Electron beam refining continuous casting recovery device and method for casting high-temperature alloy high-quality product return scraps

Abstract

The invention provides an electron beam refining continuous casting recovery device and method for casting high-temperature alloy fine product return scraps, and belongs to the technical field of high-temperature alloys, the electron beam refining continuous casting recovery device comprises a furnace body, a smelting crucible, a hydraulic turnover device, a casting solidification crucible, a molecular pump, a mechanical pump, a diffusion pump and a Roots pump, the smelting crucible, the hydraulic turnover device and the casting solidification crucible are located in the furnace body, and the molecular pump, the mechanical pump, the diffusion pump and the Roots pump are located outside the furnace body. The feeding device, the cooling system and the electronic gun are communicated with the inside and the outside of the furnace body. According to the invention, the pretreated cast high-temperature alloy fine return material is flatly laid above the feeding device, the feeding device is utilized to slowly and horizontally push the cast high-temperature alloy return material into the smelting crucible, and continuous casting is carried out after electron beam refining. Through the bombardment effect of the high-energy electron beam and the large overheating environment of the alloy melt, bombardment decomposition or overheating melting removal of the refractory inclusions can be promoted; the method can be used for preparing ultra-pure and high-homogeneity return scrap cast ingots, and solves the problems of accumulation and low recycling rate of cast high-temperature alloy high-quality return scraps in different forms.

Description

Technical Field

[0001] The invention belongs to the technical field of high-temperature alloys and relates to an electron beam refining continuous casting recovery device and method for casting high-temperature alloy fine return materials. Background Art

[0002] Cast superalloys are the primary materials used to manufacture blade components such as turbine blades and guide vanes for aircraft engines and gas turbines. As the service temperatures and strengths of aircraft engines and gas turbines continue to rise, cast superalloy blades are trending toward thinner-walled, hollow blades. However, current cast superalloy materials suffer from poor processability, and the yield rate of casting processes is low. According to literature reports, the final weight of a finished cast superalloy blade component accounts for only approximately 30% of the weight of the parent alloy. A significant amount of parent alloy becomes scrap due to casting defects such as stray crystals, failed crystal selection, and sand sticking during the casting process. Furthermore, the continued increase in the use of cast superalloys has generated a significant amount of return material, including runners, risers, and crystal selectors. Because cast superalloys often contain rare and expensive metallic elements such as Re and Hf, the accumulation of such waste material not only represents a significant waste of strategic resources but also increases the manufacturing cost of components such as cast superalloy blades. To reduce production costs and improve resource efficiency, there is an urgent need to utilize cast superalloy return material in the production of parent alloys.

[0003] Currently, high-temperature alloy return materials are primarily processed in China through vacuum induction melting or a dual-process of vacuum induction melting and electroslag remelting. However, due to the high impurity and inclusion content in return materials, relying solely on high vacuum, prolonged refining, or the use of specialized crucible materials is insufficient to meet the quality requirements for ultra-pure, high-homogeneity superalloys used in aircraft engines and gas turbines. Consequently, in the actual production of return materials, high-quality superalloys are often downgraded to common nickel-containing metals, resulting in a significant waste of strategic resources. While the utilization rate of high-temperature alloy return materials in Europe and the United States reaches 70%-80%, in China, it is only around 15%, primarily in the wrought superalloy sector. This is primarily due to the fact that, unlike wrought superalloys, active elements such as Hf and Ta in cast superalloys, in addition to Al and Ti, are highly susceptible to interfacial reactions with the ceramic shell or core during the casting process, forming refractory oxide inclusions such as HfO₂ and Ta₂O₅. These inclusions are difficult to remove under the temperature and melting conditions of vacuum induction melting. On the other hand, compared with new alloy materials, the content of impurity elements such as O, N, and S in the returned materials of cast high-temperature alloys is higher. The impurity content in the returned ingots of cast high-temperature alloys prepared by traditional smelting process has not yet broken through the transformation limit of melt properties, resulting in a series of problems in the subsequent use of the returned alloy ingots, such as poor casting processability, low blade preparation qualification rate, and parts service performance not reaching the level of new materials.

[0004] Therefore, the inventor's team pioneered the use of electron beam refining technology in China to purify high-temperature alloy return materials (Chinese invention patent CN112760508A). This process utilizes the high-purity, high-vacuum environment of the electron beam refining process to promote the removal of impurity elements from the alloy melt, preventing further reaction and doping between the alloy melt and the crucible material and the vacuum atmosphere. Simultaneously, the Marangoni melt flow and directional solidification unique to electron beam refining promote the directional migration of small-sized inclusions in the alloy melt and induce their accumulation on the molten pool surface. Ultimately, the bombardment of the high-energy electron beam and the high superheat of the alloy melt promote the bombardment and decomposition of refractory inclusions or their removal by superheated melting. However, existing electron beam refining technology and methods are not suitable for high-quality cast high-temperature alloy return materials. Due to the diverse sizes and shapes of high-quality cast high-temperature alloy return materials, multiple stacking steps are typically required, resulting in low production efficiency.

[0005] Based on this technical principle and process, we have developed related technologies, including electron beam layer coagulation to produce ultra-pure, high-homogeneity superalloys, electron beam cold-hearth furnace refining of superalloys, and electron beam drip melting of superalloys. However, for cast superalloy return materials, the current method primarily utilizes a combination of vacuum induction melting and electron beam refining. For example, Chinese invention patents (CN117701895A, CN117701896A, CN117701897A, CN117701898A, CN117701899A, and CN117845068A) all disclose methods that first perform vacuum induction melting of the superalloy return material, followed by remelting using electron beam drip melting. While this method can reduce the inclusion content of the return material to that of new material, the return material undergoes two melting processes, namely vacuum induction melting and electron beam melting, resulting in significant alloying element loss, increasing melting costs. Summary of the Invention

[0006] To address the above issues, the present invention proposes a technology for recycling cast high-temperature alloy return material entirely through electron beam refining and continuous casting. The technology provides an apparatus and method for electron beam refining and continuous casting of high-quality cast high-temperature alloy return material. The present invention involves laying pre-treated high-quality cast high-temperature alloy return material flat on top of a feeding device. The feeding device then slowly pushes the cast high-temperature alloy return material horizontally into a melting crucible. After electron beam refining, continuous casting is performed, solving the problem of multiple stacking and low recycling rates of small and medium-sized cast high-temperature alloy return material.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] An electron beam refining and continuous casting recovery device for casting high-quality high-temperature alloy return materials, comprising a furnace body, a melting crucible located inside the furnace body, a hydraulic turning device, a casting and solidification crucible, a molecular pump, a mechanical pump, a diffusion pump, a Rhodes pump located outside the furnace body, and a feeding device, a cooling system, and an electron gun connected to the interior and exterior of the furnace body. Specifically:

[0009] There are two mechanical pumps. The first mechanical pump is connected to the electron gun via a molecular pump. Valves are provided on the connecting paths between the first mechanical pump and the molecular pump, and between the molecular pump and the electron gun, respectively, to control the vacuuming process. The second mechanical pump is connected to one end of a Rhodes pump. The other end of the Rhodes pump is divided into two branches, one of which is connected to the furnace body via a valve, and the other is connected to a diffusion pump via a valve. The diffusion pump is also connected to the furnace body via a valve.

[0010] The electron gun is located at the top of the furnace body and penetrates deep into the furnace body to emit an electron beam, which is used to melt and refine the high-temperature alloy return material for casting. The maximum melting power of the electron gun is 300kW, the rated voltage is 30kV, the beam current range is 0~1000mA, and the beam spot diameter is 5~10mm.

[0011] The melting crucible is located in the lower middle part of the furnace body and on the left side. It is made of pure copper to avoid contamination of the refractory crucible material. Its bottom is equipped with a hydraulic tilting device, which realizes the tilting and dumping function of the melting crucible through the hydraulic tilting device, ensuring the stability and uniformity of the casting process. The melting crucible is a top-opening container for melting and refining the return material of the casting high-temperature alloy. The diameter of the upper end is 300-400 mm, the diameter of the bottom end is 200-300 mm, and the depth is 100-150 mm. It has a pouring spout on the side close to the casting and solidification crucible for draining the alloy melt so that it can be accurately cast into the casting and solidification crucible.

[0012] The feeding device feeds materials from the middle of the furnace body, above the melting crucible, on which the high-temperature alloy fine material is placed. The feeding device is connected to the furnace body through a closed chamber. The chamber door is opened when material is needed, and the material is transported by a crawler belt during feeding.

[0013] The casting and solidification crucible is located at the bottom and right side of the furnace body. Its top is open, directly below the pouring spout of the melting crucible. A hydraulic tilting device allows the alloy melt in the melting crucible to be poured into the casting and solidification crucible. The casting and solidification crucible uses a pneumatically fixed-track detachable copper mold with a diameter of 80-200mm and a height of 300-800mm. This allows for the casting and solidification crucible to be removable and disassembled, facilitating the removal of large quantities of return ingots after casting.

[0014] The furnace body is also provided with a cooling system, including cooling water pipes, a cooling tower, a water cooler and other parts, which can maintain the normal temperature of the electron beam melting furnace and its vacuum system to prevent overheating alarms.

[0015] Furthermore, a transparent observation window is provided on the top of the furnace body for observing the state of the alloy melt during electron beam refining and casting, ensuring that the alloy melt is fully melted and refined, and the alloy melt is smoothly poured into the bottom of the casting and solidification crucible.

[0016] A method for recovering high-temperature alloy high-quality return materials through electron beam refining and continuous casting is provided, which is based on the above-mentioned electron beam refining and continuous casting recovery device and specifically comprises the following steps:

[0017] The first step is to shot peen the high-temperature alloy casting return material;

[0018] The second step is to evacuate the interior of the furnace and start the electron gun for preheating after reaching the target vacuum degree. After the preheating is completed, the return material melting stage begins.

[0019] The third step is to process the high-temperature alloy return material through electron beam to achieve melting;

[0020] Step 3.1, using a feeding device to horizontally push the high-temperature alloy fine materials of different shapes and sizes into the melting crucible;

[0021] Step 3.2, adjusting the melting power of the electron gun, so that the electron beam acts on the surface of the return material in the melting crucible to melt it, and the high-temperature alloy fine return material is melted by the electron beam;

[0022] Step 3.3: After the high-temperature alloy return material is fully melted, adjust the refining power of the electron beam. After refining, start the hydraulic turning device of the melting crucible to pour the alloy melt into the casting and solidification crucible, and slowly cool it under the action of the cooling system.

[0023] Step 4: Continue to collect the returned alloy ingots;

[0024] In step 4.1, continue feeding the material into the melting crucible through the feeding device, repeat the third step until the casting and solidification crucible is full, turn off the electron gun, continue to keep the alloy ingot in the vacuum environment to cool for 2-5 hours, release the vacuum of the furnace body, open the furnace door and take out the ultra-pure return material alloy ingot;

[0025] Step 4.2: Test the returned alloy ingots. The returned alloy ingots that meet the factory standards after testing need to be machined. Use a lathe to peel the returned alloy ingots to ensure that the surface of the returned alloy ingots is smooth.

[0026] Furthermore, in the first step, the high-temperature alloy blade production line is sorted by the processing and quality inspection departments to collect high-temperature alloy return materials, mainly including runners, risers, sprues and crystal selectors. The high-temperature alloy return materials are shot peened with nickel beads to remove large pieces of ceramic shells adhering to the outer surface of the high-temperature alloy return materials at the runners, risers, sprues or crystal selectors. The shot peening process uses compressed air as the power, with a shot peening pressure of 0.2~0.7MPa, a nickel shot particle size of 0.1~0.5mm, and a shot peening time of 1min~60min. Finally, the shot peened high-temperature alloy return materials are blown and dried to remove dust, oil and moisture on the surface of the return materials.

[0027] Furthermore, in the second step, first, clean the attachments on the wall of the melting crucible, the furnace chamber and the observation window surface, use a vacuum cleaner to remove the scattered and adhered pollutants, and after confirming that the furnace body is clean, close the furnace door and then vacuumize. The vacuuming process is as follows: first, use a mechanical pump and a molecular pump to pump the vacuum degree inside the electron gun to 5×10 ~3 Pa, and then use a mechanical pump and a Rhodes pump to pump the vacuum degree inside the furnace to above 50Pa, and finally use a diffusion pump to pump the vacuum degree inside the furnace to 5×10 ~3 Pa or above to reach the target vacuum degree; the preheating time is 10 to 20 minutes.

[0028] Furthermore, in the third step:

[0029] In step 3.2, the electron gun melting power is slowly adjusted to 4-14 kW, the electron beam acts on the surface of the return material in the melting crucible to slowly melt it, the electron beam scanning frequency is set to 20-40 Hz, the scanning mode is surface scanning, and the high-temperature alloy fine return material is fully melted for 30-90 minutes;

[0030] In step 3.3, after the high-temperature alloy fine material is fully melted, the electron beam refining power is adjusted to 30-50 kW and the refining time is 30-60 min to promote the sinking of high-density inclusion particles into the melting crucible and the floating of small-sized inclusion particles to the surface of the melting crucible and be decomposed by the electron beam spot bombardment;

[0031] Furthermore, in step 4.2, the detection method is: use a wire cutting machine to take samples from the top and bottom of the returned alloy ingot for composition detection, oxygen, nitrogen and sulfur impurity content detection, and inclusion content and size distribution detection to determine whether the returned ingot meets the standard composition and whether the purity reaches or exceeds the level of new material: if it passes the test, the subsequent machining procedure is carried out; if there are still casting defects or it does not meet the factory standards, continue to the third step and adjust the composition of the cast high-temperature alloy ingot.

[0032] The beneficial effects of the present invention are:

[0033] (1) During the preparation process of casting high-temperature alloy blades, fine return materials such as runners, risers, sprues, crystal selectors, and machining debris are usually produced. Such fine return materials usually have different shapes and sizes, so they need to be remelted once through vacuum induction melting, and then remelted through processes such as electron beam refining or electroslag remelting. The process is long and the cost is high. This patent proposes an electron beam refining continuous casting recovery device and method for casting high-temperature alloy fine return materials. First, the casting high-temperature alloy fine return materials are pretreated efficiently and at low cost. Then, for casting high-temperature alloy return materials of different shapes and types, the present invention designs a continuous feeding device, a hydraulic turning device, and a casting and solidification crucible, and develops a new electron beam refining continuous casting process. Through continuous feeding, continuous melting, and continuous casting, ultra-pure and high-homogeneity return material ingots are prepared, solving the problem of accumulation and low recycling rate of casting high-temperature alloy fine return materials of different shapes.

[0034] (2) The present invention utilizes the high-purity and high-vacuum environment during the electron beam refining process and adopts ultra-pure copper melting crucibles and casting and solidification crucibles to promote the removal of impurity elements in the alloy melt and avoid further reaction and doping of the alloy melt with the crucible material and the vacuum atmosphere. At the same time, relying on the Marangoni melt flow and directional solidification unique to electron beam refining, the directional migration of small-sized inclusions in the alloy melt and their induction enrichment to the molten pool surface are promoted. Finally, through the bombardment of high-energy electron beams and the large overheating environment of the alloy melt, the bombardment decomposition or overheating melting removal of refractory inclusions is promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the electron beam continuous refining device and method for recovering high-temperature alloy return materials.

[0036] Figure 2 Schematic diagram of a continuous casting device and method for recycling return materials of high-temperature alloy casting products.

[0037] In the figure: 1 molecular pump; 2 valve; 3 mechanical pump; 4 high-temperature alloy casting fine return material; 5 feeding device; 6 melting crucible; 7 hydraulic turning device; 8 cooling system; 9 observation window; 10 electron gun; 11 electron beam; 12 pouring nozzle; 13 casting and solidification crucible; 14 diffusion pump; 15 Rhodes pump; 16 furnace body. DETAILED DESCRIPTION

[0038] The present invention is further described below with reference to specific implementation cases.

[0039] The electron beam refining continuous casting recovery device for casting high-temperature alloy fine return material used in the embodiment of the present invention is as follows Figure 1 As shown, the electron beam refining continuous casting recovery device includes a furnace body 16, a melting crucible 6, a hydraulic turning device 7, a pouring nozzle 12, and a casting and solidification crucible 13 located inside the furnace body 16, a molecular pump 1, a mechanical pump 3, a diffusion pump 14, and a Rhodes pump 15 located outside the furnace body 16, and a feeding device 5, a cooling system 8, and an electron gun 10 that are connected to the inside and outside of the furnace body 16. Specifically:

[0040] There are two mechanical pumps 3. The first mechanical pump 3 is connected to the electron gun 10 via a molecular pump 1. Valves 2 are provided on the connecting paths between the first mechanical pump 3 and the molecular pump 1, and between the molecular pump 1 and the electron gun 10. The second mechanical pump 3 is connected to one end of a Rhodes pump 15. The other end of the Rhodes pump 15 is divided into two branches: one branch is connected to the furnace body 16 via a valve 2, and the other branch is connected to the diffusion pump 14 via a valve 2. The diffusion pump 14 is also connected to the furnace body 16 via a valve 2.

[0041] The electron gun 10 is located on the top of the furnace body 16 and extends deep into the furnace body 16 for emitting an electron beam 11 .

[0042] The melting crucible 6 is located in the lower center portion of the furnace body 16 and on the left side. Made of pure copper, its bottom surface is equipped with a hydraulic tilting device 7, which allows the melting crucible 6 to be tilted and tilted, ensuring the stability and uniformity of the casting process. The melting crucible 6 is an open-top container for melting and refining high-temperature alloy return material. It has a diameter of 360 mm at the top, a diameter of 260 mm at the bottom, and a depth of 120 mm. A pouring spout 12 is located on the side near the casting and solidification crucible 13 to guide the alloy melt and ensure its precise casting into the casting and solidification crucible 13.

[0043] The feeding device 5 feeds from the middle of the furnace body 16 and above the smelting crucible 6, on which the cast high-temperature alloy fine return material 4 is placed. The feeding device 5 is connected to the furnace body 16 through a closed chamber. The chamber door is opened when feeding is needed, and the material is conveyed by a crawler belt.

[0044] The casting and solidification crucible 13 is located at the bottom and right side of the furnace body 16. Its top is open, and the top opening is located directly below the pouring spout 12 of the melting crucible 6. The casting and solidification crucible 13 uses a pneumatic fixed-track split copper mold with a diameter of 100 mm and a height of 500 mm. This allows the casting and solidification crucible 13 to be moved and disassembled, allowing for the removal of large quantities of return material ingots after casting.

[0045] The furnace body 16 is further provided with a cooling system 8, which in this embodiment is a water cooler.

[0046] A transparent observation window 9 is provided on the top of the furnace body 16 .

[0047] Example 1:

[0048] This example uses a high-quality return material of a hafnium-containing high-temperature alloy as the object of this example. During the investment casting process, the hafnium-containing high-temperature alloy is prone to interfacial reactions with the crucible, shell, and core, generating refractory inclusions such as HfO2. This can lead to casting defects in the alloy blade during production, resulting in the blade being scrapped. Specifically, the following steps are included:

[0049] The first step is to sort the high-temperature alloy blade production line's processing and quality inspection departments, collecting the high-quality return material 4, primarily consisting of runners, risers, sprues, and selectors. Next, nickel shot peening is performed to remove any large ceramic shells adhering to the outer surfaces of these high-temperature alloy return materials. The shot peening process uses compressed air, with a pressure of 0.7 MPa, a nickel shot size of 0.5 mm, and a peening time of 10 minutes. Finally, the shot peened high-temperature alloy return material 4 is air-dried to remove dust, oil, and moisture from the return material's surface.

[0050] In the second step, first, clean the crucible wall, chamber and observation window attachments, use a vacuum cleaner to remove scattered and adhered pollutants, and close the furnace door after confirming that the electron beam melting furnace body 16 is clean; then, use the mechanical pump 3 and the molecular pump 1 to pump the vacuum degree inside the electron gun 10 to 2×10 ~3 Pa, use the mechanical pump 3 and the Rhodes pump 15 to pump the vacuum degree inside the furnace body 16 to 40Pa, and use the diffusion pump to pump the vacuum degree inside the furnace body 16 to 3×10 ~3 Pa; finally, after reaching the target vacuum degree, the electron gun 10 is started and preheated for 20 minutes. After the preheating is completed, the return material melting stage is entered.

[0051] In the third step, first, the feeding device 5 is used to slowly and horizontally push the cast high-temperature alloy fine return materials 4 of different shapes and sizes into the melting crucible 6; secondly, the melting power of the electron gun 10 is slowly adjusted to 14kW, and the electron beam 11 acts on the surface of the return material in the melting crucible 6 to slowly melt it. The scanning frequency of the electron beam 11 is set to 20Hz, and the scanning mode is surface scanning. The cast high-temperature alloy fine return material is fully melted for 60 minutes; then, after the cast high-temperature alloy fine return material is fully melted, the electron beam 11 refining power is adjusted to 30kW to promote the sinking of large specific gravity inclusion particles into the melting crucible, and the small-sized inclusion content floats to the surface of the melting crucible 6 and is bombarded and decomposed by the electron beam spot; finally, after 30 minutes of electron beam 11 refining, the hydraulic turning device 7 of the melting crucible 6 is started, and the alloy melt is poured into the casting and solidification crucible 13, and slowly cooled under the action of the cooling system 8.

[0052] In the fourth step, first, continue to feed the material into the melting crucible 6 through the feeding device 5, repeat the third step until the casting and solidification crucible 13 is full, turn off the electron gun 10, continue to keep the alloy ingot cooling in a vacuum environment for 3 hours, release the vacuum of the furnace body, open the furnace door and take out the ultra-pure return material alloy ingot; secondly, use a wire cutting machine to take samples at the top and bottom of the ingot for composition detection, oxygen, nitrogen and sulfur impurity content detection, and inclusion content and size distribution detection. The test results show that the composition of the ultra-pure and highly homogeneous cast high-temperature alloy return material ingot is within the standard range, and the O, N, and S impurity contents are 1.8ppmw, 1.2ppmw and 4.9ppmw, respectively, which is equivalent to removing 78% of O, 80% of N and 38% of S from the return material. The inclusion content is 0.307mg / kg, and the number of refractory oxides such as HfO2 and Ta2O5 per unit area is significantly reduced, and the removal rate is more than 95% compared with the return material. Finally, the high-quality hafnium-containing high-temperature alloy return material ingots undergo machining, with the skin removed using a lathe to ensure a smooth surface. After processing, each bar is marked with a brand and number, and the return material is sorted and stored in piles according to type and brand, and promptly returned to the warehouse.

[0053] The above-described embodiments merely express the implementation methods of the present invention, but should not be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An electron beam refining continuous casting recovery device for casting high-temperature alloy fine return materials, characterized in that: The electron beam refining continuous casting recovery device comprises a furnace body (16), a melting crucible (6), a hydraulic turning device (7), and a casting and solidification crucible (13) located inside the furnace body (16), a molecular pump (1), a mechanical pump (3), a diffusion pump (14), and a Rhodes pump (15) located outside the furnace body (16), and a feeding device (5), a cooling system (8), and an electron gun (10) that are in communication with the inside and outside of the furnace body (16); There are two mechanical pumps (3), the first mechanical pump (3) is connected to the electron gun (10) through the molecular pump (1), wherein valves (2) are respectively provided on the connection paths between the first mechanical pump (3) and the molecular pump (1), and between the molecular pump (1) and the electron gun (10), for controlling the vacuum pumping process; the second mechanical pump (3) is connected to one end of the Rhodes pump (15), the other end of the Rhodes pump (15) is divided into two branches, one branch is connected to the furnace body (16) through the valve (2), and the other branch is connected to the diffusion pump (14) through the valve (2); the diffusion pump (14) is also connected to the furnace body (16) through the valve (2); The electron gun (10) is located at the top of the furnace body (16) and penetrates into the furnace body (16) to emit an electron beam (11). The electron beam (11) is used to melt and refine the high-temperature alloy casting fine return material; The smelting crucible (6) is located in the lower middle part of the furnace body (16) and on the left side, and a hydraulic turning device (7) is provided on its bottom surface, and the turning and dumping function of the smelting crucible (6) is realized by the hydraulic turning device (7); the smelting crucible (6) is a top-opening container for melting and refining the return material of the casting high-temperature alloy, and a pouring nozzle (12) is provided on the side close to the casting and solidification crucible (13) for draining the alloy melt so that it can be accurately cast into the casting and solidification crucible (13); The feeding device (5) feeds materials from the middle of the furnace body (16) and above the smelting crucible (6), on which the high-temperature alloy fine product return material (4) is placed; The casting and solidification crucible (13) is located at the bottom and right side of the furnace body (16), and its top is open. The top opening is located directly below the pouring spout (12) of the melting crucible (6). The alloy melt in the melting crucible (6) is cast into the casting and solidification crucible (13) through the hydraulic turning device (7).

2. The electron beam refining continuous casting recovery device for high-temperature alloy fine product return material according to claim 1 is characterized in that: The electron gun (10) has a maximum melting power of 300kW, a rated voltage of 30kV, a beam current range of 0-1000mA, and a beam spot diameter of 5-10mm.

3. The electron beam refining continuous casting recovery device for high-temperature alloy fine product return material according to claim 1, characterized in that: The smelting crucible (6) is made of pure copper and is a top-opening container for melting and refining cast high-temperature alloy return materials.

4. The electron beam refining continuous casting recovery device for high-temperature alloy fine product return material according to claim 1, characterized in that: The casting and solidification crucible (13) adopts a pneumatic fixed-track separation copper mold with a diameter of 80-200 mm and a height of 300 mm-800 mm, thereby realizing the movable and disassembly function of the casting and solidification crucible (13).

5. The electron beam refining continuous casting recovery device for high-temperature alloy fine product return materials according to claim 1 is characterized in that: The feeding device (5) is connected to the furnace body (16) through a sealed chamber; a cooling system (8) is also provided on the furnace body (16); and a transparent observation window (9) is provided on the top of the furnace body (16).

6. A method for recycling high-temperature alloy high-quality return materials by electron beam refining and continuous casting, characterized in that: The electron beam refining continuous casting recovery device according to any one of claims 1 to 5 is implemented, specifically comprising the following steps: The first step is to perform shot peening on the high temperature alloy casting fine product return material (4); In the second step, the interior of the furnace body (16) is evacuated, and after reaching the target vacuum degree, the electron gun (10) is started for preheating, and after the preheating is completed, the return material melting stage is entered; The third step is to process the high-temperature alloy casting fine product return material (4) by electron beam (11) to achieve melting; Step 3.1, using a feeding device (5) to horizontally push the high-temperature alloy casting fine return material (4) of different shapes and sizes into the melting crucible (6); Step 3.2, adjusting the melting power of the electron gun (10), the electron beam (11) acts on the surface of the return material in the melting crucible (6) to melt it, and the high-temperature alloy fine return material (4) is melted by the electron beam (11); Step 3.3, after the high-temperature alloy fine product return material (4) is fully melted, the refining power of the electron beam (11) is adjusted, and after refining, the hydraulic turning device (7) of the melting crucible (6) is started to pour the alloy melt into the casting and solidification crucible (13), and slowly cool it under the action of the cooling system (8); Step 4: Continue to collect the returned alloy ingots; Step 4.1, continue feeding the material into the melting crucible (6) through the feeding device (5), repeat the third step until the casting and solidification crucible (13) is full, turn off the electron gun (10), continue to keep the alloy ingot in the vacuum environment to cool for 2-5 hours, release the vacuum of the furnace body (16), open the furnace door and take out the ultra-pure return material alloy ingot; Step 4.2: The returned alloy ingots are tested, and the returned ingots that meet the factory standards are processed to ensure that the surface of the returned ingots is smooth.

7. The electron beam refining and continuous casting recovery method for high-temperature alloy fine product return materials according to claim 6 is characterized in that: In the first step, nickel balls are used to perform shot peening on the high-temperature alloy fine return material (4). The shot peening process uses compressed air as the power, the shot peening pressure is 0.2-0.7 MPa, the nickel ball particle size is 0.1-0.5 mm, and the shot peening time is 1 min-60 min.

8. The electron beam refining and continuous casting recovery method for high-temperature alloy fine product return materials according to claim 6, characterized in that: In the second step, the vacuuming process is as follows: first, the mechanical pump (3) and the molecular pump (1) are used to pump the vacuum degree inside the electron gun (10) to 5×10 ~3 Pa, then use the mechanical pump (3) and the Rhodes pump (15) to pump the vacuum degree inside the furnace body (16) to above 50Pa, and finally use the diffusion pump (14) to pump the vacuum degree inside the furnace body (16) to 5×10 ~3 Pa or above to reach the target vacuum degree; the preheating time is 10 to 20 minutes.

9. The electron beam refining and continuous casting recovery method for high-temperature alloy fine product return materials according to claim 6, characterized in that: In the third step: In the step 3.2, the melting power of the electron gun (10) is 4-14 kW, and the melting time is 30-90 min; the scanning frequency of the electron beam (11) is 20-40 Hz, and the scanning mode is surface scanning; In the step 3.3, the refining power of the electron beam (11) is 30-50 kW, and the refining time is 30-60 min.

10. The electron beam refining and continuous casting recovery method for high-temperature alloy fine product return materials according to claim 6, characterized in that: In step 4.2, the detection method is to determine whether the returned material ingot meets the standard composition and whether the purity reaches or exceeds the level of new material: if it passes the test, the subsequent machining procedure is carried out; if there are still casting defects or it does not meet the factory standards, the third step is continued and the composition of the cast high-temperature alloy ingot is adjusted.

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