CN110669955A - Smelting feeding method for industrial common-specification titanium alloy ingots - Google Patents
Smelting feeding method for industrial common-specification titanium alloy ingots Download PDFInfo
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Abstract
A smelting feeding method for a titanium alloy ingot casting with an industrial common specification comprises the steps of uniformly mixing titanium sponge and intermediate alloy according to GB/T3620.1, pressing an electrode block, and welding a pressed electrode to form an electrode; smelting the electrode serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a primary ingot; carrying out secondary smelting on the primary ingot serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a secondary ingot; and (3) taking the secondary ingot as a consumable electrode to carry out three times of smelting in a vacuum consumable arc furnace, and feeding at the later stage of smelting. The method has the advantages of reducing the dead head cutting amount of the ingot casting with the industrial common specification, improving the ingot casting yield and the uniformity of the components of the head of the ingot casting, and controlling the dead head cutting amount to be 40-70 mm. During feeding, a mode of gradually degrading current at different rates is adopted, so that the depth of a molten pool is continuously reduced, and the position of a shrinkage cavity moves upwards to reduce the cutting amount of a riser.
Description
Technical Field
The invention belongs to the technical field of titanium alloy preparation, and particularly relates to a smelting feeding method of an industrial common specification (phi 450-phi 720mm) titanium alloy ingot.
Background
The titanium alloy has high specific strength, corrosion resistance, good high and low temperature performance, shape memory, biocompatibility and other excellent performances, is first widely applied in the fields of aerospace, ships and other high technologies in China, and is gradually popularized to the fields of petroleum, chemical engineering, medical treatment and the like. With the wide application of the fields, high requirements are put forward on the performance, the cost and the like of the titanium alloy material, on one hand, the uniformity of the material is required to be good, and on the other hand, the cost is required to be reduced. However, in the case of an ingot of a standard which is commonly used in industry, the uniformity of the composition and the yield of the ingot are reduced as the size of the ingot is increased. The composition uniformity is generally ensured by optimizing an intermediate alloy, increasing the smelting current, increasing the arc stabilizing current and the like, but feeding at the final stage of smelting is often ignored, so that the ingot yield is low.
Disclosure of Invention
The invention aims to provide a method for smelting and feeding a titanium alloy ingot with an industrial common specification (phi 450-phi 720mm), which solves the problems of large dead head cutting amount, poor head uniformity and low yield of the ingot.
In order to achieve the purpose, the invention adopts the technical scheme that:
a smelting feeding method for an industrial common-specification titanium alloy ingot comprises the following steps:
1) electrode preparation
Uniformly mixing titanium sponge and intermediate alloy according to the mass percentage of elements corresponding to each grade of titanium alloy in GB/T3620.1, pressing an electrode block, and welding a pressed electrode into an electrode;
2) one-time smelting
Smelting the electrode prepared in the step 1) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a primary ingot;
3) secondary smelting
Carrying out secondary smelting on the primary ingot prepared in the step 2) serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a secondary ingot;
4) three-time smelting
And 3) taking the secondary ingot prepared in the step 3) as a consumable electrode to carry out three times of smelting in a vacuum consumable arc furnace, and feeding in a step-by-step current reduction mode in the later stage of smelting to obtain a titanium alloy finished ingot.
In a further development of the invention, in step 1), the master alloy comprises: one or more of aluminum-vanadium intermediate alloy, aluminum beans, titanium dioxide, aluminum-molybdenum intermediate alloy, sponge zirconium and titanium-silicon alloy.
The further improvement of the invention is that in the step 2), the smelting current is 8.0-22.0 KA, the smelting voltage is 25.0-35.0V, and the arc stabilizing current is DC 8.0-15.0A.
The invention is further improved in that in the step 2), the consumable electrode is inverted during charging.
The further improvement of the invention is that in the step 3), the smelting current is 10.0-25.0 KA, the smelting voltage is 27.0-38.0V, the arc stabilizing current is AC 10.0-20.0A, and the stirring period is 15-60S.
The further improvement of the invention is that in the step 4), the smelting current is 12.0-28.0 KA, the smelting voltage is 28.0-40.0V, the arc stabilizing current is AC 10.0-25.0A, the stirring period is 15-60S, and feeding is started when the consumable electrode smelting residual is 100-400 kg.
The further improvement of the invention is that the change slope of the smelting current along with time is 1.2-1.5, 0.5, 0.3, 0.2, 0.05 and 0.03, the smelting voltage is reduced to 80-90% of the normal smelting stage when the current is reduced, and the arc stabilizing current is reduced to 50-60% of the normal smelting stage when the smelting current slope is 0.05.
The invention is further improved in that the method also comprises the following steps: 5) peeling off the titanium alloy finished ingot, detecting a flaw and sawing a riser.
Compared with the prior art, the invention has the following beneficial effects: the method has the advantages of reducing the dead head cutting amount of the ingot with the industrial common specification (phi 450-phi 720mm), improving the ingot yield and the uniformity of the ingot head components, and controlling the dead head cutting amount to be 40-70 mm. During feeding, a mode of gradually degrading current at different rates is adopted, so that the depth of a molten pool is continuously reduced, and the position of a shrinkage cavity moves upwards to reduce the cutting amount of a riser. The smelting voltage is reduced and the arc stabilizing current is reduced at the last stage of feeding, so that on one hand, arc breaking is prevented, the arc light is stabilized, and safe operation is facilitated; on the other hand, the stirring is reduced to prevent the problem of low yield caused by overhigh cast ingot burrs.
Furthermore, the smelting current is controlled in the smelting process, and particularly, the stirring period is prolonged in the third smelting process, so that the component uniformity of the industrial common-specification ingot is improved.
Detailed Description
The present invention is described in further detail below by way of examples.
A smelting feeding method for titanium alloy ingots with commonly used industrial specifications (phi 450 mm-phi 720mm) specifically comprises the following steps:
1) electrode preparation
Uniformly mixing titanium sponge, intermediate alloy and the like according to the mass percentage of elements corresponding to each grade of titanium alloy in GB/T3620.1, pressing an electrode block, and welding a pressed electrode into an electrode; the master alloy comprises: one or more of aluminum-vanadium intermediate alloy, aluminum beans, titanium dioxide, aluminum-molybdenum intermediate alloy, sponge zirconium and titanium-silicon alloy;
2) one-time smelting
Smelting the electrode prepared in the step 1) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a primary ingot;
3) secondary smelting
Performing secondary smelting on the primary ingot prepared in the step 2) serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a secondary ingot, wherein the electrode needs to be inverted when the furnace is charged, namely the head of the electrode faces downwards;
4) three-time smelting
And 3) taking the secondary ingot prepared in the step 3) as a consumable electrode to carry out three times of smelting in a vacuum consumable arc furnace, and feeding at the later stage of smelting, thereby obtaining a third ingot.
5) Peeling the cast ingot, sampling, detecting a flaw, and sawing a dead head, thereby obtaining a titanium alloy finished product cast ingot.
Further, in the step 2), the smelting current is 8.0-22.0 KA, and the smelting voltage is as follows: 25.0-35.0V, and the arc stabilizing current is DC 8.0-15.0A;
further, in the step 3), the smelting current is 10.0-25.0 KA, and the smelting voltage is as follows: 27.0-38.0V, the arc stabilizing current is AC 10.0-20.0A, and the stirring period is 15-60S;
further, in the step 4), the smelting current is 12.0-28.0 KA, and the smelting voltage is as follows: 28.0-40.0V, the arc stabilizing current is AC 10.0-25.0A, the stirring period is 15-60S, and feeding is started when the consumable electrode smelting is 100-400 kg.
Further, in the step 4), the feeding is performed by gradually decreasing the current, preferably, the gradient of the melting current along with the time change is 1.2-1.5 → 0.5 → 0.3 → 0.2 → 0.05 → 0.03, the melting voltage is decreased to 80-90% of the normal melting stage while the current is decreased, and the arc stabilizing current is decreased to 50-60% of the normal melting stage when the gradient of the melting current is 0.05.
The following are specific examples.
Example 1
Preparing an ingot of phi 450mmTC4 titanium alloy (nominal composition Ti-6 Al-4V):
1) electrode preparation
Weighing the sponge titanium, the aluminum-vanadium intermediate alloy, the aluminum beans and the titanium dioxide according to the mass percentage, uniformly mixing, pressing the electrode block, and welding the pressed electrode into an electrode.
2) One-time smelting
Smelting the electrode prepared in the step 1) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a primary ingot with the diameter of 280mm, wherein the smelting current is 8.0-10.0 KA, and the smelting voltage is as follows: 25.0-32.0V, and the arc stabilizing current is DC 8-10A;
3) secondary smelting
Carrying out secondary smelting on the primary ingot prepared in the step 2) serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a secondary ingot with the diameter of 360mm, wherein the electrode needs to be inverted when the ingot is charged, namely the head of the electrode faces downwards, the smelting current is 10.0-12.0 KA, and the smelting voltage is as follows: 27.0-33.0V, arc stabilizing current of AC 10.0-12.0A, and stirring period of 15-30S;
4) three-time smelting
Carrying out three times of smelting on the secondary ingot prepared in the step 3) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a third ingot with the diameter of 450mm, wherein the smelting current is 12.0-14.0 KA, and the smelting voltage is as follows: 28.0-35.0V, arc stabilizing current is AC 12.0-15.0A, stirring period is 15-30S, and feeding is carried out when the consumable electrode smelting residual is 100-120 kg. Feeding is carried out in a step-by-step current reduction mode, the gradient of the smelting current along with time is 1.2-1.5 → 0.5 → 0.3 → 0.2 → 0.05 → 0.03, the smelting voltage is reduced to 80-90% of the normal smelting stage when the current is reduced, and the arc stabilizing current is reduced to 50-60% of the normal smelting stage when the gradient of the smelting current is 0.05.
5) Peeling the cast ingot, sampling, detecting a flaw, and sawing a riser to obtain a TC4 titanium alloy finished ingot.
The cutting amount of the cast ingot riser is 40-50 mm, and the test results of chemical components of three longitudinal points of the cast ingot and nine transverse head points are shown in tables 1-1 and 1-2. It can be seen that the longitudinal components of the cast ingot meet the requirements of GB/T3620.1 titanium and titanium alloy brand and chemical components, the main components tested at nine transverse points of the head also meet the standard requirements, and the components have good uniformity.
TABLE 1-1 ingot longitudinal chemical composition
TABLE 1-2 ingot transverse nine-point chemical composition
Example 2
Phi 540mmTA15 titanium alloy (nominal composition Ti-6.5Al-1Mo-1V-2Zr) ingot preparation:
1) electrode preparation
Weighing titanium sponge, aluminum-vanadium intermediate alloy, aluminum-molybdenum intermediate alloy, aluminum beans, sponge zirconium and titanium dioxide according to mass percentage, uniformly mixing, pressing electrode blocks, and welding pressed electrodes to form the electrode.
2) One-time smelting
Smelting the electrode prepared in the step 1) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a primary ingot with the diameter of 360mm, wherein the smelting current is 9.0-13.0 KA, and the smelting voltage is as follows: 26.0-33.0V, and the arc stabilizing current is DC 10-20A;
3) secondary smelting
Carrying out secondary smelting on the primary ingot prepared in the step 2) serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a secondary ingot with the diameter of 450mm, wherein the electrode needs to be inverted when the ingot is charged, namely the head of the electrode faces downwards, the smelting current is 13.0-18.0 KA, and the smelting voltage is as follows: 28.0-34.0V, the arc stabilizing current is AC 12.0-15.0A, and the stirring period is 15-30S;
4) three-time smelting
Carrying out three times of smelting on the secondary ingot prepared in the step 3) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a three-time ingot with the phi of 540mm, wherein the smelting current is 18.0-22.0 KA, and the smelting voltage is as follows: 28.0-38.0V, the arc stabilizing current is AC 15.0-25.0A, the stirring period is 15-45S, and feeding is carried out when the consumable electrode smelting residual is 200-240 kg. Feeding is carried out in a step-by-step current reduction mode, the gradient of the smelting current along with time is 1.2-1.5 → 0.5 → 0.3 → 0.2 → 0.05 → 0.03, the smelting voltage is reduced to 80-90% of the normal smelting stage when the current is reduced, and the arc stabilizing current is reduced to 50-60% of the normal smelting stage when the gradient of the smelting current is 0.05.
5) Peeling the cast ingot, sampling, detecting a flaw, and sawing a riser to obtain a TA15 titanium alloy finished ingot.
The cutting amount of the cast ingot riser is 45-55 mm, and the test results of chemical components of three longitudinal points of the cast ingot and nine transverse head points are shown in tables 2-1 and 2-2. It can be seen that the longitudinal components of the cast ingot meet the requirements of GB/T3620.1 titanium and titanium alloy brand and chemical components, the main components tested at nine transverse points of the head also meet the standard requirements, and the components have good uniformity.
TABLE 2-1 ingot longitudinal chemical composition
TABLE 2-2 ingot transverse nine-point chemical composition
Example 3
Ingot preparation of phi 630mmTC11 titanium alloy (nominal composition Ti-6.5Al-3.5Mo-1.5Zr-0.3 Si):
1) electrode preparation
Weighing titanium sponge, aluminum-molybdenum intermediate alloy, aluminum beans, zirconium sponge, titanium-silicon alloy and titanium dioxide according to mass percentage, uniformly mixing, pressing an electrode block, and welding a pressed electrode to form the electrode.
2) One-time smelting
Smelting the electrode prepared in the step 1) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a primary ingot with the diameter of 450mm, wherein the smelting current is 13.0-18.0 KA, and the smelting voltage is as follows: 28.0-35.0V, and the arc stabilizing current is DC 12-18A;
3) secondary smelting
Carrying out secondary smelting on the primary ingot prepared in the step 2) serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a phi 540mm secondary ingot, wherein the electrode needs to be inverted when the ingot is charged, namely the head of the electrode faces downwards, the smelting current is 18.0-21.0 KA, and the smelting voltage is as follows: 28.0-38.0V, the arc stabilizing current is AC 12.0-15.0A, and the stirring period is 15-45S;
4) three-time smelting
Carrying out three times of smelting on the secondary ingot prepared in the step 3) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a three-time ingot with the diameter of 630mm, wherein the smelting current is 18.0-22.0 KA, and the smelting voltage is as follows: 28.0-38.0V, arc stabilizing current of AC 15.0-25.0A, stirring period of 30-60S, and feeding when consumable electrode smelting is 300-350 kg. Feeding is carried out in a step-by-step current reduction mode, the gradient of the smelting current along with time is 1.2-1.5 → 0.5 → 0.3 → 0.2 → 0.05 → 0.03, the smelting voltage is reduced to 80-90% of the normal smelting stage when the current is reduced, and the arc stabilizing current is reduced to 50-60% of the normal smelting stage when the gradient of the smelting current is 0.05.
5) Peeling the cast ingot, sampling, detecting a flaw, and sawing a riser to obtain a TC11 titanium alloy finished ingot.
The cutting amount of the cast ingot riser is 50-60 mm, and the test results of chemical components of three longitudinal points of the cast ingot and nine transverse head points are shown in tables 3-1 and 3-2. It can be seen that the longitudinal components of the cast ingot meet the requirements of GB/T3620.1 titanium and titanium alloy brand and chemical components, the main components tested at nine transverse points of the head also meet the standard requirements, and the components have good uniformity.
TABLE 3-1 ingot longitudinal chemical composition
TABLE 3-2 ingot transverse nine-point chemical composition
Example 4
Preparing an ingot of phi 720mmTC4 titanium alloy (nominal composition Ti-6 Al-4V):
1) electrode preparation
Weighing the sponge titanium, the aluminum-vanadium intermediate alloy, the aluminum beans and the titanium dioxide according to the mass percentage, uniformly mixing, pressing the electrode block, and welding the pressed electrode into an electrode.
2) One-time smelting
Smelting the electrode prepared in the step 1) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a phi 540mm primary ingot, wherein the smelting current is 18.0-22.0 KA, and the smelting voltage is as follows: 28.0-35.0V, and the arc stabilizing current is DC 15-25A;
3) secondary smelting
Carrying out secondary smelting on the primary ingot prepared in the step 2) serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a secondary ingot with the diameter of 630mm, wherein the electrode needs to be inverted when the ingot is charged, namely the head of the electrode faces downwards, the smelting current is 18.0-25.0 KA, and the smelting voltage is as follows: 28.0-38.0V, the arc stabilizing current is AC 15-25.0A, and the stirring period is 30-60S;
4) three-time smelting
Carrying out three times of smelting on the secondary ingot prepared in the step 3) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a phi 720mm tertiary ingot, wherein the smelting current is 22.0-28.0 KA, and the smelting voltage is as follows: 30.0-40.0V, the arc stabilizing current is AC 20.0-25.0A, the stirring period is 30-60S, and feeding is carried out when the consumable electrode smelting residual is 350-400 kg. Feeding is carried out in a step-by-step current reduction mode, the gradient of the smelting current along with time is 1.2-1.5 → 0.5 → 0.3 → 0.2 → 0.05 → 0.03, the smelting voltage is reduced to 80-90% of the normal smelting stage when the current is reduced, and the arc stabilizing current is reduced to 50-60% of the normal smelting stage when the gradient of the smelting current is 0.05.
5) Peeling the cast ingot, sampling, detecting a flaw, and sawing a riser to obtain a TC4 titanium alloy finished ingot.
The cutting amount of the cast ingot riser is 60-70 mm, and the test results of chemical components of three longitudinal points of the cast ingot and nine transverse head points are shown in tables 4-1 and 4-2. It can be seen that the longitudinal components of the cast ingot meet the requirements of GB/T3620.1 titanium and titanium alloy brand and chemical components, the main components tested at nine transverse points of the head also meet the standard requirements, and the components have good uniformity.
TABLE 4-1 ingot longitudinal chemical composition
TABLE 4-2 ingot transverse nine-point chemical composition
Claims (8)
1. A smelting feeding method of an industrial common-specification titanium alloy ingot is characterized by comprising the following steps:
1) electrode preparation
Uniformly mixing titanium sponge and intermediate alloy according to the mass percentage of elements corresponding to each grade of titanium alloy in GB/T3620.1, pressing an electrode block, and welding a pressed electrode into an electrode;
2) one-time smelting
Smelting the electrode prepared in the step 1) as a consumable electrode in a vacuum consumable electric arc furnace to obtain a primary ingot;
3) secondary smelting
Carrying out secondary smelting on the primary ingot prepared in the step 2) serving as a consumable electrode in a vacuum consumable electric arc furnace to obtain a secondary ingot;
4) three-time smelting
And 3) taking the secondary ingot prepared in the step 3) as a consumable electrode to carry out three times of smelting in a vacuum consumable arc furnace, and feeding in a step-by-step current reduction mode in the later stage of smelting to obtain a titanium alloy finished ingot.
2. The method for smelting and feeding an industrial common-specification titanium alloy ingot according to claim 1, wherein in the step 1), the intermediate alloy comprises the following components: one or more of aluminum-vanadium intermediate alloy, aluminum beans, titanium dioxide, aluminum-molybdenum intermediate alloy, sponge zirconium and titanium-silicon alloy.
3. The method for smelting and feeding the titanium alloy ingots with the industrial common specification according to claim 1, wherein in the step 2), the smelting current is 8.0-22.0 KA, the smelting voltage is 25.0-35.0V, and the arc stabilizing current is DC 8.0-15.0A.
4. The method for smelting and feeding the titanium alloy ingot commonly used in the industry according to claim 1 or 3, wherein in the step 2), the consumable electrode is inverted during charging.
5. The method for smelting and feeding the titanium alloy ingots with the industrial common specification according to claim 1, wherein in the step 3), the smelting current is 10.0-25.0 KA, the smelting voltage is 27.0-38.0V, the arc stabilizing current is AC 10.0-20.0A, and the stirring period is 15-60S.
6. The method for smelting and feeding the titanium alloy ingots with the industrial common specification according to claim 1, wherein in the step 4), the smelting current is 12.0-28.0 KA, the smelting voltage is 28.0-40.0V, the arc stabilizing current is AC 10.0-25.0A, the stirring period is 15-60S, and feeding is started when the consumable electrode is smelted for 100-400 kg.
7. The method for smelting feeding of the titanium alloy ingots with the industrial common specification according to claim 1, wherein the gradient of the smelting current along with the time is 1.2-1.5, 0.5, 0.3, 0.2, 0.05 and 0.03, the smelting voltage is reduced to 80-90% of the normal smelting stage while the current is reduced, and the arc stabilizing current is reduced to 50-60% of the normal smelting stage when the gradient of the smelting current is 0.05.
8. The method for smelting and feeding the titanium alloy ingot according to the claim 1, which is characterized by further comprising the following steps: 5) peeling off the titanium alloy finished ingot, detecting a flaw and sawing a riser.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111304463A (en) * | 2020-03-13 | 2020-06-19 | 中铝沈阳有色金属加工有限公司 | Vacuum consumable melting method of high-purity titanium cast ingot |
| CN111549244A (en) * | 2020-05-20 | 2020-08-18 | 西部超导材料科技股份有限公司 | Preparation method of Ti35 titanium alloy ingot |
| CN112609086A (en) * | 2020-11-16 | 2021-04-06 | 云南钛业股份有限公司 | Square billet for rolling large-coil-weight Ti-6Al-4V alloy wire rod at high speed and preparation method thereof |
| CN112853103A (en) * | 2020-12-30 | 2021-05-28 | 西安西工大超晶科技发展有限责任公司 | Titanium alloy recovery method |
| CN113832363A (en) * | 2021-08-18 | 2021-12-24 | 湖南金天钛业科技有限公司 | Titanium alloy ingot and preparation method thereof |
| CN115874076A (en) * | 2022-12-24 | 2023-03-31 | 西安超晶科技股份有限公司 | Preparation method of titanium-aluminum alloy ingot |
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| CN105039760A (en) * | 2015-07-27 | 2015-11-11 | 西部超导材料科技股份有限公司 | Smelting feeding method for TC4-DT titanium alloy cast ingot of phi 720-phi 1000 mm specification |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105039760A (en) * | 2015-07-27 | 2015-11-11 | 西部超导材料科技股份有限公司 | Smelting feeding method for TC4-DT titanium alloy cast ingot of phi 720-phi 1000 mm specification |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111304463A (en) * | 2020-03-13 | 2020-06-19 | 中铝沈阳有色金属加工有限公司 | Vacuum consumable melting method of high-purity titanium cast ingot |
| CN111549244A (en) * | 2020-05-20 | 2020-08-18 | 西部超导材料科技股份有限公司 | Preparation method of Ti35 titanium alloy ingot |
| CN112609086A (en) * | 2020-11-16 | 2021-04-06 | 云南钛业股份有限公司 | Square billet for rolling large-coil-weight Ti-6Al-4V alloy wire rod at high speed and preparation method thereof |
| CN112853103A (en) * | 2020-12-30 | 2021-05-28 | 西安西工大超晶科技发展有限责任公司 | Titanium alloy recovery method |
| CN113832363A (en) * | 2021-08-18 | 2021-12-24 | 湖南金天钛业科技有限公司 | Titanium alloy ingot and preparation method thereof |
| CN113832363B (en) * | 2021-08-18 | 2022-07-05 | 湖南金天钛业科技有限公司 | Titanium alloy ingot and preparation method thereof |
| CN115874076A (en) * | 2022-12-24 | 2023-03-31 | 西安超晶科技股份有限公司 | Preparation method of titanium-aluminum alloy ingot |
| CN115874076B (en) * | 2022-12-24 | 2024-05-07 | 西安超晶科技股份有限公司 | Preparation method of titanium-aluminum alloy ingot |
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