CN203197218U - Vacuum induction melting rapid quenching device under effect of magnetic field - Google Patents
Vacuum induction melting rapid quenching device under effect of magnetic field Download PDFInfo
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- CN203197218U CN203197218U CN 201220748191 CN201220748191U CN203197218U CN 203197218 U CN203197218 U CN 203197218U CN 201220748191 CN201220748191 CN 201220748191 CN 201220748191 U CN201220748191 U CN 201220748191U CN 203197218 U CN203197218 U CN 203197218U
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Abstract
The utility model discloses a vacuum induction melting rapid quenching device under the effect of a magnetic field. The vacuum induction melting rapid quenching device comprises an alloy melting rapid quenching device and a magnetic field processing device. The technical effect is that two alloy preparation methods of magnetic filed processing and fast cooling are combined, and an alloy with good comprehensive electrochemistry performance can be manufactured. The two alloy preparation methods of the magnetic filed processing and the fast cooling are combined, the magnetic field acts on a moving state of alloy electrons through a field form to provide energy for the alloy electrons, a crystal lattice growing condition is affected in a rapid quenching process of a melting alloy, a relatively stable environment is provided for crystal growing, the problems of more crystal lattice defects, large stress and the like caused by a single rapid quenching process are effectively solved, electrochemistry capacity is increased, and cycle life is prolonged. External magnetic field processing or non-external-magnetic-field processing can be achieved, an original rapid quenching device is improved, the device is not limited to a melt-spinning device, the magnetic field intensity is adjustable, a magnetic support is convenient to detach and install, steps are simple, and cost is low.
Description
Technical field
The utility model relates to the vacuum melting technology field, is specifically related to the fast quenching device of vacuum induction melting under the effect of a kind of magnetic field.
Background technology
At present, melt-quenching method is industrial preparation hydrogen bearing alloy new method.Melt-quenching method has overcome the deficiency of traditional ingot casting smelting process, be dephasign and the component segregation that the chilling temperature inequality is brought in the ingot casting condensation process, alloy can keep the composition under the molten condition to solidify, thereby being reached, alloying component highly homogenizes and crystal grain thinning, increase the mixed structure that also can obtain crystallite, nano-crystalline and amorphous with cooling velocity, improve the cyclical stability of alloy.Yet the alloy growth excessive velocities has brought lattice defect and stress to increase, and makes alloy activity function and discharge capacity reduce.Therefore, development new technologies improve quick quenching technique the alloy Effect on Performance are seemed particularly important.
In recent years, along with electromagnetic theory is progressively perfect, handle with its uniqueness that has in magnetic field, can not contact with material with the form of " field " can be converted into material and prepare required heat energy and kinetic energy, makes magnetic field technique obtain bigger progress in alloy material research and development field.Magnetic field comprises inhibition convection effect, thermoelectric magnetic fluid effect and keeps alloy magnetic anisotropy energy least action that to the effect of melt it is complete to be conducive to crystal growth, the orientation oriented growth of texture structure and the minimizing of crystal lattice stress.As seen, magnetic field is handled and may effectively be reduced hydrogen bearing alloy because the lattice defect that the fast quenching processing causes increases and component segregation.Get rid of in the band machine in current vacuum and rationally to introduce the magnetic field treatment technology, for the hydrogen bearing alloy of processability excellence provides new method.
Summary of the invention
The objective of the invention is to be brought the alloy discharge capacity low by improving by the rapid quenching technique preparation, the problem of dynamic performance difference, for preparation has high power capacity, the hydrogen bearing alloy of long-life and excellent dynamic performance provides a kind of effective magnetic field to handle following vacuum induction melting fast quenching and gets rid of belting.
In order to realize above-mentioned technical purpose, technical scheme of the present invention is, the effect of a kind of magnetic field is the fast quenching device of vacuum induction melting down, comprise the fast quenching device of alloy melting, magnetic field treating apparatus and fill air extractor, the fast quenching device of described alloy melting comprises the main cavity of hollow, the quartz ampoule that is used for loading alloy block and has nozzle, be used for adding the coil of thermalloy, the water-cooled copper roller that is used for the column of cooled alloy, for generation of radio-frequency current with the radio frequency induction heating control apparatus of control coil heating be used for reclaiming the recycling cavity of the hollow of alloy, described water-cooled copper roller be arranged at main cavity the center and can be around self axis rotation, described quartz ampoule vertically be arranged at the water-cooled copper roller directly over and nozzle over against the water-cooled copper roller, described coil encircling quartz ampoule arranges, described radio frequency induction heating control apparatus is electrically connected control coil, described recycling cavity is Rotary-table, the recycling cavity diameter bigger an end be arranged in the main cavity rotation of water-cooled copper roller and get rid of band direction place and be used for receiving cooled alloy, the other end of recycling cavity is provided with the chamber door and passes main cavity for collecting sample, described magnetic field treating apparatus comprises that two are set in parallel in permanent magnet and the magnet holder of the nozzle both sides of quartz ampoule, described magnet holder is arranged in the main cavity and supports permanent magnet, two permanent magnets form magnetostatic field and magnetic direction at the nozzle place of quartz ampoule parallel with horizontal plane, describedly fills that air extractor connects main cavity and quartz ampoule and for vacuumizing and charge into inert gas in the main cavity and blow out alloy solution from quartz ampoule.
Described a kind of magnetic field effect is the fast quenching device of vacuum induction melting down, described permanent magnet is square permanent magnet, the formed magnetic field intensity of permanent magnet is 0.1～1.5T, the length of permanent magnet is not less than 70mm, highly be not less than 30mm, the formed magnetic field of permanent magnet covers the nozzle of quartz ampoule and exceeds nozzle location and is not less than 10mm, and the placing direction of permanent magnet is parallel with the top tangent plane direction of water-cooled copper roller.
Described a kind of magnetic field effect is the fast quenching device of vacuum induction melting down, described magnet holder is made by diamagnetic material and is semicircular arc, the external diameter of the semi arch of magnet holder is identical with the internal diameter of main cavity and be fixed in the main cavity, and magnet holder is fixedlyed connected with magnet by screw.
Described a kind of magnetic field effect is the fast quenching device of vacuum induction melting down, the nozzle diameter of described quartz ampoule is 1～1.5mm, the nozzle of quartz ampoule and copper roller surface are at a distance of 1～2mm, and copper roller linear velocity is 5～30m/s, and the expulsion pressure of alloy melt is 0.04～0.08MPa in the nozzle.
Described a kind of magnetic field effect is the fast quenching device of vacuum induction melting down, the described air extractor that fills comprises aspiration pump, evacuating valve, charging valve, inert gas container, the container charging valve, the quartz ampoule charging valve, container pressure table and main cavity Pressure gauge, described aspiration pump connects main cavity by pipeline, evacuating valve is installed on aspiration pump and the pipeline that main cavity is connected, outside inertia source of the gas connects main cavity by pipeline, charging valve is installed on outside inertia source of the gas and the pipeline that main cavity is connected, described inert gas container connects outside inertia source of the gas and quartz ampoule respectively by pipeline, described container charging valve is installed on the connecting pipe of inert gas container and outside inertia source of the gas, described quartz ampoule charging valve is installed on the connecting pipe of inert gas container and quartz ampoule, described container pressure table is installed on the inert gas container place, and described main cavity Pressure gauge is installed on the main cavity place.
Technique effect of the present invention is, the vacuum induction melting fast quenching gets rid of belting to provide a kind of effective magnetic field to handle down, and handle and two kinds of alloy novel preparation methods of cooling fast in collection magnetic field, can prepare the alloy of comprehensive electrochemical excellence.This device is compared with having the hydrogen bearing alloy preparation facilities now, has following advantage:
(1) handle and two kinds of alloy novel preparation methods of quick cooling in collection magnetic field, the form of magnetic field by the field acts on alloy electronic motion state provides energy to it, influence molten alloy lattice growth situation in the fast quenching process, for crystal growth provides relatively stable environment, the lattice defect that the single rapid quenching technique of effective improvement brings is many, problems such as stress is big, thus electrochemistry capacitance and cycle life increased.
(2) the present invention can realize externally-applied magnetic field or not externally-applied magnetic field processing, and original fast quenching device is improved, and be not limited to the above-mentioned belting that gets rid of, and magnetic field intensity is adjustable, supports permanent magnet shelf easy accessibility, and step is simple and cost is low.
(3) but this device except the hydrogen bearing alloy system in the Processing Example, can also be used for other ferromagnetism or paramagnetic alloy system.
The invention will be further described below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 gets rid of the belting schematic diagram for magnetic field described in the utility model acting device in conjunction with fast quenching;
Fig. 2 gets rid of the belting overall construction drawing for vacuum induction melting fast quenching under the effect of magnetic field described in the utility model.
Fig. 3 is the XRD figure of embodiment 1 and Comparative Examples 1.
Fig. 4 is the SEM figure of embodiment 1 and Comparative Examples 1.
Fig. 5 is the XRD figure of embodiment 2 and Comparative Examples 2.
Among Fig. 3, magnetic field does not change MmNi
3.6Co
0.7Mn
0.4Al
0.3The phase structure of alloy, two kinds of methods have all kept single CaCu5 type structure.
Among Fig. 4, magnetic field obviously makes MmNi
3.6Co
0.7Mn
0.4Al
0.3The alloy grain refinement is more elongated columnar crystal structure, and what do not add magnetic field then is the thick equiax crystal structure of random orientation.
Among Fig. 5, magnetic field makes Mg
2Ni
0.8Mn
0.2The alloy dephasign disappears, and makes composition more even, and diffraction maximum compares and do not add magnetic field broadening to some extent, illustrate that magnetic field makes the alloy grain refinement, the internal stress increase.
Wherein 1 is that radio frequency induction heating control apparatus, 2 is that main cavity, 3 is that coil, 4 is that quartz ampoule, 6 is that main cavity Pressure gauge, 7 is that quartz ampoule charging valve, 8 is that inert gas container, 9 is that container pressure table, 10 is that container charging valve, 11 is that charging valve, 12 is that permanent magnet, 13 is that magnet holder, 14 is that water-cooled copper roller, 15 is that recycling cavity, 16 is that evacuating valve, 17 is aspiration pump.
The specific embodiment
Referring to Fig. 1, Fig. 2, the utility model comprises the fast quenching device of alloy melting, magnetic field treating apparatus and fill air extractor, the fast quenching device of alloy melting comprises the main cavity of hollow, the quartz ampoule that is used for loading alloy block and has nozzle, be used for adding the coil of thermalloy, the water-cooled copper roller that is used for the column of cooled alloy, for generation of radio-frequency current with the radio frequency induction heating control apparatus of control coil heating be used for reclaiming the recycling cavity of the hollow of alloy, the water-cooled copper roller be arranged at main cavity the center and can be around self axis rotation, quartz ampoule vertically be arranged at the water-cooled copper roller directly over and nozzle over against the water-cooled copper roller, the coil encircling quartz ampoule arranges, the radio frequency induction heating control apparatus is electrically connected control coil, the radio frequency induction heating control apparatus is by producing radio-frequency current (a kind of high frequency electric, frequency is greater than 10000Hz), be applied in the induction coil, coil produces action of alternating magnetic field makes it to produce same frequency in alloy block induced-current under this induced-current effect, thereby with the alloy heating and melting, its heating power can be regulated by changing the radio-frequency current frequency.Recycling cavity is Rotary-table, the recycling cavity diameter bigger an end be arranged in the main cavity rotation of water-cooled copper roller and get rid of band direction place and be used for receiving cooled alloy, the other end of recycling cavity is provided with the chamber door and passes main cavity for collecting sample, recycling cavity one side round bottom face is positioned at the quartz ampoule spout along getting rid of band direction 20cm place, the about 15cm of diameter.The about 10cm of opposite side bottom surface diameter.Alloy melt is extremely cold just in time drops into recycling cavity after getting rid of band, can collect sample opening the chamber door than minor diameter one side.The magnetic field treating apparatus comprises that two are set in parallel in permanent magnet and the magnet holder of the nozzle both sides of quartz ampoule, magnet holder is arranged in the main cavity and supports permanent magnet, two permanent magnets are parallel with horizontal plane at the nozzle place of quartz ampoule formation magnetostatic field and magnetic direction, fill air extractor connection main cavity and quartz ampoule and also are used for and will vacuumize and charge into inert gas in the main cavity and blow out alloy solution from quartz ampoule.
Permanent magnet is square permanent magnet, the formed magnetic field intensity of permanent magnet is 0.1～1.5T, the length of permanent magnet is not less than 70mm, highly be not less than 30mm, the formed magnetic field of permanent magnet covers the nozzle of quartz ampoule and exceeds nozzle location and is not less than 10mm, and the placing direction of permanent magnet is parallel with the top tangent plane direction of water-cooled copper roller.
Magnet holder is made by diamagnetic material and is semicircular arc, and the external diameter of the semi arch of magnet holder is identical with the internal diameter of main cavity and be fixed in the main cavity, and magnet holder is fixedlyed connected with magnet by screw.
The nozzle diameter of quartz ampoule is 1～1.5mm, and the nozzle of quartz ampoule and copper roller surface are at a distance of 1～2mm, and copper roller linear velocity is 5～30m/s, and the expulsion pressure of nozzle is 0.04～0.08MPa.
Fill air extractor and comprise aspiration pump, evacuating valve, charging valve, inert gas container, the container charging valve, the quartz ampoule charging valve, container pressure table and main cavity Pressure gauge, aspiration pump connects main cavity by pipeline, evacuating valve is installed on aspiration pump and the pipeline that main cavity is connected, outside inertia source of the gas connects main cavity by pipeline, charging valve is installed on outside inertia source of the gas and the pipeline that main cavity is connected, inert gas container connects outside inertia source of the gas and quartz ampoule respectively by pipeline, the container charging valve is installed on the connecting pipe of inert gas container and outside inertia source of the gas, the quartz ampoule charging valve is installed on the connecting pipe of inert gas container and quartz ampoule, the container pressure table is installed on the inert gas container place, and the main cavity Pressure gauge is installed on the main cavity place.All Pressure gauges (vacuum meter) reading under one big air pressure is 0, vacuumizes under the state to be-0.1MPa.Start working when vacuumizing, the evacuating valve of performing fighting is earlier closed the operation of bleeding of charging valve, container charging valve, quartz ampoule charging valve; Close evacuating valve then, open charging valve, give the main cavity applying argon gas.Above-mentioned vacuumizing is charged to main cavity Pressure gauge (showing main cavity pressure) behind the applying argon gas 3 times and is-0.04MPa repeatedly.Close charging valve, evacuating valve then, open the container charging valve, argon gas charged in the inert gas container to the container pressure table be shown as 0.04MPa, closing containers charging valve then, open the quartz ampoule charging valve again quartz ampoule is inflated with the ejection of the alloy solution in the quartz ampoule, can adjust the spouting velocity of alloy solution in the quartz ampoule by regulating the quartz ampoule charging valve at any time during operation.
The process that adopts this device preparation alloy is described below in conjunction with embodiment.
Embodiment 1:
An amount of hydrogen bearing alloy piece MmNi
3.6Co
0.7Mn
0.4Al
0.3Be positioned over long 10cm, in the quartz ampoule 4 of internal diameter 1cm, the pipe end is the aperture of diameter 1.5mm, and the quartz ampoule 4 that installs sample is placed in the induction coil 3, and quartz ampoule 4 is moderate to the distance of copper roller 14.Selected 0.2T permanent magnet, semicircular arc brandreth 13 is embedded in the main cavity 2, and permanent magnet 12 is fixing by magnet holder 13, adjusts the permanent magnet height and makes magnetic field center also fixing between quartz ampoule 4 ends and water-cooled copper roller 14 surfaces.Carry out the fast quenching operation then, start the sucking pump pump.Close charging valve, container charging valve, quartz ampoule charging valve, open evacuating valve 16, being evacuated to main cavity Pressure gauge 6 readings is pact-0.1MPa, and keeps two minutes under this state.Close evacuating valve 16, opening charging valve 11, to feed the number of degrees that high-purity argon gas are charged to vacuum meter 6 be 0MPa.Close charging valve 11 again, open evacuating valve 16 and vacuumize, inflation is carried out aforesaid operations three times so repeatedly again, is inflated to main cavity Pressure gauge 6 readings for the last time to be-0.04Mpa.Close charging valve 11, open container charging valve 10 and charge into high-purity argon gas to container pressure table 9 closing containers charging valve 10 when the 0.04MPa.Regulating water-cooled copper rod 14 rotational line speed is that 20m/s also stablizes startup arc-induced heater when rotating, and treats to open when sample becomes molten condition quartz ampoule charging valve 7 and is sprayed onto the molten state sample in the high speed copper roller rotating 14 and collection.The alloy material MmNi that obtains
3.6Co
0.7Mn
0.4Al
0.3Carry out XRD, SEM and characterize, Electrochemical Detection adopts three-electrode system, adopts 60mAg
-1Constant-current charge 6h, 60mAg
-1Constant-current discharge to stopping potential is that 1.0V carries out cycle charge discharge, obtains the maximum discharge capacity C of alloy electrode
Max, mAhg
-1Conservation rate S with electrochemistry capacitance after 100 charge and discharge cycles
100Weigh the cycle life of alloy.The discharge capacity of alloy and cycle performance data are listed among the table l.
Embodiment 2:
An amount of hydrogen bearing alloy piece Mg
2Ni
0.8Mn
0.2Be positioned over long 10cm, in the quartz ampoule 4 of internal diameter 1cm, the pipe end is the aperture of the about 1.5mm of diameter, and the quartz ampoule 4 that installs sample is placed in the induction coil 3, and quartz ampoule 4 is moderate to the distance of copper roller 14.Selected 1T permanent magnet, semicircular arc brandreth 13 is embedded in the main cavity 2, and permanent magnet 12 is fixing by magnet holder 13, adjusts the permanent magnet height and makes magnetic field center also fixing between quartz ampoule 4 ends and water-cooled copper roller 14 surfaces.Carry out the fast quenching operation then, start the sucking pump pump.Close charging valve, container charging valve, quartz ampoule charging valve, open evacuating valve 16, being evacuated to main cavity Pressure gauge 6 readings is pact-0.1MPa, and keeps two minutes under this state.Close evacuating valve 16, opening charging valve 11, to feed the number of degrees that high-purity argon gas are charged to vacuum meter 6 be 0MPa.Close charging valve 11 again, open evacuating valve 16 and vacuumize, inflation is carried out aforesaid operations three times so repeatedly again, is inflated to main cavity Pressure gauge 6 readings for the last time to be-0.04Mpa.Close charging valve 11, open container charging valve 10 and charge into high-purity argon gas to container pressure table 9 closing containers charging valve 10 when the 0.04MPa.Regulating water-cooled copper roller 14 rotational line speed is that 20m/s also stablizes startup arc-induced heater when rotating, and treats that it is to be sprayed onto in the high speed copper roller rotating 14 and collection by opening air valve 7 that sample becomes molten condition to the molten state sample.The alloy material Mg that obtains
2Ni
0.8Mn
0.2Carry out XRD, SEM and characterize, Electrochemical Detection adopts under the three-electrode system, adopts 20mAg
-1Constant-current charge 6h, 10mAg
-1Constant-current discharge to stopping potential is that 1.0V carries out cycle charge discharge, obtains the maximum discharge capacity C of alloy electrode
Max, mAhg
-1Conservation rate S with electrochemistry capacitance after 20 charge and discharge cycles
20Weigh the cycle life of alloy.The discharge capacity of alloy and cycle performance data are listed in the table 2.
Comparative Examples 1
The effect of removal magnetic field, material preparation method, material list are sought peace electrochemical property test with embodiment 1 Comparative Examples 2
The effect of removal magnetic field, material preparation method, material list are sought peace electrochemical property test with embodiment 2.
The material electrochemical performance test data of embodiment 1 and Comparative Examples 1 preparation
The material electrochemical performance test data of embodiment 2 and Comparative Examples 2 preparations
Claims (5)
1. a magnetic field acts on the fast quenching device of vacuum induction melting down, it is characterized in that, comprise the fast quenching device of alloy melting, magnetic field treating apparatus and fill air extractor, the fast quenching device of described alloy melting comprises the main cavity of hollow, the quartz ampoule that is used for loading alloy block and has nozzle, be used for adding the coil of thermalloy, the water-cooled copper roller that is used for the column of cooled alloy, for generation of radio-frequency current with the radio frequency induction heating control apparatus of control coil heating be used for reclaiming the recycling cavity of the hollow of alloy, described water-cooled copper roller be arranged at main cavity the center and can be around self axis rotation, described quartz ampoule vertically be arranged at the water-cooled copper roller directly over and nozzle over against the water-cooled copper roller, described coil encircling quartz ampoule arranges, described radio frequency induction heating control apparatus is electrically connected control coil, described recycling cavity is Rotary-table, the recycling cavity diameter bigger an end be arranged in the main cavity rotation of water-cooled copper roller and get rid of band direction place and be used for receiving cooled alloy, the other end of recycling cavity is provided with the chamber door and passes main cavity for collecting sample, described magnetic field treating apparatus comprises that two are set in parallel in permanent magnet and the magnet holder of the nozzle both sides of quartz ampoule, described magnet holder is arranged in the main cavity and supports permanent magnet, two permanent magnets form magnetostatic field and magnetic direction at the nozzle place of quartz ampoule parallel with horizontal plane, describedly fills that air extractor connects main cavity and quartz ampoule and for vacuumizing and charge into inert gas in the main cavity and blow out alloy solution from quartz ampoule.
2. a kind of magnetic field according to claim 1 acts on the fast quenching device of vacuum induction melting down, it is characterized in that, described permanent magnet is square permanent magnet, the formed magnetic field intensity of permanent magnet is 0.1～1.5T, the length of permanent magnet is not less than 70mm, highly be not less than 30mm, the formed magnetic field of permanent magnet covers the nozzle of quartz ampoule and exceeds nozzle location and is not less than 10mm, and the placing direction of permanent magnet is parallel with the top tangent plane direction of water-cooled copper roller.
3. a kind of magnetic field according to claim 1 acts on the fast quenching device of vacuum induction melting down, it is characterized in that, described magnet holder is made by diamagnetic material and is semicircular arc, the external diameter of the semi arch of magnet holder is identical with the internal diameter of main cavity and be fixed in the main cavity, and magnet holder is fixedlyed connected with magnet by screw.
4. a kind of magnetic field according to claim 1 acts on the fast quenching device of vacuum induction melting down, it is characterized in that, the nozzle diameter of described quartz ampoule is 1～1.5mm, the nozzle of quartz ampoule and copper roller surface are at a distance of 1～2mm, copper roller linear velocity is 5～30m/s, and the expulsion pressure of alloy melt is 0.04～0.08MPa in the nozzle.
5. a kind of magnetic field according to claim 1 acts on the fast quenching device of vacuum induction melting down, it is characterized in that, the described air extractor that fills comprises aspiration pump, evacuating valve, charging valve, inert gas container, the container charging valve, the quartz ampoule charging valve, container pressure table and main cavity Pressure gauge, described aspiration pump connects main cavity by pipeline, evacuating valve is installed on aspiration pump and the pipeline that main cavity is connected, outside inertia source of the gas connects main cavity by pipeline, charging valve is installed on outside inertia source of the gas and the pipeline that main cavity is connected, described inert gas container connects outside inertia source of the gas and quartz ampoule respectively by pipeline, described container charging valve is installed on the connecting pipe of inert gas container and outside inertia source of the gas, described quartz ampoule charging valve is installed on the connecting pipe of inert gas container and quartz ampoule, described container pressure table is installed on the inert gas container place, and described main cavity Pressure gauge is installed on the main cavity place.
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| CN 201220748191 CN203197218U (en) | 2012-12-31 | 2012-12-31 | Vacuum induction melting rapid quenching device under effect of magnetic field |
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| CN 201220748191 CN203197218U (en) | 2012-12-31 | 2012-12-31 | Vacuum induction melting rapid quenching device under effect of magnetic field |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088277A (en) * | 2012-12-31 | 2013-05-08 | 中南大学 | Method and device for improving performance of Mg2Ni type hydrogen storing alloy |
| CN106531388A (en) * | 2016-10-28 | 2017-03-22 | 广东工业大学 | Composite magnetic powder and preparation method therefor |
| CN107377911A (en) * | 2017-08-05 | 2017-11-24 | 芜湖君华材料有限公司 | A kind of closed amorphous band fast quenching protection gas cyclic utilization system |
| CN112846117A (en) * | 2021-01-05 | 2021-05-28 | 皖西学院 | Safety device for amorphous material smelting and spraying bag |
-
2012
- 2012-12-31 CN CN 201220748191 patent/CN203197218U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088277A (en) * | 2012-12-31 | 2013-05-08 | 中南大学 | Method and device for improving performance of Mg2Ni type hydrogen storing alloy |
| CN103088277B (en) * | 2012-12-31 | 2016-01-20 | 中南大学 | A kind of raising Mg 2the method of Ni type hydrogen-storage alloy performance and device |
| CN106531388A (en) * | 2016-10-28 | 2017-03-22 | 广东工业大学 | Composite magnetic powder and preparation method therefor |
| CN107377911A (en) * | 2017-08-05 | 2017-11-24 | 芜湖君华材料有限公司 | A kind of closed amorphous band fast quenching protection gas cyclic utilization system |
| CN112846117A (en) * | 2021-01-05 | 2021-05-28 | 皖西学院 | Safety device for amorphous material smelting and spraying bag |
| CN112846117B (en) * | 2021-01-05 | 2021-12-31 | 皖西学院 | Safety device for amorphous material smelting and spraying bag |
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Granted publication date: 20130918 |