Preparation method and device of homogenized large-size complex-structure polycrystalline cast blade, electronic equipment and storage medium

Abstract

The invention belongs to the technical field of material preparation processes, and provides a preparation method and device for a homogenized large-size complex-structure polycrystalline cast blade, electronic equipment and a storage medium, and the method comprises the steps of vacuumizing, metal melting, metal pouring, electromagnetic force generation and molten metal driving; the electromagnetic force is applied to the riser or the main body mold shell to repeatedly stir the melt, so that the overall temperature field of the melt is uniform, the growth speed of crystal grains and dendritic crystals is greatly reduced, the crystal grains are refined, and the defects of shrinkage porosity, shrinkage cavity, insufficient pouring, cold shut and the like are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of material preparation technology, and in particular to a method, device, electronic equipment and storage medium for preparing a homogenized large-size complex-structure polycrystalline casting blade. Background Art

[0002] Gas turbines are used for power generation on land, various offshore vessels, and oil and gas transportation. They represent the third-generation power machinery with the greatest market potential in the 21st century. With the widespread use of natural gas resources, the capacity and efficiency of gas turbines have increased significantly, enabling unprecedented rapid development in the power generation sector. Compared to aircraft engine blades, the polycrystalline blades used in gas turbine combustion chambers are heavier, larger, and longer. In heavy-duty engines, these blades can reach nearly one meter in length and weigh over 100 kilograms. This increased efficiency also complicates the blade structure, manifesting in a larger aspect ratio, a wider range of wall thickness variations, and multiple variable cross-sections and bosses.

[0003] During the casting process, it is very easy to deform and produce defects such as shrinkage, shrinkage cavities, coarse grains, insufficient pouring, cold shut, and sand holes. It is difficult to form, the product qualification rate is extremely low, and its service performance is significantly reduced. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the purpose of the present invention is to provide a method, device, electronic equipment and storage medium for preparing homogenized large-size complex structure polycrystalline casting blades, so as to solve the problems of easy deformation and shrinkage, shrinkage holes, coarse grains, insufficient pouring, cold shut and sand hole defects during the casting process.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A method for preparing a homogenized large-scale complex-structure polycrystalline casting blade comprises:

[0007] Use the vacuum unit to reduce the pressure inside the furnace to below 0.1 Pa;

[0008] The medium frequency induction heating unit in the furnace body is used to heat the metal to be melted in the crucible to obtain melted and refined metal liquid;

[0009] When the molten metal reaches the pouring temperature, the molten metal is poured into the riser and the main mold shell;

[0010] Starting a first rotating magnetic field corresponding to the riser or a second rotating magnetic field corresponding to a thicker edge portion of the main body mold shell to generate a stirring oscillation electromagnetic force;

[0011] The stirring and oscillating electromagnetic force is used to drive the molten metal in the riser or the main mold shell to continuously flow and flush out the grains and dendrites generated during the cooling process to obtain a blade casting.

[0012] Preferably, when the molten metal reaches the pouring temperature, the molten metal is poured into the riser and the main mold shell, comprising:

[0013] Setting the pouring temperature; the pouring temperature range is 150° C. to 250° C. higher than the melting point of the metal to be molten;

[0014] Heating the main body mold shell made of ceramic material to a preheating temperature; the preheating temperature ranges from 500° C. to 1500° C.;

[0015] starting the first rotating magnetic field or the second rotating magnetic field;

[0016] The molten metal reaching the pouring temperature is poured into the preheated riser and the main mold shell.

[0017] Preferably, starting the first rotating magnetic field corresponding to the riser or the second rotating magnetic field corresponding to the thicker edge portion of the main body mold shell to obtain the stirring oscillation electromagnetic force includes:

[0018] Setting the magnetic field frequency; the magnetic field frequency range is 1 Hz to 100 Hz;

[0019] Setting the working mode; the working mode includes: any one of continuous rotation, intermittent rotation, and periodic reverse rotation;

[0020] Setting the magnetic flux density at the center of the magnetic field; the magnetic flux density at the center of the magnetic field ranges from 0.05T to 1T;

[0021] The stirring oscillation electromagnetic force is obtained by applying a magnetic field to the riser or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field.

[0022] Preferably, applying a magnetic field to the riser or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes:

[0023] The six magnetic poles are arranged in the order of opposite magnetic properties to form a three-phase rotating magnetic field generator.

[0024] The three-phase rotating magnetic field generator is respectively arranged at the riser and the thickest part of the edge plate to obtain the first rotating magnetic field and the second rotating magnetic field;

[0025] generating rotating magnetic lines of force using the first rotating magnetic field or the second rotating magnetic field to obtain the stirring oscillation electromagnetic force;

[0026] The stirring and oscillating electromagnetic force is used to drive the melt in the riser and the thicker portion of the edge plate to perform rotational motion.

[0027] Preferably, applying a magnetic field to the riser or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes:

[0028] Arrange several magnetic poles in a row in the order of opposite magnetic properties to obtain a single-row magnetic field generator;

[0029] The single-row magnetic field generators are respectively arranged at the riser and the thickest part of the edge plate to obtain the first rotating magnetic field and the second rotating magnetic field;

[0030] Utilizing the first rotating magnetic field or the second rotating magnetic field to generate unilateral traveling wave magnetic lines of force to obtain the stirring oscillation electromagnetic force;

[0031] The stirring and oscillating electromagnetic force is utilized to drive the side wall melt and the center melt of the main mold shell to flow in opposite directions in a vertical direction.

[0032] Preferably, applying a magnetic field to the riser or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes:

[0033] Arranging a plurality of magnetic poles in a row in an order of opposite magnetic properties to obtain a single-sided magnetic field generator, and combining two of the single-sided magnetic field generators to obtain a second magnetic field generator;

[0034] The second magnetic field generator is respectively arranged at the riser and the thickest part of the edge plate to obtain the first rotating magnetic field and the second rotating magnetic field;

[0035] generating bilateral magnetic lines of force using the first rotating magnetic field or the second rotating magnetic field to obtain the stirring oscillation electromagnetic force;

[0036] The stirring and oscillating electromagnetic force is utilized to drive the side wall melt and the center melt of the main mold shell to flow in opposite directions in a vertical direction.

[0037] Preferably, applying a magnetic field to the riser or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes:

[0038] Arrange a plurality of magnetic poles in a row in an order of opposite magnetic properties to obtain an inner layer unilateral magnetic field generator, and relatively combine two of the inner layer unilateral magnetic field generators to obtain an inner layer dual magnetic field generator;

[0039] Select two magnetic poles with opposite magnetic properties to form an outer magnetic field generator;

[0040] Nesting the inner double magnetic field generator inside the outer magnetic field generator to obtain a composite magnetic field generator;

[0041] The composite magnetic field generator is respectively arranged at the riser and the thickest part of the edge plate to obtain the first rotating magnetic field and the second rotating magnetic field;

[0042] utilizing the first rotating magnetic field or the second rotating magnetic field to generate spiral magnetic lines of force to obtain the stirring oscillation electromagnetic force;

[0043] The stirring and oscillating electromagnetic force is used to drive the side wall melt and the center melt of the main mold shell to flow in a spiral manner.

[0044] Preferably, an electronic device comprises: at least one processor, and a memory communicatively connected to the processor; wherein the memory stores instructions that can be executed by the processor, and the instructions are executed by the processor so that the processor can execute the aforementioned method for preparing a homogenized large-size complex structure polycrystalline casting blade.

[0045] Preferably, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable a computer to execute the aforementioned method for preparing a homogenized large-size complex-structure polycrystalline casting blade.

[0046] The present invention discloses the following technical effects:

[0047] The present invention provides a method, device, electronic equipment and storage medium for preparing homogenized large-sized complex-structure polycrystalline casting blades. By applying electromagnetic force at the riser or main mold shell to repeatedly stir the melt, the problem of easy deformation during the casting process, resulting in shrinkage, shrinkage cavities, coarse grains, insufficient pouring, cold shut and sand holes, is solved, and the production of fully fine-grained and low-defect structures is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 A schematic diagram of the process for preparing a homogenized, large-scale, complex-structured polycrystalline casting blade according to an embodiment of the present invention;

[0050] Figure 2 A schematic structural diagram of a vacuum investment casting device provided in an embodiment of the present invention;

[0051] Figure 3 Schematic diagram of the rotating magnetic field and stirring melt flow mechanism provided by an embodiment of the present invention;

[0052] Figure 4 Schematic diagram of the unilateral traveling wave magnetic field and the stirring melt flow mechanism provided by an embodiment of the present invention;

[0053] Figure 5 Schematic diagram of the double-sided traveling wave magnetic field and stirring melt flow mechanism provided by an embodiment of the present invention;

[0054] Figure 6 Schematic diagram of the spiral magnetic field and stirring melt flow mechanism provided by an embodiment of the present invention.

[0055] Description of reference numerals:

[0056] 1-crucible, 2-furnace body, 3-molten metal, 4-riser, 5-first rotating magnetic field, 6-main mold shell, 7-second rotating magnetic field, 8-chassis mold shell, 9-medium frequency induction heating unit, 10-vacuum unit. DETAILED DESCRIPTION

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0058] The purpose of the present invention is to provide a method, device, electronic equipment and storage medium for preparing homogenized large-sized complex-structure polycrystalline casting blades, so as to solve the problems of easy deformation and shrinkage, shrinkage cavities, coarse grains, insufficient pouring, cold shut and sand hole defects during the casting process.

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Figure 1 The schematic diagram of the preparation process of the homogenized large-scale complex structure polycrystalline casting blade provided by the embodiment of the present invention is as follows: Figure 1 As shown, the present invention provides a method for preparing a homogenized large-scale complex structure polycrystalline casting blade, comprising:

[0061] Step 100: Using the vacuum unit 10 to reduce the pressure in the furnace body 2 to below 0.1 Pa;

[0062] Step 200: using the medium frequency induction heating unit 9 in the furnace body 2 to heat the metal to be melted in the crucible 1 to obtain melted and refined metal liquid 3;

[0063] Step 300: When the molten metal 3 reaches the pouring temperature, the molten metal 3 is poured into the riser 4 and the main mold shell 6;

[0064] Step 400: Start the first rotating magnetic field 5 corresponding to the riser 4 or the second rotating magnetic field 7 corresponding to the thicker edge portion of the main body mold 6 to generate a stirring oscillation electromagnetic force;

[0065] Step 500: Utilize the stirring oscillation electromagnetic force to drive the molten metal 3 in the riser 4 or the main mold shell 6 to continuously flow and flush out the grains and dendrites generated during the cooling process to obtain a blade casting.

[0066] Specifically, when the molten metal 3 reaches the pouring temperature, the molten metal 3 is poured into the riser 4 and the main mold shell 6, including:

[0067] Setting the pouring temperature; the pouring temperature range is 150° C. to 250° C. higher than the melting point of the metal to be molten;

[0068] The main body mold shell 6 made of ceramic material is heated to a preheating temperature; the preheating temperature ranges from 500° C. to 1500° C.;

[0069] Starting the first rotating magnetic field 5 or the second rotating magnetic field 7;

[0070] The molten metal 3 that has reached the pouring temperature is poured into the preheated riser 4 and the main mold shell 6 .

[0071] Preferably, starting the first rotating magnetic field 5 corresponding to the riser 4 or the second rotating magnetic field 7 corresponding to the thicker edge portion of the main body mold shell 6 to obtain the stirring oscillation electromagnetic force includes:

[0072] Setting the magnetic field frequency; the magnetic field frequency range is 1 Hz to 100 Hz;

[0073] Setting the working mode; the working mode includes: any one of continuous rotation, intermittent rotation, and periodic reverse rotation;

[0074] Setting the magnetic flux density at the center of the magnetic field; the magnetic flux density at the center of the magnetic field ranges from 0.05T to 1T;

[0075] A magnetic field is applied to the riser 4 or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force.

[0076] Specifically, applying a magnetic field to the riser 4 or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity of the magnetic field center to obtain the stirring oscillation electromagnetic force includes:

[0077] The six magnetic poles are arranged in the order of opposite magnetic properties to form a three-phase rotating magnetic field generator.

[0078] The three-phase rotating magnetic field generator is respectively arranged at the riser 4 and the thickest part of the edge plate to obtain the first rotating magnetic field 5 and the second rotating magnetic field 7;

[0079] Utilizing the first rotating magnetic field 5 or the second rotating magnetic field 7 to generate rotating magnetic lines of force, thereby obtaining the stirring oscillation electromagnetic force;

[0080] The stirring and oscillating electromagnetic force is used to drive the riser 4 and the melt in the thicker portion of the edge plate to perform rotational motion.

[0081] Furthermore, applying a magnetic field to the riser 4 or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes:

[0082] Arrange several magnetic poles in a row in the order of opposite magnetic properties to obtain a single-row magnetic field generator;

[0083] The single-row magnetic field generators are respectively arranged at the riser 4 and the thickest part of the edge plate to obtain the first rotating magnetic field 5 and the second rotating magnetic field 7;

[0084] Utilizing the first rotating magnetic field 5 or the second rotating magnetic field 7 to generate unilateral traveling wave magnetic lines of force, thereby obtaining the stirring oscillation electromagnetic force;

[0085] The stirring and oscillating electromagnetic force is used to drive the side wall melt and the center melt of the main mold shell 6 to flow in opposite directions in a vertical direction.

[0086] Specifically, applying a magnetic field to the riser 4 or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity of the magnetic field center to obtain the stirring oscillation electromagnetic force includes:

[0087] Arranging a plurality of magnetic poles in a row in an order of opposite magnetic properties to obtain a single-sided magnetic field generator, and combining two of the single-sided magnetic field generators to obtain a second magnetic field generator;

[0088] The second magnetic field generator is respectively arranged at the riser 4 and the thickest part of the edge plate to obtain the first rotating magnetic field 5 and the second rotating magnetic field 7;

[0089] Utilizing the first rotating magnetic field 5 or the second rotating magnetic field 7 to generate bilateral magnetic lines of force, thereby obtaining the stirring oscillation electromagnetic force;

[0090] The stirring and oscillating electromagnetic force is used to drive the side wall melt and the center melt of the main mold shell 6 to flow in opposite directions in a vertical direction.

[0091] Furthermore, applying a magnetic field to the riser 4 or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes:

[0092] Arrange a plurality of magnetic poles in a row in an order of opposite magnetic properties to obtain an inner layer unilateral magnetic field generator, and relatively combine two of the inner layer unilateral magnetic field generators to obtain an inner layer dual magnetic field generator;

[0093] Select two magnetic poles with opposite magnetic properties to form an outer magnetic field generator;

[0094] Nesting the inner double magnetic field generator inside the outer magnetic field generator to obtain a composite magnetic field generator;

[0095] The composite magnetic field generator is respectively arranged at the riser 4 and the thickest part of the edge plate to obtain the first rotating magnetic field 5 and the second rotating magnetic field 7;

[0096] Utilizing the first rotating magnetic field 5 or the second rotating magnetic field 7 to generate spiral magnetic lines of force, thereby obtaining the stirring oscillation electromagnetic force;

[0097] The stirring and oscillating electromagnetic force is used to drive the side wall melt and the center melt of the main mold shell 6 to flow in a spiral manner.

[0098] Preferably, an electronic device comprises: at least one processor, and a memory communicatively connected to the processor; wherein the memory stores instructions that can be executed by the processor, and the instructions are executed by the processor so that the processor can execute the aforementioned method for preparing a homogenized large-size complex structure polycrystalline casting blade.

[0099] Optionally, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable a computer to execute the aforementioned method for preparing a homogenized large-size complex structure polycrystalline casting blade.

[0100] Specifically, after pouring is completed in the vacuum cavity, when the melt begins to solidify, a rotating magnetic field, a traveling wave magnetic field or a spiral magnetic field is applied to the insulation riser 4 or the edge plate, the blade root, the thick part, and the mutation point. The magnetic lines of force generated by the static magnetic field enter the melt, and the periodically changing magnetic field induces a periodically changing current in the metal liquid 3. The induced current and the magnetic field produce a periodically changing Lorentz force, which stirs the melt. The melt moves continuously in the entire main mold shell 6, uniformizing the temperature field and concentration field, increasing the number of nucleation particles, forming crystal rain or a large number of fine crystals at the riser 4, etc., and the growth rate of the crystal nucleus is reduced. The electromagnetic force also causes a scouring effect on the growing grains / dendrites, further refining the grains.

[0101] Furthermore, the rotating magnetic field is applied at a frequency of 1Hz to 100Hz, operating in continuous, intermittent, or periodic reverse rotation modes. The central magnetic induction intensity of the rotating magnetic field is 0.05T to 1T, and a three-phase or two-phase rotating magnetic field is employed. This is suitable for the solidification molding process of large-sized polycrystalline solid or hollow blades, with ingot weights ranging from 0.3 to 300kg.

[0102] Preferably, the rotating magnetic field parameters, pouring temperature, preheating temperature of the main mold shell 6, and thickness of the main mold shell 6 are properly configured. This embodiment is applicable to the polycrystalline casting of nickel-based, cobalt-based, and iron-based high-temperature alloys, and is also suitable for the polycrystalline casting of blades made of metal materials such as Ti, TiAl, and NbSi. The main mold shell 6 can be made of materials including Al2O3, SiO2, or other ceramic materials. This embodiment is suitable for the equiaxed / polycrystalline solidification process of large blades with various complex structures.

[0103] Optionally, various filling methods of the investment casting molten metal 3 include top pouring, side pouring, low pouring, etc.

[0104] refer to Figure 2 , an applied rotating magnetic field (ref. Figure 3 ) An apparatus for vacuum investment casting of large blade castings includes a blade main mold 6, a riser 4, and a chassis mold 8. A vacuum unit 10 draws the vacuum in the furnace body 2 to below 0.1 Pa, and a medium-frequency induction heating unit 9 is started to heat the metal in the crucible 1. After melting and refining, the molten metal 3 reaches the pouring temperature and is poured into the riser 4 and the main mold 6. A rotating magnetic field is started and placed near the riser 4 or at a thicker portion of the edge plate. The magnetic lines of force generated by the rotating magnetic field enter the melt in the middle, and a periodically changing induced current is generated therein. The induced current and the magnetic field interact to generate an oscillating Lorentz force, which drives the melt to flow and stir the melt. The melt continuously moves within the entire main mold 6, homogenizing the temperature field and concentration field, increasing the number of nucleation points, forming a crystal rain or a large number of fine crystals at the riser 4 and other places, and reducing the growth rate of the crystal nuclei. The electromagnetic force also has a scouring effect on the growing grains / dendrites. These effects work together to achieve the purpose of refining the grains, homogenizing the structure and phase, and reducing casting defects. Figures 3 to 6 In the diagram, F represents the direction of the driving force; B represents the magnetic flux; V represents the electric potential; the S pole is the south pole of the magnetic field; and the N pole is the north pole of the magnetic field.

[0105] Preferably, the rotating magnetic field generator uses a water-cooled coil to generate a magnetic field, which is applied to the riser 4 area or the thickest part of the blade. The frequency of the rotating magnetic field is 1Hz to 100Hz, and it works in a continuous / intermittent / periodic reverse rotation mode. The central magnetic induction intensity of the rotating magnetic field is 0.05T to 1T. A three-phase rotating magnetic field is used. The pouring temperature is controlled at 150°C to 250°C higher than the melting point of the smelted alloy. The main mold shell 6 is made of ceramic material, and the preheating temperature of the main mold shell 6 is controlled at 500°C to 1500°C. The magnetic field generator is started before pouring begins, and the rotating magnetic field is continuously applied from the start of melt filling until solidification is completed.

[0106] Preferably, the magnetic field generator structure is as follows Figure 4 and Figure 5 , generating unilateral traveling magnetic lines and bilateral magnetic lines, the melt in the agitator space moves linearly in one direction at a certain speed, driving the melt on the 6 walls of the main mold shell to flow upward (or downward) and the central melt to flow linearly downward (or upward), achieving the purpose of stirring the melt, homogenizing the temperature field / solute field, increasing the crystallization core, refining the grains, and reducing defects.

[0107] Furthermore, in this embodiment, a spiral magnetic field generator is applied, which is composed of a rotating magnetic field and a traveling wave magnetic field superimposed together. The structure is shown in FIG. Figure 6 The melt in the magnetic field generator can not only move horizontally, but also move linearly, making the melt stirring more uniform, playing a better role in homogenizing the large and complex structure blade organization, and greatly reducing its casting defects.

[0108] The beneficial effects of the present invention are as follows:

[0109] (1) The present invention applies a rotating magnetic field to the die casting riser or thick parts, starts the rotating magnetic field at the beginning of the investment casting or the end of the investment casting, and adjusts the working mode of the magnetic field. The frequency, lightness, application method and other parameters are adjusted according to different needs to obtain a good magnetic field treatment effect; the magnetic field of the present invention acts on the solidified metal melt in a non-contact manner, so no other impurities will be introduced, and pollution can be avoided.

[0110] (2) The process of the present invention can reduce defects such as shrinkage, shrinkage cavities, coarse grains, insufficient pouring, cold shut, and sand holes, and ultimately obtain large equiaxed blades with homogenized structure, fine grains and few defects, thereby improving the yield and reducing costs.

[0111] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0112] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A method for preparing homogenized large-scale complex-structure polycrystalline casting blades, characterized in that: include: Use the vacuum unit to reduce the pressure inside the furnace to below 0.1 Pa; The medium frequency induction heating unit in the furnace body is used to heat the metal to be melted in the crucible to obtain melted and refined metal liquid; When the molten metal reaches the pouring temperature, the molten metal is poured into the riser and the main mold shell; Starting a first rotating magnetic field corresponding to the riser or a second rotating magnetic field corresponding to a thicker edge portion of the main body mold shell to generate a stirring oscillation electromagnetic force; The stirring and oscillating electromagnetic force is used to drive the molten metal in the riser or the main mold shell to continuously flow and flush out the grains and dendrites generated during the cooling process to obtain a blade casting.

2. The method for preparing a homogenized large-scale complex structure polycrystalline casting blade according to claim 1, characterized in that: When the molten metal reaches the pouring temperature, the molten metal is poured into the riser and the main mold shell, including: Setting the pouring temperature; the pouring temperature range is 150° C. to 250° C. higher than the melting point of the metal to be molten; Heating the main body mold shell made of ceramic material to a preheating temperature; the preheating temperature ranges from 500° C. to 1500° C.; starting the first rotating magnetic field or the second rotating magnetic field; The molten metal reaching the pouring temperature is poured into the preheated riser and the main mold shell.

3. The method for preparing a homogenized large-scale complex structure polycrystalline casting blade according to claim 1, characterized in that: Starting the first rotating magnetic field corresponding to the riser or the second rotating magnetic field corresponding to the thicker edge portion of the main formwork to obtain a stirring oscillation electromagnetic force includes: Setting the magnetic field frequency; the magnetic field frequency range is 1 Hz to 100 Hz; Setting the working mode; the working mode includes: any one of continuous rotation, intermittent rotation, and periodic reverse rotation; Setting the magnetic flux density at the center of the magnetic field; the magnetic flux density at the center of the magnetic field ranges from 0.05T to 1T; The stirring oscillation electromagnetic force is obtained by applying a magnetic field to the riser or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field.

4. The method for preparing a homogenized large-scale complex structure polycrystalline casting blade according to claim 3, characterized in that: Applying a magnetic field to the riser or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes: The six magnetic poles are arranged in the order of opposite magnetic properties to form a three-phase rotating magnetic field generator. The three-phase rotating magnetic field generator is respectively arranged at the riser and the thickest part of the edge plate to obtain the first rotating magnetic field and the second rotating magnetic field; generating rotating magnetic lines of force using the first rotating magnetic field or the second rotating magnetic field to obtain the stirring oscillation electromagnetic force; The stirring and oscillating electromagnetic force is used to drive the melt in the riser and the thicker portion of the edge plate to perform rotational motion.

5. The method for preparing a homogenized large-scale complex structure polycrystalline casting blade according to claim 3, characterized in that: Applying a magnetic field to the riser or the thickest part of the edge plate according to the magnetic field frequency, the working mode and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes: Arrange several magnetic poles in a row in the order of opposite magnetic properties to obtain a single-row magnetic field generator; The single-row magnetic field generators are respectively arranged at the riser and the thickest part of the edge plate to obtain the first rotating magnetic field and the second rotating magnetic field; Utilizing the first rotating magnetic field or the second rotating magnetic field to generate unilateral traveling wave magnetic lines of force to obtain the stirring oscillation electromagnetic force; The stirring and oscillating electromagnetic force is used to drive the side wall melt and the center melt of the main mold shell to flow in opposite directions in a vertical direction.

6. The method for preparing a homogenized large-scale complex structure polycrystalline casting blade according to claim 3, characterized in that: Applying a magnetic field to the riser or the thickest portion of the edge plate according to the magnetic field frequency, the working mode, and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes: Arranging a plurality of magnetic poles in a row in an order of opposite magnetic properties to obtain a single-sided magnetic field generator, and combining two of the single-sided magnetic field generators to obtain a second magnetic field generator; The second magnetic field generator is respectively arranged at the riser and the thickest part of the edge plate to obtain the first rotating magnetic field and the second rotating magnetic field; generating bilateral magnetic lines of force using the first rotating magnetic field or the second rotating magnetic field to obtain the stirring oscillation electromagnetic force; The stirring and oscillating electromagnetic force is used to drive the side wall melt and the center melt of the main mold shell to flow in opposite directions in a vertical direction.

7. The method for preparing a homogenized large-scale complex structure polycrystalline casting blade according to claim 3, characterized in that: Applying a magnetic field to the riser or the thickest portion of the edge plate according to the magnetic field frequency, the working mode, and the magnetic induction intensity at the center of the magnetic field to obtain the stirring oscillation electromagnetic force includes: Arrange a plurality of magnetic poles in a row in an order of opposite magnetic properties to obtain an inner layer unilateral magnetic field generator, and relatively combine two of the inner layer unilateral magnetic field generators to obtain an inner layer dual magnetic field generator; Select two magnetic poles with opposite magnetic properties to form an outer magnetic field generator; Nesting the inner double magnetic field generator inside the outer magnetic field generator to obtain a composite magnetic field generator; The composite magnetic field generator is respectively arranged at the riser and the thickest part of the edge plate to obtain the first rotating magnetic field and the second rotating magnetic field; utilizing the first rotating magnetic field or the second rotating magnetic field to generate spiral magnetic lines of force to obtain the stirring oscillation electromagnetic force; The stirring and oscillating electromagnetic force is used to drive the side wall melt and the center melt of the main mold shell to flow in a spiral manner.

8. A homogenized large-scale complex structure polycrystalline casting blade preparation device, characterized in that: The method for preparing a homogenized large-sized complex-structure polycrystalline casting blade according to claim 1, wherein the device comprises: a crucible, a furnace body, a riser, a first rotating magnetic field, a main body mold shell, a second rotating magnetic field, a chassis mold shell, a medium-frequency induction heating unit, and a vacuum unit; The vacuum unit is connected to the outer wall of the furnace body; the medium frequency induction heating unit is connected to the crucible; the chassis mold is placed at the bottom of the furnace body; the main body mold is placed on the chassis mold; the main body mold is fixedly connected to the riser; the first rotating magnetic field is set at a position at the same level as the riser; the second rotating magnetic field is set at a position at the same level as the thickest part of the edge plate of the main body mold; the crucible is set on the oblique upper side of the riser.

9. An electronic device, characterized in that: include: At least one processor, and a memory communicatively connected to the processor; wherein the memory stores instructions that can be executed by the processor, and the instructions are executed by the processor so that the processor can execute a method for preparing a homogenized large-size complex structure polycrystalline casting blade according to any one of claims 1 to 8.

10. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to enable a computer to execute a method for preparing a homogenized large-size complex structure polycrystalline casting blade according to any one of claims 1 to 8.

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