CN116949317A - Near alpha high temperature titanium alloy with use temperature of 680 ℃ and preparation method thereof - Google Patents
Near alpha high temperature titanium alloy with use temperature of 680 ℃ and preparation method thereof Download PDFInfo
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- CN116949317A CN116949317A CN202310947450.0A CN202310947450A CN116949317A CN 116949317 A CN116949317 A CN 116949317A CN 202310947450 A CN202310947450 A CN 202310947450A CN 116949317 A CN116949317 A CN 116949317A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 43
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 41
- 238000005242 forging Methods 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000010936 titanium Substances 0.000 claims abstract description 12
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 10
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000006104 solid solution Substances 0.000 claims abstract description 8
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052718 tin Inorganic materials 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 5
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000005498 polishing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 4
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
-
- 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
- C22F1/16—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
Abstract
The invention relates to a near alpha high temperature titanium alloy suitable for 680 ℃, which comprises the following components in percentage by mass: 5.4 to 6.5 percent of Al, 3.0 to 4.3 percent of Sn, 2.5 to 4.9 percent of Zr, 0.4 to 1.2 percent of Mo, 0.4 to 0.8 percent of Si, 0.2 to 1.1 percent of Nb, 0.2 to 1.6 percent of Ta, 2.0 to 2.5 percent of W, 0.06 to 0.1 percent of C, the balance of Ti and unavoidable impurities. The preparation method comprises the steps of (1) weighing intermediate alloy raw materials according to alloy components to manufacture electrodes, and smelting by adopting a vacuum consumable furnace to obtain alloy ingots; (2) Performing surface polishing and forging treatment on the alloy cast ingot obtained in the step (1) to obtain a forging; (3) And (3) sequentially carrying out solid solution and aging treatment on the forging obtained in the step (2). According to the invention, by designing the alloy elements, adding the beta stabilizing elements and the W elements of high Al, zr and Sn neutral elements, nb, mo and Ta, the titanium alloy is reinforced in an alloy multi-element mode, so that the strength and creep resistance of the titanium alloy are ensured, and meanwhile, the brittleness of the titanium alloy is avoided.
Description
Technical Field
The invention relates to titanium alloy preparation, in particular to near alpha high temperature titanium alloy with the use temperature of 680 ℃ and a preparation method thereof.
Background
The titanium alloy has excellent performances of low density, high specific strength, high creep and the like, replaces steel or other high-temperature alloys, can lighten the quality of an aeroengine, improves the thrust-weight ratio of the engine, and is widely applied to the field of military industry such as aerospace and the like. In the 50 s of the 20 th century, the U.S. developed a TC4 titanium alloy with a service temperature of 350 ℃, which was the first high temperature titanium alloy in the world, and since then opened the research history of high temperature titanium alloys. However, the TC4 titanium alloy has poor heat resistance, the service temperature is generally 400-600 ℃, and the performance of the TC4 titanium alloy can not meet the requirements of the high-precision fields such as aerospace, ocean development and the like.
Under such a large environment, high temperature titanium alloys having a service temperature of 500 ℃, 550 ℃ and 600 ℃ have been developed successively. Among them, the alloys working at 500 ℃ are TC9, TC11 and TA15, the alloys working at 550 ℃ are Ti55, and the alloys working at 600 ℃ are Ti60 and Ti600.
With the rapid development of aviation industry, the speed of an aerospace vehicle is continuously improved, when an engine part is operated, the service temperature of the titanium alloy part can reach 650 ℃ instantly and even higher due to the influence of the thermal effect of gas, the high-temperature creep resistance and oxidation resistance of the part can be greatly reduced, and the indexes such as the tensile strength, the durability, the creep resistance and the stability of the titanium alloy can not meet the use requirements, which is the technical bottleneck for restricting the further improvement of the long-term service temperature of the titanium alloy at present.
Aiming at the problems, the high temperature resistance of the titanium alloy by scientific researchers is continuously improved. The Ti65 titanium alloy developed by Beijing aviation materials institute of China national academy of sciences and metal institute, bao Ti group improves the oxidation resistance of the alloy by adding 0.3-3.4% of Ta element, but the elongation is only between 10-20% when the tensile strength of the alloy exceeds 650MPa in 650 ℃. The northwest nonferrous metal institute developed a high temperature titanium alloy suitable for use at 650 ℃ and a method of preparing the same (patent CN 110484774A). In general, research on high-temperature titanium alloy above 600 ℃ in China is still in a starting stage, and practical application on domestic aeroengines is not yet obtained.
Disclosure of Invention
The invention aims to solve the technical problem of providing the near alpha high-temperature titanium alloy with the service temperature of 680 ℃ so that the grains of the titanium alloy are finer and more uniform, thereby improving the service performance of high-temperature mechanics of materials and solving the problems of poor strength and insufficient oxidation resistance of the existing titanium alloy when the existing titanium alloy works above 600 ℃.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the near alpha high temperature titanium alloy suitable for 680 ℃ comprises the following components in percentage by mass: 5.4 to 6.5 percent of Al, 3.0 to 4.3 percent of Sn, 2.5 to 4.9 percent of Zr, 0.4 to 1.2 percent of Mo, 0.4 to 0.8 percent of Si, 0.2 to 1.1 percent of Nb, 0.2 to 1.6 percent of Ta, 2.0 to 2.5 percent of W, 0.06 to 0.1 percent of C, the balance of Ti and unavoidable impurities.
The preparation method of the near alpha high temperature titanium alloy with the use temperature of 680 ℃ comprises the following steps:
(1) According to alloy composition calculation, weighing sponge iron and intermediate alloy raw materials to manufacture electrodes, and smelting by adopting a vacuum consumable furnace to obtain alloy cast ingots;
(2) Performing surface polishing and forging treatment on the alloy cast ingot obtained in the step (1) to obtain a forging;
(3) And (3) sequentially carrying out solid solution and aging treatment on the forging obtained in the step (2).
In the step (1), the master alloy raw materials comprise AlSn50, alNb60, tiTa15, sponge zirconium, alSi50, alMo60, alW10, aluminum beans and carbon powder.
The granularity of the titanium sponge particles is 0.80-12.0 mm.
The intermediate alloy raw materials are all granular, and the granularity is 0.25-6.00 mm.
In the step (1), the electrode is manufactured: placing the intermediate alloy raw materials into a mixer for clockwise uniform stirring, wherein the single mixing time is 5-8 min; after mixing, blank pressing is carried out, the pressing pressure is 20-60 MPa, a plurality of cylindrical blanks are pressed, and the two cylindrical blanks are welded into one by argon arc welding and serve as primary smelting electrodes.
In the step (1), the vacuum degree of the vacuum consumable electrode furnace is less than or equal to 1.0Pa, the current is 3.5-5 kA, and the voltage is 20-35V.
In the step (2), the riser and the bottom of the alloy ingot are cut off, and the ingot is placed in a high-temperature furnace for heating and preserving heat for 3-5 hours at 1100-1200 ℃ before forging; and (3) carrying out three upsetting and three drawing on the cast ingot, returning to the furnace for heat preservation for 30-50 min after each upsetting and drawing, wherein the total deformation of upsetting is 25-45%, and the deformation of drawing is 15-35%, so as to obtain the forging.
In the step (3), the solid solution temperature is 1025-1060 ℃, and the water cooling is carried out after heat preservation for 2-3 hours; the aging temperature is 750-880 ℃, and air cooling is carried out after heat preservation for 6-8 hours.
The argon arc welding adopts pure titanium welding wires.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, by designing alloy elements, adding high Al, zr, sn neutral elements, nb, mo and Ta beta stable elements and W elements, strengthening the titanium alloy in an alloy multi-element mode, improving the high-temperature strength of the titanium alloy, refining grains by the added W elements, ensuring the strength and creep resistance of the titanium alloy, avoiding brittleness of the titanium alloy, and improving the processing plasticity of the titanium alloy, the invention is characterized in that: the head and the tail of the cast ingot are not molten pool, and the surface of the cast ingot after the low-power corrosion is in a fuzzy crystal state; the blank cracking phenomenon does not occur in the repeated furnace returning forging process.
2. After the high-temperature titanium alloy prepared by the method is subjected to solution aging treatment, the crystal grains of the alloy material are relatively uniform on the microcosmic scale, and the high-temperature titanium alloy is an obvious equiaxial structure; the addition of W element in macro process makes the alloy material possess improved high temperature performance, alpha phase grow fully during ageing, prolonged and widened, and reduced residual beta phase between crystals, which is unfavorable for raising alloy strength, and has tensile strength not lower than 672MPa and elongation not lower than 16.8% at 680 deg.c.
Drawings
FIG. 1 is a cross-sectional structure morphology diagram of a near alpha high temperature titanium alloy according to example 6 of the present invention.
FIG. 2 is a graph showing the morphology of the longitudinal section of the near alpha high temperature titanium alloy in example 6 of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The near alpha high temperature titanium alloy suitable for 680 ℃ comprises the following components in percentage by mass: 5.4 to 6.5 percent of Al, 3.0 to 4.3 percent of Sn, 2.5 to 4.9 percent of Zr, 0.4 to 1.2 percent of Mo, 0.4 to 0.8 percent of Si, 0.2 to 1.1 percent of Nb, 0.2 to 1.6 percent of Ta, 2.0 to 2.5 percent of W, 0.06 to 0.1 percent of C, the balance of Ti and unavoidable impurities.
The preparation method of the near alpha high temperature titanium alloy with the use temperature of 680 ℃ comprises the following steps:
(1) Preparing an electrode by weighing sponge titanium and intermediate alloy raw materials according to alloy component calculation, wherein the intermediate alloy raw materials comprise AlSn50, alNb60, tiTa15, sponge zirconium, alSi50, alMo60, alW, aluminum beans and carbon powder, the sponge titanium is granular, and the granularity is 0.80-12.0 mm; the intermediate alloy raw materials are all granular, and the granularity is 0.25-6.00 mm.
Electrode manufacturing: placing the intermediate alloy raw materials into a mixer for clockwise uniform stirring, wherein the single mixing time is 5-8 min; after mixing, blank pressing is carried out, the pressing pressure is 20-60 MPa, a plurality of cylindrical blanks are pressed, the two cylindrical blanks are welded into one piece by adopting a pure titanium welding wire and an argon arc welding process, and are used as primary smelting electrodes, smelting is carried out by adopting a vacuum consumable furnace, the vacuum degree of the vacuum consumable furnace is less than or equal to 1.0Pa, the current is 3.5-5 kA, and the voltage is 20-35V, so that alloy cast ingots are obtained;
(2) Cutting off a riser and the bottom of the alloy ingot in the step (1), and placing the ingot in a high-temperature furnace for heating and preserving heat for 3-5 hours at 1100-1200 ℃ before forging; and (3) carrying out three upsetting and three drawing on the cast ingot, returning to the furnace for heat preservation for 30-50 min after each upsetting and drawing, wherein the total deformation of upsetting is 25-45%, and the deformation of drawing is 15-35%, so as to obtain the forging.
(3) And (3) sequentially carrying out solid solution and aging treatment on the forging obtained in the step (2). The solid solution temperature is 1025-1060 ℃, and the water cooling is carried out after heat preservation for 2-3 hours; the aging temperature is 750-880 ℃, and air cooling is carried out after heat preservation for 6-8 hours.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention. In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
In order to make the purposes, technical schemes and technical effects of the invention clearer, the technical schemes in the embodiments of the invention are clearly and completely described. The embodiments described below are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without the benefit of the teachings of this invention, are intended to be within the scope of the invention.
Example 1
The near alpha high temperature titanium alloy suitable for 680 ℃ comprises the following components in percentage by mass: 5.7% Al, 3.9% Sn, 4.8% Zr, 0.8% Mo, 0.6% Si, 0.5% Nb, 1.2% Ta, 2.0% W, 0.06% C, the balance Ti and unavoidable impurities.
The preparation method comprises the following steps:
1) Smelting
Selecting master alloy raw material particles comprising AlSn50, alNb60, tiTa15, zirconium sponge, alSi50, alMo60, alW, aluminum beans and carbon powder; adding titanium sponge particles, proportioning materials according to the chemical components of the alloy, and uniformly stirring clockwise in a mixer for 7min; when the electrode is pressed, the pressing standard is carried out according to the operation regulations of a laboratory, the pressing pressure is 55MPa, the mixed materials are pressed to obtain 12 cylindrical blanks, each 12kg of blank is divided into two groups of 6 blanks, each group of cylindrical blanks is welded into one piece by using a manual argon arc welding mode and used as a primary smelting electrode, and two primary electrodes are required to be prepared for each smelting; high vacuum smelting is carried out in a VAR furnace, the vacuum degree pumped into a hearth is 1.0Pa, the current is 4.5kA, and the voltage is 35V.
2) Forging
According to the technical requirements in national standard GB/T38917-2020, carrying out an alloy ingot casting forging process on a free forging oil press, wherein the specific implementation conditions are as follows:
(1) Fire: heating at 1100 ℃, preserving heat for 4 hours, and drawing three upsets to 280X 280mm of square billets, wherein the final forging temperature is more than or equal to 900 ℃;
(2) Two fires: heating at 1120 ℃, preserving heat for 50min, and drawing three upsets to 230 multiplied by 540mm to obtain square billets, wherein the final forging temperature is more than or equal to 920 ℃;
(3) Three fires: heating at 1120 ℃, preserving heat for 1h, and drawing three upsets to a round bar phi 150 multiplied by 150mm, wherein the final forging temperature is more than or equal to 920 ℃. The total deformation after forging is 65%, the blank is not allowed to fall to the ground before being transported to a press, and the blank is upset while being rotated in the forging process.
4) Heat treatment of
The temperature of the solid solution treatment of the forging is 1055 ℃, and the forging is water-cooled after heat preservation for 3 hours; the aging temperature is 780 ℃, the air cooling is carried out after the heat preservation is carried out for 8 hours, and the prepared near alpha high temperature titanium alloy has the tensile strength of 672MPa and the elongation of 16.8 percent in 680 ℃.
Examples 2 to 6
The process flows of examples 2 to 6 are the same as in example 1, except that: the mass percentages of Mo and Si in the components are different, and are shown in the table 1; the results of the high temperature tensile strength at 680℃and the elongation of examples 1 to 6 under the same heat treatment process are shown in Table 2.
Table 1: mo and Si element proportion
| Examples | Mo/wt％ | Si/wt％ |
| Example 2 | 0.8 | 0.6 |
| Example 3 | 0.8 | 0.8 |
| Example 4 | 1.0 | 0.6 |
| Example 5 | 1.0 | 0.8 |
| Example 6 | 1.2 | 0.6 |
Table 2: tensile strength and elongation at 680 ℃ high temperature
| Examples | R m /MPa | A/％ |
| Example 1 | 672 | 18.6 |
| Example 2 | 680 | 16.8 |
| Example 3 | 676 | 18.2 |
| Example 4 | 698 | 17.8 |
| Example 5 | 686 | 17.2 |
| Example 6 | 714 | 19.6 |
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The near alpha high temperature titanium alloy suitable for 680 ℃ comprises the following components in percentage by mass: 5.4 to 6.5 percent of Al, 3.0 to 4.3 percent of Sn, 2.5 to 4.9 percent of Zr, 0.4 to 1.2 percent of Mo, 0.4 to 0.8 percent of Si, 0.2 to 1.1 percent of Nb, 0.2 to 1.6 percent of Ta, 2.0 to 2.5 percent of W, 0.06 to 0.1 percent of C, the balance of Ti and unavoidable impurities.
2. The method for preparing near alpha high temperature titanium alloy with use temperature of 680 ℃ according to claim 1, which is characterized by comprising the following steps:
(1) According to alloy composition calculation, weighing sponge titanium and intermediate alloy raw materials to manufacture an electrode, and smelting by adopting a vacuum consumable furnace to obtain an alloy cast ingot;
(2) Performing surface polishing and forging treatment on the alloy cast ingot obtained in the step (1) to obtain a forging;
(3) And (3) sequentially carrying out solid solution and aging treatment on the forging obtained in the step (2).
3. The method for preparing near-alpha high-temperature titanium alloy with 680 ℃ according to claim 2, wherein the intermediate alloy raw materials in the step (1) comprise AlSn50, alNb60, tiTa15, sponge zirconium, alSi50, alMo60, alW10, aluminum beans and carbon powder.
4. The method for producing a near alpha high temperature titanium alloy with a service temperature of 680 ℃ according to claim 2, wherein the titanium sponge is in the form of particles with a particle size of 0.80-12.0 mm.
5. The method for producing a near alpha high temperature titanium alloy having a use temperature of 680 ℃ according to claim 2 or 3, wherein the master alloy raw materials are all in the form of particles having a particle size of 0.25 to 6.00mm.
6. The method for producing a near- α high temperature titanium alloy having a use temperature of 680 ℃ according to claim 2, wherein in said step (1), an electrode is produced: placing the intermediate alloy raw materials into a mixer for clockwise uniform stirring, wherein the single mixing time is 5-8 min; after mixing, blank pressing is carried out, the pressing pressure is 20-60 MPa, a plurality of cylindrical blanks are pressed, and the two cylindrical blanks are welded into one by argon arc welding and serve as primary smelting electrodes.
7. The method for producing a near alpha high temperature titanium alloy at 680 ℃ according to claim 2, wherein in the step (1), the vacuum degree of the vacuum consumable electrode is less than or equal to 1.0Pa, the current is 3.5 to 5kA, and the voltage is 20 to 35V.
8. The method for preparing near alpha high temperature titanium alloy with 680 ℃ as claimed in claim 2, wherein in the step (2), the riser and the bottom of the alloy ingot are cut off, and the ingot is heated and kept for 3-5 hours at 1100-1200 ℃ in a high temperature furnace before forging; and (3) carrying out three upsetting and three drawing on the cast ingot, returning to the furnace for heat preservation for 30-50 min after each upsetting and drawing, wherein the total deformation of upsetting is 25-45%, and the deformation of drawing is 15-35%, so as to obtain the forging.
9. The method for preparing near-alpha high-temperature titanium alloy with 680 ℃ according to claim 2, wherein in the step (3), the solid solution temperature is 1025-1060 ℃, and the water cooling is performed after heat preservation for 2-3 hours; the aging temperature is 750-880 ℃, and air cooling is carried out after heat preservation for 6-8 hours.
10. The method for preparing near alpha high temperature titanium alloy with 680 ℃ according to claim 4, wherein pure titanium welding wire is adopted in the argon arc welding process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310947450.0A CN116949317A (en) | 2023-07-31 | 2023-07-31 | Near alpha high temperature titanium alloy with use temperature of 680 ℃ and preparation method thereof |
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| CN202310947450.0A CN116949317A (en) | 2023-07-31 | 2023-07-31 | Near alpha high temperature titanium alloy with use temperature of 680 ℃ and preparation method thereof |
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