CN117926078A - Rolled TC4 alloy containing bismuth and scandium and preparation process thereof - Google Patents
Rolled TC4 alloy containing bismuth and scandium and preparation process thereof Download PDFInfo
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- CN117926078A CN117926078A CN202410107611.XA CN202410107611A CN117926078A CN 117926078 A CN117926078 A CN 117926078A CN 202410107611 A CN202410107611 A CN 202410107611A CN 117926078 A CN117926078 A CN 117926078A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 86
- 239000000956 alloy Substances 0.000 title claims abstract description 86
- 229910052797 bismuth Inorganic materials 0.000 title claims abstract description 41
- 229910052706 scandium Inorganic materials 0.000 title claims abstract description 39
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 title claims abstract description 36
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 18
- 238000005096 rolling process Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000003723 Smelting Methods 0.000 claims abstract description 20
- 239000010936 titanium Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 239000002994 raw material Substances 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000001953 recrystallisation Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- KBHOHOGVOAJYGL-UHFFFAOYSA-N [Sc].[Bi] Chemical compound [Sc].[Bi] KBHOHOGVOAJYGL-UHFFFAOYSA-N 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 abstract description 13
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 5
- 239000006104 solid solution Substances 0.000 abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000009864 tensile test Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- -1 Titanium aluminum vanadium Chemical compound 0.000 description 3
- 229910000756 V alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
- C22C14/00—Alloys based on titanium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- 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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of titanium alloy, and in particular discloses a rolled TC4 alloy containing bismuth and scandium and a preparation process thereof, wherein the alloy comprises the following components in percentage by weight: al:5.0 to 7.0 weight percent, V:3.5 to 4.5 weight percent, bi:0.5 to 1.5 weight percent, sc:0.3 to 0.8 weight percent, and the balance of Ti. The alloy preparation process comprises three steps of alloy smelting, rolling treatment and post heat treatment. The alloy strengthening and toughening mechanism mainly depends on solid solution strengthening of elements such as V, al, bi and the like, second phase strengthening of Al 3 Sc, fine grain strengthening and the like. The preparation process of the alloy is simple, the production efficiency is high, the alloy is suitable for large casting production, and the rolled TC4 alloy containing bismuth and scandium prepared by the process is high in strength and good in plasticity.
Description
Technical Field
The invention belongs to the technical field of titanium alloy, and particularly relates to a rolled TC4 alloy containing bismuth and scandium and a preparation process thereof.
Background
Titanium aluminum vanadium alloy (TC 4 alloy) is used as a titanium alloy system with optimal potential, and is widely used in various fields, in particular in the technical fields of aerospace, military industry, traffic and the like due to the characteristics of high strength, good corrosion resistance, high heat resistance and the like. The toughening of the titanium-aluminum-vanadium alloy is an important problem of scientific attention at present, and the fine-grain strengthening effect can be realized through solid solution strengthening of elements such as Al, V and the like, rolling treatment or additive manufacturing and other technologies, so that the alloy strength is improved, and meanwhile, higher plasticity is ensured.
In the prior art, chinese patent inventions with publication numbers of CN114774819A and CN112238152A respectively disclose a heat treatment process of TC4 alloy castings and a preparation process of wide-width ultra-thick TC4 titanium alloy plates, and the purpose of the method is to improve the performance of TC4 alloy.
Based on the above disclosed technology, the inventors found that, to further improve the alloy performance, adding Bi and Sc elements into the titanium-aluminum-vanadium alloy, by utilizing the characteristic that the atomic radius of Bi is smaller than that of Al and V, a further solid solution strengthening effect can be achieved, and at the same time, adding Sc element can form a trace amount of Al 3 Sc phase in addition to the solid solution strengthening effect, and the strength performance of the alloy is improved by a multi-element strengthening mechanism. At present, the method has not been reported in the preparation process of titanium alloy.
Disclosure of Invention
The present invention aims to solve one of the technical problems in the related art at least to some extent. Therefore, the invention aims to provide the rolled TC4 alloy containing bismuth and scandium and the preparation process thereof, and the TC4 alloy prepared by the process can improve the plasticity and strength of the alloy to a great extent, so that the requirements of the technical fields of aerospace, military industry, traffic and the like can be met.
In one aspect of the invention, the invention provides the following technical scheme:
The rolled TC4 alloy containing bismuth and scandium comprises the following components in percentage by weight:
Al：5.0～7.0wt％；
V：3.5～4.5wt％；
Bi：0.5～1.5wt％；
Sc：0.3～0.8wt％；
the balance being Ti and impurities.
Preferably, the alloy comprises the following components in percentage by weight:
Al：6.0wt％；
V：4.0wt％；
Bi：0.8wt％；
Sc：0.8wt％；
the balance being Ti and impurities.
In another aspect of the present invention, the present invention provides a process for preparing a rolled TC4 alloy containing bismuth and scandium, for preparing the rolled TC4 alloy containing bismuth and scandium, comprising the steps of:
S1, weighing metal raw materials according to the components in the alloy and the mass percentages thereof;
Step S2, the weighed metal raw materials are subjected to briquetting treatment through a press machine at normal temperature to form metal raw material electrode blocks with the density of 3.0-3.2 g/cm 2;
S3, taking a crucible, drying and cleaning the crucible and the metal raw material electrode block obtained in the step 2, putting the dried and cleaned metal raw material electrode block into the crucible, and putting the crucible containing the metal raw material electrode block into an ingot furnace to finish one-time smelting to obtain an ingot;
Step S4, cleaning the cast ingot obtained by the primary smelting in the step 3, and repeating the process in the step S3 for secondary smelting and tertiary smelting after cleaning so as to ensure the uniformity of alloy components;
s5, mechanically removing the oxide on the surface of the cast ingot obtained in the step S4;
s6, cutting the cast ingot processed in the step S5 into blanks with a certain size, rolling, and water-cooling after rolling to obtain a rolled alloy;
S7, performing heat treatment on the rolled alloy rolled in the step S6, then performing dynamic recrystallization treatment under the protection of inert gas, further performing beta-phase transformation treatment, and then performing furnace cooling treatment;
And S8, performing stress relief treatment on the rolled alloy processed in the step S7 to obtain the rolled TC4 alloy containing bismuth and scandium.
Preferably, in the step S1, the metal raw material is high-purity Al particles, high-purity Bi, ti-20V master alloy, al-20Sc master alloy, or titanium sponge.
Preferably, in step S2, the metal raw material is pressed into a metal raw material electrode block having a density of 3.0 to 3.2g/cm 2.
Preferably, in step S3, the ingot furnace is a vacuum consumable electrode arc furnace, a crucible containing electrode blocks of metal raw materials is placed in the vacuum consumable electrode arc furnace, the vacuum consumable electrode arc furnace is vacuumized, a consumable electrode and an auxiliary electrode are welded, and an electric arc is ignited for smelting; and after smelting, cooling to 300 ℃, and opening the vacuum consumable electrode arc furnace to take out the cast ingot.
Preferably, in step S6, the ingot is cut into a billet of 60mm by 40mm by 30mm and subjected to a rolling process.
Preferably, in the step S6, the temperature is kept for 1h at 950 ℃ before rolling, the rolling temperature is 950 ℃, the rolling is carried out in 4-pass continuous rolling, the single rolling ratio is 70%, and water cooling is carried out after finishing rolling.
Preferably, in step S7, the temperature of the dynamic recrystallization treatment is 950 ℃, and the dynamic recrystallization treatment is water-cooled after heat preservation for 30min.
Preferably, in step S7, the β -phase transition temperature is 1150 ℃ and the holding time is 60min.
The invention has the beneficial effects that:
The alloy preparation process provided by the invention comprises three steps of alloy smelting, rolling treatment and post heat treatment. The alloy strengthening and toughening mechanism mainly depends on solid solution strengthening of elements such as Sc, bi and the like, second-phase strengthening of Al 3 Sc, fine-grain strengthening and the like. The preparation process of the alloy is simple, the production efficiency is high, the alloy is suitable for large casting production, and the rolled TC4 alloy containing bismuth and scandium prepared by the process is high in strength and good in plasticity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a preparation process in an embodiment of the invention;
FIG. 2 is a diagram showing a scanning structure of TC4 alloy in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The rolled TC4 alloy containing bismuth scandium according to the present invention and its production process will be described below with reference to fig. 1 and 2 in conjunction with fig. 1 and 2.
Example 1:
the embodiment 1 of the invention provides a rolled TC4 alloy containing bismuth and scandium, which comprises the following components in percentage by weight:
Al:5.0wt%; v:3.5wt%; bi:0.5wt%; sc:0.3wt%; the balance being Ti.
A preparation process of rolled TC4 alloy containing bismuth and scandium comprises the following steps:
and step S1, weighing the metal raw material according to the weight percentage of 5.0 percent of Al,3.5 percent of V,0.5 percent of Sc,0.3 percent of Bi and the balance of Ti.
In some embodiments, the metallic starting material used is high purity Al particles, high purity Bi, ti-20V master alloy, al-20Sc master alloy, titanium sponge.
And S2, carrying out briquetting treatment on the metal raw materials at normal temperature through a press machine to form the metal raw material electrode block with certain strength and density.
In some embodiments, the metal feedstock is pressed into metal feedstock electrode blocks having a density of 3.0 to 3.2g/cm 2, preferably a density of 3.0g/cm 2.
And S3, taking a crucible, drying and cleaning the crucible and the metal raw material electrode block obtained in the step 2, putting the dried and cleaned metal raw material electrode block into the crucible, and putting the crucible containing the metal raw material electrode block into an ingot furnace to finish one-time smelting.
In some embodiments, the ingot furnace is a vacuum consumable electrode arc furnace, a crucible containing electrode blocks of metal raw materials is placed in the vacuum consumable electrode arc furnace, the vacuum consumable electrode arc furnace is vacuumized, a consumable electrode and an auxiliary electrode are welded, and an electric arc is ignited for smelting; and after smelting, cooling to 300 ℃, and opening the vacuum consumable electrode arc furnace to take out the cast ingot.
And S4, cleaning the cast ingot obtained by the primary smelting in the step 3, and repeating the process in the step S3 for secondary smelting and tertiary smelting after cleaning so as to ensure the uniformity of alloy components.
And S5, mechanically removing the oxide on the surface of the cast ingot obtained in the step S4.
And S6, cutting the cast ingot processed in the step S5 into blanks with a certain size, rolling, and water-cooling after rolling to obtain the rolled alloy.
In some embodiments, the ingot is cut into 60mm x 40mm x 30mm billets for a rolling process.
In some embodiments, the temperature is maintained at 950 ℃ for 1 hour prior to rolling.
In some embodiments, the rolling temperature is 950 ℃, the rolling is performed in 4 passes of continuous rolling, the single rolling ratio is 70%, and water cooling is performed after finishing rolling.
And S7, performing heat treatment on the rolled alloy rolled in the step S6, performing dynamic recrystallization treatment under the protection of inert gas, further performing beta-phase transformation treatment, and then performing furnace cooling treatment.
In some embodiments, the inert gas is Ar gas.
In some embodiments, in step S7, the temperature of the dynamic recrystallization treatment is 950 ℃, and the water cooling is performed after 30min of heat preservation.
In some embodiments, in step S7, the beta phase transition temperature is 1150 ℃ and the incubation time is 60min.
And S8, performing stress relief treatment on the rolled alloy processed in the step S7, and preserving the temperature at 300 ℃ for 3 hours to finish the stress relief treatment, thereby obtaining the rolled TC4 alloy containing bismuth and scandium.
The rolled TC4 alloy containing bismuth and scandium prepared by the process is subjected to tensile test, the test results of 3 effective tensile tests are averaged, and the tensile strength of the alloy is 845.4MPa and the elongation after break is 17.4%.
Example 2:
The embodiment 2 of the invention provides a rolled TC4 alloy containing bismuth and scandium, which comprises the following components in percentage by weight:
al:5.0wt%; v:4.5wt%; bi:1.0wt%; sc:0.5wt%; the balance being Ti.
The preparation process of the rolled TC4 alloy containing bismuth and scandium adopts the same steps and process parameters as those of the preparation process in the embodiment 1, except that in the step S7, the beta phase transformation treatment temperature is 1100 ℃, and the heat preservation time is 60min. Other steps and processes that are the same are not described in detail herein.
The rolled TC4 alloy containing bismuth and scandium prepared by the process is subjected to tensile test, the test results of 3 times of effective tensile tests are averaged, and the tensile strength and the elongation after break of the alloy are measured to be 849.2MPa and 17.3%.
Example 3:
The embodiment 3 of the invention provides a rolled TC4 alloy containing bismuth and scandium, which comprises the following components in percentage by weight:
al:6.0wt%; v:4.0wt%; bi:0.8wt%; sc:0.8wt%; the balance being Ti.
The preparation process of the rolled TC4 alloy containing bismuth and scandium adopts the process steps and the process parameters which are completely the same as those of the embodiment 2, and the description is omitted here.
The rolled TC4 alloy containing bismuth and scandium prepared by the process is subjected to tensile test, the test results of 3 effective tensile tests are averaged, and the tensile strength of the alloy is 859.9MPa and the elongation after breaking is 16.9%.
Example 4:
the embodiment 4 of the invention provides a rolled TC4 alloy containing bismuth and scandium, which comprises the following components in percentage by weight:
Al:6.0wt%; v:4.5wt%; bi:1.0wt%; sc:0.5wt%; the balance being Ti.
The preparation process of the rolled TC4 alloy containing bismuth and scandium adopts the process steps and the process parameters which are completely the same as those of the embodiment 2, and the description is omitted here.
The rolled TC4 alloy containing bismuth and scandium prepared by the process is subjected to tensile test, the test results of 3 effective tensile tests are averaged, and the tensile strength of the alloy is 867.1MPa and the elongation after break is 15.1%.
Example 5:
the embodiment 5 of the invention provides a rolled TC4 alloy containing bismuth and scandium, which comprises the following components in percentage by weight:
Al:7.0wt%; v:4.0wt%; bi:1.5wt%; sc:0.8wt%; the balance being Ti.
The preparation process of the rolled TC4 alloy containing bismuth and scandium adopts the process steps and the process parameters which are completely the same as those of the embodiment 1, and the description is omitted here.
The rolled TC4 alloy containing bismuth and scandium prepared by the process is subjected to tensile test, the test results of 3 effective tensile tests are averaged, and the tensile strength of the alloy is 873.5MPa and the elongation after break is 15.8%.
The specific components and process parameters of the above examples 1 to 5 are shown in Table 1:
TABLE 1
The technical effects and advantages of the present invention are detailed in the summary section and are not further described herein.
The present invention is not limited to the conventional technical means known to those skilled in the art.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (9)
1. The rolled TC4 alloy containing bismuth and scandium is characterized by comprising the following components in percentage by weight:
Al：5.0～7.0wt%；
V：3.5～4.5wt%；
Bi：0.5～1.5wt%；
Sc：0.3～0.8wt%；
the balance being Ti and impurities.
2. The rolled TC4 alloy containing bismuth and scandium according to claim 1 wherein the alloy comprises the following components in weight percent:
Al：6.0wt%；
V：4.0wt%；
Bi：0.8wt%；
Sc：0.8wt%；
the balance being Ti and impurities.
3. A process for preparing a rolled TC4 alloy containing bismuth and scandium, which is used for preparing the rolled TC4 alloy containing bismuth and scandium according to claim 1 or 2, and is characterized by comprising the following steps:
S1, weighing metal raw materials according to the components in the alloy and the mass percentages thereof;
Step S2, carrying out briquetting treatment on the weighed metal raw materials at normal temperature to form metal raw material electrode blocks with the density of 3.0-3.2 g/cm 2;
S3, taking a crucible, drying and cleaning the crucible and the metal raw material electrode block obtained in the step 2, putting the dried and cleaned metal raw material electrode block into the crucible, and putting the crucible containing the metal raw material electrode block into an ingot furnace to finish one-time smelting to obtain an ingot;
Step S4, cleaning the cast ingot obtained by the primary smelting in the step 3, and repeating the process in the step S3 for secondary smelting and tertiary smelting after cleaning so as to ensure the uniformity of alloy components;
s5, mechanically removing the oxide on the surface of the cast ingot obtained in the step S4;
S6, cutting the cast ingot processed in the step S5 into a blank, rolling, and water-cooling after rolling to obtain a rolled alloy;
S7, performing heat treatment on the rolled alloy rolled in the step S6, then performing dynamic recrystallization treatment under the protection of inert gas, further performing beta-phase transformation treatment, and then performing furnace cooling treatment;
And S8, performing stress relief treatment on the rolled alloy processed in the step S7 to obtain the rolled TC4 alloy containing bismuth and scandium.
4. The process for producing a rolled TC4 alloy containing bismuth and scandium according to claim 3 wherein in step S1 said metal starting material is high purity Al particles, high purity Bi, ti-20V master alloy, al-20Sc master alloy, titanium sponge.
5. The process for preparing bismuth-scandium-containing rolled TC4 alloy according to claim 3, wherein in step S3, a vacuum consumable electrode arc furnace is selected as the ingot furnace, a crucible containing electrode blocks of metal raw materials is placed into the vacuum consumable electrode arc furnace, the vacuum consumable electrode arc furnace is vacuumized, a consumable electrode and an auxiliary electrode are welded, and an electric arc is ignited for smelting; and after smelting, cooling to 300 ℃, and opening the vacuum consumable electrode arc furnace to take out the cast ingot.
6. The process for producing a rolled TC4 alloy containing bismuth and scandium according to claim 3 wherein in step S6, said ingot is cut into billets 60mm by 40mm by 30mm and subjected to a rolling process.
7. The process for producing a rolled TC4 alloy containing bismuth and scandium according to claim 6, wherein in step S6, the temperature is maintained for 1 hour at 950 ℃ before rolling, the rolling temperature is 950 ℃, the rolling is performed in 4 continuous passes, the single rolling ratio is 70%, and water cooling is performed after finishing the rolling.
8. The process for producing a rolled TC4 alloy containing bismuth and scandium according to claim 3 wherein in step S7, the temperature of said dynamic recrystallization treatment is 950 ℃, and water cooling is performed after 30 minutes of heat preservation.
9. The process for producing a bismuth scandium-containing rolled TC4 alloy according to claim 8, wherein in step S7, said β phase transition temperature is 1150 ℃ and holding time is 60min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410107611.XA CN117926078A (en) | 2024-01-26 | 2024-01-26 | Rolled TC4 alloy containing bismuth and scandium and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410107611.XA CN117926078A (en) | 2024-01-26 | 2024-01-26 | Rolled TC4 alloy containing bismuth and scandium and preparation process thereof |
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