1255235 C CN 1255235C CN B021041229 A CNB021041229 A CN B021041229A CN 02104122 A CN02104122 A CN 02104122A CN 1255235 C CN1255235 C CN 1255235C
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 212
- 239000000956 alloy Substances 0.000 title claims abstract description 212
- 238000001816 cooling Methods 0.000 title claims abstract description 192
- 238000002360 preparation method Methods 0.000 title description 14
- 239000013078 crystal Substances 0.000 claims abstract description 60
- 229910001172 neodymium magnet Inorganic materials 0.000 claims abstract description 53
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000003860 storage Methods 0.000 claims abstract description 26
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 5
- 239000010941 cobalt Substances 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims description 64
- 230000008018 melting Effects 0.000 claims description 64
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 15
- 229910052786 argon Inorganic materials 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 3
- 229910000714 At alloy Inorganic materials 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 6
- 150000002910 rare earth metals Chemical class 0.000 abstract description 4
- 238000005204 segregation Methods 0.000 abstract description 4
- 230000006698 induction Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 78
- 229910000521 B alloy Inorganic materials 0.000 description 30
- 238000005516 engineering process Methods 0.000 description 14
- 238000005275 alloying Methods 0.000 description 11
- 229910052774 Proactinium Inorganic materials 0.000 description 10
- 238000012856 packing Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000005266 casting Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 229910052748 manganese Inorganic materials 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 229910052684 Cerium Inorganic materials 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 229910052746 lanthanum Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 240000007762 Ficus drupacea Species 0.000 description 1
- 241001329471 Mycobacterium phage Rich Species 0.000 description 1
- -1 and Co Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002389 environmental scanning electron microscopy Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The present invention relates to a device and a method for preparing thick alloy bands which can be quickly cooled, a thick alloy band which can be quickly cooled. The device comprises a furnace shell 4, an induction coil 1, a crucible 2, and an induction heating tundish 3 of which the bottom is provided with a nozzle, wherein a pair of rotary water cooling wheels 5 or one rotary water cooling wheel 5 is fixed on the lower part of the tundish, and a material collector, an air cooling device which is positioned beside the furnace shell for cooling thick bands, and a corresponding vacuum system are arranged below the rotary wheel. The present invention is suitable for producing thick alloy bands which can be quickly cooled, and the thick bands have the advantages of uniform components and tissue, small crystal grains, columnar crystals, no segregation, etc. The prepared neodymium-iron-boron thick bands which can be quickly cooled have the characteristics the bands have low or no a-Fe phases, and no zones of equiaxial crystals, main phases Nd2Fe14B are columnar crystals, rich neodymium phases are uniformly distributed, the volume percentage of the main phases Nd2Fe14B is high (generally larger than 95%), the total rare earth content is low, etc. The present invention is suitable for producing neodymium-iron-boron sintered magnets with high performance. The prepared thick bands which can be quickly cooled with low cobalt hydrogen storage alloy for batteries have the advantages of small full columnar crystal tissue, no segregation, no need of uniform heat treatment, and good combined performance.
Description
Technical field
The present invention relates to preparation method of a kind of quick cooling thick alloy carrying device and this equipment of employing and products thereof.
Background technology
Traditional alloy manufacturing process generally adopts melting, casting technique, is difficult to satisfy some functional material (as Sintered NdFeB magnet, hydrogen-storage alloy) requirement.Tradition melting, casting technique exist in following shortcoming:
1, alloy graining speed is low, and composition and microstructure segregation are serious, and crystal grain is thick;
2, each phase skewness in the alloy.
Tradition melting, casting technique show as following shortcoming concerning Sintered NdFeB magnet:
1, contains a large amount of a-Fe phases, Nd in the Nd Fe B alloys ingot casting
2Fe
14B principal phase content is low;
2, rich neodymium phase distributed pole is inhomogeneous in the alloy;
3, alloy graining speed is low, is difficult to reduce the total amount of rare earth in the Nd Fe B alloys;
4, be difficult to prepare the high-performance magnet.
Tradition melting, casting technique show as following shortcoming concerning hydrogen-storage alloy:
1, contain a large amount of rich Mn phases, rich Co phase in the hydrogen-storage alloy, and RE (Ni, M)
5Principal phase content is low, and wherein RE is a rare earth element, M=Mn, and Co, Al etc. add element;
2, noble element Nd, Co consumption are many, and alloy needs homogenising heat treatment cost height;
3, be difficult to prepare high-performance hydrogen-storage alloy.
Studies show that: adopt flash set technology can solve above-mentioned shortcoming.Present widely used vacuum quick quenching furnace, be mainly used to produce the quenched powder of amorphous or crystallite, as China Patent No. 92209624.4 disclosed a kind of vacuum quick quenching furnaces, prepare quenched powder by electric arc melting, its main part be the stainless steel double Shell water-cooled body of heater, electric arc melting, feed mechanism, get rid of band mechanism and collector.The vacuum quick quenching furnace of being announced as Japanese patent laid-open 2-24730,2-247310 and the clear 63-333829 of Te Kai and China Patent No. 97217372.2 all is the equipment that similarly is used for producing amorphous or crystallite quenched powder.As adopt this type of device fabrication Nd-Fe-B rare earth permanent magnetic material, and can only produce the fast quenching magnetic that is used for isotropic bonded magnet, this class vacuum quick quenching furnace is not suitable for preparing the quick-cooling thick band of casting sheet.
Summary of the invention
The purpose of this invention is to provide a kind of new equipment for preparing the high performance alloys quick-cooling thick band, both overcome the above-mentioned shortcoming of traditional melting one casting technique, again with alloy melting, get rid of and have machine and be combined in same the equipment, shortened manufacturing process, reduced production cost, improve alloy mass, be particularly suitable for suitability for industrialized production.
Another object of the present invention provides the new technology of preparation quick cooling thick alloy belt, with alloy melting, get rid of band and finish at same equipment.This technology is particularly suitable for suitability for industrialized production.
A further object of the present invention provides and adopts the quick cooling thick alloy belt of the made alloy structure of the said equipment and technology for evenly tiny full column crystal.
For achieving the above object, the present invention takes following technical scheme: this quick cooling thick alloy carrying device includes melting kettle, the eddy-current heating tundish of nozzle is equipped with in the bottom, be positioned at a pair of or single water-cooled runner of nozzle below, collector with quick-cooling thick band of cooling device, described collector is the bottom endomorph of furnace shell, and on being divided into by plate valve, following two Room, described cooling device is water cooling plant and air cooling system, water cooling plant is located at respectively, indoor down, and air cooling system is located at outside the furnace shell, be connected with following chamber, above-mentioned each device all is in the same furnace shell, and this furnace shell is connected with vacuum system.Adopt the said equipment can make alloy melting, cast, get rid of band and in same furnace shell, finish.
In equipment of the present invention, the diameter of described single water-cooled runner is that 150-800mm, width are 10-1200mm, the infinitely variable speeds in the 0.5-45m/s scope of the rotating speed of runner is adjustable, and is provided with and makes the axially movable transmission mechanism of runner, and is provided with scraper plate or polishing wheel in the side of runner; And described nozzle becomes 0-90 ° with gravity direction.
In equipment of the present invention, the diameter of described a pair of water-cooled runner is 150-800mm, and width is 10-1200mm, and the infinitely variable speeds in the 0.5-45m/s scope of the rotating speed of runner is adjustable, and is provided with in order to adjust this guiding mechanism to the gap of runner.
In equipment of the present invention, water cooling plant can be the water-cooled coil pipe; Air cooling equipment is connected with furnace shell by pipeline by air cooling system refrigeration machine, air cooling system compressor and forms.
In equipment of the present invention, vacuum system is by mechanical pump, lobe pump; Diffusion pump is connected with furnace shell by pipeline, valve respectively.
In equipment of the present invention, be connected to argon inlet pipe on the described furnace shell.
The process that adopts quick cooling thick alloy carrying device of the present invention to prepare quick cooling thick alloy belt comprises the steps:
(1) raw material that proportioning is good is packed in the melting kettle, shuts the fire door of furnace shell, and the cool cycles penstock of opening the water-cooled runner supplies water, and starts vacuum system, treat that vacuum reaches required value in the stove after, in furnace shell, charge into a certain amount of argon gas;
(2) with raw material melting in melting kettle, form the alloy liquation and keep 200-300 ℃ the degree of superheat, simultaneously tundish and nozzle are heated, to form required alloy liquation then is poured directly in the tundish, the alloy liquation flows on the water-cooled runner by the nozzle of tundish, get rid of into quick cooling thick alloy belt, in ℃ temperature range of alloy melting point～800, the cooldown rate of quick cooling thick alloy belt is 100.0-1000.0 ℃/s;
(3) by the quick cooling thick alloy belt that throws away on the water-cooled runner, drop into and continue cooling on the collector, in 800.0-600.0 ℃ of temperature range, the cooldown rate of quick cooling thick alloy belt is 0.1-1.0 ℃/s at alloy melting point, be cooled to after the room temperature discharging in the furnace shell, promptly make quick cooling thick alloy belt.
In the method for the invention, in described step (2), when described water-cooled runner was single, the rotating speed by adjusting the water-cooled runner was with the thickness of control quick cooling thick alloy belt, and its range of speed control is 0.5-45.0m/s; When described water-cooled runner was a pair of, the gap by adjusting two runners was with the thickness of control quick cooling thick alloy belt; The THICKNESS CONTROL of quick cooling thick alloy belt is 0.1-2.0mm.
Adopt the made quick cooling thick alloy belt of process of the present invention, this quick cooling thick alloy belt composition is even, and microscopic structure is even, is full columnar crystal structure, and the column crystal width is 0.2-40 μ m, length 1.0-200 μ m.
Adopt the made quick-cooling thick neodymium-iron-boron alloy belt of process of the present invention, this quick-cooling thick neodymium-iron-boron alloy belt has no a-Fe mutually or a-Fe very low, no equiax crystal district, principal phase Nd mutually
2Fe
14B is a column crystal, and rich neodymium is evenly distributed mutually, Nd
2Fe
14B principal phase volume is greater than 95%.
Adopt the made low-nd and low-cobalt hydrogen-storage alloy quick-cooling thick band of process of the present invention, this battery has tiny full columanar structure, segregation-free with low-nd and low-cobalt hydrogen-storage alloy quick-cooling thick band.
Description of drawings
The quick cooling thick alloy belt of Fig. 1 single water-cooled runner for the present invention has prepares the equipment schematic diagram
The quick cooling thick alloy belt of Fig. 2 a pair of water-cooled runner for the present invention has prepares the environment division structural representation
The quick-cooling thick neodymium-iron-boron alloy belt metallograph (parallel and zone face direction) of Fig. 3 for adopting the preparation of technology of the present invention and equipment
Fig. 4 is for adopting quick-cooling thick neodymium-iron-boron alloy belt ESEM (SEM) photo of technology of the present invention and equipment preparation
Fig. 5 is the quick-cooling thick neodymium-iron-boron alloy belt energy spectrogram that adopts technology of the present invention and equipment preparation
Fig. 6 is the hydrogen-storage alloy quick-cooling thick band metallograph (perpendicular to the zone face direction, amplifying 400 times) that adopts technology of the present invention and equipment preparation.
The specific embodiment
Quick cooling thick alloy carrying device of the present invention as shown in Figure 1 and Figure 2.In furnace shell 4, from top to bottom be provided with successively by melting kettle 2, the bottom of induction coil 1 heating be equipped with nozzle 17 eddy-current heating tundish 3, be positioned at the single or a pair of water-cooled runner 5 below the nozzle 17, the collector of quick-cooling thick band.Wherein, collector is the bottom endomorph of furnace shell 4, is divided into upper and lower two Room by plate valve 16, and upper and lower two Room are respectively equipped with water-cooled coil pipe 7, and the water inlet 11 of water-cooled coil pipe 7, delivery port 8 can be connected with furnace shell 4 water inlet pipe, outlet pipe outward respectively.Following chamber also connects air cooling system, and air cooling system connects air cooling system refrigeration machine 9, air cooling system compressor 10 successively by pipeline and forms.Furnace shell 4 connects vacuum system, and vacuum system includes lobe pump 13, diffusion pump 14, mechanical pump 15.Be divided into two-way after connecting mechanical pump 15, lobe pump 13 successively by pipeline, the one tunnel connects the top that valve 18 and a road of diffusion pump 14, valve 12 connect furnace shell 4 altogether; Another road connects down the chamber by valve 19.This vacuum system can be to carrying out pumping high vacuum in the whole furnace shell 4.
As shown in Figure 1, the melting kettle 2 10-1000 kilogram of can feeding, melting power of selecting for use and frequency are determined according to what of batch.Melting kettle 2 batches are few more, and the frequency of then selecting for use is high more, and power is then more little; Melting kettle 2 batches are many more, and the frequency of then selecting for use is low more, and power is big more.The crucible that tundish 3 is selected for use generally is not more than melting kettle 2, generally selects intermediate frequency and suitable power during melting for use, and a water conservancy diversion nozzle 17 is arranged at tundish 3 bottoms, and nozzle 17 outlets are flat and are furnished with high frequency electric source and heat.It is that 1w/cm degree or above material are made that water-cooled runner 5 (Fig. 1) or 5 (Fig. 2) adopt thermal conductivity, and inner logical cooling water carries out water-cooled; Motion mode can be to rotate (linear velocity can infinitely variable speeds), also can be to rotate+axially translation.For single water-cooled runner, scraper plate or polishing wheel 10 can scrape off the alloy that sticks on the wheel face and water-cooled runner cooling surface is polished, and what guarantee to get rid of band normally carries out quality with quick cooling thick alloy belt.Water-cooled coil pipe 7 and air cooling system are adopted in the follow-up cooling of quick cooling thick alloy belt.
Quick cooling thick alloy belt preparation technology of the present invention is as follows: by the alloying component proportion raw material, pack in the melting kettle 2, close fire door; Opening each cool cycles penstock supplies water; Start vacuum system, treat that vacuum reaches required value in the stove after, in stove, charge into a certain amount of argon gas; Select for use suitable frequency and power to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃); Select for use suitable frequency and power to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2); Linear velocity is adjustable continuously in the 0.5-45m/s scope, and motion mode can be independent rotation, also can be to rotate+axially translation; By regulating the rotating speed control cooldown rate of water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2), can reach the thickness (being generally 0.1-2.0mm) of control quick cooling thick alloy belt.By the quick cooling thick alloy belt that the water-cooled runner throws away, further cool off the last chamber that falls into collector, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In getting rid of the band process, alloy melting point is in 700-800 ℃ temperature range, and the cooling velocity of quick cooling thick alloy belt is 100-1000 ℃/s; In 800-600 ℃ scope, the cooling velocity of quick cooling thick alloy belt is 0.1-1.0 ℃/s.
The present invention organically combines quick cooling thick alloy belt preparation technology and equipment, can produce multiple quick cooling thick alloy belt.Fig. 3 is respectively quick-cooling thick neodymium-iron-boron alloy belt metallograph (parallel and zone face direction) and the SEM photo that adopts technology of the present invention and equipment preparation with Fig. 4.From Fig. 3 and Fig. 4 as can be seen, the neodymium iron boron quick-cooling thick band is made up of the column crystal that is arranged in parallel, no equiax crystal zone.Main frame Nd
2Fe
14The column crystal width of B is 1.0-3.5 μ m, length 50-200 μ m.Rich neodymium is uniformly distributed between the parallel column crystal mutually, and its width is less than 1.0 μ m, length 50-200 μ m.Fig. 5 is a quick-cooling thick neodymium-iron-boron alloy belt energy spectrogram, has shown no a-Fe phase in the thick band.The neodymium iron boron quick-cooling thick band that the present invention produces is specially adapted to make magnetic energy product (BH)
MaxBe the sintered magnet more than the 50MGOe and two high (high energy product, high-coercive force) sintered magnet.Fig. 6 is the hydrogen-storage alloy quick-cooling thick band metallograph (perpendicular to the zone face direction) that adopts technology of the present invention and equipment preparation.As can be seen from Figure 6, hydrogen-storage alloy quick-cooling thick band quick-cooling thick band is made up of tiny, uniform column crystal, and the crystal grain width is 2-2.5 μ m, length 100-200 μ m, no composition and microstructure segregation.The hydrogen-storage alloy quick-cooling thick band that the present invention produces is particularly suitable for making high-performance, low-cost electrokinetic cell and secondary baby battery.
In sum, quick cooling thick alloy belt compact equipment of the present invention, with alloy melting with get rid of the oxygen content and other impurity contents that have machine and combined, reduced quick cooling thick alloy belt, improved production efficiency and product quality, be particularly suitable for suitability for industrialized production; Quick cooling thick alloy belt preparation technology of the present invention has overcome the shortcoming of traditional melting one casting technique, mainly shows and has improved alloy graining speed, obtains the quick cooling thick alloy belt of full columnar crystal structure, and composition, tissue are evenly distributed mutually with each.
The present invention is applied to make quick-cooling thick neodymium-iron-boron alloy belt and has the following advantages:
1, can improve the cooldown rate of alloy, a-Fe is zero or ultralow a-Fe phase content mutually in the alloy;
2, can reduce the total amount of rare earth of alloy, improve principal phase Nd
2Fe
14B content;
3, alloy structure is even tiny full column crystal, principal phase Nd
2Fe
14B, rich Nd are evenly distributed mutually with richness mutually;
4, be fit to make performance Nd Fe B sintered magnet.
The present invention is applied to make the hydrogen-storage alloy quick-cooling thick band and has the following advantages:
1, can improve the cooldown rate of alloy, rich Mn phase, rich Co are zero or ultralow rich Mn phase, rich Co phase content mutually in the alloy;
2, can reduce Co, Nd consumption, and principal phase RE (Ni, M)
5The content height, wherein RE is a rare earth element, M=Mn, Co, Al etc. add element;
3, the capacitance of alloy, life-span and stability increase substantially;
4, alloy does not need homogenising heat treatment, has reduced production cost.
Below be further described with the preparation of the right quick cooling thick alloy belt of embodiment, will help the method for making and the equipment of quick cooling thick alloy belt of the present invention are done better to understand.Protection domain of the present invention is not subjected to the qualification of these embodiment, and protection scope of the present invention is determined by claims.
Embodiment 1
The quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, its alloying component Nd30% percetage by weight, B1.1% percetage by weight, surplus are Fe.By institute definitely composition carry out 30 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 2500Hz and power 45kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 30kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) and water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 150mm, width 10mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 0.5m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 5 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 17 is 0 ° of angle with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner has got rid of, to go out tape speed be 10 kilograms/hour.Quick-cooling thick neodymium-iron-boron alloy belt falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 950 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of Nd Fe B alloys is 1.0 ℃/s.The fast cold belt of the resulting Nd Fe B alloys of present embodiment, a-Fe are zero mutually, do not find the equiax crystal district, principal phase Nd
2Fe
14B crystal grain is the column crystal that is arranged in parallel, its width 2.5-3.0 μ m, and length 50.0-150.0 μ m, rich neodymium is along principal phase Nd
2Fe
14Parallel distribution between the B column, its width are less than 1.0 μ m, and length 50.0-150.0 μ m, rich neodymium are 0.5 μ m equiax crystal mutually, are uniformly distributed in the whole neodymium iron boron quick-cooling thick band thickness 0.20-0.25mm of its quick-cooling thick band.Quick-cooling thick neodymium-iron-boron alloy belt principal phase Nd
2Fe
14B is 98%.
Embodiment 2
The quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, its alloying component Nd30% percetage by weight, B1.1% percetage by weight, surplus are Fe.By institute definitely composition carry out 100 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 2400Hz and power 80kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 35kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 25 (Fig. 2) diameter 300mm, width 50mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 10m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 5 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 17 is 30 ° of angles with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 50 kilograms/hour.Quick-cooling thick neodymium-iron-boron alloy belt falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 850 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of Nd Fe B alloys is 0.9 ℃/s.The resulting quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, a-Fe are zero mutually, do not find the equiax crystal district, principal phase Nd
2Fe
14B crystal grain is the column crystal that is arranged in parallel, its width 3.0-3.5 μ m, and length 50.0-150.0 μ m, rich neodymium is along principal phase Nd
2Fe
14Parallel distribution between the B column, its width are less than 1.0 μ m, and length 50.0-150.0 μ m, rich neodymium are 0.5 μ m equiax crystal mutually, are uniformly distributed in the whole neodymium iron boron quick-cooling thick band thickness 0.25-0.40mm of its quick-cooling thick band.Quick-cooling thick neodymium-iron-boron alloy belt principal phase Nd
2Fe
14B is 98%.
Embodiment 3
The quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, its alloying component Nd30% percetage by weight, B1.1% percetage by weight, surplus are Fe.By institute definitely composition carry out 200 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 2300Hz and power 140kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 40kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 450mm, width 100mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 25 (Fig. 2) linear velocity are 15m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 5 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 17 is 45 ° of angles with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 200 kilograms/hour.Quick-cooling thick neodymium-iron-boron alloy belt falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 800 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of Nd Fe B alloys is 1.0 ℃/s.The resulting quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, a-Fe are zero mutually, do not find the equiax crystal district, principal phase Nd
2Fe
14B crystal grain is the column crystal that is arranged in parallel, its width 3.0 μ m, and length 50.0-150.0 μ m, rich neodymium is along principal phase Nd
2Fe
14Parallel distribution between the B column, its width are less than 1.0 μ m, and length 50.0-150.0 μ m, rich neodymium are 0.5 μ m equiax crystal mutually, are uniformly distributed in the whole neodymium iron boron quick-cooling thick band thickness 0.35-0.40mm of its quick-cooling thick band.Quick-cooling thick neodymium-iron-boron alloy belt principal phase Nd
2Fe
14B is 98%.
Embodiment 4
The quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, its alloying component Nd30% percetage by weight, B1.1% percetage by weight, surplus are Fe.By institute definitely composition carry out 400 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 1600Hz and power 200kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 45kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 600mm, width 200mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 20m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 5 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 33 is 60 ° of angles with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 500 kilograms/hour.Quick-cooling thick neodymium-iron-boron alloy belt falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 600 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of Nd Fe B alloys is 1.0 ℃/s.The resulting quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, a-Fe are zero mutually, do not find the equiax crystal district, principal phase Nd
2Fe
14B crystal grain is the column crystal that is arranged in parallel, its width 3.0-3.5 μ m, and length 50.0-150.0 μ m, rich neodymium is along principal phase Nd
2Fe
14Parallel distribution between the B column, its width are less than 1.0 μ m, and length 50.0-150.0 μ m, rich neodymium are 0.5 μ m equiax crystal mutually, are uniformly distributed in the whole neodymium iron boron quick-cooling thick band thickness 0.4mm of its quick-cooling thick band.Quick-cooling thick neodymium-iron-boron alloy belt principal phase Nd
2Fe
14B is 98%.
Embodiment 5
The quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, its alloying component Nd30% percetage by weight, B1.1% percetage by weight, surplus are Fe.By institute definitely composition carry out 600 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 1400Hz and power 450kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 50kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 650mm, width 400mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 25m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 5 (Fig. 2) of rotation by water conservancy diversion nozzle 33.Nozzle 17 is 75 ° of angles with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 700 kilograms/hour.Quick-cooling thick neodymium-iron-boron alloy belt falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 500 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of Nd Fe B alloys is 1.0 ℃/s.The resulting quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, a-Fe are zero mutually, do not find the equiax crystal district, principal phase Nd
2Fe
14B crystal grain is the column crystal that is arranged in parallel, its width 3.0-3.5 μ m, and length 50.0-150.0 μ m, rich neodymium is along principal phase Nd
2Fe
14Parallel distribution between the B column, its width are less than 1.0 μ m, and length 50.0-150.0 μ m, rich neodymium are 0.5 μ m equiax crystal mutually, are uniformly distributed in the whole neodymium iron boron quick-cooling thick band thickness 0.35-0.4mm of its quick-cooling thick band.Quick-cooling thick neodymium-iron-boron alloy belt principal phase Nd
2Fe
14B is 98%.
Embodiment 6
The quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, its alloying component Nd30% percetage by weight, B1.1% percetage by weight, surplus are Fe.By institute definitely composition carry out 800 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 1000Hz and power 600kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 50kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 800mm, width 600mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 30m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 25 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 17 is 90 ° of angles with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 800 kilograms/hour.Quick-cooling thick neodymium-iron-boron alloy belt falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 600 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of Nd Fe B alloys is 1.0 ℃/s.The resulting quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, minute quantity a-Fe phase is not found the equiax crystal district, principal phase Nd
2Fe
14B crystal grain is the column crystal that is arranged in parallel, its width 3.0-0.4 μ m, and length 50.0-150.0 μ m, rich neodymium is along principal phase Nd
2Fe
14Parallel distribution between the B column, its width are less than 1.0 μ m, and length 50.0-150.0 μ m, rich neodymium are 0.5 μ m equiax crystal mutually, are uniformly distributed in the whole neodymium iron boron quick-cooling thick band thickness 1.0mm of its quick-cooling thick band.Quick-cooling thick neodymium-iron-boron alloy belt principal phase Nd
2Fe
14B is 98%.
Embodiment 7
The quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, its alloying component Nd30% percetage by weight, B1.1% percetage by weight, surplus are Fe.By institute definitely composition carry out 1000 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 900Hz and power 900kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency and power to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 850mm, width 1100mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 40m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 5 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 17 is 60 ° of angles with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 1000 kilograms/hour.Quick-cooling thick neodymium-iron-boron alloy belt falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 700 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of Nd Fe B alloys is 1.0 ℃/s.The resulting quick-cooling thick neodymium-iron-boron alloy belt of present embodiment, a spot of a-Fe phase is not found the equiax crystal district, principal phase Nd
2Fe
14B crystal grain is the column crystal that is arranged in parallel, its width 4.0 μ m, and length 50.0-150.0 μ m, rich neodymium is along principal phase Nd
2Fe
14Parallel distribution between the B column, its width are less than 1.0 μ m, and length 50.0-150.0 μ m, rich neodymium are 0.5 μ m equiax crystal mutually, are uniformly distributed in the whole neodymium iron boron quick-cooling thick band thickness 1.5mm of its quick-cooling thick band.Quick-cooling thick neodymium-iron-boron alloy belt principal phase Nd
2Fe
14B is 98%.
Embodiment 8
The hydrogen-storage alloy quick-cooling thick band of present embodiment, its alloying component La20% percetage by weight, the La-Ce12% percetage by weight, the La-Nd8% percetage by weight, the Co5.0% percetage by weight, the Mn3.9% percetage by weight, Al1.9% percetage by weight, surplus are Ni.By institute definitely composition carry out 100 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 2300Hz and power 80kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 35kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 600mm, width 600mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 30m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 5 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 17 is 0 ° of angle with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 300 kilograms/hour.The hydrogen-storage alloy quick-cooling thick band falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 850 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of hydrogen-storage alloy is 1.0 ℃/s.The resulting hydrogen-storage alloy quick-cooling thick band of present embodiment, rich Mn are zero with rich Co mutually mutually, do not find the equiax crystal district, and principal phase (La, Nd, Ce)
1(Ni, Co, Mn, Al)
5Crystal grain is the column crystal that is arranged in parallel, its width 1.5-2.0 μ m, length 50.0-100.0 μ m, the thickness 0.20-0.25mm of its quick-cooling thick band.
Embodiment 9
The hydrogen-storage alloy quick-cooling thick band of present embodiment, its alloying component La20% percetage by weight, the La-Ce12% percetage by weight, the La-Nd8% percetage by weight, the Co5.0% percetage by weight, the Mn3.9% percetage by weight, Al1.9% percetage by weight, surplus are Ni.By institute definitely composition carry out 500 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 1500Hz and power 400kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 50kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 800mm, width 1000mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 40m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 17 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 17 is 0 ° of angle with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 800 kilograms/hour.The hydrogen-storage alloy quick-cooling thick band falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 400 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of hydrogen-storage alloy is 1.0 ℃/s.The resulting hydrogen-storage alloy quick-cooling thick band of present embodiment, rich Mn are zero with rich Co mutually mutually, do not find the equiax crystal district, and principal phase (La, Nd, Ce)
1(Ni, Co, Mn, Al)
5Crystal grain is the column crystal that is arranged in parallel, its width 4.0-4.5 μ m, length 50.0-100.0 μ m, the thickness 1.5mm of its quick-cooling thick band.
Embodiment 10
The hydrogen-storage alloy quick-cooling thick band of present embodiment, its alloying component La20% percetage by weight, the La-Ce12% percetage by weight, the La-Nd8% percetage by weight, the Co5.0% percetage by weight, the Mn3.9% percetage by weight, Al1.9% percetage by weight, surplus are Ni.By institute definitely composition carry out 900 kilograms of proportionings, the melting kettle 2 of packing into shuts fire door, opens each cool cycles penstock and supplies water.Start vacuum system, treat that vacuum reaches 10 in the stove
-2Behind the Pa, in stove, charge into 0.5 atmospheric argon gas.Select for use suitable frequency 1000Hz and power 800kW to carry out alloy melting, form the alloy liquation and keep certain degree of superheat (200-300 ℃).Select for use suitable frequency 2500Hz and power 50kW to heat to tundish 3, simultaneously water conservancy diversion nozzle 17 is carried out high-frequency heating, guarantee that the alloy liquation can flow to water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) smoothly.Water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) diameter 800mm, width 800mm, water-cooled runner 5 (Fig. 1) or water-cooled runner 5 (Fig. 2) linear velocity are 20m/s.Overheated alloy liquation is poured tundish 3 into by melting kettle 2 and is flow to the water-cooled runner 5 (Fig. 1) or the water-cooled runner 5 (Fig. 2) of rotation by water conservancy diversion nozzle 17.Nozzle 17 is 0 ° of angle with gravity direction.By the quick cooling thick alloy belt that the water-cooled runner throws away, going out tape speed is 600 kilograms/hour.The hydrogen-storage alloy quick-cooling thick band falls into the last chamber of collector and further cools off, and the quick cooling thick alloy belt of last chamber reaches certain degree, opens plate valve 16, and the thick band that is in the chamber enters down the chamber and is cooled to room temperature.In the temperature range of Nd Fe B alloys fusing point～800 ℃, the speed of Nd Fe B alloys cooling is 600 ℃/s, and in 800-600 ℃ temperature range, the cooldown rate of hydrogen-storage alloy is 1.0 ℃/s.The resulting hydrogen-storage alloy quick-cooling thick band of present embodiment, rich Mn are zero with rich Co mutually mutually, do not find the equiax crystal district, and principal phase (La, Nd, Ce)
1(Ni, Co, Mn, Al)
5Crystal grain is the column crystal that is arranged in parallel, its width 5.0-5.5 μ m, length 50.0-100.0 μ m, the thickness 0.20mm of its quick-cooling thick band.
Claims (8)
1, a kind of quick cooling thick alloy carrying device, it is characterized in that: this equipment includes melting kettle, the eddy-current heating tundish of nozzle is equipped with in the bottom, be positioned at a pair of or single water-cooled runner of nozzle below, collector with quick-cooling thick band of cooling device, described collector is the bottom endomorph of furnace shell, and on being divided into by plate valve, following two Room, described cooling device is water cooling plant and air cooling system, water cooling plant is located at respectively, indoor down, and air cooling system is located at outside the furnace shell, be connected with following chamber, above-mentioned each device all is in the same furnace shell, and this furnace shell is connected with vacuum system.
2, quick cooling thick alloy carrying device according to claim 1, it is characterized in that: the diameter of described single water-cooled runner is that 150-800mm, width are 10-1200mm, the infinitely variable speeds in the 0.5-45m/s scope of the rotating speed of runner is adjustable, and be provided with and make the axially movable transmission mechanism of runner, and be provided with scraper plate or polishing wheel in the side of runner; And described nozzle becomes 0-90 ° with gravity direction.
3, quick cooling thick alloy carrying device according to claim 1, it is characterized in that: the diameter of described a pair of water-cooled runner is 150-800mm, width is 10-1200mm, the infinitely variable speeds in the 0.5-45m/s scope of the rotating speed of runner is adjustable, and is provided with in order to adjust this guiding mechanism to the gap of runner.
4, a kind of process that adopts the described equipment of claim 1 to prepare quick cooling thick alloy belt, it is characterized in that: this method comprises the steps:
(1) raw material that proportioning is good is packed in the melting kettle, shuts the fire door of furnace shell, and the cool cycles penstock of opening the water-cooled runner supplies water, and starts vacuum system, treat that vacuum reaches required value in the stove after, in furnace shell, charge into a certain amount of argon gas;
(2) with raw material melting in melting kettle, form the alloy liquation and keep 200-300 ℃ the degree of superheat, simultaneously tundish and nozzle are heated, to form required alloy liquation then is poured directly in the tundish, the alloy liquation flows on the water-cooled runner by the nozzle of tundish, get rid of into quick cooling thick alloy belt, in ℃ temperature range of alloy melting point～800, the cooldown rate of quick cooling thick alloy belt is 100.0-1000.0 ℃/s;
(3) by the quick cooling thick alloy belt that throws away on the water-cooled runner, drop into and continue cooling on the collector, in 800.0-600.0 ℃ of temperature range, the cooldown rate of quick cooling thick alloy belt is 0.1-1.0 ℃/s at alloy melting point, be cooled to after the room temperature discharging in the furnace shell, promptly make quick cooling thick alloy belt.
5, process according to claim 4 is characterized in that: in described step (2), when described water-cooled runner was single, the rotating speed by adjusting the water-cooled runner was with the thickness of control quick cooling thick alloy belt, and its range of speed control is 0.5-45.0m/s; When described water-cooled runner was a pair of, the gap by adjusting two runners was with the thickness of control quick cooling thick alloy belt; The THICKNESS CONTROL of quick cooling thick alloy belt is 0.1-2.0mm.
6, a kind of made quick cooling thick alloy belt of process that adopts claim 4 or 5, it is characterized in that: this quick cooling thick alloy belt composition is even, and microscopic structure is even, is full columnar crystal structure, and the column crystal width is 0.2-40 μ m, length 1.0-200 μ m.
7, a kind of made quick-cooling thick neodymium-iron-boron alloy belt of process that adopts claim 4 or 5 is characterized in that: this quick-cooling thick neodymium-iron-boron alloy belt has no a-Fe mutually or a-Fe very low, no equiax crystal district, principal phase Nd mutually
2Fe
14B is a column crystal, and rich neodymium is evenly distributed mutually, Nd
2Fe
14B principal phase volume is greater than 95%.
8, a kind of made battery of process low-nd and low-cobalt hydrogen-storage alloy quick-cooling thick band that adopts claim 4 or 5, it is characterized in that: this battery has tiny full columanar structure, segregation-free with low-nd and low-cobalt hydrogen-storage alloy quick-cooling thick band.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021041229A CN1255235C (en) | 2002-03-06 | 2002-03-06 | Equipment for quick cooling thick alloy belt and preparation method using said equipment and its product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021041229A CN1255235C (en) | 2002-03-06 | 2002-03-06 | Equipment for quick cooling thick alloy belt and preparation method using said equipment and its product |
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| CN1442253A CN1442253A (en) | 2003-09-17 |
| CN1255235C true CN1255235C (en) | 2006-05-10 |
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| CN101342594B (en) | 2007-07-12 | 2011-04-06 | 北京中科三环高技术股份有限公司 | Manufacturing apparatus for alloy slice |
| CN101993994B (en) * | 2010-11-29 | 2012-08-08 | 苏州中门子科技有限公司 | Water cooling device arranged on strip thermal treatment equipment |
| JP5880569B2 (en) | 2011-10-13 | 2016-03-09 | Tdk株式会社 | R-T-B type alloy flake, method for producing the same, and method for producing R-T-B type sintered magnet |
| CN103801667B (en) * | 2012-11-08 | 2016-01-06 | 沈阳中北真空科技有限公司 | RE permanent magnetic alloy vacuum induction melting rapid hardening equipment |
| CN108257752B (en) * | 2016-12-29 | 2021-07-23 | 北京中科三环高技术股份有限公司 | Alloy casting sheet for preparing fine-grain rare earth sintered magnet |
| CN106887322B (en) * | 2017-03-03 | 2018-03-30 | 北京科技大学 | A kind of method of high-efficiency production of nano crystalline substance rare earth permanent magnet powder |
| CN113134583A (en) * | 2021-03-29 | 2021-07-20 | 江苏普隆磁电有限公司 | Get rid of piece neodymium iron boron and get rid of two-sided cold crystallization structure of area |
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