CN116463516A - Smelting method of Ti-1300F titanium alloy cast ingot - Google Patents
Smelting method of Ti-1300F titanium alloy cast ingot Download PDFInfo
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- CN116463516A CN116463516A CN202310136121.8A CN202310136121A CN116463516A CN 116463516 A CN116463516 A CN 116463516A CN 202310136121 A CN202310136121 A CN 202310136121A CN 116463516 A CN116463516 A CN 116463516A
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- smelting
- ingot
- melting
- titanium alloy
- crucible
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- 238000003723 Smelting Methods 0.000 title claims abstract description 68
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 27
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 9
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 8
- 239000000460 chlorine Substances 0.000 claims abstract description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 239000010936 titanium Substances 0.000 claims description 14
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 229910052720 vanadium Inorganic materials 0.000 claims description 7
- 238000005275 alloying Methods 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 15
- 238000007920 subcutaneous administration Methods 0.000 abstract description 10
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/20—Arc remelting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of titanium alloy smelting, and discloses a smelting method of a Ti-1300F titanium alloy cast ingot, which comprises the following steps: step 1: uniformly mixing titanium sponge and alloy elements, and preparing a consumable electrode through pressing and welding; step 2: carrying out primary smelting on the consumable electrode, wherein the smelting current is 13-16 KA, and obtaining a primary ingot; step 3: smelting the primary ingot for the second time; smelting current is 16-20 KA, and a secondary ingot is obtained; step 4: and smelting the secondary ingot for the third time, wherein the smelting current is 22-24 KA, and obtaining the Ti-1300F titanium alloy cast ingot. The invention reduces the splashing caused by excessive chlorine and water vapor in the smelting process; the temperature of the inner wall of the crucible is kept constant by adjusting the water inflow and outflow, so that the surface defect of the surface of the ingot due to chilling is improved; the molten pool is effectively promoted to the side, the gas removal in the smelting process is facilitated, and the occurrence of subcutaneous air holes is reduced; the smelting heat conduction stability is good, the solidification cooling speed is stable, the occurrence of ingot defects is reduced, and the ingot yield is high.
Description
Technical Field
The invention relates to the technical field of titanium alloy smelting, in particular to a smelting method of a Ti-1300F titanium alloy cast ingot.
Background
Ti-1300F is a composition with a designed tensile strength of more than 1300Mpa and a fracture toughness KIC of more than 60 Mpa.m 1/2 The titanium alloy material can be applied to fasteners, structural members, springs and the like in aviation, aerospace and other civil fields, and has good popularization and application prospects.
In the production process of Ti-1300F titanium alloy ingots, surface quality defects of the ingots such as subcutaneous air holes, cold stops and the like often occur, so that the skinning amount of an ingot casting machine is increased, and the yield is reduced. At present, in the field of titanium alloy ingot smelting, the smelting current is often regulated, so that the side of a molten pool is affected, the surface quality of a titanium alloy ingot is improved, the surface quality defects of the ingot such as subcutaneous pores and cold insulation are restrained, but the surface quality defects of the ingot are not effectively solved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a smelting method of a Ti-1300F titanium alloy cast ingot, which reduces the generation of subcutaneous pores and surface defects of the cast ingot, solves the problem of surface quality defects of the cast ingot and improves the yield of the cast ingot.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
A smelting method of a Ti-1300F titanium alloy cast ingot comprises the following steps:
step 1, uniformly mixing titanium sponge and alloy elements, and preparing a consumable electrode through pressing and welding;
step 2, smelting the consumable electrode for the first time, wherein the smelting current is 13-16 KA, and a primary ingot is obtained;
step 3, smelting the primary ingot for the second time; smelting current is 16-20 KA, and a secondary ingot is obtained;
and 4, smelting the secondary ingot for the third time, wherein the smelting current is 22-24 KA, and obtaining the Ti-1300F titanium alloy cast ingot.
Preferably, step 1 comprises the sub-steps of:
step 1, mixing the sponge titanium and the intermediate alloy uniformly, and pressing to obtain an electrode block with an arc-shaped cross section;
wherein the alloying elements include Al, V, fe, cr and Mo; the weight percentage of the sponge titanium and each alloy element is as follows: 3.5 to 5 percent of Al, 2.5 to 4 percent of V, 0.6 to 1.5 percent of Fe, 4.5 to 6 percent of Cr, 4 to 6 percent of Mo and the balance of Ti;
and 2, stacking the electrode blocks into cylinders, and welding to obtain the consumable electrode.
Preferably, the titanium sponge has a chlorine content of less than 0.07%.
Preferably, the smelting is vacuum consumable arc furnace smelting.
Preferably, the crucible diameter for the first melting is 500mm and the crucible ratio is 0.8.
Preferably, the crucible diameter for the second melting is 580mm and the crucible ratio is 0.85.
Preferably, the diameter of the crucible for the third smelting is 650mm, and the crucible ratio is 0.88-0.9.
Preferably, the crucible is made of T2 red copper, and the wall thickness of the crucible is 26-30 mm.
Preferably, the smelting power supply is an IGBT transistor power supply.
Preferably, in the third smelting in the step 4, the water inflow and outflow rate of the vacuum consumable arc furnace cooling system is controlled to be 110-120 t/h.
Compared with the prior art, the invention has the beneficial effects that:
the invention selects low-chlorine titanium sponge, and dries the secondary ingot before smelting the finished product, thereby reducing splash caused by excessive chlorine and water vapor in the smelting process; the temperature of the inner wall of the crucible is kept constant by adjusting the water inflow and outflow, so that the surface defect of the surface of the ingot due to chilling is improved; the reasonable crucible ratio is selected, so that the molten pool is effectively promoted to the side, the gas is discharged in the smelting process, and the occurrence of subcutaneous air holes is reduced; the smelting heat conduction stability is good, the solidification cooling speed is stable, the occurrence of ingot defects is reduced, and the ingot yield is high.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
The invention provides a smelting method of a Ti-1300F titanium alloy cast ingot, which has the advantages of less surface defects and subcutaneous air holes of the prepared Ti-1300F titanium alloy and high cast ingot yield.
Example 1
In the embodiment, a vacuum consumable arc furnace is adopted for smelting, a crucible is T2 red copper, and the wall thickness of the crucible is 26mm.
Step 1, selecting sponge titanium with chlorine content of 0.04%, uniformly mixing the sponge titanium with a master alloy, and using an oil press for pressing and a vacuum plasma welding box for welding to obtain a consumable electrode;
wherein the alloying elements include Al, V, fe, cr and Mo; the weight percentage of the sponge titanium and each alloy element is as follows: 3.5 percent of Al, 4 percent of V, 1.5 percent of Fe, 4.5 percent of Cr, 6 percent of Mo and the balance of Ti;
step 2, smelting for the first time by using a crucible with the diameter of 500mm, wherein the crucible ratio is 0.8, the smelting current is 16KA, and the smelting power supply is an IGBT transistor power supply to obtain a primary ingot;
step 3, smelting for the second time by using a crucible with the diameter of 580mm, wherein the crucible ratio is 0.85, the smelting current is 20KA, and the smelting power supply is an IGBT transistor power supply to obtain a secondary ingot;
and 4, baking the secondary ingot for three hours by using an oven, and carrying out third smelting by using a T2 red copper crucible with the diameter of 650mm after baking, wherein the crucible ratio is 0.885, the smelting current is 22KA, the smelting power supply is an IGBT transistor power supply, and the water inlet and outlet flow rate of a vacuum consumable arc furnace cooling system is controlled at 120T/h. Cooling and discharging to obtain the Ti-1300F titanium alloy cast ingot with the specification of 650 mm.
Example 2
In the embodiment, a vacuum consumable arc furnace is adopted for smelting, a crucible is T2 red copper, and the wall thickness of the crucible is 30mm.
Step 1, selecting sponge titanium with chlorine content of 0.06%, uniformly mixing the sponge titanium with a master alloy, and using an oil press for pressing and a vacuum plasma welding box for welding to obtain a consumable electrode;
wherein the alloying elements include Al, V, fe, cr and Mo; the weight percentage of the sponge titanium and each alloy element is as follows: al 5%, V2.5%, fe 0.6%, cr 6%, mo 4%, the balance being Ti;
step 2, smelting for the first time by using a crucible with the diameter of 500mm, wherein the crucible ratio is 0.8, the smelting current is 13KA, and the smelting power supply is an IGBT transistor power supply to obtain a primary ingot;
step 3, smelting for the second time by using a crucible with the diameter of 580mm, wherein the crucible ratio is 0.85, the smelting current is 16KA, and the smelting power supply is an IGBT transistor power supply to obtain a secondary ingot;
and 4, baking the secondary ingot for three hours by using an oven, and smelting a finished product for three times by using a T2 red copper crucible with the diameter of 650mm after baking, wherein the crucible ratio is 0.9, the smelting current is 24KA, the smelting power supply is an IGBT transistor power supply, and the water inlet and outlet flow rate of a vacuum consumable arc furnace cooling system is 110T/h. Cooling and discharging to obtain the Ti-1300F titanium alloy cast ingot with the specification of 650 mm.
In example 1, three Ti-1300F titanium alloy ingots were obtained, and the three ingots had few surface defects such as subcutaneous pores and cold shut, and the average yield of the ingots after skinning was 97%, as shown in Table 1; the yield of the Ti-1300F titanium alloy cast ingot in the prior method is 96.5 percent.
Table 1 yield of three Ti-1300F titanium alloy ingots of example 1
In example 2, three Ti-1300F titanium alloy ingots were obtained, and the three ingots had few surface defects such as subcutaneous pores and cold shut, and the average yield of the ingots after skinning was 97.3%, as shown in Table 2; the yield of the Ti-1300F titanium alloy cast ingot in the prior method is 96.5 percent.
Table 2 yield of three Ti-1300F titanium alloy ingots of example 2
As is clear from tables 1 and 2, the Ti-1300F titanium alloy ingots obtained by the method for melting Ti-1300F titanium alloy ingots according to the present invention have few surface defects such as subcutaneous air holes and cold stops, and the average yields of the Ti-1300F titanium alloy ingots of example 1 and example 2 are 97% and 97.3%, respectively, which are higher than the yields of the ingots obtained by the conventional methods by 96.5%.
In the invention, a reasonable crucible ratio is selected during smelting, so that the molten pool is effectively promoted to the side, the gas removal in the smelting process is facilitated, and the occurrence of subcutaneous air holes is reduced; the T2 red copper crucible is adopted, so that the smelting heat conduction stability is good, the solidification and cooling speed is stable, the occurrence of ingot defects is reduced, and the yield of the ingot is improved.
Drying the secondary ingot before the third smelting, and reducing splashing caused by excessive chlorine and water in the smelting process; in the third smelting process, the temperature of the inner wall of the crucible is kept constant by adjusting the water inlet and outlet flow, so that the surface defect of the surface of the ingot due to chilling is improved, and the yield of the ingot is further improved.
While the invention has been described in detail in this specification with reference to the general description and the specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (10)
1. The smelting method of the Ti-1300F titanium alloy cast ingot is characterized by comprising the following steps of:
step 1, uniformly mixing titanium sponge and alloy elements, and preparing a consumable electrode through pressing and welding;
step 2, smelting the consumable electrode for the first time, wherein the smelting current is 13-16 KA, and a primary ingot is obtained;
step 3, smelting the primary ingot for the second time; smelting current is 16-20 KA, and a secondary ingot is obtained;
and 4, smelting the secondary ingot for the third time, wherein the smelting current is 22-24 KA, and obtaining the Ti-1300F titanium alloy cast ingot.
2. The method of melting a Ti-1300F titanium alloy ingot of claim 1, wherein step 1 comprises the sub-steps of:
step 1, mixing the sponge titanium and the intermediate alloy uniformly, and pressing to obtain an electrode block with an arc-shaped cross section;
wherein the alloying elements include Al, V, fe, cr and Mo; the weight percentage of the sponge titanium and each alloy element is as follows: 3.5 to 5 percent of Al, 2.5 to 4 percent of V, 0.6 to 1.5 percent of Fe, 4.5 to 6 percent of Cr, 4 to 6 percent of Mo and the balance of Ti;
and 2, stacking the electrode blocks into cylinders, and welding to obtain the consumable electrode.
3. The method of melting a Ti-1300F titanium alloy ingot according to claim 1 or 2, wherein the chlorine content of the titanium sponge is less than 0.07%.
4. The method of melting a Ti-1300F titanium alloy ingot of claim 1, wherein the melting is a vacuum consumable arc furnace melting.
5. The method of melting a Ti-1300F titanium alloy ingot according to claim 1, wherein the crucible diameter for the first melting is 500mm and the crucible ratio is 0.8.
6. The method for melting a Ti-1300F titanium alloy ingot according to claim 1, wherein the crucible diameter for the second melting is 580mm and the crucible ratio is 0.85.
7. The method for melting a Ti-1300F titanium alloy ingot according to claim 1, wherein the crucible diameter for the third melting is 650mm, and the crucible ratio for the third melting is 0.88 to 0.9.
8. The method for melting a Ti-1300F titanium alloy ingot according to claim 1, wherein the crucible is made of T2 red copper, and the crucible wall thickness is 26-30 mm.
9. The method of melting a Ti-1300F titanium alloy ingot of claim 1, wherein the melting power source is an IGBT transistor power source.
10. The method for melting a Ti-1300F titanium alloy ingot according to claim 4, wherein the water inflow and outflow rate of the vacuum consumable arc furnace cooling system is controlled to be 110-120 t/h in the third melting in the step 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310136121.8A CN116463516A (en) | 2023-02-20 | 2023-02-20 | Smelting method of Ti-1300F titanium alloy cast ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310136121.8A CN116463516A (en) | 2023-02-20 | 2023-02-20 | Smelting method of Ti-1300F titanium alloy cast ingot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116463516A true CN116463516A (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310136121.8A Pending CN116463516A (en) | 2023-02-20 | 2023-02-20 | Smelting method of Ti-1300F titanium alloy cast ingot |
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| Country | Link |
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| CN (1) | CN116463516A (en) |
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2023
- 2023-02-20 CN CN202310136121.8A patent/CN116463516A/en active Pending
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