A method for eliminating short circuits during the feeding stage of titanium alloy ingot melting.

Abstract

This invention belongs to the field of titanium alloy ingot preparation technology, specifically relating to a method for eliminating short circuits during the feeding stage of titanium alloy ingot melting. The specific process involves: without applying a stabilizing current, by designing a low current, low voltage, and long-term holding period, a full, uniform weld pool with no overflow is obtained at the weld head; simultaneously, during the feeding process, the current density is reduced to 0.01 A / mm². 2 ~0.015A / mm 2 The current drop rate and droplet parameters within the specified range are monitored and controlled, ultimately resulting in large-size titanium alloy ingots without short-circuit anomalies during the feeding process. This invention solves the problem of short circuits easily occurring during the feeding stage of existing titanium alloy ingots with dimensions of Φ820mm to Φ1050mm.

Description

Technical Field

[0001] This invention belongs to the field of titanium alloy ingot preparation technology, specifically relating to a method for eliminating short circuits during the feeding stage of titanium alloy ingot smelting. Background Technology

[0002] In the industrial production of titanium alloys, a vacuum arc furnace is typically used. The titanium alloy ingot is produced through three melting processes. The final melting process (the third melting) can be divided into three stages: the arc initiation stage, the normal melting stage, and the head-feeding stage. The head-feeding stage usually employs a process of "gradually reducing power + low-current holding." When the current drops below one-third of the normal melting current, the low-current holding stage begins. This low-current holding keeps the molten pool surface molten, allowing molten metal to continuously enter the pool to fill the volume shrinkage caused by solidification and crystallization. This gradually reduces the volume and depth of the molten pool from bottom to top, ensuring that the head-feeding pool, shrinkage cavities, and porosity are minimized when the power is cut off at the end of the melting process, reducing riser weight and improving yield.

[0003] Under the existing technology, during the feeding stage of titanium alloy ingots with specifications of Φ820mm~Φ1050mm, especially during the low current heat preservation stage, short circuits are very likely to occur. There are three reasons for this: (1) Under the existing technology, the welding parameters of the ingot head need to be set with a stable arc current. For example, the authorization announcement number CN109702292B provides a welding process for VAR titanium alloy ingots. The purpose of setting the stable arc current is to ensure that the welding arc light travels evenly on the welding surface, ensure that the end face is heated evenly, and constrain the welding pool to avoid the overflow of the molten pool and thus prevent welding defects. For the head welding of large-sized ingots such as Φ820mm~Φ1050mm, due to the increase in ingot size and electrode length, the head welding is often carried out outside the crucible. Not only does the area to be welded increase, but it is also impossible to apply a stable arc magnetic field to confine the molten pool. Therefore, the molten pool is very easy to overflow during head welding, affecting the welding quality and easily causing unevenness of the welded molten pool. As a result, after a long period of baking in the current-reducing stage, the auxiliary electrode and the electrode welding point will locally separate, causing the molten residue plate to droop on one side or form an umbrella shape after contacting the molten pool and short circuit. (2) When using the conventional feeding process route for large-sized ingots of Φ820mm~Φ1050mm, the serrated morphology at the edge of the molten residue plate is more likely to appear during the baking stage in the later stage of feeding, which causes short circuit. This is because the current density usually drops to 0.01A / mm 2 ~0.015A / mm 2During the stage, due to the baking effect of small current, molten droplets are easily generated on the electrode end face and adhere to the edge. After solidification, they form a serrated shape. Under the same process route, compared with small and medium-sized ingots, the large-sized ingots are kept for a significantly longer time during the feeding stage, and the heat storage is obvious. This causes the "serrations" to grow rapidly and become longer during this stage, and short circuit occurs when they contact the molten pool. (3) Since the current surge and voltage drop often occur in an instant (millisecond or second level) during a short circuit, it is difficult for existing equipment to monitor and take real-time response adjustment. Usually, the short circuit is relieved by manually raising the electrode rod after the short circuit occurs.

[0004] Currently, there is no effective method to eliminate short-circuit anomalies during the feeding stage of smelting titanium alloy ingots with diameters ranging from Φ820mm to Φ1050mm. Once a short circuit occurs, it severely disrupts the continuity of the molten pool filling and crystal structure. This can lead to issues ranging from excessive shrinkage cavities and risers, reducing yield, to intermittent solidification, affecting compositional uniformity. Therefore, developing a method to eliminate short circuits during the feeding stage of smelting titanium alloy ingots with diameters ranging from Φ820mm to Φ1050mm is essential. Summary of the Invention

[0005] The purpose of this invention is to provide a method for eliminating short circuits during the melting and feeding stage of titanium alloy ingots, aiming to solve the problem that short circuits are prone to occur during the melting and feeding stage of existing titanium alloy ingots with specifications of Φ820mm~Φ1050mm.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for eliminating short circuits during the feeding stage of titanium alloy ingot smelting, used to prepare titanium alloy ingots with dimensions of Φ820~Φ1050mm, specifically includes the following steps:

[0008] S1. Prepare consumable electrode, auxiliary electrode and crucible. Assemble the consumable electrode in the crucible. Place the crucible in the vacuum consumable arc furnace. Install the auxiliary electrode on the pneumatic clamp of the electrode rod. Seal the furnace and evacuate it to prepare for welding in the furnace.

[0009] S2. The auxiliary electrode and the consumable electrode are head-welded in a vacuum consumable arc furnace without the need to apply an arc-stabilizing current during welding.

[0010] S3. After welding, place the consumable electrode in the crucible, seal the furnace, draw a vacuum, and start arc melting; the melting current is 20A~35A, and the melting voltage is 25V~40V;

[0011] S4. When the unmelted weight of the consumable electrode is between 300 and 500 kg, feeding begins. The feeding process employs a "gradual current reduction + low-current holding" method. During the gradual current reduction process, the following special requirements apply to the control of the current reduction rate: when the current density decreases to 0.01 A / mm²... 2 ~0.015A / mm 2 When the range is wide, the descent rate needs to be increased; during the feeding process, the droplet parameters are monitored. When the droplet value is greater than 10-15 d / s, the electrode rod is automatically triggered to rise by 5-10 mm, and finally a titanium alloy ingot with a diameter of Φ820-Φ1050 mm is obtained without short circuit during the feeding process.

[0012] Preferably, during the S4 feeding process, the method for controlling the current decrease rate is: when the current density is higher than 0.015 A / mm 2 At that time, the current decreasing rate was in the range of 0.1–1 kA / min, and decreased step by step; when the current density decreased to 0.01 A / mm... 2 ~0.015A / mm 2 When the current density is within the specified range, the descent rate needs to be appropriately increased to ensure that the current descent rate is between 0.6 and 1.0 kA / min; when the current density is below 0.01 A / mm... 2 At that time, the rate of current decrease was <0.1kA / min.

[0013] Preferably, during the S4 feeding process, the droplet parameters are monitored. When the droplet value increases to 15d / s, the electrode rod is immediately and automatically raised by 5mm to 10mm. If the droplet value drops below 15d / s, the electrode rod raising action stops. If the droplet value does not decrease, the electrode rod continues to be raised until the droplet value drops below 15d / s.

[0014] Preferably, in S2, when the auxiliary electrode and the consumable electrode are welded together, the welding process goes through the following stages: arc initiation stage, low current stage, low voltage stage, long-term heat preservation stage, molten pool exit stage, and high current stage. The current, voltage, and time parameters for each stage are set in the following order: (2~6kA) / (20~25V) / (1~4min)→(4~7kA) / (22~26V) / (10~15min)→(5~10kA) / (24~27V) / (3~6min)→(8~20kA) / (26~30V) / (2~5min).

[0015] Preferably, in step S1, the auxiliary electrode has a specification of Φ360mm~Φ460mm, the consumable electrode has a specification of Φ720mm~Φ920mm, and the crucible has a specification of Φ820mm~Φ1050mm.

[0016] Compared to traditional technologies, this invention can completely eliminate This invention addresses the short-circuit problem during the feeding stage of finished titanium alloy ingot smelting. By designing a low-current, low-voltage, and long-term holding period without applying a stabilizing current, it achieves a full, uniform weld pool and a weld head with no overflow. Simultaneously, during the feeding process, the current density is reduced to 0.01 A / mm². 2 ~0.015A / mm 2 The current drop rate and droplet parameters within the specified range are monitored and controlled, ultimately resulting in large-size titanium alloy ingots without short-circuit anomalies during the feeding process. This reduces the difficulty of feeding operations in titanium alloy ingot smelting and further improves the stability of ingot riser size and yield. Attached Figure Description

[0017] Figure 1 This is a top view of the welding morphology during the arc initiation stage.

[0018] Figure 2 This is a top view of the outer edge morphology of the welded end face during the low current, low voltage, and long-term heat preservation stage.

[0019] Figure 3 A top view of the "sawtooth" morphology of the swept edges during the high current stage.

[0020] Figure 4 This is a top view of the shape after welding is completed. Detailed Implementation

[0021] The method for eliminating short circuits during the feeding stage of titanium alloy ingot smelting according to the present invention, used to prepare titanium alloy ingots with a diameter of Φ820~Φ1050mm, specifically includes the following steps:

[0022] S1. Prepare consumable electrode, auxiliary electrode and crucible. Assemble the consumable electrode in the crucible and place the crucible in the vacuum consumable arc furnace. Install the auxiliary electrode on the pneumatic clamp of the electrode rod. Seal the furnace and evacuate it to prepare for welding in the furnace. The specifications of the auxiliary electrode are Φ360mm~Φ460mm, the specifications of the consumable electrode are Φ720mm~Φ920mm, and the specifications of the crucible are Φ820mm~Φ1050mm.

[0023] S2. The auxiliary electrode and the consumable electrode are welded at the head in a vacuum consumable arc furnace. No arc stabilizing current is required during welding. The welding parameters are shown in Table 1. Finally, a full weld pool is obtained, achieving a 1+1>2 effect.

[0024] Table 1 Welding parameters for the head of titanium alloy ingots with diameters of Φ820~Φ1050mm

[0025]

[0026]

[0027] During the arc initiation stage, set the current to 2kA-6kA, the voltage to 20-25V, and the welding time to 1-4 minutes. The purpose is to preheat the surfaces to be welded. Figure 1 As shown;

[0028] During the low-current, low-voltage, and long-term heat-holding stage, the current is set to 4kA–7kA, the voltage to 22V–26V, and the welding time to 10–15 minutes. The purpose is to create a serrated morphology of approximately 20mm–30mm long on the outer edge of the auxiliary electrode end face through prolonged heat holding, thereby constraining the overflow of the molten pool. Figure 2 As shown;

[0029] During the high-current phase, the current is set to 8kA–20kA, the voltage to 26V–30V, and the welding time to 2–5 minutes. The purpose is to sweep the "serrations" on the outer edge of the auxiliary electrode face down to the electrode face before short-circuit welding. This ensures the auxiliary electrode face is relatively flat during short-circuit welding; furthermore, the swept-down "serrations" form a barrier on the electrode face to prevent molten pool overflow, ensuring a full molten pool during welding. Figure 3 As shown;

[0030] Finally, once all the "jagged edges" that appeared during the welding process have been removed and the entire molten pool is full, immediately press down the electrode rod to complete the short-circuit welding. The finished weld will look like this. Figure 4 As shown.

[0031] S3. After welding, place the consumable electrode in the crucible, seal the furnace, draw a vacuum, and start arc melting; the melting current is 20A~35A, and the melting voltage is 25V~40V;

[0032] S4. When the unmelted weight of the consumable electrode is between 300 and 500 kg, feeding begins. The feeding process employs a "gradual current reduction + low-current holding" method. During the gradual current reduction process, the following special requirements apply to the control of the current reduction rate: when the current density decreases to 0.01 A / mm²... 2 ~0.015A / mm 2 When the range is wide, the descent rate needs to be increased to avoid the appearance of obvious long "sawtooth" morphology on the electrode end face; during the feeding process, the droplet parameters are monitored. When the droplet value is greater than 10-15 d / s, the electrode rod is automatically triggered to rise by 5mm-10mm to prevent short circuits. Finally, a titanium alloy ingot with a diameter of Φ820-Φ1050mm is obtained without short circuits during the feeding process.

[0033] Specifically, the method for controlling the rate of current decrease is: when the current density is higher than 0.015 A / mm 2 At that time, the current decreasing rate was in the range of 0.1–1 kA / min, and decreased step by step; when the current density decreased to 0.01 A / mm... 2~0.015A / mm 2 When the current density is within the specified range, the descent rate needs to be appropriately increased to ensure that the current descent rate is between 0.6 and 1.0 kA / min; when the current density is below 0.01 A / mm... 2 At that time, the rate of current decrease was <0.1kA / min.

[0034] Specifically, the droplet parameters are monitored. When the droplet value increases to 15d / s, the electrode rod is immediately and automatically raised by 5mm to 10mm. If the droplet value drops below 15d / s, the electrode rod raising action stops. If the droplet value does not decrease, the electrode rod continues to rise until the droplet value drops below 15d / s.

[0035] The embodiments of the present invention use TC4 titanium alloy ingots for specific explanation.

[0036] Example 1

[0037] A method for eliminating short circuits during the feeding stage of TC4 titanium alloy ingot smelting, used to prepare TC4 titanium alloy ingots with a diameter of Φ820, specifically includes the following steps:

[0038] S1. Prepare a Φ720mm consumable electrode, a Φ360mm auxiliary electrode, and a Φ820mm crucible. Assemble the consumable electrode in the crucible, place the crucible in the vacuum consumable arc furnace, install the auxiliary electrode on the pneumatic clamp of the electrode rod, seal the furnace and evacuate it to prepare for welding inside the furnace.

[0039] S2. Perform head welding of the auxiliary electrode and consumable electrode in a vacuum consumable arc furnace. No arc stabilizing current is required during welding. Refer to Table 2 for welding parameters.

[0040] Table 2 Welding parameters for the head of Φ820 titanium alloy ingot

[0041] stage Current / kA Voltage / V Arc current / A Time / min Arc initiation stage 2～4 20～23 0 1～2 Low current, low voltage, long-term heat preservation stage 4～5 22～24 0 10～13 Out of the molten pool stage 5～8 24～25 0 3～4 High current stage 8～18 26～28 0 2～3

[0042] S3. After welding, place the consumable electrode in the crucible, seal the furnace, draw a vacuum, and start arc melting; the melting current is 20A~33A, and the melting voltage is 25V~38V;

[0043] S4. When the unmelted weight of the consumable electrode is 300kg, feeding begins. The feeding process employs a "gradual current reduction + low-current holding" method. During the gradual current reduction process, the following special requirements apply to the control of the current decrease rate: when the current density decreases to 0.01A / mm... 2 ~0.015A / mm 2When the range is wide, the descent rate needs to be increased to avoid the appearance of obvious long "sawtooth" morphology on the electrode end face; during the feeding process, the droplet parameters are monitored. When the droplet value is greater than 10-15d / s, the electrode rod is automatically triggered to rise by 5mm-10mm to prevent short circuits. Finally, a titanium alloy ingot with a diameter of Φ820 is obtained without short circuits during the feeding process.

[0044] Prepared using the above methods The probability of short circuit anomalies in TC4 titanium alloy ingots is 0%, and the riser size fluctuation between different furnace batches is around 20kg, further improving the stability of ingot riser size and yield.

[0045] Example 2

[0046] A method for eliminating short circuits during the feeding stage of TC4 titanium alloy ingot smelting, used to prepare TC4 titanium alloy ingots with a diameter of Φ920, specifically includes the following steps:

[0047] S1. Prepare a Φ820mm consumable electrode, a Φ410mm auxiliary electrode, and a Φ920mm crucible. Assemble the consumable electrode in the crucible, place the crucible in a vacuum consumable arc furnace, install the auxiliary electrode on the pneumatic clamp of the electrode rod, seal the furnace and evacuate it to prepare for welding inside the furnace.

[0048] S2. Perform head welding of the auxiliary electrode and consumable electrode in a vacuum consumable arc furnace. No arc stabilizing current is required during welding. Refer to Table 3 for welding parameters.

[0049] Table 3 Welding parameters for the head of Φ920 titanium alloy ingot

[0050]

[0051]

[0052] S3. After welding, place the consumable electrode in the crucible, seal the furnace, draw a vacuum, and start arc melting; the melting current is 21A~34A, and the melting voltage is 26V~39V;

[0053] S4. When the unmelted weight of the consumable electrode is 400kg, feeding begins. The feeding process employs a "gradual current reduction + low-current holding" method. During the gradual current reduction process, the following special requirements apply to the control of the current decrease rate: when the current density decreases to 0.01A / mm... 2 ~0.015A / mm 2When the range is wide, the descent rate needs to be increased to avoid the appearance of obvious long "sawtooth" morphology on the electrode end face; during the feeding process, the droplet parameters are monitored. When the droplet value is greater than 10-15d / s, the electrode rod is automatically triggered to rise by 5mm-10mm to prevent short circuits. Finally, a titanium alloy ingot with a diameter of Φ920 is obtained without short circuits during the feeding process.

[0054] Prepared using the above methods The probability of short circuit anomalies in TC4 titanium alloy ingots is 0%, and the riser size fluctuation between different furnace batches is around 20kg, further improving the stability of ingot riser size and yield.

[0055] Example 3

[0056] A method for eliminating short circuits during the feeding stage of TC4 titanium alloy ingot smelting, used to prepare TC4 titanium alloy ingots with a diameter of Φ1050, specifically includes the following steps:

[0057] S1. Preparation Specifications of consumable electrodes Specifications of auxiliary electrodes and The standard crucible is used to assemble the consumable electrode in the crucible. The crucible is placed in the vacuum consumable arc furnace. The auxiliary electrode is installed on the pneumatic clamp of the electrode rod. The furnace is sealed and a vacuum is drawn to prepare for welding inside the furnace.

[0058] S2. Perform head welding of the auxiliary electrode and consumable electrode in a vacuum consumable arc furnace. No arc stabilizing current is required during welding. Refer to Table 4 for welding parameters.

[0059] Table 4 Welding parameters for the head of Φ1050 titanium alloy ingot

[0060]

[0061]

[0062] S3. After welding, place the consumable electrode in the crucible, seal the furnace, draw a vacuum, and start arc melting; the melting current is 22A~35A, and the melting voltage is 27V~40V;

[0063] S4. When the unmelted weight of the consumable electrode is 500 kg, feeding begins. The feeding process employs a "gradual current reduction + low-current holding" method. During the gradual current reduction process, the following special requirements apply to the control of the current reduction rate: when the current density decreases to 0.01 A / mm²... 2 ~0.015A / mm 2When the range is wide, the descent rate needs to be increased to avoid the appearance of obvious long "sawtooth" morphology on the electrode end face; during the feeding process, the droplet parameters are monitored. When the droplet value is greater than 10-15d / s, the electrode rod is automatically triggered to rise by 5mm-10mm to prevent short circuits. Finally, a titanium alloy ingot with a diameter of Φ1050 is obtained without short circuits during the feeding process.

[0064] Using the above method, the probability of short circuit anomalies in Φ1050mm TC4 titanium alloy ingots was 0%, and the weight fluctuation of riser size between different furnaces was around 20kg, further improving the stability of ingot riser size and yield.

[0065] Comparative Example

[0066] The preparation of TC4 titanium alloy ingots with a diameter of Φ820 includes the following steps:

[0067] S1. Prepare a Φ720mm consumable electrode, a Φ360mm auxiliary electrode, and a Φ820mm crucible. Assemble the consumable electrode in the crucible, place the crucible in the vacuum consumable arc furnace, install the auxiliary electrode on the pneumatic clamp of the electrode rod, seal the furnace and evacuate it to prepare for welding inside the furnace.

[0068] S2. Perform head welding of the auxiliary electrode and consumable electrode in a vacuum consumable arc furnace. No arc stabilizing current is required during welding. Refer to Table 5 for welding parameters.

[0069] Table 5 Welding parameters for the head of Φ820 titanium alloy ingot

[0070]

[0071]

[0072] During welding, gradually increase the current and voltage values ​​and observe the molten pool. When the entire molten pool is full or when local molten pool overflows, the electrode rod needs to be pressed down immediately to complete the short-circuit welding.

[0073] When welding under conventional techniques, without setting a low current, low voltage, and long heat preservation stage, the auxiliary electrode end face will not form an obvious long sawtooth shape during welding. The entire welding process basically maintains a flat shape. In addition, when large-sized ingots are usually welded outside the crucible, it is impossible to apply a stable arc current to the molten pool, which can easily cause the molten pool to overflow.

[0074] S3. After welding, place the consumable electrode in the crucible, seal the furnace, draw a vacuum, and start arc melting; the melting current is 20A~33A, and the melting voltage is 25V~38V;

[0075] S4. When the unmelted weight of the consumable electrode is 300kg, feeding begins. The feeding process employs a "gradual current reduction + low-current heat preservation" method. During the gradual current reduction process, the current density is reduced to 0.01A / mm². 2 ~0.015A / mm 2 No special control is required for the rate of current decrease during the range; during the feeding process, conventional parameters such as current, voltage and vacuum are monitored and controlled, but droplet parameters are not monitored. If a short circuit occurs during the process, the electrode rod is manually lifted to remove the short circuit.

[0076] Prepared using the above methods The probability of short circuit anomalies in TC4 titanium alloy ingots is 10%. The riser size fluctuates by about 50 kg between different furnace batches, and the stability of ingot riser size and yield is relatively poor.

[0077] In summary, compared to traditional technologies, this invention can completely eliminate... To address the short-circuit problem during the feeding stage of finished titanium alloy ingot smelting, a method was developed that, without applying a stabilizing current, involves designing a low-current, low-voltage, and long-term heat-holding phase. This resulted in a full, uniform weld pool with no overflow at the weld head. Simultaneously, the current density was reduced to 0.01 A / mm² during the feeding process. 2 ~0.015A / mm 2 The current drop rate and droplet parameters within the specified range are monitored and controlled, ultimately resulting in large-size titanium alloy ingots without short-circuit anomalies during the feeding process. This reduces the difficulty of feeding operations in titanium alloy ingot smelting and further improves the stability of ingot riser size and yield.

Claims

1. A method for eliminating short circuits during the feeding stage of titanium alloy ingot smelting, characterized in that, The process for preparing titanium alloy ingots with dimensions of Φ820~Φ1050mm includes the following steps: S1. Prepare consumable electrode, auxiliary electrode and crucible. Assemble the consumable electrode in the crucible. Place the crucible in the vacuum consumable arc furnace. Install the auxiliary electrode on the pneumatic clamp of the electrode rod. Seal the furnace and evacuate it to prepare for welding in the furnace. S2. The auxiliary electrode and the consumable electrode are head-welded in a vacuum consumable arc furnace without the need to apply an arc-stabilizing current during welding. S3. After welding, place the consumable electrode in the crucible, seal the furnace, draw a vacuum, and start arc melting; the melting current is 20A~35A, and the melting voltage is 25V~40V; S4. When the unmelted weight of the consumable electrode is between 300 and 500 kg, feeding begins. The feeding process employs a "gradual current reduction + low-current heat preservation" method. During the gradual current reduction process, the following special requirements apply to the control of the current reduction rate: when the current density decreases to 0.01 A / mm²... 2 ~0.015A / mm 2 When the range is wide, the descent rate needs to be increased; during the feeding process, the droplet parameters are monitored. When the droplet value is greater than 10-15 d / s, the electrode rod is automatically triggered to rise by 5-10 mm, and finally a titanium alloy ingot with a diameter of Φ820-Φ1050 mm is obtained without short circuit during the feeding process.

2. The method for eliminating short circuits during the feeding stage of titanium alloy ingot smelting according to claim 1, characterized in that, During the S4 feeding process, the method for controlling the rate of current decrease is as follows: when the current density is higher than 0.015 A / mm² 2 At that time, the current decreasing rate was in the range of 0.1–1 kA / min, and decreased step by step; when the current density decreased to 0.01 A / mm... 2 ~0.015A / mm 2 When the current density is within the specified range, the descent rate needs to be increased to ensure that the current descent rate is between 0.6 and 1.0 kA / min; when the current density is below 0.01 A / mm... 2 At that time, the rate of current decrease was <0.1kA / min.

3. The method for eliminating short circuits during the feeding stage of titanium alloy ingot smelting according to claim 1, characterized in that, During the S4 feeding process, the droplet parameters are monitored. When the droplet value increases to 15d / s, the electrode rod is immediately and automatically raised by 5mm to 10mm. If the droplet value drops below 15d / s, the electrode rod raising action stops. If the droplet value does not decrease, the electrode rod continues to rise until the droplet value drops below 15d / s.

4. The method for eliminating short circuits during the feeding stage of titanium alloy ingot smelting according to claim 1, characterized in that, In S2, when the auxiliary electrode and the consumable electrode are welded together, the process goes through the arc initiation stage, the low current stage, the low voltage stage, the long heat holding stage, the molten pool exit stage, and the high current stage. The current, voltage, and time parameters of each stage are set in the following order: (2~6kA) / (20~25V) / (1~4min)→(4~7kA) / (22~26V) / (10~15min)→(5~10kA) / (24~27V) / (3~6min)→(8~20kA) / (26~30V) / (2~5min).

5. The method for eliminating short circuits during the feeding stage of titanium alloy ingot smelting according to claim 1, characterized in that, In S1, the auxiliary electrode has a specification of Φ360mm~Φ460mm, the consumable electrode has a specification of Φ720mm~Φ920mm, and the crucible has a specification of Φ820mm~Φ1050mm.

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