CN112718909A - Short-process preparation method of Ti-Al-Nb-Zr-Mo alloy seamless tube - Google Patents
Short-process preparation method of Ti-Al-Nb-Zr-Mo alloy seamless tube Download PDFInfo
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- CN112718909A CN112718909A CN202011323764.6A CN202011323764A CN112718909A CN 112718909 A CN112718909 A CN 112718909A CN 202011323764 A CN202011323764 A CN 202011323764A CN 112718909 A CN112718909 A CN 112718909A
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- 229910001182 Mo alloy Inorganic materials 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000004513 sizing Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000004080 punching Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 33
- 238000003723 Smelting Methods 0.000 claims description 21
- 230000009467 reduction Effects 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 10
- 239000000314 lubricant Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 229910052726 zirconium Inorganic materials 0.000 claims description 10
- 239000013590 bulk material Substances 0.000 claims description 9
- 230000007547 defect Effects 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 229910001257 Nb alloy Inorganic materials 0.000 claims description 5
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 5
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 5
- 241001062472 Stokellia anisodon Species 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- UNQHSZOIUSRWHT-UHFFFAOYSA-N aluminum molybdenum Chemical compound [Al].[Mo] UNQHSZOIUSRWHT-UHFFFAOYSA-N 0.000 claims description 5
- QNTVPKHKFIYODU-UHFFFAOYSA-N aluminum niobium Chemical compound [Al].[Nb] QNTVPKHKFIYODU-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 239000010955 niobium Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 238000003303 reheating Methods 0.000 claims 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
- 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
- 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
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention provides a short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless tube, which is characterized by comprising the following steps: 1) preparing materials, 2) mixing and briquetting, 3) putting the materials into an electron beam gun EB furnace, 4) carrying out vacuum melting to obtain a Ti-Al-Nb-Zr-Mo alloy round ingot, 5) punching centering holes at two ends of the ingot, carrying out oblique rolling and perforation by a two-roll oblique rolling mill, 6) carrying out continuous rolling by a three-roll continuous rolling mill, 7) carrying out heating and sizing to obtain a seamless pipe, and 8) carrying out annealing treatment to obtain the Ti-Al-Nb-Zr-Mo alloy seamless pipe. The obtained pipe has uniform components and tissues, less high-low density impurities, high purity, short process flow, mechanical properties superior to the prior art, comprehensive yield increased to about 85 percent, production cost reduced by 20-30 percent, and obvious market application prospect.
Description
Technical Field
The invention relates to a short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless tube, belonging to the technical field of rolling of nonferrous metals.
Background
The Ti-6Al-3Nb-2Zr-1Mo titanium alloy (namely TA31 titanium alloy) not only has small density, high specific strength and good plasticity and corrosion resistance, but also has higher fracture toughness, stress corrosion fracture toughness, impact toughness, weldability and the like, particularly has outstanding seawater resistance and ocean atmospheric corrosion resistance, and is suitable for excellent light structural materials of parts such as oil well pipes, sea-going pipeline systems, heat exchangers and the like. After being processed into seamless pipes, the seamless pipes have wide application prospect in the fields of offshore oil drilling platforms, marine engineering equipment, ships, submarines, deep submergence vehicles, offshore facilities and the like.
The technical process for preparing the TA31 titanium alloy seamless tube in the prior art comprises the following steps: firstly, mixing titanium sponge and alloy raw materials, pressing and welding the mixture into an electrode, smelting the electrode into a round ingot through a vacuum consumable arc furnace (VAR) for 2-3 times, forging the round ingot, then drilling and extruding or obliquely perforating, and finally preparing the TA31 titanium alloy seamless pipe with different specifications and purposes through processes such as rolling, drawing, spinning and the like. Obviously, the prior art has the defects of long process flow, low comprehensive yield, difficulty in obtaining an ultra-long pipe and the like, so that the cost of the TA31 titanium alloy seamless pipe is high, and the application is greatly limited. Therefore, there is a need for improvements in the prior art.
Disclosure of Invention
In order to overcome the defects of the existing TA31 titanium alloy seamless tube preparation method, the invention provides a short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless tube, which is characterized by comprising the following steps:
(1) preparing materials according to the following mass ratio:
5.7-6.3 wt.% of aluminum niobium alloy
Aluminum bean 4.05-4.77 wt. -%)
Zirconium sponge 1.5-2.5 wt. -%)
1.5-1.7 wt.% of aluminum-molybdenum alloy
Titanium sponge balance
The total of the components is 100 wt.%;
(2) mixing the prepared materials in the step (1), taking a proper amount of mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 100-120 ℃ for 5-6 hours, and cooling the blocks along with a furnace to obtain pressed blocks;
(3) laying the bulk material in the step (2) in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;
(4) under a vacuum of 1.8X 10-3～3.5×10-3When torr, opening No. 1 to No. 5 electron guns to smelt the bulk material in the cooling bed, controlling the voltage of No. 1 to No. 5 electron guns to be 29.5 to 30.5KV and the current to be 3.3 to 4.3A, after smelting for 100 to 120min, closing the electron guns, cooling for 20 to 40min, pushing the briquetting material in the feeding area into the smelting area, simultaneously opening No. 1 to No. 7 electron guns to continue smelting, controlling the voltage of No. 1 to No. 7 electron guns to be 29.5 to 30.5KV, controlling the current of No. 1 to No. 2 electron guns to be 2.3 to 3.0A, the current of No. 3 to No. 4 electron guns to be 5.3 to 6A, the current of No. 5 electron guns to be 3.6 to 4.6A, the current of No. 6 to No. 7 electron guns to be 1.6 to 2.6A, simultaneously keeping the ingot pulling speed of 12 to 18mm/min, thus continuously pushing, melting and pulling ingots till the smelting is completed, then cooling to the ingot from a crystallizer, taking out, polishing the surface of the ingot, and peeling off the ingot, obtaining a Ti-Al-Nb-Zr-Mo alloy round ingot;
(5) and (4) punching centering holes at two ends of the Ti-Al-Nb-Zr-Mo alloy round ingot in the step (4), feeding the round ingot into a heating furnace, heating to 1100-1200 ℃, preserving heat for 6-8 h, feeding the round ingot into a two-roll skew rolling mill, performing skew rolling perforation, and controlling: the total reduction rate is 10-15%, the pre-top reduction rate is 6-8%, the ellipticity coefficient is 1.11-1.18, the perforation speed is 0.15-0.4 m/s, and the temperature is 1080-1120 ℃, so that a perforated pipe is obtained;
(6) and (5) sending the perforated pipe in the step (5) to a three-roll continuous rolling mill for continuous rolling, and controlling: the total reduction rate is 12-18%, the ovality coefficient is 1.05-1.15, the perforation speed is 0.3-0.6 m/s, and the temperature is 950-1000 ℃, so as to obtain a continuous rolling pipe;
(7) feeding the continuously rolled pipe in the step (6) into a heating furnace, heating to 800-900 ℃, feeding the pipe into a sizing mill for sizing, and controlling the sizing rate to be 0.4-0.8 m/s to obtain a seamless pipe;
(8) and (4) annealing the seamless pipe material obtained in the step (7) at the temperature of 850-900 ℃ for 2-3 h, and cooling to room temperature to obtain the Ti-Al-Nb-Zr-Mo alloy seamless pipe.
In the step (5), after the Ti-Al-Nb-Zr-Mo alloy round ingot is heated, before the round ingot enters the inclined rolling mill, a glass powder lubricant is required to be coated on one end close to the top, and meanwhile, the glass powder lubricant wrapped by the tinfoil is filled into the centering hole, so that defects on the inner wall of the pipe in the perforating process are prevented.
The Ti-Al-Nb-Zr-Mo alloy seamless tube obtained in the step (8) comprises the following components: al: 5.5 wt.% to 6.5wt.%, Nb: 2.5wt.% to 3.5wt.%, Zr: 1.5-2.5 wt.%, 0.6-1.5 wt.% Mo, and the balance Ti.
The invention has the following advantages and beneficial effects: the Ti-Al-Nb-Zr-Mo alloy seamless tube obtained by the technical scheme has uniform components and tissues, less high-low density inclusions and high purity, does not need forging in the processing process, directly sends the smelted cast ingot to a two-roll oblique rolling puncher to prepare a perforated seamless tube, and then obtains a product through three-roll continuous rolling, sizing and annealing, thereby not only shortening the process flow of the titanium alloy seamless tube, but also having mechanical properties superior to the level prepared by the prior art. The method has the advantages of simple process, convenient operation and short process flow, improves the comprehensive yield of the seamless tube to about 85 percent, reduces the production cost by 20 to 30 percent, and has obvious market application prospect.
Drawings
FIG. 1 is a process flow diagram of the present invention.
FIG. 2 is a metallographic structure diagram of a pipe obtained in example 1 of the present invention.
FIG. 3 is a metallographic structure diagram of a pipe obtained in example 2 of the present invention.
FIG. 4 is a metallographic structure diagram of a pipe obtained in example 3 of the present invention.
FIG. 5 is a graph of the mechanical properties of the pipe obtained in example 1 of the present invention.
FIG. 6 is a mechanical property diagram of the pipe obtained in example 2 of the present invention.
FIG. 7 is a graph of the mechanical properties of the pipe obtained in example 3 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to the description.
Example 1
A short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless tube is characterized by comprising the following steps:
(1) preparing materials according to the following mass ratio:
aluminum niobium alloy 5.7wt. -%)
Aluminum bean 4.05wt. -%)
Zirconium sponge 1.5wt. -%)
Aluminum molybdenum alloy 1.5wt. -%)
Titanium sponge 87.25 wt.%;
(2) mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 100 ℃ for 6 hours, and cooling the blocks along with a furnace to obtain pressed blocks;
(3) laying the bulk material in the step (2) in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;
(4) under a vacuum of 1.8X 10-3When torr is needed, the No. 1-5 electron guns are started to smelt the bulk materials in the cooling bed, the voltage of the No. 1-5 electron guns is controlled to be 29.5KV, the current is controlled to be 3.3A, after smelting is carried out for 100min, the electron guns are closed, after cooling is carried out for 20min, the pressed block materials in the feeding area are pushed into the smelting area to be smeltedSimultaneously starting No. 1-7 electron guns to continue smelting, controlling the voltage of No. 1-7 electron guns to be 29.5KV, the current of No. 1-2 electron guns to be 2.3A, the current of No. 3-4 electron guns to be 5.3A, the current of No. 5 electron guns to be 3.6A and the current of No. 6-7 electron guns to be 1.6A, simultaneously keeping the ingot pulling speed of 12mm/min, continuously pushing, melting and pulling ingots till smelting is finished, cooling to 80 ℃, taking out the ingots from a crystallizer, cooling to room temperature, and obtaining Ti-Al-Nb-Zr-Mo alloy round ingots after surface peeling and polishing treatment;
(5) after centering holes are drilled at two ends of the Ti-Al-Nb-Zr-Mo alloy round ingot obtained in the step (4), the round ingot is sent into a heating furnace to be heated to 1100 ℃, the temperature is kept for 8 hours, after the round ingot is taken out of the furnace, a proper amount of glass powder lubricant is quickly smeared at one end close to a top head, and meanwhile, the glass powder lubricant wrapped by tinfoil is stuffed into the centering holes to prevent the inner wall of the pipe from generating defects in the perforating process, and then the round ingot is sent into a two-roll skew rolling mill to be subjected to skew rolling perforation, and the control: the total reduction rate is 10 percent, the pre-top reduction rate is 6 percent, the ovality coefficient is 1.11, the perforation speed is 0.15m/s, and the temperature is 1080 ℃, so that a perforated pipe is obtained;
(6) and (5) sending the perforated pipe in the step (5) to a three-roll continuous rolling mill for continuous rolling, and controlling: the total reduction rate is 12 percent, the ovality coefficient is 1.05, the perforation speed is 0.3m/s, and the temperature is 950 ℃, thus obtaining a continuous rolling pipe;
(7) feeding the continuously rolled pipe in the step (6) into a heating furnace, heating to 800 ℃, feeding the pipe into a sizing mill for sizing, and controlling the sizing rate to be 0.4m/s to obtain a seamless pipe;
(8) annealing the seamless pipe material obtained in the step (7) at 850 ℃ for 3h, and cooling to room temperature to obtain a Ti-Al-Nb-Zr-Mo alloy seamless pipe;
the Ti-Al-Nb-Zr-Mo alloy seamless tube comprises the following components: al: 58wt.%, Nb: 2.98wt.%, Zr: 2.00wt.%, 1.02wt.% Mo, and the balance Ti;
through mechanical property detection, the mechanical properties of the annealed seamless pipe can meet the requirements, and the obtained seamless pipe has the dimensions of phi 180 multiplied by 12 multiplied by 11452mm (outer diameter multiplied by wall thickness multiplied by length).
The mechanical properties are shown in table 1 and fig. 5:
TABLE 1
| Sample number | Rm/MPa | Rp0.2/MPa | A/% |
| 1 | 902 | 793 | 12.8 |
| 2 | 910 | 806 | 12.4 |
| 3 | 896 | 801 | 13.2 |
| 4 | 906 | 794 | 12.1 |
| 5 | 914 | 812 | 12.9 |
| 6 | 903 | 793 | 13.2 |
| Mean value of | 905 | 799 | 12.7 |
The metallographic structure is shown in FIG. 2.
Example 2
A short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless tube is characterized by comprising the following steps:
(1) preparing materials according to the following mass ratio:
aluminum niobium alloy 6.3wt. -%)
Aluminum bean 4.77wt. -%)
Zirconium sponge 2.5wt. -%)
Aluminum molybdenum alloy 1.7wt. -%)
84.73wt.% titanium sponge;
(2) mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 120 ℃ for 5 hours, and cooling the blocks along with a furnace to obtain pressed blocks;
(3) laying the bulk material in the step (2) in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;
(4) under vacuum degree of 3.5X 10-3When torr is used, the No. 1-5 electron guns are started to smelt the bulk material in the cooling bed, the voltage of the No. 1-5 electron guns is controlled to be 30.5KV, the current is 4.3A, after smelting is carried out for 120min, the electron guns are closed, after cooling is carried out for 40min, the pressed block material in the feeding area is pushed into the smelting area, meanwhile, the No. 1-7 electron guns are started to continue smelting, the voltage of the No. 1-7 electron guns is controlled to be 30.5KV, the current of the No. 1-2 electron guns is 3.0A, the current of the No. 3-4 electron guns is 6A, the current of the No. 5 electron gun is 4.6A, the current of the No. 6-7 electron guns is 2.6A, andkeeping the ingot pulling speed of 18mm/min, continuously pushing, melting and pulling the ingot in the way until the smelting is finished, then cooling to 100 ℃, taking the ingot out of the crystallizer, cooling to room temperature, and performing surface peeling and polishing treatment to obtain a Ti-Al-Nb-Zr-Mo alloy round ingot;
(5) after centering holes are drilled at two ends of the Ti-Al-Nb-Zr-Mo alloy round ingot obtained in the step (4), the round ingot is sent into a heating furnace to be heated to 1200 ℃, the temperature is kept for 6 hours, after the round ingot is taken out of the furnace, a proper amount of glass powder lubricant is quickly smeared at one end close to a top head, and meanwhile, the glass powder lubricant wrapped by tinfoil is stuffed into the centering holes to prevent the inner wall of the pipe from generating defects in the perforating process, and then the round ingot is sent into a two-roll skew rolling mill to be subjected to skew rolling perforation, and the control: the total reduction rate is 15 percent, the reduction rate before jacking is 8 percent, the ovality coefficient is 1.18, the perforation speed is 0.4m/s, and the temperature is 1120 ℃, so that a perforated pipe is obtained;
(6) and (5) sending the perforated pipe in the step (5) to a three-roll continuous rolling mill for continuous rolling, and controlling: the total reduction rate is 18 percent, the ovality coefficient is 1.15, the perforation speed is 0.6m/s, and the temperature is 1000 ℃, thus obtaining a continuous rolling pipe;
(7) feeding the continuously rolled pipe in the step (6) into a heating furnace, heating to 900 ℃, feeding the pipe into a sizing mill for sizing, and controlling the sizing rate to be 0.8m/s to obtain a seamless pipe;
(8) annealing the seamless pipe material obtained in the step (7) at the temperature of 900 ℃ for 2h, and cooling to room temperature to obtain a Ti-Al-Nb-Zr-Mo alloy seamless pipe;
the Ti-Al-Nb-Zr-Mo alloy seamless tube comprises the following components: al: 6.12wt.%, Nb: 3.02wt.%, Zr: 2.03wt.%, 1.00wt.% Mo, and the balance Ti;
the mechanical properties are shown in table 2 and fig. 6:
TABLE 2
| Sample number | Rm/MPa | Rp0.2/MPa | A/% |
| 1 | 921 | 806 | 12.9 |
| 2 | 916 | 814 | 13.2 |
| 3 | 909 | 806 | 12.4 |
| 4 | 913 | 816 | 13.0 |
| 5 | 915 | 807 | 12.6 |
| 6 | 920 | 812 | 12.8 |
| Mean value of | 916 | 810 | 12.8 |
Through mechanical property detection, the mechanical properties of all parts can meet the requirements, and the obtained seamless pipe has the dimensions of phi 180 multiplied by 12 multiplied by 11802mm (outer diameter multiplied by wall thickness multiplied by length).
The metallographic structure is shown in FIG. 3.
Example 3
A short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless tube is characterized by comprising the following steps:
(1) preparing materials according to the following mass ratio:
aluminum niobium alloy 6.0wt. -%)
Aluminum bean 4.62wt. -%)
Zirconium sponge 2.00wt. -%)
Aluminum molybdenum alloy 1.6wt. -%)
Titanium sponge 58.78 wt.%;
(2) mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 110 ℃ for 5 hours, and cooling the blocks along with a furnace to obtain pressed blocks;
(3) laying the bulk material in the step (2) in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;
(4) under vacuum degree of 2.6X 10-3When torr, starting No. 1 to No. 5 electron guns to smelt the bulk material in the cooling bed, controlling the voltage of No. 1 to No. 5 electron guns to be 30KV and the current to be 3.8A, smelting for 110min, closing the electron gun, cooling for 30min, pushing the briquetting material in the feeding zone into the smelting zone, meanwhile, opening No. 1 to No. 7 electron guns to continue smelting, controlling the voltage of No. 1 to No. 7 electron guns to be 30KV, controlling the current of No. 1 to No. 2 electron guns to be 2.8A, the current of No. 3 to No. 4 electron guns to be 5.8A, the current of No. 5 electron guns to be 4.1A and the current of No. 6 to No. 7 electron guns to be 1.9A, keeping the ingot pulling speed of 15mm/min, continuously pushing, melting and pulling the ingot in the way until the smelting is finished, then cooling to 90 ℃, taking the ingot out of the crystallizer, cooling to room temperature, and performing surface peeling and polishing treatment to obtain a Ti-Al-Nb-Zr-Mo alloy round ingot;
(5) after centering holes are drilled at two ends of the Ti-Al-Nb-Zr-Mo alloy round ingot obtained in the step (4), the round ingot is sent into a heating furnace to be heated to 1150 ℃, heat is preserved for 7 hours, after the round ingot is taken out of the furnace, a proper amount of glass powder lubricant is quickly smeared at one end close to a top head, and meanwhile, the glass powder lubricant wrapped by tinfoil is stuffed into the centering holes to prevent the inner wall of the pipe from generating defects in the perforating process, and then the round ingot is sent into a two-roll skew rolling mill to perform skew rolling perforation and control: the total reduction rate is 13 percent, the reduction rate before jacking is 7 percent, the ovality coefficient is 1.15, the perforation speed is 0.2m/s, and the temperature is 1100 ℃, thus obtaining the perforated pipe;
(6) and (5) sending the perforated pipe in the step (5) to a three-roll continuous rolling mill for continuous rolling, and controlling: the total reduction rate is 15 percent, the ovality coefficient is 1.09, the perforation speed is 0.5m/s, and the temperature is 980 ℃, so as to obtain a continuous rolling pipe;
(7) feeding the continuously rolled pipe in the step (6) into a heating furnace, heating to 850 ℃, feeding the pipe into a sizing mill for sizing, and controlling the sizing rate to be 0.6m/s to obtain a seamless pipe;
(8) annealing the seamless pipe material obtained in the step (7) at 880 ℃ for 2h, and cooling to room temperature to obtain a Ti-Al-Nb-Zr-Mo alloy seamless pipe;
the Ti-Al-Nb-Zr-Mo alloy seamless tube comprises the following components: al: 6.03wt.%, Nb: 3.0wt.%, Zr: 2.01wt.%, 0.98wt.% Mo, and the balance Ti;
through mechanical property detection, the mechanical properties of each part can meet the requirements, and the obtained seamless pipe has the dimensions of phi 180 multiplied by 12 multiplied by 12542mm (outer diameter multiplied by wall thickness multiplied by length).
The metallographic structure is shown in FIG. 4.
The mechanical properties are shown in Table 3 and FIG. 7.
TABLE 3
| Sample number | Rm/MPa | Rp0.2/MPa | A/% |
| 1 | 914 | 806 | 12.8 |
| 2 | 906 | 801 | 12.4 |
| 3 | 910 | 810 | 12.6 |
| 4 | 908 | 807 | 13.4 |
| 5 | 912 | 809 | 13.1 |
| 6 | 915 | 812 | 12.8 |
| Mean value of | 911 | 807 | 12.9 |
As can be seen from the metallographic microstructure of the three embodiments shown in FIGS. 2, 3 and 4, the three embodiments are lamellar structures, and a large number of alpha-phase bundles are staggered with each other.
Fig. 5, fig. 6, and fig. 7 are mechanical property diagrams of three embodiments, respectively, and it can be seen that the uniformity of the mechanical properties is compared with the prior art: the mechanical properties of the cast ingot obtained by multiple VAR melting and the seamless tube obtained by oblique rolling and perforation after forging are shown in Table 4, and the mechanical properties of the three examples are all superior to those of the seamless tube obtained by the prior art in Table 4.
The properties of the seamless tube made of Ti-Al-Nb-Zr-Mo alloy by the conventional process are shown in Table 4
TABLE 4
| Alloy (I) | Rm/MPa | Rp0.2/MPa | A/% |
| TA31 | 880 | 785 | 12 |
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all the simple modifications, changes and equivalent structural changes of the above embodiments according to the technical spirit of the present invention still belong to the present invention.
Claims (3)
1. A short-process preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless tube is characterized by comprising the following steps:
(1) preparing materials according to the following mass ratio:
5.7-6.3 wt.% of aluminum niobium alloy
Aluminum bean 4.05-4.77 wt. -%)
Zirconium sponge 1.5-2.5 wt. -%)
1.5-1.7 wt.% of aluminum-molybdenum alloy
Titanium sponge balance
The total of the components is 100 wt.%;
(2) mixing the prepared materials in the step (1), taking a proper amount of mixture as bulk materials, pressing the rest of the mixture into blocks, drying the blocks at 100-120 ℃ for 5-6 hours, and cooling the blocks along with a furnace to obtain pressed blocks;
(3) laying the bulk material in the step (2) in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then putting a proper amount of briquetting material in the step (2) into a feeding area of the EB furnace;
(4) under a vacuum of 1.8X 10-3～3.5×10-3When torr, opening No. 1 to No. 5 electron guns to smelt the bulk material in the cooling bed, controlling the voltage of No. 1 to No. 5 electron guns to be 29.5 to 30.5KV and the current to be 3.3 to 4.3A, after smelting for 100 to 120min, closing the electron guns, cooling for 20 to 40min, pushing the briquetting material in the feeding area into the smelting area, simultaneously opening No. 1 to No. 7 electron guns to continue smelting, controlling the voltage of No. 1 to No. 7 electron guns to be 29.5 to 30.5KV, controlling the current of No. 1 to No. 2 electron guns to be 2.3 to 3.0A, the current of No. 3 to No. 4 electron guns to be 5.3 to 6A, the current of No. 5 electron guns to be 3.6 to 4.6A, the current of No. 6 to No. 7 electron guns to be 1.6 to 2.6A, simultaneously keeping the ingot pulling speed of 12 to 18mm/min, thus continuously pushing, melting and pulling ingots till the smelting is completed, then cooling to the ingot from a crystallizer, taking out, polishing the surface of the ingot, and peeling off the ingot, obtaining a Ti-Al-Nb-Zr-Mo alloy round ingot;
(5) and (4) punching centering holes at two ends of the Ti-Al-Nb-Zr-Mo alloy round ingot in the step (4), feeding the round ingot into a heating furnace, heating to 1100-1200 ℃, preserving heat for 6-8 h, feeding the round ingot into a two-roll skew rolling mill, performing skew rolling perforation, and controlling: the total reduction rate is 10-15%, the pre-top reduction rate is 6-8%, the ellipticity coefficient is 1.11-1.18, the perforation speed is 0.15-0.4 m/s, and the temperature is 1080-1120 ℃, so that a perforated pipe is obtained;
(6) and (5) sending the perforated pipe in the step (5) to a three-roll continuous rolling mill for continuous rolling, and controlling: the total reduction rate is 12-18%, the ovality coefficient is 1.05-1.15, the perforation speed is 0.3-0.6 m/s, and the temperature is 950-1000 ℃, so as to obtain a continuous rolling pipe;
(7) feeding the continuous rolling pipe in the step (6) into a reheating furnace, heating to 800-900 ℃, feeding into a sizing mill for sizing, and controlling the sizing rate to be 0.4-0.8 m/s to obtain a seamless pipe;
(8) and (4) annealing the seamless pipe material obtained in the step (7) at the temperature of 850-900 ℃ for 2-3 h, and cooling to room temperature to obtain the Ti-Al-Nb-Zr-Mo alloy seamless pipe.
2. The short-run production method of a Ti-Al-Nb-Zr-Mo alloy seamless tube according to claim 1, wherein in the step (5), after the Ti-Al-Nb-Zr-Mo alloy round ingot is heated, a glass powder lubricant is applied to one end near the plug before entering the cross rolling mill, and a glass powder lubricant wrapped with tinfoil is inserted into the centering hole to prevent defects from being generated on the inner wall of the tube during the perforation process.
3. The short-run production method of a Ti-Al-Nb-Zr-Mo alloy seamless tube according to claim 1, characterized in that said Ti-Al-Nb-Zr-Mo alloy seamless tube of step (8) has the composition: al: 5.5 wt.% to 6.5wt.%, Nb: 2.5wt.% to 3.5wt.%, Zr: 1.5-2.5 wt.%, 0.6-1.5 wt.% Mo, and the balance Ti.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106363022A (en) * | 2016-09-27 | 2017-02-01 | 天津钢管集团股份有限公司 | Method for improving quality of inner surface of titanium alloy seamless steel tube |
| CN109280787A (en) * | 2018-11-30 | 2019-01-29 | 西北有色金属研究院 | A kind of preparation method of petroleum gas industrial titanium alloy seamless tubular goods |
| CN109609782A (en) * | 2019-01-07 | 2019-04-12 | 云南钛业股份有限公司 | A kind of drawing ingot control method of EB furnace melting titanium/titanium alloy ingot |
| CN110004311A (en) * | 2019-03-22 | 2019-07-12 | 昆明理工大学 | It is a kind of for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe |
| CN110170543A (en) * | 2019-05-21 | 2019-08-27 | 北京科技大学 | A kind of titanium alloy seamless pipe short route processing method |
| CN110592425A (en) * | 2019-09-02 | 2019-12-20 | 中国船舶重工集团公司第七二五研究所 | High-impact-toughness titanium alloy and method for preparing seamless pipe by using titanium alloy |
| US20200056267A1 (en) * | 2017-03-27 | 2020-02-20 | South China University Of Technology | HIGH-STRENGTH AND LOW-MODULUS BETA-TYPE Si-CONTAINING TITANIUM ALLOY, PREPARATION METHOD THEREFOR AND USE THEREOF |
-
2020
- 2020-11-23 CN CN202011323764.6A patent/CN112718909B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106363022A (en) * | 2016-09-27 | 2017-02-01 | 天津钢管集团股份有限公司 | Method for improving quality of inner surface of titanium alloy seamless steel tube |
| US20200056267A1 (en) * | 2017-03-27 | 2020-02-20 | South China University Of Technology | HIGH-STRENGTH AND LOW-MODULUS BETA-TYPE Si-CONTAINING TITANIUM ALLOY, PREPARATION METHOD THEREFOR AND USE THEREOF |
| CN109280787A (en) * | 2018-11-30 | 2019-01-29 | 西北有色金属研究院 | A kind of preparation method of petroleum gas industrial titanium alloy seamless tubular goods |
| CN109609782A (en) * | 2019-01-07 | 2019-04-12 | 云南钛业股份有限公司 | A kind of drawing ingot control method of EB furnace melting titanium/titanium alloy ingot |
| CN110004311A (en) * | 2019-03-22 | 2019-07-12 | 昆明理工大学 | It is a kind of for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe |
| CN110170543A (en) * | 2019-05-21 | 2019-08-27 | 北京科技大学 | A kind of titanium alloy seamless pipe short route processing method |
| CN110592425A (en) * | 2019-09-02 | 2019-12-20 | 中国船舶重工集团公司第七二五研究所 | High-impact-toughness titanium alloy and method for preparing seamless pipe by using titanium alloy |
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