Vacuum induction melting device and vacuum melting method of alloy material

Abstract

The invention belongs to the field of metal material processing and manufacturing, and provides a vacuum induction melting device and a vacuum melting method of an alloy material.The vacuum induction melting device comprises a crucible, a rotatable rapid hardening disc and a rotatable cooling disc, and the rapid hardening disc is sequentially provided with a blanking area, a liquid homogenizing rod and a material guiding plate; the crucible carries out blanking to the blanking area of the rapid hardening disc so as to carry out primary cooling forming, the thickness of primary cooling forming is controlled and adjusted through the liquid uniformizing rod, and then materials subjected to primary cooling forming enter the cooling disc through the material guiding plate to be subjected to secondary cooling. The thickness parameter distribution area of the material prepared through the vacuum induction melting device is wide, lattice size distribution can be effectively controlled, then the hydrogen absorption and desorption performance of the hydrogen storage alloy material is controlled, and therefore the hydrogen storage alloy material with the excellent performance can be prepared easily.

Description

Technical Field

[0001] The invention belongs to the technical field of metal material processing and manufacturing, and relates to a vacuum induction melting device and a vacuum melting method for alloy materials. Background Art

[0002] With the continuous increase in global energy demand and the improvement of environmental protection awareness, the development and utilization of clean energy has become an important research topic. Hydrogen energy, as an efficient and clean energy, has received widespread attention. Hydrogen storage technology, as a key link in the utilization of hydrogen energy, is of great significance to promoting the development of the hydrogen energy industry.

[0003] Hydrogen storage technology refers to the technology of storing hydrogen in a physical or chemical way so that it can be released when needed. Compared with the common high-pressure hydrogen storage and low-temperature liquid hydrogen storage technologies, alloy hydrogen storage has the advantages of large volume hydrogen storage density, low pressure, and high safety. It is one of the most promising hydrogen storage methods. In the current context, hydrogen energy storage, hydrogen metallurgy and other hydrogen energy applications have put forward higher requirements for alloy hydrogen storage.

[0004] The manufacturing method of hydrogen storage alloys has an important impact on the performance and cost of the alloys. Common manufacturing methods include vacuum induction melting, vacuum arc melting, vacuum suspension melting, gas atomization powder making, etc., so as to prepare metal raw materials, such as La, Ni, Ti, Mn, Fe and Mg, into target types of hydrogen storage alloys, such as AB5 type, AB2 type, AB type and superlattice type. Considering the selection of raw material melting point, energy consumption and cost, reaction uniformity and product performance, vacuum induction melting is the best choice for industrial-grade preparation of alloy hydrogen storage materials. It has the advantages of high single batch output, good product performance and consistency, and has been widely used in alloy melting fields such as hydrogen storage alloys and permanent magnetic materials.

[0005] Vacuum induction melting is a method of using electromagnetic induction to generate eddy currents in a metal conductor to heat the charge for melting, and then cooling and forming the molten material under the same vacuum environment (usually in a furnace). The cooling and forming process is an important step after vacuum induction melting, which has a significant impact on the performance of hydrogen storage alloys. Common cooling and forming processes include the following: 1) Rapid solidification and sheeting, where the molten alloy is introduced onto a rotating water-cooled copper roller, solidified into a thin sheet at a large degree of supercooling, and then cooled again; 2) Water-cooled mold ingot casting, where the high-temperature liquid alloy is introduced into a water-cooled mold cavity, and after the cooling water dissipates the heat, an alloy ingot in the shape of the mold cavity is formed; 3) Cooling plate ingot casting, where the high-temperature liquid alloy is directly introduced onto a horizontally rotating cooling plate for cooling and forming, and a plate-shaped alloy is formed.

[0006] However, all three molding processes have their shortcomings: 1) Rapid solidification sheeting: the thickness of most products is less than 1 mm, and some amorphous structures will be produced in the alloy during the cooling and molding process, which will reduce the hydrogen storage capacity of the product, resulting in lower mass and volume hydrogen storage density; 2) Water-cooled mold ingot casting: due to the high viscosity of the liquid alloy, the mold cavity must have a certain width to allow the liquid alloy to enter, and the thickness of most products is greater than 10 mm, which makes the grain size consistency of the alloy after molding poor, and the grains closer to the water cooling plate are finer; 3) Cooling plate ingot casting also has the same problems as water-cooled mold ingot casting, the product is thicker and the grain size consistency is poor.

[0007] It can be seen that the three commonly used molding processes are relatively limited in adjusting the thickness of the material molding, and it is difficult to achieve the preparation of materials with a thickness of 1 to 10 mm. Regarding the hydrogen absorption and desorption performance of hydrogen storage materials, the hydrogen absorption and desorption platform of the quick-setting sheet product is relatively flat, but the maximum hydrogen absorption capacity is low, resulting in a low effective hydrogen desorption capacity; the hydrogen absorption and desorption platform slope of the water-cooled mold ingot and cooling plate ingot products is relatively large, and element segregation occurs. Since some application scenarios have relatively high requirements for hydrogen desorption pressure, the effective hydrogen desorption capacity of the ingot product is small and it is difficult to be suitable for practical applications.

[0008] Therefore, new research and development of cooling molding schemes suitable for vacuum induction melting is still needed to further improve the performance and production efficiency of hydrogen storage alloys, promote the development of hydrogen storage technology, and provide strong support for the sustainable development of the hydrogen energy industry. Summary of the invention

[0009] In view of the problems existing in the prior art, the purpose of the present invention is to provide a vacuum induction melting device and a vacuum melting method for alloy materials, wherein the vacuum induction melting device comprises a crucible, a rotatable rapid solidification disk and a rotatable cooling disk, and the rapid solidification disk is provided with a material dropping area, a liquid leveling rod and a material guide plate in sequence; the crucible drops material into the material dropping area of ​​the rapid solidification disk for preliminary cooling and forming, and the thickness of the preliminary cooling and forming is controlled and adjusted by the liquid leveling rod, and then the preliminary cooling and forming material is fed into the cooling disk for secondary cooling by the material guide plate. The material thickness parameter distribution area of ​​the material prepared by the vacuum induction melting device is relatively wide, which can effectively control the lattice size distribution, and then control the hydrogen absorption and desorption performance of the hydrogen storage alloy material, thereby facilitating the preparation of hydrogen storage alloy materials with excellent performance.

[0010] To achieve this object, the present invention adopts the following technical solutions:

[0011] In a first aspect, the present invention provides a vacuum induction melting device, comprising:

[0012] A furnace body is connected to a vacuum system; inside the furnace body, a crucible, a rotatable quick-setting disk and a rotatable cooling disk are sequentially arranged along the flow direction of the material; a material dropping area is arranged on the quick-setting disk, and the crucible supplies material to the material dropping area; starting from the material dropping area, along the rotation direction of the quick-setting disk, a liquid-leveling rod and a material-leading plate are sequentially arranged on the quick-setting disk; a gap of adjustable size is arranged between the liquid-leveling rod and the surface of the quick-setting disk; the material-leading plate is used to introduce the material in the quick-setting disk into the cooling disk.

[0013] In the present invention, a variety of metal raw materials are melted into liquid alloys in a crucible and then introduced into the blanking area of ​​a rapid solidification disk. The liquid alloy is initially cooled and formed as the rapid solidification disk rotates. When passing through the liquid leveling rod, since there is an adjustable gap between the liquid leveling rod and the rapid solidification disk, the alloy thickness is limited to the set value of the gap and is rapidly cooled and formed. The rapid solidification disk rotates until it reaches the guide plate, and the guide plate is moved to the cooling disk for secondary cooling, thereby completing the cooling and forming process. The present invention is equivalent to a new development of the structure, components and layout related to cooling and forming in a vacuum induction melting device, and provides a complete cooling and forming solution. The material thickness parameter distribution area prepared by the vacuum induction melting device is relatively wide, and can cover products with a thickness of 1 to 10 mm. By controlling the thickness, the lattice size distribution can also be effectively controlled, thereby controlling the hydrogen absorption and desorption properties of the hydrogen storage alloy material, which is conducive to the preparation of hydrogen storage alloy materials with excellent performance.

[0014] The following are preferred technical solutions of the present invention, but are not intended to be limitations of the technical solutions provided by the present invention. Through the following technical solutions, the technical objectives and beneficial effects of the present invention can be better achieved and realized.

[0015] As a preferred technical solution of the present invention, the crucible is provided with a heating device; and the discharge port of the crucible is arranged at the bottom.

[0016] As a preferred technical solution of the present invention, the vacuum induction melting device is further provided with a guide piece, one end of which is connected to the discharge port of the crucible, and the other end of which is arranged in the drop zone on the rapid solidification plate.

[0017] As a preferred technical solution of the present invention, the guide member includes a guide groove and a guide groove connected in sequence; the guide groove is connected to the discharge port of the crucible, and the discharge port of the guide groove is arranged above the drop zone on the quick-setting plate.

[0018] As a preferred technical solution of the present invention, the quick-setting disk has a hollow structure, and a cooling medium flows inside the hollow structure.

[0019] As a preferred technical solution of the present invention, the quick-setting disk includes a disk surface and a disk edge surrounding the disk surface, and the disk edge is inclined toward the outer side of the disk surface.

[0020] As a preferred technical solution of the present invention, the liquid homogenizing rod is arranged on the disk surface of the rapid setting disk along the radial direction of the rapid setting disk, with one end arranged close to the center of the rapid setting disk and the other end extending to the disk edge of the rapid setting disk.

[0021] As a preferred technical solution of the present invention, the radius of the disk is 0.1 to 1m, for example, 0.1m, 0.2m, 0.3m, 0.4m, 0.5m, 0.6m, 0.7m, 0.8m, 0.9m or 1m, etc., but is not limited to the listed values, and other unlisted values ​​within the above numerical range are also applicable.

[0022] As a preferred technical solution of the present invention, the gap between the liquid uniformizing rod and the disk surface (i.e., the surface of the quick-setting disk) is 1 to 10 mm, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc., but is not limited to the listed values, and other values ​​not listed within the above numerical range are also applicable.

[0023] As a preferred technical solution of the present invention, the two ends of the liquid uniformizing rod are respectively at the same horizontal distance from the center of the disk surface and the edge of the disk, and the range of the horizontal distance is 0.2 to 10 mm, for example, 0.2 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2.2 mm, 2.6 mm, 2.9 mm, 3.4 mm, 3.6 mm, 3.9 mm, 4.2 mm, 4.5 mm, 4.8 mm, 5 mm, 5.3 mm, 5.6 mm, 5.9 mm, 6.3 mm, 6.6 mm, 7 mm, 7.2 mm, 7.5 mm, 7.8 mm, 8 mm, 8.5 mm, 8.8 mm, 9.2 mm, 9.6 mm or 10 mm, etc., but are not limited to the listed values, and other values ​​not listed within the above numerical range are also applicable.

[0024] As a preferred technical solution of the present invention, the material guide plate includes a material scraping edge, a material discharging edge and a material blocking edge;

[0025] The scraping edge is arranged on the disk surface of the quick-setting disk along the radial direction of the quick-setting disk, and one end is arranged close to the center of the quick-setting disk, and the other end extends to the disk edge until it is connected with one end of the discharge edge;

[0026] One end of the discharge edge extends from the plate edge toward the cooling plate, so that the material guide plate has a portion that exceeds the edge of the quick-setting plate;

[0027] The material blocking edge is arranged between the material shoveling edge and the material discharging edge, connecting the material shoveling edge and the material discharging edge, and a blocking edge is arranged on the material blocking edge.

[0028] As a preferred technical solution of the present invention, the material of the guide plate includes tungsten and / or molybdenum, that is, a tungsten metal plate, a molybdenum metal plate or a tungsten-molybdenum alloy plate can be selected.

[0029] As a preferred technical solution of the present invention, the material guide plate is arranged obliquely on the quick-setting disk in accordance with the rotation direction of the quick-setting disk.

[0030] As a preferred technical solution of the present invention, the orthographic projections of the quick-setting disk and the material-leading plate onto the cooling disk are both within the cooling disk; and surrounding edges are arranged around the four sides of the cooling disk.

[0031] In a second aspect, the present invention provides a vacuum melting method for an alloy material, the vacuum melting method using the vacuum induction melting device described in the first aspect; the vacuum melting method comprises: vacuum melting a metal raw material in a crucible, the crucible feeding the molten body to a blanking area of ​​a rotating rapid solidification disk, performing preliminary cooling and forming in the rapid solidification disk by a liquid homogenizing rod, the preliminary cooled and formed material falling into the rotating cooling disk through a guide plate, performing secondary cooling and forming in the cooling disk to obtain an alloy material.

[0032] As a preferred technical solution of the present invention, the liquid discharge rate of the crucible feeding the material into the material dropping zone is 0.2-10 L / min, for example, 0.2 L / min, 0.5 L / min, 0.8 L / min, 1 L / min, 2 L / min, 3 L / min, 4 L / min, 5 L / min, 6 L / min, 7 L / min, 8 L / min, 9 L / min or 10 L / min, etc.; the rotation speed of the quick solidification disk is 1-30 r / min, for example, 1 r / min, 3 r / min, 5 r / min, 8 r / min, 10 r / min, 13 r / min, 15 r / min, 18 r / min, 20 r / min, 23 r / min, 25 r / min, 28 r / min or 30 r / min, etc., but is not limited to the listed values, and other values ​​not listed within the above numerical range are also applicable.

[0033] As a preferred technical solution of the present invention, the metal raw material includes at least two of Mn, Ti, V, Fe, Al or Zr, for example, typical but non-limiting combination examples include a combination of Mn and Ti, a combination of Mn and V, a combination of Fe and Mn, a combination of Fe and Al or a combination of Al and Zr, etc. The melting temperature of the vacuum melting is 1200-2000°C, for example, 1200°C, 1300°C, 1400°C, 1500°C, 1600°C, 1700°C, 1800°C, 1900°C or 2000°C, etc., but is not limited to the listed values, and other values ​​not listed within the above numerical range are also applicable.

[0034] In the vacuum melting method of the alloy material of the present invention, the liquid discharge speed, disk radius, rotation speed and liquid leveling rod length are the output and influencing factors, covering the entire range from laboratory level to batch preparation, and the four parameters need to be coordinated. For example, when the liquid steel discharge speed is fast, if the disk radius and the liquid leveling rod length are too small, or the speed of the quick solidification disk is too slow, the quick solidification disk will carry the molten alloy too slowly, which will easily cause the molten alloy to cool and accumulate on the quick solidification disk; if the liquid discharge speed is slow, it will affect the output, and it is also possible to make the molten alloy on the quick solidification disk too thin, so that the liquid leveling rod cannot play the role of limiting the thickness. For another example, after the liquid leveling rod is height-limited, if the speed of the quick solidification disk is too fast, the molten alloy attached to the surface is too thin, which is lower than the gap between the liquid leveling rod and the disk surface. At this time, the liquid leveling rod cannot play the role of limiting the thickness; if the radius of the condensation disk is too large and the speed is too high, it will cause the problem that the alloy that has not yet condensed and formed has been diluted. In short, when performing vacuum melting of alloy materials, various influencing factors should be reasonably adjusted and matched.

[0035] Compared with the prior art solutions, the present invention has at least the following beneficial effects:

[0036] The vacuum induction melting device of the present invention sequentially completes primary cooling and secondary cooling by arranging a rotatable rapid solidification disk and a cooling disk; by arranging a material baffle plate on the rapid solidification disk, the primary cooling and forming material in the rapid solidification disk can be automatically introduced into the cooling disk for secondary cooling; by arranging a liquid leveling rod with adjustable gap on the rapid solidification disk, the thickness of the primary cooling and forming of the molten material can be adjusted and controlled, the thickness parameter distribution area is relatively wide, and can cover products with a thickness of 1 to 10 mm, and the lattice size distribution can also be effectively controlled by controlling the thickness, thereby controlling the hydrogen absorption and desorption performance of the hydrogen storage alloy material, which is conducive to the preparation of hydrogen storage alloy materials with excellent performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the vacuum induction melting device described in Example 1.

[0038] Figure 1 Middle: 10-crucible, 20-drainage trough, 30-guide trough, 40-liquid uniformizing rod, 50-leading plate, 51-shoveling edge, 52-discharging edge, 53-blocking edge, 54-blocking edge, 60-quick-setting plate, 61-plate surface, 62-plate edge, 63-dropping area, 70-cooling plate, 71-surrounding edge.

[0039] Figure 2 The pressure-composition-temperature (PCT) curves of the hydrogen storage alloys obtained in Example 1 and Comparative Example 3 are shown.

[0040] Figure 3It is a pressure-composition-temperature (PCT) curve of the hydrogen storage alloy obtained in Example 6 and Comparative Example 4. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further illustrated below through specific implementation methods.

[0042] It should be clear to those skilled in the art that the embodiments are only intended to help understand the present invention and should not be considered as specific limitations of the present invention.

[0043] Example 1

[0044] This embodiment provides a vacuum induction melting device, which includes:

[0045] A furnace body connected with a vacuum system;

[0046] Inside the furnace body, as Figure 1 As shown, a crucible 10, a rotatable quick-setting plate 60 and a rotatable cooling plate 70 are sequentially arranged along the flow direction of the material;

[0047] The crucible 10 is provided with a heating device; the discharge port of the crucible 10 is arranged at the bottom;

[0048] The quick-setting disk 60 has a hollow structure, and a cooling medium flows inside the hollow structure; the quick-setting disk 60 includes a disk surface 61 and a disk edge 62 surrounding the disk surface 61, and the disk edge 62 is inclined toward the outside of the disk surface 61; a material drop zone 63 is provided on the quick-setting disk 60; starting from the material drop zone 63, along the rotation direction of the quick-setting disk 60, a liquid-leveling rod 40 and a material guide plate 50 are sequentially provided on the quick-setting disk 60; the radius of the disk surface 61 is 0.3m, and the two ends of the liquid-leveling rod 40 are respectively at the same horizontal distance from the center of the disk surface 61 and the disk edge 62, and the range of the horizontal distance is 0.4mm;

[0049] The vacuum induction melting device is further provided with a flow guide, which includes a flow guide groove 20 and a flow guide groove 30 which are connected in sequence; the flow guide groove 20 is connected to the discharge port of the crucible 10, and the discharge port of the flow guide groove 30 is movably provided in the drop zone 63 on the quick-setting plate 60;

[0050] An adjustable gap is provided between the liquid-leveling rod 40 and the surface of the quick-setting disk 60, and the gap is adjusted to 1 mm; the liquid-leveling rod 40 is arranged on the disk surface 61 of the quick-setting disk 60 along the radial direction of the quick-setting disk 60, and one end of the liquid-leveling rod 40 is arranged close to the center of the quick-setting disk 60, and the other end extends to the disk edge 62 of the quick-setting disk 60;

[0051] The material guide plate 50 is used to guide the material in the quick-setting disk 60 into the cooling disk 70; the material guide plate 50 includes a scraping edge 51, a discharging edge 52 and a blocking edge 53; the scraping edge 51 is arranged on the disk surface 61 of the quick-setting disk 60 along the radial direction of the quick-setting disk 60, and one end is arranged close to the center of the quick-setting disk 60, and the other end extends to the disk edge 62 until it is connected with one end of the discharging edge 52; one end of the discharging edge 52 extends from the disk edge 62 to the cooling disk 70, so that the material guide plate 50 has a portion that exceeds the edge of the quick-setting disk 60; the blocking edge 53 is arranged between the scraping edge 51 and the discharging edge 52, connecting the scraping edge 51 and the discharging edge 52, and a blocking edge 54 is arranged on the blocking edge 53; the material guide plate 50 is arranged on the quick-setting disk 60 in an inclined manner in accordance with the rotation direction of the quick-setting disk 60.

[0052] The orthographic projections of the quick-setting plate 60 and the material guiding plate 50 onto the cooling plate 70 are both within the cooling plate 70 ; and the edges of the cooling plate 70 are surrounded by edges 71 .

[0053] This embodiment also provides a method for preparing a hydrogen storage alloy, the preparation method is carried out in the vacuum melting induction device, and the preparation method comprises:

[0054] Press the raw materials into Ti 0.9 Zr 0.1 Cr 0.5 Mn 1.5 The sample is mixed and sent into the crucible 10 in the furnace body, and the vacuum system is operated to melt at 1500° C. in a vacuum environment to obtain an alloy melt. At the same time, the quick-setting disk 60 and the cooling disk 70 are started and start to rotate, and the cooling medium is introduced into the hollow structure of the quick-setting disk 60;

[0055] Then the alloy melt is discharged from the bottom discharge port of the crucible 10, flows into the guide groove 30 through the drainage groove 20, and then falls into the drop zone 63 of the rotating quick solidification disk 60 through the discharge port of the guide groove 30, the gap between the liquid homogenizing rod 40 and the quick solidification disk 60 is controlled to be 1mm, the liquid discharge speed is controlled to be 2L / min, and the rotation speed of the quick solidification disk 60 is controlled to be 16r / min, and preliminary cooling and molding are performed;

[0056] The initially cooled and formed material is scooped up by the shoveling edge 51 through the material baffle plate, and gradually accumulates to the discharge edge 52 under the blocking effect of the baffle edge 54 set at the material baffle edge 53, until it falls into the cooling plate 70, and is cooled again to obtain a hydrogen storage alloy with a thickness of 1 mm.

[0057] Example 2 to Example 6

[0058] Embodiments 2 to 6 respectively provide a vacuum induction melting device, wherein the vacuum induction melting device adjusts the gap size between the liquid homogenizing rod 40 and the surface of the rapid solidification disk 60 from 1 mm to 2 mm, 4 mm, 6 mm, 8 mm and 10 mm respectively; the preparation method of the hydrogen storage alloy using each of the vacuum induction melting devices obtains hydrogen storage alloys with thicknesses of 2 mm, 4 mm, 6 mm, 8 mm and 10 mm respectively. Except for the above, other conditions are exactly the same as those in Embodiment 1.

[0059] Comparative Example 1 to Comparative Example 3

[0060] Comparative Examples 1 to 3 provide a belt-spinning furnace equipped with a water-cooled copper roller. The molten alloy can be introduced into a rotating water-cooled copper roller by a rapid solidification sheet-spinning method, solidified into a thin sheet at a large degree of supercooling, and then subjected to secondary cooling. Using the same raw materials and proportions as in Example 1, hydrogen storage alloys with thicknesses of 0.3 mm, 0.6 mm, and 1 mm are respectively prepared.

[0061] Comparative Examples 3 to 6

[0062] Comparative Examples 3 to 6 provide an ingot casting furnace, which is equipped with a water-cooled mold. The molten alloy can be introduced into the water-cooled mold by the rapid solidification ingot casting method, and the thickness of the ingot alloy can be adjusted by adjusting the gap of the water-cooled mold. Using the same raw materials and proportions as in Example 1, hydrogen storage alloys with thicknesses of 10 mm, 12 mm, and 15 mm are respectively produced.

[0063] The hydrogen storage alloys obtained in the examples and comparative examples were tested for initial hydrogen absorption kinetics at 6.0 MPa H2 and 25° C., and for hydrogen storage performance at 5 MPa H2 and 25° C. The results are recorded in Table 1.

[0064] Table 1

[0065]

[0066] From Table 1 we can see that:

[0067] For Comparative Examples 1 to 3 smelted in a belt-throwing furnace, the maximum hydrogen absorption amounts at 5Mpa H2 and 25°C were 1.74wt%, 1.75wt%, and 1.75wt%, respectively, which were significantly lower than those in the embodiments and other comparative examples, and the reversible hydrogen release amount decreased accordingly. This is because the cooling rate of the hydrogen storage alloy on the copper rod is relatively fast, and some amorphous structures will be produced during the cooling and molding process, which will reduce the hydrogen storage capacity of the product, resulting in lower mass and volume hydrogen storage density. For Comparative Examples 4 to 6 smelted in an ingot furnace, the maximum hydrogen absorption amounts at 5Mpa H2 and 25°C were 1.87wt%, 1.87wt%, and 1.88wt%, respectively, which were slightly higher than some of the embodiments, and the reversible hydrogen release amount was slightly higher than that in the embodiments, but the effective hydrogen release amount was significantly lower than that in the embodiments and other comparative examples at a hydrogen release pressure of 0.3MPa. This is because the water-cooled mold cavity of the ingot furnace is relatively large, which causes uneven cooling of the hydrogen storage alloy, and some alloys form amorphous structures and have precipitation phases, resulting in a steeper trend in the hydrogen absorption and release platform pressure. The above can be found in Figure 2 The pressure-composition-temperature (PCT) curves of Example 1 and Comparative Example 3 are compared, and Figure 3 This is confirmed by the comparison of the pressure-composition-temperature (PCT) curves of Example 6 and Comparative Example 4.

[0068] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0069] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0070] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A vacuum induction melting device, characterized in that: include: A furnace body is connected to a vacuum system; inside the furnace body, a crucible (10), a rotatable quick-setting disk (60) and a rotatable cooling disk (70) are sequentially arranged along the flow direction of the material; a material drop zone (63) is arranged on the quick-setting disk (60), and the crucible (10) supplies material to the material drop zone (63); starting from the material drop zone (63), along the rotation direction of the quick-setting disk (60), a liquid-leveling rod (40) and a material guide plate (50) are sequentially arranged on the quick-setting disk (60); a gap of adjustable size is arranged between the liquid-leveling rod (40) and the surface of the quick-setting disk (60); the material guide plate (50) is used to guide the material in the quick-setting disk (60) into the cooling disk (70).

2. The vacuum induction melting device according to claim 1, characterized in that: The crucible (10) is provided with a heating device; and the discharge port of the crucible (10) is arranged at the bottom.

3. The vacuum induction melting device according to claim 1 or 2, characterized in that: The vacuum induction melting device is also provided with a flow guide, one end of which is connected to the discharge port of the crucible (10), and the other end of which is arranged in a material drop zone (63) on the quick-setting plate (60); Preferably, the guide member comprises a guide groove (20) and a guide groove (30) which are connected in sequence; the guide groove (20) is connected to a discharge port of the crucible (10), and the discharge port of the guide groove (30) is arranged above a drop zone (63) on the quick-setting plate (60).

4. The vacuum induction melting device according to any one of claims 1 to 3, characterized in that: The quick-setting disk (60) has a hollow structure, and a cooling medium flows inside the hollow structure.

5. The vacuum induction melting device according to any one of claims 1 to 4, characterized in that: The quick-setting plate (60) comprises a plate surface (61) and a plate edge (62) surrounding the plate surface (61), and the plate edge (62) is arranged to be inclined toward the outside of the plate surface (61).

6. The vacuum induction melting device according to claim 5, characterized in that: The liquid homogenizing rod (40) is arranged on the disk surface (61) of the quick-setting disk (60) along the radial direction of the quick-setting disk (60), with one end arranged close to the center of the quick-setting disk (60) and the other end extending to the disk edge (62) of the quick-setting disk (60); Preferably, the radius of the disk surface (61) is 0.1 to 1 m; Preferably, the gap between the liquid homogenizing rod (40) and the disk surface (61) is 1 to 10 mm; Preferably, the two ends of the liquid homogenizing rod (40) are at the same horizontal distance from the center of the disk surface (61) and the disk edge (62), and the horizontal distance ranges from 0.2 to 10 mm.

7. The vacuum induction melting device according to claim 5 or 6, characterized in that: The material guiding plate (50) comprises a material scraping edge (51), a material discharging edge (52) and a material blocking edge (53); The scraping edge (51) is arranged on the disk surface (61) of the quick-setting disk (60) along the radial direction of the quick-setting disk (60), and one end is arranged close to the center of the quick-setting disk (60), and the other end extends to the disk edge (62) until it is connected with one end of the discharge edge (52); One end of the discharge edge (52) extends from the plate edge (62) toward the cooling plate (70), so that the guide plate (50) has a portion that exceeds the edge of the quick-setting plate (60); The material blocking edge (53) is arranged between the material scraping edge (51) and the material discharging edge (52), connecting the material scraping edge (51) and the material discharging edge (52), and a blocking edge (54) is arranged on the material blocking edge (53).

8. The vacuum induction melting device according to any one of claims 5 to 7, characterized in that: The material guide plate (50) is arranged on the quick-setting disk (60) at an angle in accordance with the rotation direction of the quick-setting disk (60).

9. The vacuum induction melting device according to any one of claims 1 to 8, characterized in that: The orthographic projections of the quick-setting plate (60) and the material guide plate (50) onto the cooling plate (70) are both within the cooling plate (70); and surrounding edges (71) are arranged around the edges of the cooling plate (70).

10. A vacuum melting method for alloy materials, characterized in that: The vacuum melting method uses the vacuum induction melting device according to any one of claims 1 to 9; the vacuum melting method comprises: vacuum melting the metal raw material in a crucible (10), the crucible (10) feeds the molten body to a drop zone (63) of a rotating rapid solidification disk (60), and performs preliminary cooling and forming in the rapid solidification disk (60) through a liquid homogenizing rod (40), the preliminary cooled and formed material falls into a rotating cooling disk (70) through a guide plate (50), and performs secondary cooling and forming in the cooling disk (70) to obtain an alloy material; Preferably, the liquid discharge rate of the crucible (10) feeding the material into the material drop zone (63) is 0.2 to 10 L / min, and the rotation speed of the quick-setting disk is 1 to 30 r / min; Preferably, the metal raw material includes at least two of Mn, Ti, V, Fe, Al or Zr, and the melting temperature of the vacuum melting is 1200-2000°C.

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