CN116043049A - Preparation method of titanium alloy composite material - Google Patents
Preparation method of titanium alloy composite material Download PDFInfo
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- CN116043049A CN116043049A CN202211627701.9A CN202211627701A CN116043049A CN 116043049 A CN116043049 A CN 116043049A CN 202211627701 A CN202211627701 A CN 202211627701A CN 116043049 A CN116043049 A CN 116043049A
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- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000003723 Smelting Methods 0.000 claims abstract description 76
- 239000000843 powder Substances 0.000 claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 29
- 239000000956 alloy Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 20
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010936 titanium Substances 0.000 claims abstract description 17
- 239000011812 mixed powder Substances 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000000462 isostatic pressing Methods 0.000 claims abstract description 7
- 238000005245 sintering Methods 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 36
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 6
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 6
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 229910000676 Si alloy Inorganic materials 0.000 claims description 5
- 229910000756 V alloy Inorganic materials 0.000 claims description 5
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 5
- UNQHSZOIUSRWHT-UHFFFAOYSA-N aluminum molybdenum Chemical compound [Al].[Mo] UNQHSZOIUSRWHT-UHFFFAOYSA-N 0.000 claims description 5
- HIMLGVIQSDVUJQ-UHFFFAOYSA-N aluminum vanadium Chemical compound [Al].[V] HIMLGVIQSDVUJQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910001275 Niobium-titanium Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- RJSRQTFBFAJJIL-UHFFFAOYSA-N niobium titanium Chemical compound [Ti].[Nb] RJSRQTFBFAJJIL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 238000009827 uniform distribution Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 229910001257 Nb alloy Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- QNTVPKHKFIYODU-UHFFFAOYSA-N aluminum niobium Chemical compound [Al].[Nb] QNTVPKHKFIYODU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005551 mechanical alloying Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- ZPZCREMGFMRIRR-UHFFFAOYSA-N molybdenum titanium Chemical compound [Ti].[Mo] ZPZCREMGFMRIRR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/045—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by other means than ball or jet milling
- B22F2009/046—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by other means than ball or jet milling by cutting
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- 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
Abstract
The invention relates to a preparation method of a titanium alloy composite material, which comprises the following steps: s1, selecting Ti powder and TiB 2 Weighing and mixing the powder according to the proportion of 1:1 to obtain mixed powder; s2, pressing the mixed powder obtained in the step S1 into a blocky reinforcing phase blank by adopting isostatic pressing; s3, sintering the reinforcing phase blank in the S2 under the vacuum condition to obtain a reinforcing phase blank, and thenAdopting a lathe to process the reinforced phase scraps; s4, mixing the reinforced phase scraps, the selected titanium sponge and the selected intermediate alloy, and pressing the mixture into an electrode block by using a press; s5, assembling and welding the electrode blocks into strip electrodes, and smelting in a vacuum consumable arc furnace to obtain a finished cast ingot. The device solves the problem of directly adding TiB 2 Powder or B powder is added during vacuum consumable smelting, and when the reinforcing phase with more content is prepared, the powder is excessively added, the bonding strength of consumable electrode is poor and the powder is easy to scatter.
Description
Technical Field
The invention belongs to the technical field of titanium alloy material manufacturing, and relates to a preparation method of a titanium alloy composite material.
Background
Titanium-based composite materials (TMCS) have been studied extensively as candidates for hypersonic aerospace vehicles and next generation advanced aeroengines because of their excellent properties such as high strength, high stiffness and high elastic modulus. TMCS can be divided into two main categories, continuous fiber reinforced titanium matrix composites (FTMCS) and discontinuous particle (whisker) reinforced titanium matrix composites (PTMCS). The research work on TMCS is mainly focused on FTMCS (especially SiC fiber reinforced titanium matrix composite), and great progress is made, but expensive continuous fibers, complex preparation process and anisotropy in performance make it difficult to popularize and apply, and the research work is limited to producing main components such as aeroengines, aircraft skeletons and the like. Compared with FTMCS, PTMCS has the advantages of simple preparation process, low cost, no anisotropy and the like, and becomes a new research hotspot and trend.
The primary reinforcing phase of PTMCS is carbide, boride or other high hardness, high melting point materials, such as TiB, tiC, etc. The preparation method comprises a casting method, a mechanical alloying method, a high-temperature self-propagating synthesis method and a powder metallurgy method. At present, a fusion casting method is adopted as a main preparation mode of PTMCS materials, when PTMCS is prepared by adopting the fusion casting method, the generation of a generated reinforcing phase is usually carried out by directly adding powder, titanium sponge, intermediate alloy and the like for mixing and smelting, but the following problems also exist: (1) The powder is finer, so that the powder is easy to drift in the mixing process, the volume fraction of the reinforcing phase in the alloy is deviated from the theoretical value, and the precise control cannot be realized; (2) The powder is easy to agglomerate in a more humid environment, so that the reinforced phase is not uniformly distributed; (3) The powder is added more, so that the bonding force of the electrode block for preparing the electrode block is relatively poor, the problem of block falling easily occurs in the smelting process, and the alloy components are uneven.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a preparation method of a titanium alloy composite material, wherein a powder metallurgy mode is adopted to prepare a TiB reinforced phase matrix, the prepared reinforced phase matrix is processed into a chip shape and added into an electrode for preparing titanium alloy in the chip shape, and then a vacuum consumable smelting mode is adopted to smelt, so that the problem of directly adding TiB is solved 2 Powder or B powder is added during vacuum consumable smelting, and when the reinforcing phase with more content is prepared, the powder is excessively added, the bonding strength of consumable electrode is poor and the powder is easy to scatter.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a preparation method of a titanium alloy composite material comprises the following steps:
s1, selecting Ti powder and TiB 2 Weighing and mixing the powder according to the proportion of 1:1 to obtain mixed powder;
s2, pressing the mixed powder obtained in the step S1 into a blocky reinforcing phase blank by adopting isostatic pressing;
s3, sintering the reinforced phase blank in the S2 under a vacuum condition to obtain a reinforced phase blank, and processing the reinforced phase blank into reinforced phase scraps by a lathe;
s4, mixing the reinforced phase scraps, the selected titanium sponge and the selected intermediate alloy, and pressing the mixture into an electrode block by using a press;
s5, assembling and welding the electrode blocks into strip electrodes, and smelting in a vacuum consumable arc furnace to obtain a finished cast ingot.
Further, the step S3 specifically includes: heating to 800-900 ℃ at a heating rate of 5-10 ℃/min, preserving heat for 1h, heating to 1100-1200 ℃ at a heating rate of 8-15 ℃/min, preserving heat for 1h, heating to 1600-1650 ℃ at a heating rate of 8-15 ℃/min, preserving heat for 1h, and cooling to room temperature and discharging.
Further, the length and the width of the reinforcing phase scraps in the step S3 are less than or equal to 3mm.
Further, the assembly welding in S5 is vacuum plasma welding or argon protection plasma welding.
Further, the specific way of smelting in the vacuum consumable arc furnace in S5 is as follows:
s51, smelting the prepared strip-shaped electrode serving as a consumable electrode in a vacuum consumable arc furnace to obtain a primary ingot, wherein the smelting current is 4-10 KA, and the smelting voltage is controlled to be 24-33V;
s52, performing secondary smelting on the obtained primary ingot serving as a consumable electrode in a vacuum consumable arc furnace to obtain a secondary ingot, wherein the smelting current is 5-11 KA, and the smelting voltage is controlled to be 25-34V;
and S53, smelting the obtained secondary ingot as a consumable electrode in a vacuum consumable arc furnace for three times to obtain a tertiary ingot, cooling the ingot to below 400 ℃ after smelting, discharging the ingot, and controlling the smelting current to be 6-12 KA and the smelting voltage to be 26-38V.
And (3) further, peeling, flaw detection and riser sawing are carried out on the finished cast ingot in the step (S5) to obtain the titanium alloy composite material.
Further, the intermediate alloy in the step S4 is at least one of aluminum-vanadium alloy, aluminum-molybdenum alloy, aluminum-silicon alloy, niobium-titanium alloy and aluminum bean.
Further, the weight of the mixed materials in the step S4 is 800-1000kg.
Further, the process of peeling, flaw detection and riser sawing on the finished ingot in the step S5 specifically comprises the following steps: after the ingot is flatheaded and peeled by a lathe, ultrasonic flaw detection is carried out to determine the position of a riser of the ingot and saw the riser.
Compared with the prior art, the invention has the following beneficial effects:
a process for preparing Ti-alloy composite includes preparing Ti-B reinforced phase matrix by powder metallurgy, processing the reinforced phase matrix to become chip, adding it to the electrode for preparing Ti-alloy, and vacuum consumable smelting to obtain Ti-B alloy 2 Powder or B powder is added during vacuum consumable smelting, and when the reinforcing phase with more content is prepared, the powder is excessively added, the bonding strength of consumable electrode is poor and the powder is easy to scatter.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate principles of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is an as-cast structure diagram of a TA15 titanium-based composite material prepared in example 1 of the present invention;
FIG. 2 is an as-cast structure diagram of a TB8 titanium-based composite material prepared in example 2 of the present invention;
FIG. 3 is an as-cast structure diagram of a TB6 titanium-based composite material prepared in example 3 of the present invention.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of devices that are consistent with aspects of the invention that are set forth in the following claims.
The present invention will be described in further detail below with reference to the drawings and examples for better understanding of the technical solutions of the present invention to those skilled in the art.
A preparation method of a titanium alloy composite material comprises the following steps:
step one, selecting Ti powder and TiB 2 Weighing and mixing the powder according to the proportion of 1:1 to obtain mixed powder;
step two, adopting isostatic pressing to press the mixed powder into a blocky reinforcing phase blank;
step three, sintering the reinforced phase blank under the vacuum condition, firstly heating to 800-900 ℃ at the heating rate of 5-10 ℃/min, preserving heat for 1h, then heating to 1100-1200 ℃ at the heating rate of 8-15 ℃/min, preserving heat for 1h, finally heating to 1600-1650 ℃ at the heating rate of 8-15 ℃/min, preserving heat for 1h, cooling to room temperature, discharging to obtain the reinforced phase blank, and then adopting a lathe to process the reinforced phase blank into reinforced phase scraps, wherein the length and the width of the reinforced phase scraps are less than or equal to 3mm.
Step four, mixing the reinforced phase scraps, the selected titanium sponge and the selected intermediate alloy, and pressing the mixture into an electrode block by using a press; the intermediate alloy is at least one of aluminum-vanadium alloy, aluminum-molybdenum alloy, aluminum-silicon alloy, niobium-titanium alloy and aluminum bean, and the mixing weight is 800-1000kg.
Fifthly, welding the electrode block into strip electrodes by using vacuum plasma welding or argon protection plasma welding, and smelting in a vacuum consumable arc furnace:
smelting the prepared strip electrode serving as a consumable electrode in a vacuum consumable arc furnace to obtain a primary ingot, wherein the smelting current is 4-10 KA, and the smelting voltage is controlled to be 24-33V;
the obtained primary ingot is used as a consumable electrode to be subjected to secondary smelting in a vacuum consumable arc furnace to obtain a secondary ingot, the smelting current is 5-11 KA, and the smelting voltage is controlled to be 25-34V;
and smelting the obtained secondary ingot as a consumable electrode in a vacuum consumable arc furnace for three times to obtain a finished cast ingot, cooling the cast ingot to below 400 ℃ after smelting, discharging the cast ingot, wherein the smelting current is 6-12 KA, and the smelting voltage is controlled at 26-38V.
And (3) after the ingot is subjected to flat head and peeling by a lathe, carrying out ultrasonic flaw detection to determine the position of a riser of the ingot and sawing the riser to obtain the titanium alloy composite material.
The following description is made in connection with specific technical processes:
example 1:
the invention provides a preparation method of a titanium alloy composite material, which comprises the following steps:
step one, selecting Ti powder and TiB 2 Weighing and mixing the powder according to the proportion of 1:1 to obtain mixed powder;
step two, adopting isostatic pressing to press the mixed powder into a blocky reinforcing phase blank;
step three, sintering the reinforced phase blank under the vacuum condition, firstly heating to 800 ℃ at the heating rate of 5-10 ℃/min, preserving heat for 1h, then heating to 1200 ℃ at the heating rate of 8-15 ℃/min, preserving heat for 1h, finally heating to 1600 ℃ at the heating rate of 8-15 ℃/min, preserving heat for 1h, cooling to room temperature, discharging to obtain the reinforced phase blank, and machining into reinforced phase scraps by a lathe, wherein the length and the width of the reinforced phase scraps are less than or equal to 3mm.
Step four, mixing the reinforced phase scraps, the selected titanium sponge and the selected intermediate alloy, and pressing the mixture into a block electrode with a single block weight of 20Kg by using a pressing machine; the intermediate alloy is at least one of aluminum vanadium alloy, aluminum molybdenum alloy, aluminum silicon alloy, sponge zirconium and aluminum bean, and the mixing weight is 1000kg.
Fifthly, welding the electrode block into strip electrodes by using vacuum plasma welding or argon protection plasma welding, and smelting in a vacuum consumable arc furnace:
smelting the prepared strip electrode serving as a consumable electrode in a vacuum consumable arc furnace to obtain a primary ingot, wherein the smelting current is 4-10 KA, and the smelting voltage is controlled to be 24-33V;
the obtained primary ingot is used as a consumable electrode to be subjected to secondary smelting in a vacuum consumable arc furnace to obtain a secondary ingot, the smelting current is 5-11 KA, and the smelting voltage is controlled to be 25-34V;
and smelting the obtained secondary ingot as a consumable electrode in a vacuum consumable arc furnace for three times to obtain a finished cast ingot, cooling the cast ingot to below 400 ℃ after smelting, discharging the cast ingot, wherein the smelting current is 6-12 KA, and the smelting voltage is controlled at 26-38V.
And (3) after the ingot is subjected to flat head and peeling by a lathe, carrying out ultrasonic flaw detection to determine the position of a riser of the ingot and sawing the riser to obtain the titanium alloy composite material.
After the flat head and the peeling of a lathe are carried out, ultrasonic flaw detection is carried out to determine the position of a riser of an ingot casting and saw cut the riser, meanwhile, block-shaped and chip-shaped samples are respectively taken at the head, the upper part, the middle part and the lower part of the ingot casting for component analysis, and the chemical component analysis results of the prepared 1000 kg-level TA15 titanium-based composite material are shown in the table 1:
table 1.
| Sampling part | Al | Mo | Si | V | Zr | Fe | H | N | O | C | B |
| Head | 6.19 | 0.928 | ＜0.01 | 0.864 | 1.92 | 0.019 | ＜0.0006 | ＜0.003 | 0.086 | 0.015 | 0.456 |
| In (a) | 6.12 | 0.905 | ＜0.01 | 0.856 | 1.93 | 0.220 | / | / | / | 0.015 | 0.465 |
| Tail of tail | 6.14 | 0.895 | ＜0.01 | 0.866 | 1.89 | 0.023 | ＜0.0006 | 0.003 | 0.085 | 0.022 | 0.476 |
As can be seen from Table 1, the reinforcing phase elements B in the alloy are uniformly distributed at different positions of the ingot, and the uniform distribution of the reinforcing phase elements can be realized by adopting the method.
The morphology of the reinforcing phase in the cast ingot is shown in figure 1, and as can be seen from figure 1, in the cast ingot prepared by the method, the formed needle-shaped TiB reinforcing phase is uniform in distribution.
Example 2
The invention provides a preparation method of a titanium alloy composite material, which comprises the following steps:
step one, selecting Ti powder and TiB 2 Weighing and mixing the powder according to the proportion of 1:1 to obtain mixed powder;
step two, adopting isostatic pressing to press the mixed powder into a blocky reinforcing phase blank;
step three, sintering the reinforced phase blank under the vacuum condition, firstly heating to 850 ℃ at the heating rate of 5-10 ℃/min, preserving heat for 1h, then heating to 1150 ℃ at the heating rate of 8-15 ℃/min, preserving heat for 1h, finally heating to 1625 ℃ at the heating rate of 8-15 ℃/min, preserving heat for 1h, cooling to room temperature, discharging to obtain the reinforced phase blank, and processing into reinforced phase scraps by a lathe, wherein the length and the width of the reinforced phase scraps are less than or equal to 3mm.
Step four, mixing the reinforced phase scraps, the selected titanium sponge and the selected intermediate alloy, and pressing the mixture into a block electrode with a single block weight of 20Kg by using a pressing machine; the intermediate alloy is at least one of aluminum-molybdenum alloy, titanium-molybdenum alloy, aluminum-niobium alloy, aluminum-silicon alloy, niobium-titanium alloy and aluminum bean, and the mixing weight is 800kg.
Fifthly, welding the electrode block into strip electrodes by using vacuum plasma welding or argon protection plasma welding, and smelting in a vacuum consumable arc furnace:
smelting the prepared strip electrode serving as a consumable electrode in a vacuum consumable arc furnace to obtain a primary ingot, wherein the smelting current is 4-10 KA, and the smelting voltage is controlled to be 24-33V;
the obtained primary ingot is used as a consumable electrode to be subjected to secondary smelting in a vacuum consumable arc furnace to obtain a secondary ingot, the smelting current is 5-11 KA, and the smelting voltage is controlled to be 25-34V;
and smelting the obtained secondary ingot as a consumable electrode in a vacuum consumable arc furnace for three times to obtain a finished cast ingot, cooling the cast ingot to below 400 ℃ after smelting, discharging the cast ingot, wherein the smelting current is 6-12 KA, and the smelting voltage is controlled at 26-38V.
And (3) after the ingot is subjected to flat head and peeling by a lathe, carrying out ultrasonic flaw detection to determine the position of a riser of the ingot and sawing the riser to obtain the titanium alloy composite material.
The chemical composition analysis results of the prepared 800 kg-grade TB8 titanium-based composite material are shown in Table 2, wherein the chemical composition analysis results are obtained by taking block-shaped and chip-shaped samples at the head, upper part, middle part and lower part of an ingot:
table 2.
As can be seen from Table 2, the reinforcing phase elements B in the TB8 titanium alloy composite material prepared by the method are uniformly distributed at different positions of the cast ingot, the morphology of the reinforcing phase in the cast ingot is shown in FIG. 2, and as can be seen from FIG. 2, the TiB reinforcing phase in the cast ingot is uniformly distributed and is a needle-shaped TiB reinforcing phase.
Example 3
The invention provides a preparation method of a titanium alloy composite material, which comprises the following steps:
step one, selecting Ti powder and TiB 2 Weighing and mixing the powder according to the proportion of 1:1 to obtain mixed powder;
step two, adopting isostatic pressing to press the mixed powder into a blocky reinforcing phase blank;
step three, sintering the reinforced phase blank under the vacuum condition, firstly heating to 900 ℃ at the heating rate of 5-10 ℃/min, preserving heat for 1h, then heating to 1200 ℃ at the heating rate of 8-15 ℃/min, preserving heat for 1h, finally heating to 1650 ℃ at the heating rate of 8-15 ℃/min, preserving heat for 1h, cooling to room temperature, discharging to obtain the reinforced phase blank, and processing into reinforced phase scraps by a lathe, wherein the length and the width of the reinforced phase scraps are less than or equal to 3mm.
Step four, mixing the reinforced phase scraps, the selected titanium sponge and the selected intermediate alloy, and pressing the mixture into a block electrode with a single block weight of 20Kg by using a pressing machine; the intermediate alloy is at least one of aluminum vanadium alloy, ferrotitanium alloy, aluminum beans and pure iron, and the mixing weight is 800kg.
Fifthly, welding the electrode block into strip electrodes by using vacuum plasma welding or argon protection plasma welding, and smelting in a vacuum consumable arc furnace:
smelting the prepared strip electrode serving as a consumable electrode in a vacuum consumable arc furnace to obtain a primary ingot, wherein the smelting current is 4-10 KA, and the smelting voltage is controlled to be 24-33V;
the obtained primary ingot is used as a consumable electrode to be subjected to secondary smelting in a vacuum consumable arc furnace to obtain a secondary ingot, the smelting current is 5-11 KA, and the smelting voltage is controlled to be 25-34V;
and smelting the obtained secondary ingot as a consumable electrode in a vacuum consumable arc furnace for three times to obtain a finished cast ingot, cooling the cast ingot to below 400 ℃ after smelting, discharging the cast ingot, wherein the smelting current is 6-12 KA, and the smelting voltage is controlled at 26-38V.
And (3) after the ingot is subjected to flat head and peeling by a lathe, carrying out ultrasonic flaw detection to determine the position of a riser of the ingot and sawing the riser to obtain the titanium alloy composite material.
The chemical composition analysis results of the prepared 800 kg-level titanium-based composite material are shown in table 3, wherein the chemical composition analysis results are obtained by taking block-shaped and chip-shaped samples at the head, upper part, middle part and lower part of the cast ingot respectively:
table 3.
| Sampling part | Al | V | Fe | B | C | N | H | O |
| Head | 2.92 | 10.15 | 1.95 | 1.15 | 0.012 | 0.011 | 0.006 | 0.11 |
| In (a) | 2.95 | 10.23 | 1.85 | 1.12 | 0.011 | / | / | / |
| Tail of tail | 3.06 | 10.08 | 1.97 | 1.21 | 0.012 | 0.012 | 0.005 | 0.12 |
As can be seen from Table 3, the TB6 titanium alloy composite material prepared by the method has uniform distribution of B element of the reinforcing phase element and uniform distribution of the reinforcing phase content on different positions of the cast ingot. The morphology of the reinforcing phase in the cast ingot is shown in fig. 3, and as can be seen from fig. 3, the reinforcing phases in the cast ingot prepared by the method are needle-shaped and uniformly distributed.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It will be understood that the invention is not limited to what has been described above and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (9)
1. The preparation method of the titanium alloy composite material is characterized by comprising the following steps:
s1, selecting Ti powder and TiB 2 Weighing and mixing the powder according to the proportion of 1:1 to obtain mixed powder;
s2, pressing the mixed powder obtained in the step S1 into a blocky reinforcing phase blank by adopting isostatic pressing;
s3, sintering the reinforced phase blank in the S2 under a vacuum condition to obtain a reinforced phase blank, and processing the reinforced phase blank into reinforced phase scraps by a lathe;
s4, mixing the reinforced phase scraps, the selected titanium sponge and the selected intermediate alloy, and pressing the mixture into an electrode block by using a press;
s5, assembling and welding the electrode blocks into strip electrodes, and smelting in a vacuum consumable arc furnace to obtain a finished cast ingot.
2. The method for preparing a titanium alloy composite material according to claim 1, wherein the step S3 is specifically: heating to 800-900 ℃ at a heating rate of 5-10 ℃/min, preserving heat for 1h, heating to 1100-1200 ℃ at a heating rate of 8-15 ℃/min, preserving heat for 1h, heating to 1600-1650 ℃ at a heating rate of 8-15 ℃/min, preserving heat for 1h, and cooling to room temperature and discharging.
3. The method for preparing the titanium alloy composite material according to claim 1, wherein the length and the width of the reinforcing phase scraps in the step S3 are less than or equal to 3mm.
4. The method for preparing a titanium alloy composite material according to claim 1, wherein the assembly welding in S5 is vacuum plasma welding or argon protection plasma welding.
5. The method for preparing a titanium alloy composite material according to claim 1, wherein the specific manner of smelting in the vacuum consumable arc furnace in S5 is as follows:
s51, smelting the prepared strip-shaped electrode serving as a consumable electrode in a vacuum consumable arc furnace to obtain a primary ingot, wherein the smelting current is 4-10 KA, and the smelting voltage is controlled to be 24-33V;
s52, performing secondary smelting on the obtained primary ingot serving as a consumable electrode in a vacuum consumable arc furnace to obtain a secondary ingot, wherein the smelting current is 5-11 KA, and the smelting voltage is controlled to be 25-34V;
and S53, smelting the obtained secondary ingot as a consumable electrode in a vacuum consumable arc furnace for three times to obtain a tertiary ingot, cooling the ingot to below 400 ℃ after smelting, discharging the ingot, and controlling the smelting current to be 6-12 KA and the smelting voltage to be 26-38V.
6. The method for preparing the titanium alloy composite material according to claim 1, wherein the finished cast ingot in the step S5 is subjected to skinning, flaw detection and riser sawing to obtain the titanium alloy composite material.
7. The method for preparing a titanium alloy composite material according to claim 1, wherein the intermediate alloy in S4 is at least one of an aluminum vanadium alloy, an aluminum molybdenum alloy, an aluminum silicon alloy, a niobium titanium alloy and an aluminum bean.
8. The method for preparing a titanium alloy composite material according to claim 1, wherein the weight of the mixed material in the step S4 is 800-1000kg.
9. The method for preparing the titanium alloy composite material according to claim 6, wherein the steps of peeling, flaw detection and riser sawing of the finished ingot in the step S5 are specifically as follows: after the ingot is flatheaded and peeled by a lathe, ultrasonic flaw detection is carried out to determine the position of a riser of the ingot and saw the riser.
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