CN110904362A - Preparation method of high preferred orientation NiFeGa magnetic memory alloy wire - Google Patents
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 62
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 43
- 239000000956 alloy Substances 0.000 claims abstract description 43
- 239000002994 raw material Substances 0.000 claims abstract description 41
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000006698 induction Effects 0.000 claims abstract description 21
- 238000003723 Smelting Methods 0.000 claims abstract description 13
- 229910052786 argon Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 8
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
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- 230000001681 protective effect Effects 0.000 claims description 4
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- 229910000807 Ga alloy Inorganic materials 0.000 description 1
- 229910003310 Ni-Al Inorganic materials 0.000 description 1
- 229910018102 Ni-Mn-Al Inorganic materials 0.000 description 1
- 229910018548 Ni—Mn—Al Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
- B22D11/0614—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires the casting wheel being immersed in a molten metal bath, and drawing out upwardly the casting strip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
Abstract
The invention belongs to the field of memory alloy preparation, and discloses a preparation method of a high preferred orientation NiFeGa magnetic memory alloy wire. The NiFeGa magnetic memory alloy wire raw material rod is prepared by the following method: preparing a sample by using a nickel sheet with the purity of 99.99%, a pure iron sheet with the purity of 99.95% and gallium with the purity of 99.9999% as raw materials in an induction smelting furnace under the protection atmosphere of argon, then carrying out hot-spinning on the sample at high temperature, and finally carrying out hot-drawing on the hot-spun sample to obtain a rod-shaped sample, namely the NiFeGa magnetic memory alloy wire raw material rod; and ultrasonically treating the NiFeGa magnetic memory alloy wire raw material rod, and contacting the linear non-feeding motor feed rod through a quartz glass tube to obtain the NiFeGa magnetic memory alloy wire. The NiFeGa alloy wire prepared by the method has high preferred orientation.
Description
Technical Field
The invention belongs to the field of memory alloy preparation, and relates to a preparation method of a high preferred orientation NiFeGa magnetic memory alloy wire.
Background
The shape memory alloy has wide application prospect in various fields of aerospace, machinery, medicine and the like because of unique shape memory effect and superelasticity. However, ferromagnetic shape memory alloys have both the advantages of high response frequency and large output strain, and have been receiving great attention in recent years. Magnetically driven shape memory effects are currently found in many alloys, mainly including: Ni-Mn-Ga, Ni-Fe-Ga, Fe-Pd, Fe-Pt, Ni-Mn-Al, Co-Ni-Ga, Co-Ni-Al, and Ni-Mn-X (X ═ In, Sn, Sb) alloys, and the like. Among them, Ni-Mn-Ga is the first to be found and is also the most potential magnetic drive shape memory alloy. But the intrinsic brittleness of Ni-Mn-Ga alloys limits their practical applications.
The NiFeGa alloy is a Heusler type ferromagnetic shape memory alloy developed since 2003. Compared with NiMnGa alloy, the material has the same crystal structure, similar magnetic field induced strain and magnetocrystalline anisotropy constant (k-1.5X 10) of the same order of magnitude5J/m3) (ii) a NiFeGa alloy has high Curie temperature and good processing performance, so that the NiFeGa alloy becomes a promising magnetic driver material. Meanwhile, the alloy does not contain a high-volatility Mn element, is easy to prepare, has large magnetocrystalline anisotropy and twin crystal interface shift energy less than 3Mpa, is expected to obtain large magnetic induced strain, and has important research and engineering values.
Micro-Electro-Mechanical systems (MEMS), also called Micro-Electro-Mechanical systems, microsystems, micromachines, etc., refer to high-tech devices with dimensions of a few millimeters or even smaller. With the development of scientific technology, the interdisciplinary disciplines become more and more. MEMS sensors and actuators are also reported to be spread over many devices in automotive, aerospace, communications and biological fields. At this time, if the multifunctional intelligent material is crossed with the miniaturization technology, a new generation of intelligent MEMS is generated. Among the numerous smart materials, shape memory alloys have a high output density (about 10 a)7J/m3) Good shape memory effect and superelasticity and thermal stabilityAttention is paid. Especially, the shape memory alloy integrated MEMS device still shows good superelasticity, one-way, two-way and multi-way shape memory effect, thereby having potential application value in the fields of new-generation sensors, drivers, energy conversion and other functional micro devices. But the dimensional factors have a large impact on the reliability of the design and performance of the microdevice. Especially, with the development of science and technology, people's attention is gradually turning to micro electro mechanical systems, so that the application of the magnetic control shape memory alloy in the aspect of small size has important significance.
With the development of miniaturization of intelligent micro devices, the requirements for small-sized intelligent materials are higher and higher. The small size of the intelligent material brings the characteristic transformation, and the forming rule and the generation mechanism of the size effect have important significance for practical application.
Disclosure of Invention
Therefore, in order to improve the reliability of the design and performance of the new-generation intelligent MEMS, the NiFeGa magnetic shape memory alloy wire is prepared by adopting a hot-swaging, hot-drawing and Taylor method for the first time.
The invention provides a preparation method of a NiFeGa magnetic memory alloy wire with high preferred orientation.
The above purpose of the invention is realized by the following technical scheme:
a preparation method of a high preferred orientation NiFeGa magnetic memory alloy wire;
the NiFeGa magnetic memory alloy wire is prepared from the following raw materials in parts by weight: preparing a sample by using a nickel sheet with the purity of 99.99%, a pure iron sheet with the purity of 99.95% and gallium with the purity of 99.9999% as raw materials in an induction smelting furnace under the protective atmosphere of argon; before smelting, the mixture is pumped by a mechanical pump and a molecular pump to be vacuum of 6.67 multiplied by 10-3Pa, recharging high-purity argon to 4X 10-2Pa, starting smelting; in order to ensure the uniformity of the chemical components of the ingot, each sample is overturned and smelted for four times and magnetically stirred, then the smelted button ingot is remelted, a suction casting device at the bottom of a water-cooled copper crucible is used for suction casting to form a rod-shaped sample with the diameter of 10mm multiplied by 75mm, the rod-shaped sample is taken out after being cooled, and the raw material of the NiFeGa magnetic memory alloy wire is obtainedThe material is in a shape of a round rod column. Performing hot rotary swaging on the NiFeGa rod-shaped cylindrical raw material at the temperature of 900-1100 ℃, wherein the rotary swaging feeding amount of each pass is 0.4-0.8mm, and performing tempering once after each pass to finally obtain the rotary swaging rod with the diameter size of phi 6 mm. And finally, carrying out hot drawing on the hot rotary swaging rod in the range of 900-1100 ℃, wherein the size of the hot drawing of each pass is 2-6%, and carrying out tempering once after each pass to finally prepare the NiFeGa magnetic memory alloy wire raw material rod with the diameter of phi 4 mm.
The NiFeGa magnetic memory alloy wire is prepared by the following method: respectively putting the obtained raw material rod with the diameter phi of 4mm of the NiFeGa magnetic memory alloy wire and a quartz glass tube b with one closed end into an acetone solution for ultrasonic treatment for 10 minutes and the ultrasonic frequency of 25KHz-120KHz, then putting the raw material rod and the quartz glass tube b into an absolute ethyl alcohol solution for ultrasonic treatment for 10 minutes and the ultrasonic frequency of 25KHz-120KHz, then carrying out ultrasonic treatment for 10 minutes by using distilled water, finally taking out the raw material rod and the quartz glass tube b, and then respectively putting the raw material rod and the quartz glass tube b into a furnace with the temperature of 100 ℃ for drying for 2 hours for later use; in order to ensure uniform heating and prevent the quartz glass tube from cracking, the preparation method selects a quartz glass tube b with the same thermal expansion coefficient as the NiFeGa magnetic memory alloy and the inner diameter of 4mm, heats the quartz glass tube b by using a high-frequency induction coil, adjusts the height of the quartz glass tube b to be the same as that of the induction coil, fixes the quartz glass tube b, inserts another quartz glass tube a (the two ends are open, the diameter of the quartz glass tube is the same as that of the NiFeGa magnetic memory alloy wire raw material) below the alloy cylinder of the magnetic memory alloy wire raw material rod, and ensures that the lower part of the quartz glass tube a is contacted with a linear stepping motor feed rod; and high-purity argon is flushed into the quartz glass tube a and the quartz glass tube b in the whole preparation process of the alloy wire. Meanwhile, the high-frequency induction coil is provided with a metal wheel. Before preparing the alloy wire, firstly, opening a control motor of a copper wheel to enable the rotating speed of the control motor to be adjustable between 600 and 2000 revolutions per minute; then switching on an induction heating power supply, adjusting the induction heating power to 15-25Kw, enabling the temperature of a molten pool of the alloy raw material to be 1500-.
The metal wheel is a pure copper wheel.
Compared with the prior art, the invention has the beneficial effects that:
the NiFeGa magnetic memory alloy wire prepared by the method is different from the existing magnetic shape memory alloy NiFeGa prepared by smelting in a smelting furnace, and has the following advantages compared with the prior art:
1. the crystal grains of the NiFeGa magnetic memory alloy wire prepared by the invention are arranged along the same columnar crystal direction, and a large number of slender white second phases appear at the crystal boundary, namely high-toughness gamma phase
2. XRD diffraction analysis and test are carried out on the NiFeGa magnetic memory alloy wire prepared by the method, and the result shows that strong diffraction peaks appear at two angles of 44.7 ℃ and 65.2 ℃ of the alloy wire prepared by the method, which indicates that the NiFeGa magnetic memory alloy wire prepared by the method preferentially grows mainly along the two directions, so that the NiFeGa magnetic memory alloy wire prepared by the method has high preferred orientation;
3. the fracture mechanism of the NiFeGa magnetic memory alloy wire prepared by the invention is changed from a brittle fracture mechanism to a quasi-cleavage fracture mechanism, and a large number of dissociation steps and river-like patterns are observed in the fracture morphology of the alloy wire, which indicates that the alloy wire shows the quasi-cleavage fracture mechanism.
Drawings
FIG. 1 is a schematic diagram of an apparatus for manufacturing a NiFeGa alloy wire according to an embodiment of the present invention.
Fig. 2 is an SEM image of the NiFeGa alloy wire prepared in example 1 of the present invention.
Fig. 3 is an XRD spectrum of the NiFeGa alloy wire of example 2 of the present invention.
Fig. 4 is a fracture morphology observation spectrum of NiFeGa alloy wires prepared in example 1 and example 3 of the present invention, wherein (a) is a fracture morphology graph of the alloy wire prepared in example 1, and (b) is a fracture morphology graph of the alloy wire prepared in example 3.
Detailed Description
The invention is described in more detail below with reference to specific examples, without limiting the scope of the invention. Unless otherwise specified, the experimental methods adopted by the invention are all conventional methods, and experimental equipment, materials, reagents and the like used in the experimental method can be obtained from commercial sources. The apparatus used in the examples was designed and prepared by the inventors' subject group. See figure 1.
Example 1
The NiFeGa magnetic memory alloy wire of the present embodiment is prepared by the following method: preparing a sample by using a nickel sheet with the purity of 99.99%, a pure iron sheet with the purity of 99.95% and gallium with the purity of 99.9999% as raw materials in an induction smelting furnace under the protective atmosphere of argon; before smelting, the mixture is pumped by a mechanical pump and a molecular pump to be vacuum of 6.67 multiplied by 10-3Pa, recharging high-purity argon to 4X 10-2Pa, starting smelting; in order to ensure the uniformity of chemical components of the ingot, each sample is overturned and smelted for four times and magnetically stirred, then the smelted button ingot is remelted, a suction casting device at the bottom of a water-cooled copper crucible is used for suction casting to obtain a rod-shaped sample with the diameter of 10mm multiplied by 75mm, and the rod-shaped sample is taken out after being cooled to obtain the raw material of the NiFeGa magnetic memory alloy wire, wherein the raw material is in a round rod shape. Hot rotary swaging is carried out on the NiFeGa rod-shaped cylindrical raw material at 900 ℃, the rotary swaging feeding amount of each pass is 0.4mm, and tempering is carried out after each pass, so that the rotary swaging rod material with the diameter size of phi 6mm is finally obtained. And finally, carrying out hot drawing on the hot rotary swaging rod in the range of 900-1100 ℃, wherein the size of the hot drawing of each pass is 2-6%, and carrying out tempering once after each pass to finally prepare the NiFeGa magnetic memory alloy wire raw material rod with the diameter of phi 4 mm.
The NiFeGa magnetic memory alloy wire of the present embodiment is prepared as follows: respectively putting the NiFeGa magnetic memory alloy wire raw material rod with the diameter of phi 4mm and a quartz glass tube b with one closed end into an acetone solution for ultrasonic treatment for 10 minutes and the ultrasonic frequency of 25KHz, then putting the NiFeGa magnetic memory alloy wire raw material rod into an absolute ethyl alcohol solution for ultrasonic treatment for 10 minutes and the ultrasonic frequency of 25KHz, then carrying out ultrasonic treatment for 10 minutes by using distilled water, finally taking out the NiFeGa magnetic memory alloy wire raw material rod and the quartz glass tube b, and respectively putting the NiFeGa magnetic memory alloy wire raw material rod and the quartz glass tube b into a furnace with the temperature of 100 ℃ for drying for 2 hours for later use; in order to ensure uniform heating and prevent the quartz glass tube b from cracking, the preparation method selects the quartz glass tube b with the same thermal expansion coefficient as the NiFeGa magnetic memory alloy and the inner diameter of 4mm, heats the quartz glass tube b by using a high-frequency induction coil, adjusts the same height of the quartz glass tube b and the induction coil, fixes the quartz glass tube b, inserts another quartz glass tube a (the two ends are open, the diameter is the same as the diameter of the alloy wire raw material of the NiFeGa magnetic memory alloy wire) below the alloy cylinder of the magnetic memory alloy wire raw material rod, and ensures that the lower part of the quartz glass tube a is contacted with a linear stepping motor feed rod; and high-purity argon is flushed into the quartz glass tube a and the quartz glass tube b in the whole preparation process of the alloy wire. Meanwhile, the high-frequency induction coil is provided with a metal wheel; before preparing the alloy wire, a control motor of a copper wheel is turned on to enable the rotating speed of the control motor to be adjustable between 1500 revolutions per minute; then switching on an induction heating power supply, adjusting the induction heating power to be 15Kw, enabling the temperature of a molten pool of the alloy raw material to be 1500 ℃, then switching on a linear stepping motor, enabling the molten pool of the melted alloy wire raw material alloy to be close to a rotating metal wheel (the distance is within 1 mm) by adjusting the feeding speed of the motor, and then drawing the molten alloy in the molten pool into wires after the molten pool is contacted with the metal wheel and carrying away from the molten pool to obtain the NiFeGa magnetic memory alloy wire.
Example 2
The present embodiment is different from embodiment 1 in that: the induction heating power was varied at 20 Kw. The other experimental procedures were the same as in example 1.
Example 3
The present embodiment is different from embodiment 1 in that: the motor is controlled to rotate at 2000 rpm. The other experimental procedures were the same as in example 1.
The NiFeGa alloy wire prepared in example 1 was analyzed by SEM test, and as a result, as shown in fig. 2, it was seen that the grains of the NiFeGa alloy wire obtained in example 1 exhibited long grain growth, each grain being about 5 μm long; in addition, a plurality of white second phases are distributed at the grain boundary, namely the gamma phase, and the gamma phase is uniformly distributed at the grain boundary.
The NiFeGa alloy wire prepared in example 2 was analyzed by XRD test, and the test results are shown in fig. 3. It is evident from the figure that the alloy now exhibits a clearly preferred orientation, with strong diffraction peaks at both angles of 44.7 c and 65.2 c, and almost no diffraction peaks at other positions.
The NiFeGa alloy wires obtained in example 1 and example 3 were subjected to a fracture mechanism test, and as a result, as shown in fig. 4, it was found that the NiFeGa alloy wires exhibited a quasi-dissociation fracture mechanism. Wherein, a) is the fracture morphology of the NiFeGa alloy wire obtained in the embodiment 1, and b) is the fracture morphology of the NiFeGa alloy wire obtained in the embodiment 3.
The embodiments described above are merely preferred embodiments of the invention, rather than all possible embodiments of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (2)
1. A preparation method of a high preferred orientation NiFeGa magnetic memory alloy wire is characterized in that the NiFeGa magnetic memory alloy wire is prepared by the following steps: preparing a sample by using a nickel sheet, a pure iron sheet and gallium as raw materials and adopting an induction smelting furnace under the protective atmosphere of argon; carrying out hot rotary swaging on the obtained NiFeGa magnetic memory alloy sample to obtain a rotary swaging bar; carrying out hot drawing on the hot rotary-forged bar to finally obtain a NiFeGa magnetic memory alloy wire raw material bar;
and respectively putting the obtained NiFeGa magnetic memory alloy wire raw material rod and the quartz glass tube b with one closed end into an acetone solution for ultrasonic treatment, then putting the obtained NiFeGa magnetic memory alloy wire raw material rod and the quartz glass tube b into an absolute ethyl alcohol solution for ultrasonic treatment, then carrying out ultrasonic treatment with distilled water, taking out and drying for later use, and preparing the NiFeGa magnetic memory alloy wire by using a linear stepping motor.
2. The method for preparing the high preferred orientation NiFeGa magnetic memory alloy wire according to claim 1, which is characterized by comprising the following steps:
the NiFeGa magnetic memory alloy wire is prepared from the following raw materials in parts by weight: preparing a sample by using a nickel sheet with the purity of 99.99%, a pure iron sheet with the purity of 99.95% and gallium with the purity of 99.9999% as raw materials in an induction smelting furnace under the protective atmosphere of argon; before smelting, the mixture is pumped by a mechanical pump and a molecular pump to be vacuum of 6.67 multiplied by 10-3Pa, recharging high-purity argon to 4X 10-2Pa, starting smelting; each one of which isThe sample is overturned and smelted for four times and magnetically stirred, then the smelted button cast ingot is remelted, a suction casting device at the bottom of a water-cooled copper crucible is used for suction casting to form a rod-shaped sample with the diameter of phi 10mm multiplied by 75mm, and the rod-shaped sample is taken out after being cooled; performing hot rotary swaging on the NiFeGa rod-shaped cylindrical raw material at the temperature of 900-1100 ℃ on the obtained NiFeGa magnetic memory alloy rod-shaped sample, wherein the rotary swaging feeding amount of each pass is 0.4-0.8mm, and performing primary tempering after each pass; carrying out hot drawing on the hot rotary swaging rod at the temperature of 900-;
respectively putting the NiFeGa magnetic memory alloy wire raw material rod and the quartz glass tube b with one closed end into an acetone solution for ultrasonic treatment, then putting the mixture into an absolute ethyl alcohol solution for ultrasonic treatment, then carrying out ultrasonic treatment by using distilled water, and after taking out, respectively drying the NiFeGa magnetic memory alloy wire raw material rod and the quartz glass tube b for 2 hours for later use; heating the quartz glass tube b by using a high-frequency induction coil, adjusting the height of the quartz glass tube b to be the same as that of the induction coil, fixing the quartz glass tube b, inserting another quartz glass tube a below the alloy cylinder of the magnetic memory alloy wire raw material rod, and ensuring that the lower surface of the quartz glass tube a is contacted with a linear stepping motor feed rod; high-purity argon is flushed into the quartz glass tube a and the quartz glass tube b in the whole alloy wire preparation process; meanwhile, the high-frequency induction coil is provided with a metal wheel; before preparing the alloy wire, firstly, opening a control motor of a copper wheel to enable the rotating speed of the control motor to be adjustable at 600 plus 2000 rpm; and then switching on an induction heating power supply, adjusting the induction heating power to be 15-25Kw, enabling the temperature of a molten pool of the alloy raw material to be 1500-1550 ℃, turning on a linear stepping motor, enabling the molten pool of the molten NiFeGa magnetic memory alloy wire raw material alloy to be close to a rotating metal wheel by adjusting the feeding speed of the motor, and drawing molten alloy in the molten pool into a wire after the molten pool is contacted with the metal wheel and taking the wire away from the molten pool to obtain the NiFeGa magnetic memory alloy wire.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138035A (en) * | 1983-12-27 | 1985-07-22 | Res Inst Electric Magnetic Alloys | Magnetic alloy for magnetic recording and reproducing head and production thereof |
| CN105908017A (en) * | 2016-04-20 | 2016-08-31 | 北京科技大学 | High-super-elasticity Ni-Fe-Ga-Co micro wire and preparation method of same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138035A (en) * | 1983-12-27 | 1985-07-22 | Res Inst Electric Magnetic Alloys | Magnetic alloy for magnetic recording and reproducing head and production thereof |
| CN105908017A (en) * | 2016-04-20 | 2016-08-31 | 北京科技大学 | High-super-elasticity Ni-Fe-Ga-Co micro wire and preparation method of same |
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