A vacuum induction melting device and a vacuum melting method of an alloy material

Abstract

The present application 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 solidification disc and a rotatable cooling disc. The rapid solidification disc is sequentially provided with a blanking area, a liquid uniformizing rod and a blank guiding plate. The blanking area of the rapid solidification disc is blanked by the crucible to preliminarily cool and form. The thickness of the preliminarily cooled and formed material is controlled and adjusted by the liquid uniformizing rod, and the preliminarily cooled and formed material is introduced into the cooling disc by the blank guiding plate to be secondarily cooled. The material prepared by the vacuum induction melting device has a wide thickness parameter distribution area, can effectively control the lattice size distribution, and further control the hydrogen absorption and desorption performance of the hydrogen storage alloy material, thereby being beneficial to the preparation of the hydrogen storage alloy material with excellent performance.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal material processing and manufacturing, and relates to a vacuum induction melting device and a vacuum melting method of an alloy material. BACKGROUND

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

[0003] Hydrogen storage technology refers to the technology of storing hydrogen in a physical or chemical way for release when needed. Compared with common high-pressure hydrogen storage and low-temperature liquid hydrogen storage technology, alloy hydrogen storage has the advantages of large volume hydrogen storage density, low pressure, high safety, etc., and is one of the most promising hydrogen storage methods. Under the current background, hydrogen storage, hydrogen metallurgy and other hydrogen energy applications have put forward higher requirements for alloy hydrogen storage.

[0004] The manufacturing method of hydrogen storage alloy has an important influence on the performance and cost of the alloy. Common manufacturing methods include vacuum induction melting, vacuum arc melting, vacuum suspension melting, gas atomization powdering, etc., so as to prepare metal raw materials such as La, Ni, Ti, Mn, Fe and Mg into target type hydrogen storage alloys such as AB5 type, AB2 type, AB type and superlattice type. From 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 preparation of alloy hydrogen storage materials, has the advantages of high single-batch yield, good product performance and consistency, and has been widely used in alloy melting fields such as hydrogen storage alloy and permanent magnet material.

[0005] Vacuum induction melting is a method of heating furnace charge by using electromagnetic induction to generate eddy current in metal conductor, and cooling and forming the molten charge in the same vacuum environment (usually in the furnace body). The cooling and forming process is an important step after vacuum induction melting, which has a significant influence on the performance of hydrogen storage alloy. Common cooling and forming processes include the following: 1) rapid solidification and flaking, the molten alloy is introduced into a rotating water-cooled copper roller to solidify into a thin sheet under a large supercooling degree, and then is subjected to secondary cooling; 2) water-cooled mold ingot casting, the high-temperature liquid alloy is introduced into a water-cooled mold cavity, and the heat is dissipated by cooling water to form an alloy ingot in the shape of the mold cavity; 3) cooling disc ingot casting, the high-temperature liquid alloy is directly introduced into a horizontally rotating cooling disc to cool and form a plate-shaped alloy.

[0006] However, all three forming processes have shortcomings: 1) Rapid solidification and slagging: The product thickness is mostly less than 1mm. During the cooling and forming process, the alloy will produce some amorphous structures, which will reduce the hydrogen storage capacity of the product, resulting in low mass and volume hydrogen storage density; 2) Water-cooled mold 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. The product thickness is mostly greater than 10mm, which results in poor uniformity of the alloy grain size after forming, with finer grains closer to the water-cooling plate; 3) Cooling plate casting: It also has the same problem as water-cooled mold casting: the product is thick and the grain size uniformity is poor.

[0007] It is evident that the three commonly used molding processes are relatively limited in terms of adjusting the thickness of the material, making it difficult to achieve material thicknesses of 1–10 mm. Regarding the hydrogen absorption and desorption performance of hydrogen storage materials, the rapid-condensation slab products have a relatively flat hydrogen absorption and desorption plateau, but a lower maximum hydrogen absorption capacity, resulting in a low effective hydrogen release capacity. Water-cooled mold ingots and cooling platen ingots exhibit a steeper slope in their hydrogen absorption and desorption plateau, and elemental segregation occurs. Because some applications require high hydrogen release pressure, the limited effective hydrogen release capacity of ingot products makes them unsuitable for practical applications.

[0008] Therefore, further research and development are needed on cooling and forming schemes adapted to vacuum induction melting 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 this invention is to provide a vacuum induction melting apparatus and a vacuum melting method for alloy materials. The vacuum induction melting apparatus includes a crucible, a rotatable rapid solidification plate, and a rotatable cooling plate. The rapid solidification plate is sequentially provided with a material feeding area, a uniform liquid rod, and a feed plate. The crucible feeds material into the material feeding area of ​​the rapid solidification plate for preliminary cooling and shaping. The thickness of the preliminary cooling and shaping is controlled and adjusted by the uniform liquid rod, and then the feed plate guides the preliminary cooled material into the cooling plate for secondary cooling. The material prepared by the vacuum induction melting apparatus has a wide thickness parameter distribution range, which can effectively control the lattice size distribution and thus control the hydrogen absorption and desorption performance of the hydrogen storage alloy material, thereby facilitating the preparation of high-performance hydrogen storage alloy materials.

[0010] To achieve this objective, the present invention adopts the following technical solution:

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

[0012] The furnace body is connected to a vacuum system. Inside the furnace body, a crucible, a rotatable rapid solidification plate, and a rotatable cooling plate are arranged sequentially along the material flow direction. A material feeding area is provided on the rapid solidification plate, and the crucible feeds material into the material feeding area. Starting from the material feeding area, along the rotation direction of the rapid solidification plate, a uniform liquid rod and a feed plate are also arranged sequentially on the rapid solidification plate. An adjustable gap is provided between the uniform liquid rod and the surface of the rapid solidification plate. The feed plate is used to introduce the material in the rapid solidification plate into the cooling plate.

[0013] In this invention, various metal raw materials are melted into a liquid alloy in a crucible and then introduced onto the material feeding area of ​​a rapid solidification disc. The liquid alloy undergoes initial cooling and shaping as the disc rotates. When passing the uniform liquid rod, the alloy thickness is limited to a set value due to the adjustable gap between the rod and the disc, allowing for rapid cooling and shaping. As the disc rotates, the alloy reaches the feed plate, where it is transferred to a cooling disc for secondary cooling, thus completing the cooling and shaping process. This invention represents a new development of the structures, components, and layout related to cooling and shaping in a vacuum induction melting device, providing a complete cooling and shaping solution. The material prepared by this vacuum induction melting device has a wide thickness distribution range, covering products with a thickness of 1–10 mm. Furthermore, controlling the thickness effectively controls the lattice size distribution, thereby controlling the hydrogen absorption and desorption performance of the hydrogen storage alloy material, which is beneficial for preparing high-performance hydrogen storage alloy materials.

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

[0015] As a preferred embodiment of the present invention, the crucible is equipped with a heating device; the discharge port of the crucible is located at the bottom.

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

[0017] As a preferred embodiment of the present invention, the flow guide includes a flow guide trough and a flow channel connected in sequence; the flow guide trough is connected to the discharge port of the crucible, and the discharge port of the flow channel is located above the material drop area on the rapid solidification plate.

[0018] As a preferred embodiment of the present invention, the rapid condensation plate has a hollow structure, and a cooling medium flows inside the hollow structure.

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

[0020] As a preferred embodiment of the present invention, the uniform liquid rod is disposed on the surface of the quick-setting plate along the radial direction of the quick-setting plate, with one end positioned close to the center of the quick-setting plate and the other end extending to the edge of the quick-setting plate.

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

[0022] As a preferred technical solution of the present invention, the gap between the uniform liquid rod and the disk surface (i.e. the surface of the rapid coagulation disk) is 1 to 10 mm, such as 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, but is not limited to the listed values. Other unlisted values ​​within the above range are also applicable.

[0023] As a preferred embodiment of the present invention, the two ends of the uniform liquid rod are at the same horizontal distance from the center of the disk and the edge of the disk, respectively, and the horizontal distance ranges from 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, but are not limited to the listed values; other unlisted values ​​within the above range are also applicable.

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

[0025] The shovel edge is arranged on the surface of the quick-setting disc along the radial direction of the quick-setting disc, with one end set close to the center of the quick-setting disc and the other end extending to the edge of the disc until it connects with one end of the discharge edge.

[0026] One end of the discharge edge extends from the edge of the disc toward the cooling disc, such that the feed plate has a portion that extends beyond the edge of the quick-setting disc;

[0027] The material blocking edge is disposed between the material shoveling edge and the material discharge edge, connecting the material shoveling edge and the material discharge edge, and the material blocking edge is provided with a retaining edge.

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

[0029] As a preferred embodiment of the present invention, the feed plate is inclined on the quick-setting disc in accordance with the rotation direction of the quick-setting disc.

[0030] As a preferred embodiment of the present invention, the orthographic projections of the quick-setting plate and the feed plate onto the cooling plate are both within the cooling plate; the cooling plate is provided with a surrounding edge around its perimeter.

[0031] In a second aspect, the present invention provides a vacuum melting method for alloy materials, wherein the vacuum melting method uses the vacuum induction melting apparatus described in the first aspect; the vacuum melting method includes: vacuum melting of metal raw materials in a crucible, the crucible feeding the melt into the feeding area of ​​a rotating rapid solidification plate, preliminary cooling and shaping in the rapid solidification plate by a uniform liquid rod, the preliminary cooled and shaped material falling into a rotating cooling plate through a feed plate, and secondary cooling and shaping in the cooling plate to obtain the alloy material.

[0032] As a preferred embodiment of the present invention, the liquid discharge rate of the crucible to the material feeding zone is 0.2 to 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; the rotation speed of the rapid solidification disc is 1 to 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, but is not limited to the listed values, and other unlisted values ​​within the above range are also applicable.

[0033] As a preferred embodiment of the present invention, the metal raw material includes at least two of Mn, Ti, V, Fe, Al, or Zr. Typical but non-limiting combinations include Mn and Ti, Mn and V, Fe and Mn, Fe and Al, or Al and Zr. The melting temperature for vacuum melting is 1200–2000°C, such as 1200°C, 1300°C, 1400°C, 1500°C, 1600°C, 1700°C, 1800°C, 1900°C, or 2000°C, but is not limited to the listed values; other unlisted values ​​within the above range are also applicable.

[0034] In the vacuum melting method for alloy materials described in this invention, the molten steel discharge rate, disk radius, rotation speed, and uniform rod length are factors affecting yield and overall production, covering the entire range from laboratory-scale to mass production. These four parameters need to be coordinated. For example, if the molten steel discharge rate is fast, and the disk radius and uniform rod length are too small, or the rapid solidification disk rotation speed is too slow, the rapid solidification disk will carry the molten alloy too slowly, easily causing the molten alloy to accumulate on the rapid solidification disk during cooling. If the discharge rate is slow, it will affect the yield and may also result in the molten alloy on the rapid solidification disk being too thin, rendering the uniform rod ineffective in limiting thickness. Furthermore, if the uniform rod is height-limited, and the rapid solidification disk rotation speed is too fast, the molten alloy adhering to the surface will be too thin, falling below the gap between the uniform rod and the disk surface. In this case, the uniform rod cannot limit thickness. If the cooling disk radius is too large and the rotation speed is too high, the alloy will thin out before it has solidified. In short, when performing vacuum melting of alloy materials, all influencing factors should be reasonably adjusted and coordinated.

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

[0036] The vacuum induction melting apparatus of this invention completes preliminary cooling and secondary cooling in sequence by setting a rotatable rapid solidification plate and a cooling plate. By setting a baffle on the rapid solidification plate, the material in the preliminary cooling plate can be automatically introduced into the cooling plate for secondary cooling. By setting an adjustable liquid leveling bar on the rapid solidification plate, the thickness of the molten material in the preliminary cooling and forming can be adjusted and controlled. The thickness parameter distribution area is relatively wide, which can cover products with a thickness of 1-10 mm. By controlling the thickness, the lattice size distribution can also be effectively controlled, thereby controlling the hydrogen absorption and desorption performance of the hydrogen storage alloy material, which is beneficial to preparing high-performance hydrogen storage alloy materials. Attached Figure Description

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

[0038] Figure 1 In the middle: 10-crucible, 20-flow channel, 30-flow guide channel, 40-uniform liquid rod, 50-feeding plate, 51-shovel edge, 52-discharge edge, 53-blocking edge, 54-stop edge, 60-rapid solidification 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 3The pressure-composition-temperature (PCT) curves of the hydrogen storage alloys obtained in Example 6 and Comparative Example 4 are shown. Detailed Implementation

[0041] The technical solution of the present invention will be further illustrated below through specific embodiments.

[0042] Those skilled in the art will understand that the embodiments described are merely illustrative of the invention and should not be construed as limiting the invention.

[0043] Example 1

[0044] This embodiment provides a vacuum induction melting apparatus, the vacuum induction melting apparatus comprising:

[0045] The furnace body is connected to a vacuum system;

[0046] Inside the furnace body, such as Figure 1 As shown, a crucible 10, a rotatable rapid solidification plate 60, and a rotatable cooling plate 70 are arranged sequentially along the material flow direction.

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

[0048] The rapid solidification disc 60 has a hollow structure, and a cooling medium flows through the hollow structure. The rapid solidification disc 60 includes a disc surface 61 and a disc edge 62 surrounding the disc surface 61, with the disc edge 62 inclined towards the outside of the disc surface 61. The rapid solidification disc 60 is provided with a material dropping area 63. Starting from the material dropping area 63, along the rotation direction of the rapid solidification disc 60, a liquid distribution rod 40 and a material guiding plate 50 are also sequentially provided on the rapid solidification disc 60. The radius of the disc surface 61 is 0.3m, and the two ends of the liquid distribution rod 40 are equidistant from the center of the disc surface 61 and the disc edge 62, respectively, with the horizontal distance ranging from 0.4mm.

[0049] The vacuum induction melting device is also provided with a flow guide, which includes a flow guide trough 20 and a flow guide trough 30 connected in sequence; the flow guide trough 20 is connected to the discharge port of the crucible 10, and the discharge port of the flow guide trough 30 is movably disposed in the material drop area 63 on the rapid solidification plate 60.

[0050] The surface of the uniform liquid rod 40 and the quick-setting plate 60 are provided with an adjustable gap, which can be adjusted to 1mm; the uniform liquid rod 40 is arranged on the plate surface 61 of the quick-setting plate 60 along the radial direction of the quick-setting plate 60, with one end set close to the center of the quick-setting plate 60 and the other end extending to the edge 62 of the quick-setting plate 60.

[0051] The feeding plate 50 is used to introduce the material in the quick-setting plate 60 into the cooling plate 70; the feeding plate 50 includes a scraping edge 51, a discharge edge 52, and a retaining edge 53; the scraping edge 51 is arranged radially on the plate surface 61 of the quick-setting plate 60, with one end near the center of the quick-setting plate 60 and the other end extending to the plate edge 62 until it connects with one end of the discharge edge 52; one end of the discharge edge 52 extends from the plate edge 62 towards the cooling plate 70, so that the feeding plate 50 has a portion extending beyond the edge of the quick-setting plate 60; the retaining edge 53 is arranged between the scraping edge 51 and the discharge edge 52, connecting the scraping edge 51 and the discharge edge 52, and the retaining edge 53 is provided with a retaining edge 54; the feeding plate 50 is inclined on the quick-setting plate 60 in accordance with the rotation direction of the quick-setting plate 60.

[0052] The orthographic projections of the quick-setting plate 60 and the feed plate 50 onto the cooling plate 70 are both within the cooling plate 70; the cooling plate 70 is provided with a perimeter 71 around its four edges.

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

[0054] The raw materials are classified according to Ti. 0.9 Zr 0.1 Cr 0.5 Mn 1.5 The proportioned sample is fed into the crucible 10 inside the furnace. The vacuum system is run and the alloy melt is obtained at 1500°C in a vacuum environment. At the same time, the rapid solidification plate 60 and the cooling plate 70 are started to rotate and the cooling medium is introduced into the hollow structure of the rapid solidification plate 60.

[0055] Then, the alloy melt is discharged from the bottom outlet of the crucible 10, flows through the guide channel 20 to the guide channel 30, and then falls into the dropping area 63 of the rapidly solidifying plate 60, which has already started to rotate, through the outlet of the guide channel 30. The gap between the uniform liquid rod 40 and the rapidly solidifying plate 60 is controlled to be 1 mm, the liquid discharge rate is controlled to be 2 L / min, and the rotation speed of the rapidly solidifying plate 60 is controlled to be 16 r / min for preliminary cooling and shaping.

[0056] The material that has been initially cooled and shaped is scooped up by the baffle plate and the scooping edge 51. Under the obstruction of the baffle edge 54 set on the baffle edge 53, it gradually accumulates to the discharge edge 52 until it falls into the cooling plate 70 for secondary cooling, resulting in a hydrogen storage alloy with a thickness of 1mm.

[0057] Examples 2 to 6

[0058] Examples 2 to 6 each provide a vacuum induction melting apparatus. The gap between the surface of the homogenizing rod 40 and the surface of the rapid solidification plate 60 is adjusted from 1 mm to 2 mm, 4 mm, 6 mm, 8 mm and 10 mm respectively. The hydrogen storage alloy preparation method using each of the vacuum induction melting apparatuses yields hydrogen storage alloys with thicknesses of 2 mm, 4 mm, 6 mm, 8 mm and 10 mm respectively. Except for the above, the other conditions are exactly the same as in Example 1.

[0059] Comparative Examples 1 to 3

[0060] Comparative Examples 1 to 3 provide a strip spinning furnace equipped with a water-cooled copper roller. The alloy, which is molten into liquid, is introduced onto the rotating water-cooled copper roller by a rapid solidification and spinning method. The alloy solidifies into a thin sheet under a large degree of supercooling and then undergoes 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 obtained respectively.

[0061] Comparative Examples 3 to 6

[0062] Comparative Examples 3 to 6 provide an ingot casting furnace equipped with a water-cooled mold. The alloy, which is molten into liquid, can be introduced into the water-cooled mold by a rapid solidification casting method. 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 obtained respectively.

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

[0064] Table 1

[0065]

[0066] As can be seen from Table 1:

[0067] Comparative Examples 1 to 3, smelted using a spinning furnace, showed significantly lower maximum hydrogen absorption capacities (1.74 wt%, 1.75 wt%, and 1.75 wt%) at 5 MPa H2 and 25°C compared to the examples and other comparative examples, with a corresponding decrease in reversible hydrogen release. This is because the hydrogen storage alloy cools rapidly on the copper rod, generating some amorphous structures during the cooling and forming process, which reduces the product's hydrogen storage capacity, resulting in lower mass and volumetric hydrogen storage densities. Comparative Examples 4 to 6, smelted using an ingot furnace, showed slightly higher maximum hydrogen absorption capacities (1.87 wt%, 1.87 wt%, and 1.88 wt%) at 5 MPa H2 and 25°C compared to some examples, with slightly higher reversible hydrogen release. However, their effective hydrogen release at a release pressure of 0.3 MPa was significantly lower than that of the examples and other comparative examples. This is because the water-cooled mold cavity of the ingot furnace is large, leading to uneven cooling of the hydrogen storage alloy, the formation of amorphous phases in some alloys, and the presence of precipitated phases, resulting in a steeper trend in the hydrogen absorption and release plateau pressure. The above can be found Figure 2 Comparison of the pressure-composition-temperature (PCT) curves of Example 1 and Comparative Example 3, 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 have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within 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 describe the various possible combinations separately.

[0070] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A vacuum induction melting apparatus, characterized in that, include: A furnace body is connected to a vacuum system. Inside the furnace body, a crucible (10), a rotatable quick-setting plate (60), and a rotatable cooling plate (70) are arranged sequentially along the material flow direction. A material discharge area (63) is provided on the quick-setting plate (60), and the crucible (10) supplies material to the material discharge area (63). Starting from the material discharge area (63), along the rotation direction of the quick-setting plate (60), a uniform liquid rod (40) and a feed plate (50) are also arranged sequentially on the quick-setting plate (60). An adjustable gap is provided between the uniform liquid rod (40) and the surface of the quick-setting plate (60). The feed plate (50) is used to introduce the material in the quick-setting plate (60) into the cooling plate (70). 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 is located in the material drop area (63) on the quick-solidifying plate (60); the flow guide includes a flow guide trough (20) and a flow guide trough (30) connected in sequence; the flow guide trough (20) is connected to the discharge port of the crucible (10), and the discharge port of the flow guide trough (30) is located above the material drop area (63) on the quick-solidifying plate (60); The quick-setting disc (60) includes a disc surface (61) and a disc edge (62) surrounding the disc surface (61), the disc edge (62) being inclined toward the outside of the disc surface (61); The homogenizing rod (40) is arranged on the surface (61) of the quick-setting plate (60) along the radial direction of the quick-setting plate (60), with one end set close to the center of the quick-setting plate (60) and the other end extending to the edge (62) of the quick-setting plate (60).

2. The vacuum induction melting apparatus according to claim 1, characterized in that, The crucible (10) is equipped with a heating device; the outlet of the crucible (10) is located at the bottom.

3. The vacuum induction melting apparatus according to claim 1, characterized in that, The condenser plate (60) has a hollow structure, and a cooling medium flows inside the hollow structure.

4. The vacuum induction melting apparatus according to claim 1, characterized in that, The radius of the disk (61) is 0.1~1m.

5. The vacuum induction melting apparatus according to claim 1, characterized in that, The gap between the uniform liquid rod (40) and the disk surface (61) is 1~10mm.

6. The vacuum induction melting apparatus according to claim 1, characterized in that, The two ends of the uniform liquid rod (40) are at the same horizontal distance from the center of the disk surface (61) and the edge of the disk (62), respectively, and the horizontal distance ranges from 0.2 to 10 mm.

7. The vacuum induction melting apparatus according to claim 1, characterized in that, The feed plate (50) includes a scraping edge (51), a discharge edge (52), and a blocking edge (53); The shovel edge (51) is arranged on the surface (61) of the quick-setting disc (60) along the radial direction of the quick-setting disc (60), with one end set close to the center of the quick-setting disc (60) and the other end extending to the edge (62) until it connects with one end of the discharge edge (52). One end of the discharge edge (52) extends from the edge of the disc (62) toward the cooling disc (70), such that the feed plate (50) has a portion extending beyond the edge of the quick-setting disc (60); The material blocking edge (53) is disposed between the material shoveling edge (51) and the material discharge edge (52), connecting the material shoveling edge (51) and the material discharge edge (52), and a retaining edge (54) is provided on the material blocking edge (53).

8. The vacuum induction melting apparatus according to claim 1, characterized in that, The feed plate (50) is inclined on the quick-setting plate (60) in accordance with the rotation direction of the quick-setting plate (60).

9. The vacuum induction melting apparatus according to claim 1, characterized in that, The orthographic projections of the quick-setting plate (60) and the feed plate (50) onto the cooling plate (70) are both within the cooling plate (70); the cooling plate (70) is provided with a perimeter edge (71) around its four sides.

10. A vacuum melting method for an alloy material, characterized in that, The vacuum melting method uses the vacuum induction melting apparatus according to any one of claims 1-9; the vacuum melting method includes: vacuum melting of metal raw materials in a crucible (10), the crucible (10) feeding the melt to the dropping area (63) of a rotating rapid solidification plate (60), preliminary cooling and shaping in the rapid solidification plate (60) by a uniform liquid rod (40), the preliminary cooled and shaped material falling into a rotating cooling plate (70) through a feed plate (50), and secondary cooling and shaping in the cooling plate (70) to obtain an alloy material.

11. The vacuum melting method for alloy materials according to claim 10, characterized in that, The liquid discharge rate of the crucible (10) to the material discharge zone (63) is 0.2~10L / min, and the rotation speed of the quick-freezing plate is 1~30r / min.

12. The vacuum melting method for alloy materials according to claim 10, characterized in that, The metal raw material includes at least two of Mn, Ti, V, Fe, Al or Zr, and the melting temperature of the vacuum melt is 1200~2000℃.

Images