Method and device for controlling the stirring intensity of a titanium alloy VAR melting

Abstract

The application discloses a method for controlling stirring intensity of VAR melting of a titanium alloy, and the method comprises the following steps: obtaining a desired stirring intensity range, and determining a desired molten pool rotation angle interval according to the desired stirring intensity range; collecting a molten pool ripple image of the titanium alloy in a molten pool of one-time melting; performing image recognition on the molten pool ripple image to obtain a target molten pool rotation angle; determining a target melting arc stabilization parameter based on the target molten pool rotation angle and the desired molten pool rotation angle interval; and adjusting a current melting arc stabilization parameter of a vacuum consumable arc furnace to the target melting arc stabilization parameter, so as to control the melting stirring intensity of the molten pool to be within the desired stirring intensity range. The method and the device for controlling the stirring intensity of the VAR melting of the titanium alloy can effectively improve the macroscopic uniformity of the ingot and remove impurities in raw materials, thereby improving the quality of the titanium alloy ingot and reducing the cost of obtaining reasonable melting parameters.

Description

Technical Field

[0001] This invention belongs to the field of titanium alloy material processing technology, and relates to a method for controlling the stirring intensity of VAR melting of titanium alloys, as well as a device for controlling the stirring intensity of VAR melting of titanium alloys. Background Technology

[0002] Titanium alloys possess characteristics such as low density, high specific strength, good corrosion resistance, and excellent heat resistance, leading to their increasing applications in aerospace, marine, and other fields. The production of high-quality titanium alloy ingots typically involves a series of processes including mixing, electrode pressing, and multiple melting stages. The primary purpose of the first melting stage is to improve the macroscopic uniformity of the ingot's composition and remove some impurities from the raw materials. During this first melting stage, appropriate stirring parameters can effectively promote molten metal flow and the flotation of impurity elements; therefore, the stirring intensity is crucial to the quality of the ingot.

[0003] Currently, the main approach to controlling stirring intensity relies on trying different stirring parameters and then performing dissection analysis. The stirring parameters are then adjusted based on the analysis results. This method involves long experimental cycles, high costs, and the possibility that the quality of the ingots may be low due to material differences and analytical errors. Summary of the Invention

[0004] The purpose of this invention is to provide a method for controlling the stirring intensity of VAR melting of titanium alloys, which can effectively improve the macroscopic uniformity of ingot composition and remove impurities in raw materials, thereby improving the quality of ingots, while shortening the debugging cycle of stirring intensity and reducing trial and error costs.

[0005] Another object of the present invention is to provide a device for controlling the stirring intensity of VAR melting of titanium alloys.

[0006] The technical solution adopted in this invention is a method for controlling the stirring intensity of VAR melting in titanium alloys, and the specific steps are as follows:

[0007] Step 1. Obtain the desired stirring strength range for VAR primary melting of titanium alloys;

[0008] Step 2. Determine the desired molten pool rotation angle range based on the desired stirring intensity range;

[0009] Step 3. Acquire images of the ripples on the surface of the molten pool during the first melting of titanium alloy in a vacuum arc furnace;

[0010] Step 4. Perform image recognition on the molten pool ripple image to obtain the target molten pool rotation angle;

[0011] Step 5. Determine the target molten pool rotation angle and the desired molten pool rotation angle range;

[0012] Step 6. Adjust the current melting and arc stabilization parameters of the vacuum arc furnace to the target melting and arc stabilization parameters in order to control the melting and stirring intensity of the molten pool within the desired stirring intensity range.

[0013] The invention is further characterized by:

[0014] Step 1 is as follows:

[0015] Step 1.1. Obtain the melting property parameters of the titanium alloy to be smelted and the inner diameter of the crucible corresponding to the vacuum consumable arc furnace; the melting property parameters shall include at least the depth of the molten pool, the density of the molten titanium alloy, and the viscosity of the molten titanium alloy during the smelting process.

[0016] Step 1.2. Determine the stirring power density of the molten pool based on the melting property parameters and the inner diameter of the crucible, and use the stirring power density of the molten pool as the desired stirring intensity range.

[0017] In step 1.2, the power density of the molten pool stirring is calculated as follows:

[0018] P = N p ρn 3 d 5

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025] Where ε is the stirring power density, in W / kg; P is the stirring power, in W; m is the weight of the molten pool during titanium alloy smelting, in kg; N p ρ is the power conversion coefficient; ρ is the density of the titanium alloy melt, in kg / m³. 3 n represents the stirring speed of the molten pool, in seconds (s). -1 ; d is the inner diameter of the crucible, in meters; R e α is the Reynolds number; Z is the depth of the molten pool in meters; μ is the viscosity of the titanium alloy melt in Pa·s; α and β are intermediate parameters.

[0026] Step 2 specifically involves: obtaining the pre-calculated conversion coefficient; and determining the desired molten pool rotation angle range based on the desired stirring intensity range from Step 1 and the conversion coefficient.

[0027] The formula for calculating the desired molten pool rotation angle range is:

[0028] θ=k×ε

[0029] Where θ represents the desired rotation angle range of the molten pool, i.e., the angle range between the molten pool ripples and the crucible chamfer, and k represents the conversion coefficient, which is a constant with a value range of 1×10. 5 ~4×10 5 .

[0030] In step 2, the desired rotation angle range of the molten pool is 30° to 50°.

[0031] Step 4 specifically involves: dividing the molten pool ripple image from Step 3 into multiple image blocks; filtering out image regions belonging to the molten pool ripple based on the image texture features in each image block; determining the angle between the molten pool ripple and the crucible chamfer based on the image regions belonging to the molten pool ripple, and using the angle between the molten pool ripple and the crucible chamfer as the target molten pool rotation angle.

[0032] Step 5 specifically involves: determining the difference data between the target molten pool rotation angle in Step 4 and the boundary value of the expected molten pool rotation angle range in Step 2; and determining the target smelting arc stabilization parameters based on the difference data.

[0033] In step 6, the target melting arc stabilization parameter is used as the melting arc stabilization parameter to control the melting stirring intensity of titanium alloys of the same type as the titanium alloy to be refined.

[0034] Another technical solution adopted in this invention is a device for controlling the stirring intensity of VAR melting of titanium alloys, comprising:

[0035] The desired stirring intensity acquisition module is used to obtain the desired stirring intensity range for melting the titanium alloy to be refined;

[0036] The desired molten pool rotation angle determination module is used to determine the desired molten pool rotation angle range based on the desired stirring intensity range.

[0037] The molten pool ripple image acquisition module is used to acquire images of the molten pool ripples on the surface of the molten pool when the titanium alloy to be refined is melted into a molten pool in a vacuum consumable arc furnace in one melting process.

[0038] The target molten pool rotation angle determination module is used to perform image recognition on the molten pool ripple image to obtain the target molten pool rotation angle.

[0039] The melting arc stabilization parameter determination module is used to determine the target melting arc stabilization parameters based on the target molten pool rotation angle and the desired molten pool rotation angle range.

[0040] The smelting stirring intensity adjustment module is used to adjust the current smelting arc stabilization parameters of the vacuum self-consuming electric arc furnace to the target smelting arc stabilization parameters, so as to control the smelting stirring intensity of the molten pool within the desired stirring intensity range.

[0041] The beneficial effects of this invention are:

[0042] The method for controlling the stirring intensity of VAR melting of titanium alloys of the present invention, on the one hand, determines the desired molten pool rotation angle range by the desired stirring intensity range, obtains the target molten pool rotation angle by observing the molten pool ripple image, and adjusts the stirring intensity by adjusting the molten pool rotation angle, which can effectively improve the macroscopic uniformity of the ingot composition and remove impurities in the raw materials, thereby improving the quality of the ingot; on the other hand, according to the determined target molten pool rotation angle, a suitable stirring parameter, i.e., the target melting arc stabilization parameter, can be found at once, without having to repeatedly try different stirring parameters and dissect and analyze the ingot, effectively shortening the debugging cycle of stirring intensity and reducing trial and error costs;

[0043] The present invention relates to a device for controlling the stirring intensity of VAR melting of titanium alloys. This device acquires the desired stirring intensity range for melting the titanium alloy to be refined, determines the desired molten pool rotation angle range based on the desired stirring intensity range, acquires images of the molten pool ripples on the surface of the molten pool when the titanium alloy to be refined is melted in a vacuum arc furnace, and obtains the target molten pool rotation angle by image recognition of the molten pool ripple images. Then, based on the target molten pool rotation angle and the desired molten pool rotation angle range, the target melting arc stabilization parameter is determined. Finally, the current melting arc stabilization parameter of the vacuum arc furnace is adjusted to the target melting arc stabilization parameter to control the melting stirring intensity of the molten pool within the desired stirring intensity range. Attached Figure Description

[0044] Figure 1 This is a schematic flowchart of the method for controlling the stirring intensity of VAR melting of titanium alloys according to the present invention.

[0045] Figure 2 This is a schematic diagram of the molten pool ripple image under the stirring intensity in the VAR melting and stirring intensity control method for titanium alloys of the present invention.

[0046] Figure 3 This is a schematic diagram of the molten pool ripple image under another molten pool stirring intensity in the VAR melting and stirring intensity control method for titanium alloys of the present invention.

[0047] Figure 4 This is a schematic diagram of the structure of the titanium alloy VAR melting and stirring intensity control device of the present invention;

[0048] Figure 5 This is a schematic diagram of the system structure of an electronic device used to implement the method for controlling the stirring intensity of VAR melting of titanium alloys according to the present invention;

[0049] Figure 6 This is a schematic diagram of a program product used to implement the method for controlling the stirring intensity of VAR melting of titanium alloys according to the present invention.

[0050] In the figure, 410. Module for obtaining desired stirring intensity, 420. Module for determining desired molten pool rotation angle, 430. Module for acquiring molten pool ripple image, 440. Module for determining target molten pool rotation angle, 450. Module for determining smelting arc stabilization parameters, and 460. Module for adjusting smelting stirring intensity;

[0051] 500. Electronic device; 510. Processing unit; 520. Storage unit; 521. Random access memory unit; 522. Cache memory unit; 523. Read-only memory unit; 524. Program tool; 525. Program module; 530. Bus; 540. Display unit; 550. Input / output interface; 560. Network adapter; 570. External device;

[0052] 600. Program products. Detailed Implementation

[0053] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0054] Example 1

[0055] The method for controlling the stirring intensity in VAR melting of titanium alloys according to the present invention is as follows: Figure 1 As shown, the specific steps include:

[0056] Step S110: Obtain the desired stirring intensity range for melting the titanium alloy to be refined;

[0057] The desired stirring intensity range refers to the range of stirring intensity obtained through calculation and analysis that results in a better macroscopic uniformity of the composition of the ingot obtained from a single melting of the titanium alloy to be refined, and fewer impurities in the raw materials.

[0058] The melting property parameters of the titanium alloy to be refined can be obtained. The melting parameters include at least the depth of the molten pool, the density of the molten titanium alloy, and the viscosity of the molten titanium alloy during melting. Then, the inner diameter of the crucible corresponding to the vacuum consumable arc furnace can be obtained. Based on the melting property parameters and the inner diameter of the crucible, the stirring power density of the molten pool can be determined, and the stirring power density of the molten pool can be used as the expected stirring intensity range.

[0059] Calculate the molten pool stirring power density using the following formula:

[0060] P = N p ρn 3 d 5 ;

[0061]

[0062]

[0063]

[0064]

[0065]

[0066]

[0067] Where ε is the stirring power density, in W / kg; P is the stirring power, in W; m is the weight of the molten pool during titanium alloy smelting, in kg; N p ρ is the power conversion coefficient; ρ is the density of the titanium alloy melt, in kg / m³. 3 n represents the stirring speed of the molten pool, in seconds (s). -1 ; d is the inner diameter of the crucible, in meters; R e α is the Reynolds number; Z is the depth of the molten pool in meters; μ is the viscosity of the titanium alloy melt in Pa·s; α and β are intermediate parameters.

[0068] Step S120: Determine the desired molten pool rotation angle range based on the desired stirring intensity range;

[0069] The desired molten pool rotation angle range refers to the range of angles between the molten pool ripples and the crucible chamfer when the stirring intensity of the molten pool is within the desired stirring intensity range. By observing the molten pool rotation angle, the stirring intensity of the molten pool can be quickly adjusted to the desired stirring intensity range.

[0070] The desired molten pool rotation angle range can be determined by obtaining the pre-calculated conversion coefficient and based on the desired stirring intensity range and the conversion coefficient. The conversion coefficient is a constant with a value range of 1 × 10⁻⁶. 5 ~4×10 5 .

[0071] The desired molten pool rotation angle range is calculated using the following formula:

[0072] θ=k×ε

[0073] Where θ represents the desired rotation angle range of the molten pool, i.e., the angle range between the molten pool ripples and the crucible chamfer, and k represents the conversion coefficient, which is a constant with a value range of 1×10. 5 ~4×10 5 .

[0074] The desired range of molten pool rotation angle is between 30° and 50°. Experiments have shown that for most types of titanium alloys, a molten pool rotation angle between 30° and 50° can effectively improve the macroscopic uniformity of the ingot composition and reduce impurities in the titanium alloy raw materials.

[0075] Step S130: Collect images of the ripples on the surface of the molten pool when the titanium alloy to be refined is melted in a vacuum arc furnace in one melting process.

[0076] Images of the molten pool surface during the single-stage melting of the titanium alloy to be refined in the vacuum arc furnace were captured by a high-speed camera positioned near the furnace. Figures 2 to 3 The image shown is an image of the molten pool ripples under different stirring intensities.

[0077] Step S140: Perform image recognition on the molten pool ripple image to obtain the target molten pool rotation angle;

[0078] The image of the molten pool ripple is divided into multiple image blocks. Based on the image texture features in each image block, the image regions belonging to the molten pool ripple are selected. Then, the angle between the molten pool ripple and the crucible chamfer can be determined according to the image regions belonging to the molten pool ripple. The angle between the molten pool ripple and the crucible chamfer is used as the target molten pool rotation angle.

[0079] Step S150: Determine the target smelting arc stabilization parameters based on the target molten pool rotation angle and the desired molten pool rotation angle range;

[0080] Specifically, this involves determining the difference between the target molten pool rotation angle and the boundary value of the desired molten pool rotation angle range; and then determining the target smelting arc stabilization parameters based on the difference data.

[0081] Step S160: Adjust the current melting and arc stabilization parameters of the vacuum self-consuming electric arc furnace to the target melting and arc stabilization parameters, so as to control the melting and stirring intensity of the molten pool within the desired stirring intensity range.

[0082] The technical principle of the method for controlling the stirring intensity of VAR melting of titanium alloys of the present invention is as follows: obtaining the desired stirring intensity range for melting the titanium alloy to be refined, and then determining the desired molten pool rotation angle range according to the desired stirring intensity range; acquiring the molten pool ripple image on the surface of the molten pool when the titanium alloy to be refined is melted into a molten pool in a vacuum arc furnace, and obtaining the target molten pool rotation angle by image recognition of the molten pool ripple image; then determining the target melting arc stabilization parameter based on the target molten pool rotation angle and the desired molten pool rotation angle range; finally adjusting the current melting arc stabilization parameter of the vacuum arc furnace to the target melting arc stabilization parameter to control the melting stirring intensity of the molten pool within the desired stirring intensity range.

[0083] The method for controlling the stirring intensity in VAR melting of titanium alloys of the present invention has the advantage of being applicable to both terminal devices and servers. On one hand, by pre-determining the desired stirring intensity range through experiments, the desired molten pool rotation angle range can be determined. Then, by observing the molten pool ripple image, the target molten pool rotation angle can be obtained, and the stirring intensity can be adjusted based on the molten pool rotation angle. This effectively improves the macroscopic uniformity of the ingot composition and removes impurities from the raw materials, thereby enhancing the quality of the ingot. On the other hand, since a suitable stirring parameter, i.e., the target smelting arc stabilization parameter, can be found in one go based on the determined target molten pool rotation angle, it is not necessary to repeatedly try different stirring parameters and dissect and analyze the ingot. This effectively shortens the debugging cycle of the stirring intensity and reduces trial-and-error costs.

[0084] Example 2

[0085] The device for controlling the stirring intensity of VAR melting of titanium alloys according to the present invention has the following structure: Figure 4 As shown, it includes a desired stirring intensity acquisition module 410, a desired molten pool rotation angle determination module 420, a molten pool ripple image acquisition module 430, a target molten pool rotation angle determination module 440, a melting arc stabilization parameter determination module 450, and a melting stirring intensity adjustment module 460. Wherein:

[0086] The desired stirring intensity acquisition module 410 is used to acquire the desired stirring intensity range for melting the titanium alloy to be refined;

[0087] The desired molten pool rotation angle determination module 420 is used to determine the desired molten pool rotation angle range based on the desired stirring intensity range; specifically, it obtains a pre-calculated conversion coefficient, which is a constant with a value range of 1×10. 5 ~4×10 5 The desired molten pool rotation angle range is determined based on the desired stirring intensity range and the conversion coefficient. The desired molten pool rotation angle is between 30° and 50°.

[0088] The molten pool ripple image acquisition module 430 is used to acquire images of the molten pool ripples on the surface of the molten pool when the titanium alloy to be refined is melted into a molten pool in a vacuum consumable arc furnace in one melting process.

[0089] The target molten pool rotation angle determination module 440 is used to perform image recognition on the molten pool ripple image to obtain the target molten pool rotation angle; specifically, the molten pool ripple image is divided into multiple image blocks, and the image regions belonging to the molten pool ripple are selected based on the image texture features in each image block. The angle between the molten pool ripple and the crucible chamfer is determined according to the image regions belonging to the molten pool ripple, and the angle between the molten pool ripple and the crucible chamfer is taken as the target molten pool rotation angle.

[0090] The smelting arc stabilization parameter determination module 450 is used to determine the target smelting arc stabilization parameters based on the target molten pool rotation angle and the desired molten pool rotation angle range; specifically, it determines the difference data between the boundary values ​​of the target molten pool rotation angle and the desired molten pool rotation angle range, and determines the target smelting arc stabilization parameters based on the difference data.

[0091] The smelting stirring intensity adjustment module 460 is used to adjust the current smelting arc stabilization parameters of the vacuum self-consuming electric arc furnace to the target smelting arc stabilization parameters, so as to control the smelting stirring intensity of the molten pool to be within the desired stirring intensity range.

[0092] The titanium alloy VAR melting stirring intensity control device 400 may further include a desired stirring intensity range determination module, which can be used for:

[0093] Obtain the melting property parameters of the titanium alloy to be refined. The melting property parameters include at least the depth of the molten pool, the density of the molten titanium alloy, the stirring speed of the molten pool, the depth of the molten pool, and the viscosity of the molten titanium alloy during the melting of the titanium alloy.

[0094] Obtain the inner diameter of the crucible corresponding to the vacuum consumable arc furnace;

[0095] The stirring power density of the molten pool is determined based on the smelting property parameters and the inner diameter of the crucible, and the stirring power density of the molten pool is used as the range of desired stirring intensity.

[0096] Example 3,

[0097] Based on Example 2, the module for determining the desired stirring intensity range can be used for:

[0098] The molten pool stirring power density is determined by the following relationship:

[0099] P = N p ρn 3 d 5

[0100]

[0101]

[0102]

[0103]

[0104]

[0105]

[0106] Where ε is the stirring power density, in W / kg; P is the stirring power, in W; m is the weight of the molten pool during titanium alloy smelting, in kg; N pρ is the power conversion coefficient; ρ is the density of the titanium alloy melt, in kg / m³. 3 n represents the stirring speed of the molten pool, in seconds (s). -1 ; d is the inner diameter of the crucible, in meters; R e α is the Reynolds number; Z is the depth of the molten pool in meters; μ is the viscosity of the titanium alloy melt in Pa·s; α and β are intermediate parameters.

[0107] The titanium alloy VAR melting stirring intensity control device 400 may further include a target melting arc stabilization parameter storage module, which can be used for:

[0108] The target melting arc stabilization parameter is used as the melting arc stabilization parameter to control the melting stirring intensity of titanium alloys of the same type as the titanium alloy to be refined.

[0109] Example 4

[0110] The method for controlling the stirring intensity during VAR melting of titanium alloys of the present invention can be applied to electronic devices 500, such as... Figure 5 As shown,

[0111] The electronic device 500 is manifested in the form of a general-purpose computing device. The components of the electronic device 500 may include, but are not limited to: at least one processing unit 510, at least one storage unit 520, a bus 530 connecting different system components such as storage unit 520 and processing unit 510, and display unit 540.

[0112] The storage unit 520 stores program code, which can be executed by the processing unit 510 to perform the steps of the titanium alloy VAR melting and stirring intensity control method of Embodiment 1 of the present invention. For example, the processing unit 510 can perform the following... Figure 1 The steps shown are as follows: Step S110: Obtain the desired stirring intensity range for melting the titanium alloy to be refined; Step S120: Determine the desired molten pool rotation angle range based on the desired stirring intensity range; Step S130: Acquire an image of the molten pool ripples on the surface of the molten pool when the titanium alloy to be refined is melted into a molten pool in a vacuum arc furnace; Step S140: Perform image recognition on the molten pool ripple image to obtain the target molten pool rotation angle; Step S150: Determine the target melting arc stabilization parameter based on the target molten pool rotation angle and the desired molten pool rotation angle range; Step S160: Adjust the current melting arc stabilization parameter of the vacuum arc furnace to the target melting arc stabilization parameter to control the melting stirring intensity of the molten pool within the desired stirring intensity range.

[0113] Storage unit 520 may include readable media in the form of volatile storage units, such as random access memory (RAM) 521 and / or cache memory 522, and may further include read-only memory (ROM) 523.

[0114] The storage unit 520 may also include a program tool 524 having at least one program module 525, the program module 525 including but not limited to: an operating system, one or more application programs, other program modules and program data, each or some combination of which may include an implementation of a network environment.

[0115] Bus 530 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0116] Electronic device 500 can also communicate with one or more external devices 570, such as keyboards, pointing devices, Bluetooth devices, etc., and with one or more devices that enable users to interact with the electronic device 500, and / or with any device that enables the electronic device 500 to communicate with one or more other computing devices, such as routers, modems, etc. This communication can be performed through input / output (I / O) interface 550. Furthermore, electronic device 500 can also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) through network adapter 560. Figure 5 As shown, network adapter 560 communicates with other modules of electronic device 500 via bus 530. Other hardware and / or software modules can be used in conjunction with electronic device 500, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0117] The method of Embodiment 1 can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution of Embodiment 1 of the present invention can be embodied in the form of a software product. This software product can be stored in a non-volatile storage medium (such as CD-ROM, USB flash drive, mobile hard drive, etc.) or on a network, and includes several instructions to cause a computing device to execute the method of Embodiment 1. The computing device can be a personal computer, server, terminal device, or network device, etc.

[0118] Example 5

[0119] A computer-readable storage medium storing a program product 600 capable of implementing the method of Embodiment 1 of the present invention, the program product 600 including program code, which, when the program product is run on a terminal device, causes the terminal device to execute the steps of Embodiment 1 of the present invention.

[0120] like Figure 6As shown, a program product 600 for implementing the method for controlling the stirring intensity of VAR melting of titanium alloys according to Embodiment 1 of the present invention can be a portable compact disk read-only memory (CD-ROM) and includes program code, and can run on a terminal device, such as a personal computer. The readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0121] The program product 600 may employ any combination of one or more readable media. The readable media may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0122] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting programs for use by or in conjunction with an instruction execution system, apparatus, or device.

[0123] The program code contained on the readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0124] Program code for performing the operations of Embodiment 1 of the present invention can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0125] also, Figure 5 and Figure 6 The processes shown do not indicate or limit the temporal order of these processes. These processes can be executed synchronously or asynchronously in multiple modules.

Claims

1. A method for controlling the stirring intensity during VAR melting of titanium alloys, characterized in that, The specific steps are as follows: Step 1. Obtain the desired stirring strength range for VAR primary melting of titanium alloys; Step 2. Determine the desired molten pool rotation angle range based on the desired stirring intensity range; Step 3. Acquire images of the ripples on the surface of the molten pool during the first melting of the titanium alloy in a vacuum arc furnace; Step 4. Perform image recognition on the molten pool ripple image to obtain the target molten pool rotation angle; Step 5. Determine the target molten pool rotation angle and the desired molten pool rotation angle range; Step 6. Adjust the current melting arc stabilization parameter of the vacuum self-consuming electric arc furnace to the target melting arc stabilization parameter, so as to control the melting stirring intensity of the molten pool within the desired stirring intensity range; Step 1 specifically involves: Step 1.

1. Obtain the melting property parameters of the titanium alloy to be smelted and the inner diameter of the crucible corresponding to the vacuum consumable arc furnace; the melting property parameters include at least the depth of the molten pool, the density of the molten titanium alloy, and the viscosity of the molten titanium alloy during smelting; Step 1.

2. Determine the molten pool stirring power density based on the smelting property parameters and the inner diameter of the crucible, and use the molten pool stirring power density as the desired stirring intensity range; In step 1.2, the power density of the molten pool stirring is calculated as follows: Where ε is the stirring power density, in W / kg; P is the stirring power, in W; and m is the weight of the molten pool during titanium alloy smelting, in kg. The power conversion factor; Density of molten titanium alloy, in kg / m³ 3 n represents the stirring speed of the molten pool, in seconds (s). -1 ; d is the inner diameter of the crucible, in meters; R e is the Reynolds number; Z is the depth of the molten pool, in meters (m). The viscosity of the titanium alloy melt is expressed in Pa·s. , For intermediate parameters; Step 4 specifically involves: dividing the molten pool ripple image from Step 3 into multiple image blocks; filtering image regions belonging to the molten pool ripple based on the image texture features in each image block; determining the angle between the molten pool ripple and the crucible chamfer based on the image regions belonging to the molten pool ripple, and using the angle between the molten pool ripple and the crucible chamfer as the target molten pool rotation angle; Step 5 specifically involves: determining the difference data between the target molten pool rotation angle described in step 4 and the boundary value of the desired molten pool rotation angle range described in step 2; and determining the target smelting arc stabilization parameters based on the difference data.

2. The method for controlling the stirring intensity of VAR melting of titanium alloys according to claim 1, characterized in that, Step 2 specifically involves: obtaining the pre-calculated conversion coefficient; and determining the desired molten pool rotation angle range based on the desired stirring intensity range described in Step 1 and the conversion coefficient.

3. The method for controlling the stirring intensity of VAR melting of titanium alloys according to claim 2, characterized in that, The formula for calculating the desired molten pool rotation angle range is as follows: in, This represents the desired range of molten pool rotation angles, i.e., the range of angles between the molten pool ripples and the crucible chamfer. This represents the conversion factor, which is a constant and ranges from 1 × 10⁻⁶. 5 ~4×10 5 .

4. The method for controlling the stirring intensity of VAR melting of titanium alloys according to claim 1 or 2, characterized in that, In step 2, the desired molten pool rotation angle range is 30°~50°.

5. The method for controlling the stirring intensity of VAR melting of titanium alloys according to claim 1, characterized in that, In step 6, the target melting arc stabilization parameter is used as the melting arc stabilization parameter to control the melting stirring intensity of titanium alloys of the same type as the titanium alloy to be refined.

6. The control device for the method of controlling the stirring intensity in VAR melting of titanium alloys as described in claim 1, characterized in that, include: The desired stirring intensity acquisition module (410) is used to acquire the desired stirring intensity range for melting the titanium alloy to be refined; The desired molten pool rotation angle determination module (420) is used to determine the desired molten pool rotation angle range based on the desired stirring intensity range. The molten pool ripple image acquisition module (430) is used to acquire images of the molten pool ripples on the surface of the molten pool when the titanium alloy to be refined is melted into a molten pool in a vacuum consumable arc furnace in one melting process. The target molten pool rotation angle determination module (440) is used to perform image recognition on the molten pool ripple image to obtain the target molten pool rotation angle. The melting arc stabilization parameter determination module (450) is used to determine the target melting arc stabilization parameters based on the target melting pool rotation angle and the desired melting pool rotation angle range. The smelting stirring intensity adjustment module (460) is used to adjust the current smelting arc stabilization parameters of the vacuum self-consuming electric arc furnace to the target smelting arc stabilization parameters, so as to control the smelting stirring intensity of the molten pool to be within the desired stirring intensity range.

Images