CN112718909B - Short-flow preparation method of Ti-Al-Nb-Zr-Mo alloy seamless pipe - Google Patents
Short-flow preparation method of Ti-Al-Nb-Zr-Mo alloy seamless pipe Download PDFInfo
- Publication number
- CN112718909B CN112718909B CN202011323764.6A CN202011323764A CN112718909B CN 112718909 B CN112718909 B CN 112718909B CN 202011323764 A CN202011323764 A CN 202011323764A CN 112718909 B CN112718909 B CN 112718909B
- Authority
- CN
- China
- Prior art keywords
- electron gun
- pipe
- alloy
- seamless pipe
- ingot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a short-flow preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless pipe, which is characterized by comprising the following steps of: 1) preparing materials, 2) mixing materials and briquetting, 3) placing the materials in an electron beam gun EB furnace, 4) vacuum smelting to obtain a Ti-Al-Nb-Zr-Mo alloy round ingot, 5) punching centering holes at two ends of the ingot, delivering a two-roll oblique rolling mill to perform oblique rolling perforation, 6) delivering a three-roll continuous rolling mill to perform continuous rolling, 7) heating and sizing to obtain a seamless pipe, and 8) annealing to obtain the Ti-Al-Nb-Zr-Mo alloy seamless pipe. The obtained pipe has the advantages of uniform components and tissues, less high-low density inclusions, high purity, short process flow, mechanical property superior to the prior art, improvement of the comprehensive yield to about 85%, reduction of the production cost by 20-30% and obvious market application prospect.
Description
Technical Field
The invention relates to a short-flow preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless pipe, belonging to the technical field of nonferrous metal rolling.
Background
The Ti-6Al-3Nb-2Zr-1Mo titanium alloy (namely TA31 titanium alloy) has the advantages of small density, high specific strength, good plasticity and corrosion resistance, higher fracture toughness, stress corrosion fracture toughness, impact toughness, weldability and the like, and particularly has outstanding seawater resistance and marine atmospheric corrosion resistance, thus being 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 method has wide application prospect in the fields of offshore oil drilling platforms, ocean engineering equipment, ships, submarines, deep submarines, 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 sponge titanium and alloy raw materials, pressing and welding to form an electrode, smelting the electrode into a round ingot by a vacuum consumable arc furnace (VAR) for 2-3 times, forging the round ingot, then drilling, extruding or obliquely rolling and perforating, and finally preparing the TA31 titanium alloy seamless tubes with different specifications and purposes by processes of rolling, drawing, spinning and the like. Obviously, the prior art has the defects of long process flow, low comprehensive yield, difficult obtainment of ultra-long pipes and the like, so that the cost of the TA31 titanium alloy seamless pipe is high, and the application is greatly limited. Accordingly, there is a need for improvements in the art.
Disclosure of Invention
In order to overcome the defects of the prior TA31 titanium alloy seamless tube preparation method, the invention provides a short-flow preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless tube, which is characterized by comprising the following steps:
(1) The materials are prepared according to the following mass ratio:
5.7 to 6.3 weight percent of aluminum-niobium alloy
4.05 to 4.77 weight percent of aluminum beans
1.5 to 2.5 weight percent of sponge zirconium
1.5 to 1.7 weight percent of aluminum molybdenum alloy
Titanium sponge balance
The sum of the components is 100 wt percent;
(2) Mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, uniformly pressing the rest of the mixture into blocks, drying at 100-120 ℃ for 5-6 h, and cooling along with a furnace to obtain pressed blocks;
(3) The bulk material in the step (2) is laid in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then a proper amount of pressing blocks in the step (2) are put into a feeding area of the EB furnace;
(4) At a vacuum level of 1.8X10 -3 ～3.5×10 -3 When in torr, starting an electron gun 1-5 to smelt bulk materials in a cooling bed, controlling the voltage of the electron gun 1-5 to 29.5KV, the current of the electron gun 3.3-4.3A, smelting for 100-120 min, closing the electron gun, cooling for 20-40 min, pushing a briquetting material in a feeding area into a smelting area, simultaneously starting the electron gun 1-7 to continue smelting, controlling the voltage of the electron gun 1-7 to 29.5-30.5 KV, the current of the electron gun 1-2 to 2.3-3.0A, the current of the electron gun 3-4 to 5.3-6A, the current of the electron gun 5 to 3.6-4.6A, and the current of the electron gun 6-7 to 1.6-2.6A, simultaneously keeping the ingot pulling speed of 12-18 mm/min, continuously pushing, smelting and ingot pulling until smelting is completed, cooling to 80-100 ℃, taking out the ingot from a crystallizer, cooling to room temperature, and carrying out skin removing and polishing treatment on the ingot to obtain a round Ti-Al-Mo-Nb alloy;
(5) 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 to heat to 1100-1200 ℃, preserving heat for 6-8 h, feeding the round ingot into a two-roll diagonal mill to perform diagonal rolling perforation, and controlling: the total rolling reduction is 10-15%, the rolling reduction before top 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 as to obtain perforated pipe;
(6) Feeding the perforated pipe in the step (5) into a three-roller continuous rolling mill for continuous rolling, and controlling: the total rolling reduction is 12-18%, the ellipticity 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 the tandem rolling pipe;
(7) Feeding the continuous rolling 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 speed to be 0.4-0.8 m/s to obtain a seamless pipe;
(8) And (3) annealing the seamless pipe in the step (7) for 2-3 hours at the temperature of 850-900 ℃, 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, a glass powder lubricant is required to be smeared at one end close to the plug before entering the diagonal rolling mill, and meanwhile, the glass powder lubricant wrapped by tinfoil is plugged into the centering hole, so that defects on the inner wall of the pipe in the perforation process are prevented.
The Ti-Al-Nb-Zr-Mo alloy seamless pipe in the step (8) comprises the following components: al:5.5 wt.% to 6.5wt.%, nb:2.5 wt.% to 3.5wt.%, zr:1.5 0.6 to 1.5wt.% of Mo, and the balance of Ti.
The invention has the following advantages and beneficial effects: the Ti-Al-Nb-Zr-Mo alloy seamless pipe obtained by adopting the technical scheme has the advantages of 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 perforating machine to prepare a perforated seamless pipe, and then carries out three-roll continuous rolling, sizing and annealing to obtain the product, thereby shortening the technological process of the titanium alloy seamless pipe and having mechanical properties superior to those of the prior art. The invention has simple process, convenient operation and short process flow, improves the comprehensive yield of the seamless pipe 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 of a tube obtained in example 1 of the present invention.
FIG. 3 is a metallographic structure of a tube obtained in example 2 of the present invention.
FIG. 4 is a metallographic structure of a tube obtained in example 3 of the present invention.
FIG. 5 is a graph showing the mechanical properties of the pipe obtained in example 1 of the present invention.
FIG. 6 is a graph showing the mechanical properties of the pipe obtained in example 2 of the present invention.
FIG. 7 is a graph showing the mechanical properties of the pipe obtained in example 3 of the present invention.
Detailed Description
The invention will be described in further detail with reference to specific embodiments, but the scope of the invention is not limited to the description.
Example 1
A short-flow preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless pipe is characterized by comprising the following steps:
(1) The materials are prepared according to the following mass ratio:
5.7 wt% of aluminum-niobium alloy
Aluminum beans 4.05wt.%
Zirconium sponge 1.5wt.%
1.5 wt% of aluminum molybdenum alloy
87.25wt.% of titanium sponge;
(2) Mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, uniformly pressing the rest of the mixture into blocks, drying at 100 ℃ for 6 hours, and cooling along with a furnace to obtain pressed blocks;
(3) The bulk material in the step (2) is laid in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then a proper amount of pressing blocks in the step (2) are put into a feeding area of the EB furnace;
(4) At a vacuum level of 1.8X10 -3 When in torr, starting an electron gun 1-5 to smelt bulk materials in a cooling bed, controlling the voltages of the electron gun 1-5 to 29.5KV and the current of the electron gun 1-5 to 3.3A, closing the electron gun after smelting for 100min, cooling for 20min, pushing a briquetting material in a feeding area into a smelting area, simultaneously starting the electron gun 1-7 to continue smelting, controlling the voltages of the electron gun 1-7 to 29.5KV, the electron gun 1-2 to 2.3A and the electron gun 3-4 to 5.3A and the electron gun 5 to 3.6A and the electron gun 6-7 to 1.6A, simultaneously keeping the ingot pulling speed of 12mm/min, continuously pushing, melting and pulling ingots until smelting is completed, cooling to 80 ℃, taking out an ingot from a crystallizer, cooling to room temperature, and carrying out surface peeling and polishing treatment to obtain Ti-Al-Nb-Zr-Mo alloy round ingots;
(5) After centering holes are drilled at two ends of the Ti-Al-Nb-Zr-Mo alloy round ingot in the step (4), heating to 1100 ℃ in a heating furnace, preserving heat for 8 hours, rapidly smearing a proper amount of glass powder lubricant at one end close to a plug after discharging, simultaneously plugging the glass powder lubricant wrapped by tinfoil into the centering holes so as to prevent defects on the inner wall of the pipe in the perforation process, then feeding the pipe into a two-roller oblique rolling mill for oblique rolling perforation, and controlling: the total rolling reduction is 10%, the rolling reduction before top is 6%, the ellipticity coefficient is 1.11, the perforation speed is 0.15m/s, and the temperature is 1080 ℃, so as to obtain a perforated pipe;
(6) Feeding the perforated pipe in the step (5) into a three-roller continuous rolling mill for continuous rolling, and controlling: the total rolling reduction is 12%, the ellipticity coefficient is 1.05, the perforation speed is 0.3m/s, and the temperature is 950 ℃, so as to obtain the tandem rolling pipe;
(7) Feeding the continuous rolling 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 speed to be 0.4m/s to obtain a seamless pipe;
(8) Annealing the seamless pipe in the step (7) for 3 hours at 850 ℃, and cooling to room temperature to obtain a Ti-Al-Nb-Zr-Mo alloy seamless pipe;
the Ti-Al-Nb-Zr-Mo alloy seamless pipe comprises the following components: al:58wt.%, nb:2.98wt.%, zr:2.00wt.%, mo 1.02wt.%, the balance being Ti;
the mechanical property of each part of the annealed seamless pipe can meet the requirement through mechanical property detection, and the size of the obtained seamless pipe is phi 180 multiplied by 12 multiplied by 11452mm (external diameter multiplied by wall thickness multiplied by length).
The mechanical properties are shown in Table 1 and FIG. 5:
TABLE 1
| Sample numbering | R m /MPa | R p0.2 /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 |
| Average value of | 905 | 799 | 12.7 |
The metallographic structure is shown in figure 2.
Example 2
A short-flow preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless pipe is characterized by comprising the following steps:
(1) The materials are prepared according to the following mass ratio:
6.3 wt% of aluminum-niobium alloy
Aluminum beans 4.77wt.%
Zirconium sponge 2.5wt.%
1.7 wt% of aluminum molybdenum alloy
84.73wt.% of titanium sponge;
(2) Mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, uniformly pressing the rest of the mixture into blocks, drying at 120 ℃ for 5 hours, and cooling along with a furnace to obtain pressed blocks;
(3) The bulk material in the step (2) is laid in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then a proper amount of pressing blocks in the step (2) are put into a feeding area of the EB furnace;
(4) At a vacuum level of 3.5X10 -3 When in torr, starting an electron gun 1-5 to smelt bulk materials in a cooling bed, controlling the voltages of the electron gun 1-5 to be 30.5KV, controlling the currents to be 4.3A, closing the electron gun after smelting for 120min, cooling for 40min, pushing a briquetting material in a feeding area into a smelting area, simultaneously starting the electron gun 1-7 to continue smelting, controlling the voltages of the electron gun 1-7 to be 30.5KV, the electron gun 1-2 to be 3.0A, the electron gun 3-4 to be 6A, the electron gun 5 to be 4.6A and the electron gun 6-7 to be 2.6A, simultaneously keeping the ingot pulling speed of 18mm/min, continuously pushing, smelting and ingot pulling until smelting is completed, cooling to 100 ℃, taking out the ingot from a crystallizer, cooling to room temperature, and carrying out 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 in the step (4), feeding the round ingot into a heating furnace, heating to 1200 ℃, preserving heat for 6 hours, rapidly smearing a proper amount of glass powder lubricant at one end close to a plug after discharging, simultaneously plugging the glass powder lubricant wrapped by tinfoil into the centering holes so as to prevent defects on the inner wall of the pipe in the perforation process, feeding the round ingot into a two-roller oblique rolling mill for oblique rolling perforation, and controlling: the total rolling reduction is 15%, the rolling reduction before top is 8%, the ellipticity coefficient is 1.18, the perforation speed is 0.4m/s, and the temperature is 1120 ℃, so as to obtain a perforated pipe;
(6) Feeding the perforated pipe in the step (5) into a three-roller continuous rolling mill for continuous rolling, and controlling: the total rolling reduction is 18%, the ellipticity coefficient is 1.15, the perforation speed is 0.6m/s, and the temperature is 1000 ℃, so as to obtain a tandem rolling pipe;
(7) Feeding the continuous rolling 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 speed to be 0.8m/s to obtain a seamless pipe;
(8) Annealing the seamless pipe in the step (7) for 2 hours at 900 ℃, and cooling to room temperature to obtain a Ti-Al-Nb-Zr-Mo alloy seamless pipe;
the Ti-Al-Nb-Zr-Mo alloy seamless pipe comprises the following components: al:6.12wt.%, nb: 3.02wt.%, zr:2.03wt.% Mo 1.00wt.%, balance Ti;
the mechanical properties are shown in Table 2 and FIG. 6:
TABLE 2
| Sample numbering | R m /MPa | R p0.2 /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 |
| Average value of | 916 | 810 | 12.8 |
The mechanical properties of the obtained seamless pipe can meet the requirements through mechanical property detection, and the size of the obtained seamless pipe is phi 180 multiplied by 12 multiplied by 11802mm (external diameter multiplied by wall thickness multiplied by length).
The metallographic structure is shown in figure 3.
Example 3
A short-flow preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless pipe is characterized by comprising the following steps:
(1) The materials are prepared according to the following mass ratio:
6.0 wt% of aluminum-niobium alloy
Aluminum beans 4.62wt.%
Zirconium sponge 2.00wt.%
1.6 wt% of aluminum molybdenum alloy
58.78wt.% titanium sponge;
(2) Mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, uniformly pressing the rest of the mixture into blocks, drying at 110 ℃ for 5 hours, and cooling along with a furnace to obtain pressed blocks;
(3) The bulk material in the step (2) is laid in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then a proper amount of pressing blocks in the step (2) are put into a feeding area of the EB furnace;
(4) At a vacuum level of 2.6X10 -3 When in torr, starting an electron gun 1-5 to smelt bulk materials in a cooling bed, controlling the voltages of the electron gun 1-5 to be 30KV, controlling the current to be 3.8A, closing the electron gun after smelting for 110min, cooling for 30min, pushing a briquetting material in a feeding area into a smelting area, simultaneously starting the electron gun 1-7 to continue smelting, controlling the voltages of the electron gun 1-7 to be 30KV, the electron gun 1-2 to be 2.8A, the electron gun 3-4 to be 5.8A, the electron gun 5 to be 4.1A, and the electron gun 6-7 to be 1.9A, simultaneously keeping the ingot pulling speed of 15mm/min, continuously pushing, melting and pulling ingots until smelting is completed, cooling to 90 ℃, taking out the ingots from a crystallizer, cooling to room temperature, and carrying out surface peeling and polishing treatment to obtain Ti-Al-Nb-Zr-Mo alloy round ingots;
(5) After centering holes are drilled at two ends of the Ti-Al-Nb-Zr-Mo alloy round ingot in the step (4), heating to 1150 ℃ in a heating furnace, preserving heat for 7 hours, rapidly smearing a proper amount of glass powder lubricant at one end close to a plug after discharging, simultaneously plugging the glass powder lubricant wrapped by tinfoil into the centering holes so as to prevent defects on the inner wall of the pipe in the perforation process, and then feeding the pipe into a two-roller oblique rolling mill for oblique rolling perforation and control: the total rolling reduction is 13%, the rolling reduction before top is 7%, the ellipticity coefficient is 1.15, the perforation speed is 0.2m/s, and the temperature is 1100 ℃, so as to obtain a perforated pipe;
(6) Feeding the perforated pipe in the step (5) into a three-roller continuous rolling mill for continuous rolling, and controlling: the total rolling reduction is 15%, the ellipticity coefficient is 1.09, the perforation speed is 0.5m/s, and the temperature is 980 ℃, so as to obtain a tandem rolling pipe;
(7) Feeding the continuous rolling 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 speed to be 0.6m/s to obtain a seamless pipe;
(8) Annealing the seamless pipe in the step (7) for 2 hours at the temperature of 880 ℃, and cooling to room temperature to obtain a Ti-Al-Nb-Zr-Mo alloy seamless pipe;
the Ti-Al-Nb-Zr-Mo alloy seamless pipe comprises the following components: al:6.03wt.%, nb:3.0wt.%, zr:2.01wt.%, 0.98wt.% Mo, the balance being Ti;
the mechanical properties of the obtained seamless pipe can meet the requirements through mechanical property detection, and the size of the obtained seamless pipe is phi 180 multiplied by 12 multiplied by 12542mm (external diameter multiplied by wall thickness multiplied by length).
The metallographic structure is shown in figure 4.
The mechanical properties are shown in Table 3 and FIG. 7.
TABLE 3 Table 3
| Sample numbering | R m /MPa | R p0.2 /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 |
| Average value of | 911 | 807 | 12.9 |
As can be seen from the metallographic microstructures of the three embodiments of fig. 2, 3 and 4, all three embodiments are lamellar structures, and a large number of alpha-phase bundles are mutually staggered.
Fig. 5, 6 and 7 are respectively mechanical property diagrams of three embodiments, and it can be seen that the uniformity of the mechanical properties is as follows compared with the prior art: the mechanical properties of the cast ingot obtained by repeated VAR smelting and the seamless pipe obtained by oblique rolling perforation after forging are shown in the table 4, and the mechanical properties of the three embodiments are superior to those of the seamless pipe obtained by the prior art in the table 4.
The properties of the seamless tube under the conventional process of Ti-Al-Nb-Zr-Mo alloy are shown in Table 4
TABLE 4 Table 4
| Alloy | R m /MPa | R p0.2 /MPa | A/% |
| TA31 | 880 | 785 | 12 |
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, alterations and equivalent structural changes may be made to the above embodiments according to the technical principles of the present invention.
Claims (2)
1. A short-flow preparation method of a Ti-Al-Nb-Zr-Mo alloy seamless pipe is characterized by comprising the following steps:
(1) The materials are prepared according to the following mass ratio:
5.7 to 6.3 weight percent of aluminum-niobium alloy
4.05 to 4.77 weight percent of aluminum beans
1.5 to 2.5 weight percent of sponge zirconium
1.5 to 1.7 weight percent of aluminum molybdenum alloy
Titanium sponge balance
The sum of the components is 100 wt percent;
(2) Mixing the prepared materials in the step (1), taking a proper amount of the mixture as bulk materials, uniformly pressing the rest of the mixture into blocks, drying at 100-120 ℃ for 5-6 h, and cooling along with a furnace to obtain pressed blocks;
(3) The bulk material in the step (2) is laid in a cooling bed of an EB furnace provided with a seven-rod electron gun, and then a proper amount of pressing blocks in the step (2) are put into a feeding area of the EB furnace;
(4) At a vacuum level of 1.8X10 -3 ～3.5×10 -3 When in torr, starting an electron gun 1-5 to smelt bulk materials in a cooling bed, controlling the voltage of the electron gun 1-5 to 29.5KV, the current of the electron gun 3.3-4.3A, smelting for 100-120 min, closing the electron gun, cooling for 20-40 min, pushing a briquetting material in a feeding area into a smelting area, simultaneously starting the electron gun 1-7 to continue smelting, controlling the voltage of the electron gun 1-7 to 29.5-30.5 KV, the current of the electron gun 1-2 to 2.3-3.0A, the current of the electron gun 3-4 to 5.3-6A, the current of the electron gun 5 to 3.6-4.6A, and the current of the electron gun 6-7 to 1.6-2.6A, simultaneously keeping the ingot pulling speed of 12-18 mm/min, continuously pushing, smelting and ingot pulling until smelting is completed, cooling to 80-100 ℃, taking out the ingot from a crystallizer, cooling to room temperature, and carrying out skin removing and polishing treatment on the ingot to obtain a round Ti-Al-Mo-Nb alloy;
(5) 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 to heat to 1100-1200 ℃, preserving heat for 6-8 h, feeding the round ingot into a two-roll diagonal mill to perform diagonal rolling perforation, and controlling: the total rolling reduction is 10-15%, the rolling reduction before top 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 as to obtain perforated pipe;
before the two-roller oblique rolling mill is sent, a glass powder lubricant is required to be smeared at one end close to the plug, and meanwhile, the glass powder lubricant wrapped by tinfoil is plugged into the centering hole, so that defects on the inner wall of the pipe in the perforation process are prevented;
(6) Feeding the perforated pipe in the step (5) into a three-roller continuous rolling mill for continuous rolling, and controlling: the total rolling reduction is 12-18%, the ellipticity 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 the tandem rolling pipe;
(7) Feeding the continuous rolling pipe in the step (6) into a reheating furnace, heating to 800-900 ℃, feeding the pipe into a sizing mill for sizing, and controlling the sizing speed to be 0.4-0.8 m/s to obtain a seamless pipe;
(8) And (3) annealing the seamless pipe in the step (7) for 2-3 hours at the temperature of 850-900 ℃, and cooling to room temperature to obtain the Ti-Al-Nb-Zr-Mo alloy seamless pipe.
2. The short-flow preparation method of the Ti-Al-Nb-Zr-Mo alloy seamless pipe according to claim 1, wherein the Ti-Al-Nb-Zr-Mo alloy seamless pipe in the step (8) comprises the following components: al:5.5 wt.% to 6.5wt.%, nb:2.5 wt.% to 3.5wt.%, zr:1.5 0.6 to 1.5wt.% of Mo, and the balance of Ti.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011323764.6A CN112718909B (en) | 2020-11-23 | 2020-11-23 | Short-flow preparation method of Ti-Al-Nb-Zr-Mo alloy seamless pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011323764.6A CN112718909B (en) | 2020-11-23 | 2020-11-23 | Short-flow preparation method of Ti-Al-Nb-Zr-Mo alloy seamless pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112718909A CN112718909A (en) | 2021-04-30 |
| CN112718909B true CN112718909B (en) | 2023-09-15 |
Family
ID=75597714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011323764.6A Active CN112718909B (en) | 2020-11-23 | 2020-11-23 | Short-flow preparation method of Ti-Al-Nb-Zr-Mo alloy seamless pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112718909B (en) |
Citations (6)
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107034383B (en) * | 2017-03-27 | 2018-09-14 | 华南理工大学 | One kind is containing high-strength low mould β-Type Titanium Alloys of Si and the preparation method and application thereof |
-
2020
- 2020-11-23 CN CN202011323764.6A patent/CN112718909B/en active Active
Patent Citations (6)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112718909A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4433230B2 (en) | High-strength Ni-base alloy tube for nuclear power and its manufacturing method | |
| CN103849803B (en) | Tantalum alloy and method for preparing tantalum alloy tube | |
| CN112695255B (en) | Preparation method of ferrite martensite steel clad tube | |
| CN110935827B (en) | Forging method of large-specification fine-grain austenitic stainless steel SNCrW bar | |
| CN106181131A (en) | Solid core welding wire preparation method for the welding of anti-fused salt corrosion nickel base superalloy | |
| CN103639233B (en) | Manufacture the method for 40MPa level super-pressure gas cylinder forging seamless steel pipe | |
| CN102282273A (en) | Process for production of duplex stainless steel pipe | |
| CN108611529B (en) | Microcrystal high-strength corrosion-resistant titanium alloy pipe and preparation method thereof | |
| JPWO2007111131A1 (en) | Seamless pipe manufacturing method | |
| CN114160604A (en) | Stainless steel seamless pipe and preparation method and application thereof | |
| CN113223755A (en) | High-strength and high-corrosion-resistance copper-stainless steel composite wire and preparation method thereof | |
| CN112264732A (en) | Welding wire for copper/steel dissimilar welding, preparation method of welding wire and copper/steel dissimilar welding method | |
| EP4273290A1 (en) | Hot-rolled steel plate for low-cost high temperature enameling, and manufacturing method therefor | |
| CN113695417B (en) | Preparation method of large-caliber high-performance titanium alloy pipe and product thereof | |
| CN112718909B (en) | Short-flow preparation method of Ti-Al-Nb-Zr-Mo alloy seamless pipe | |
| CN110788141B (en) | Seamless steel tube, manufacturing method and high-pressure gas cylinder thereof | |
| CN109825675A (en) | Heat exchanger tube and preparation method thereof for Steam Generators in Liquid Metal Fast Breeder Reactor | |
| CN114107834A (en) | High-strength iron-nickel-molybdenum alloy wire and low-cost preparation method thereof | |
| CN112718870B (en) | Short-process preparation method of Ti-Al-V-Fe alloy seamless tube | |
| CN117086125A (en) | Preparation method of near alpha titanium alloy seamless tube | |
| EP2656931A1 (en) | PRODUCTION METHOD FOR ROUND STEEL BAR FOR SEAMLESS PIPE COMPRISING HIGH Cr-Ni ALLOY, AND PRODUCTION METHOD FOR SEAMLESS PIPE USING ROUND STEEL BAR | |
| JPS61213362A (en) | Production of composite coated pipe for nuclear fuel and product | |
| CN114855084B (en) | Hot-rolled round steel for 120ksi steel grade high-strength high-toughness high-grade sulfur-resistant drill rod joint and preparation method thereof | |
| CN115029641A (en) | Fixed expansion alloy plate with good plasticity and preparation method thereof | |
| CN114433654A (en) | Preparation method of TC4 seamless pipe with short flow and low cost |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |