CN113957367A - Method for regulating and controlling residual stress of inner surface and outer surface of titanium alloy pipe - Google Patents
Method for regulating and controlling residual stress of inner surface and outer surface of titanium alloy pipe Download PDFInfo
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Abstract
The invention provides a method for regulating and controlling residual stress of the inner surface and the outer surface of a titanium alloy pipe, which comprises the following steps: processing the titanium alloy pipe according to optimized cold rolling process parameters in a cold rolling process to obtain a cold-rolled titanium alloy pipe; processing the titanium alloy pipe subjected to cold rolling according to the optimized annealing treatment parameters in a vacuum annealing treatment process to obtain the titanium alloy pipe subjected to annealing treatment; and carrying out magnetic polishing treatment on the annealed titanium alloy pipe to realize synchronous regulation and control of the residual stress of the inner surface and the outer surface of the titanium alloy pipe. The scheme provided by the invention can realize synchronous regulation and control of the residual stress of the inner surface and the outer surface of the pipe, improve the corrosion resistance, fatigue resistance and other properties of the titanium alloy pipe, and simultaneously improve the surface quality and precision of the target pipe.
Description
Technical Field
The invention relates to the technical field of titanium alloy pipe processing, in particular to a method for regulating and controlling residual stress of the inner surface and the outer surface of a titanium alloy pipe.
Background
The pipeline system is a key lightweight component with important effects of fluid transmission and the like in high-end equipment in the fields of aerospace and the like, the materials and specifications are various and large in quantity and wide in range, the safety and the seaworthiness of an aircraft can be directly influenced by the advantages and disadvantages of the performance of the component, and the titanium alloy pipe is an ideal light high-strength material and has been widely applied to pipeline systems of hydraulic, fuel oil, environmental control and the like of the aircraft due to the characteristics of small density, high specific strength, good mechanical performance and the like. However, the pipe is often in severe environments such as high/low temperature, high pressure, vibration or oil gas corrosion for a long time in the service process, the surface residual stress state can obviously affect the anti-fatigue and corrosion performances of the pipe in the service process, and a large number of researches show that the surface residual compressive stress state of the material and the part can effectively inhibit the surface crack initiation and propagation under the fatigue loading condition, so that the fatigue performance is improved. Therefore, how to optimize the cold rolling forming process of the titanium alloy pipe to introduce the residual compressive stress on the surface of the pipe is the key to improve the service performance of the pipe.
At present, the residual stress regulation and control method of the seamless pipe mainly focuses on eliminating the residual stress after cold machining through annealing, straightening and other means, but cannot introduce the residual compressive stress on the surface of the pipe.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for processing a titanium alloy pipe, so that residual compressive stress is introduced into the inner surface and the outer surface of the pipe, and the fatigue resistance of the pipe is improved.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for regulating and controlling residual stress of the inner surface and the outer surface of a titanium alloy pipe comprises the following steps:
processing the titanium alloy pipe according to optimized cold rolling process parameters in a cold rolling process to obtain a cold-rolled titanium alloy pipe;
processing the titanium alloy pipe subjected to the cold rolling treatment according to the optimized annealing treatment parameters in the annealing treatment process to obtain the titanium alloy pipe subjected to the annealing treatment;
and carrying out magnetic polishing treatment on the annealed titanium alloy pipe to realize synchronous regulation and control of the residual stress of the inner surface and the outer surface of the titanium alloy pipe.
Optionally, the titanium alloy pipe is rolled according to the optimized cold rolling process parameters in the cold rolling process of the titanium alloy pipe to obtain the cold rolled titanium alloy pipe, which includes:
and (4) processing the titanium alloy pipe according to the optimized Q value and deformation in the cold rolling process to obtain the cold-rolled titanium alloy pipe.
Optionally, the Q value is greater than 2, and the deformation amount is 45-60%
Optionally, the annealing treatment process of the titanium alloy tube after cold rolling is performed according to the optimized annealing treatment parameters, so as to obtain the titanium alloy tube after annealing treatment, and the annealing treatment process includes:
and (3) carrying out annealing treatment on the titanium alloy pipe subjected to the cold rolling treatment according to the stress relief annealing temperature of 450-550 ℃ and the heat preservation time of 2h to obtain the annealed titanium alloy pipe.
Optionally, the magnetic polishing treatment is performed on the annealed titanium alloy pipe, and includes:
and placing the titanium alloy pipe subjected to annealing treatment into a magnetic polishing machine for magnetic polishing treatment.
Optionally, the titanium alloy tube after annealing treatment is placed into a magnetic polishing machine for magnetic polishing treatment, including:
placing the magnetic steel needle and the annealed titanium alloy pipe into a polishing barrel of the magnetic polishing machine;
and adding a mixed solution of a polishing agent and water into the polishing barrel, and polishing the titanium alloy pipe in the polishing barrel.
Optionally, the diameter range of the magnetic steel needle is 0.15 mm-1 mm, and the length of the steel needle is 3-5 mm.
Optionally, the rotating speed of a motor of the magnetic polishing machine is set to be greater than 2500 revolutions, and the polishing time is set to be 12-15 min.
Optionally, the ratio of the polishing agent to water is 2: 100.
optionally, the magnetic polishing treatment is performed on the annealed titanium alloy pipe, and the magnetic polishing treatment includes:
and performing magnetic polishing treatment on the titanium alloy pipe with the length less than 500mm by adopting a rotary magnetic polishing process, and performing magnetic polishing treatment on the titanium alloy pipe with the length more than 500mm by adopting a translational magnetic polishing process.
The scheme of the invention at least comprises the following beneficial effects:
according to the scheme, the cold rolling and annealing process is optimized, the residual stress of the inner surface and the outer surface of the pipe can be changed, the magnetic polishing process is added, the surface quality and the precision of the finished pipe can be effectively improved, the residual compressive stress is introduced to the surface of the pipe, and the corrosion resistance, the fatigue resistance and other performances of the pipe are further improved.
Drawings
FIG. 1 is a flow chart of a method for regulating and controlling the stress on the inner and outer surfaces of a titanium alloy pipe according to an embodiment of the present invention;
FIG. 2 is a characteristic diagram of distribution of residual stress on the inner and outer surfaces of a pipe after two-roll cold rolling according to an embodiment of the present invention;
FIG. 3 is a characteristic diagram of distribution of residual stress on the inner and outer surfaces of a tube after three-roll cold rolling according to an embodiment of the present invention;
FIG. 4 is a graph of residual stresses on the inner and outer surfaces of a pipe corresponding to different Q values according to an embodiment of the present invention;
FIG. 5 is a graph of the residual stress on the inner and outer surfaces of the pipe corresponding to different deformation amounts according to an embodiment of the present invention;
FIG. 6 is an SEM image of the outer surface of the tube after magnetic polishing treatment according to the embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a method for regulating and controlling residual stress on an inner surface and an outer surface of a titanium alloy pipe, where the method includes:
and step 13, performing magnetic polishing treatment on the annealed titanium alloy pipe to realize synchronous regulation and control of the residual stress of the inner surface and the outer surface of the titanium alloy pipe.
In this embodiment, the residual stresses on the inner and outer surfaces of the titanium alloy tube include residual tensile stresses and residual compressive stresses. The titanium alloy pipe is subjected to cold rolling and annealing treatment, in the cold rolling and annealing treatment processes, the cold rolling and annealing process parameters are optimized respectively to change the residual stress of the inner surface and the outer surface of the titanium alloy pipe, so that the regulation and control of the subsequent steps are facilitated, finally, the residual compressive stress is introduced into the inner surface and the outer surface of the titanium alloy pipe through magnetic polishing treatment, the residual compressive stress of the inner surface and the outer surface of the titanium alloy pipe is integrally increased, the fatigue resistance of the titanium alloy pipe is improved, and meanwhile, the quality and the precision of the inner surface and the outer surface of the titanium alloy pipe can be further improved through the magnetic polishing treatment.
In an alternative embodiment of the present invention, the step 11 may include:
and step 111, processing the titanium alloy pipe according to the optimized Q value and deformation in a cold rolling process to obtain the cold-rolled titanium alloy pipe. In the embodiment, the Q value is the ratio of the relative wall reduction amount and the relative diameter reduction amount of the titanium alloy pipe, and the deformation amount is the reduction ratio of the sectional area of the pipe; in the cold rolling process, the residual stress of the inner surface and the outer surface of the titanium alloy pipe is regulated and controlled by optimizing the Q value and the deformation, so that the residual tensile stress of the outer surface of the titanium alloy pipe is further reduced, and the residual compressive stress of the inner surface of the titanium alloy pipe is improved.
Preferably, when the Q value is greater than 2 and the deformation is controlled to be 45-60%, the residual tensile stress on the outer surface of the pipe can be reduced, the residual compressive stress on the inner surface of the pipe can be improved, and meanwhile, the radial texture strength of the pipe can also be improved.
In an alternative embodiment of the present invention, the step 12 may include:
and step 121, carrying out treatment on the titanium alloy pipe subjected to the cold rolling treatment in a vacuum annealing treatment process according to the stress relief annealing temperature of 450-550 ℃ and the heat preservation time of 2h to obtain the titanium alloy pipe subjected to the annealing treatment.
In this embodiment, the titanium alloy tube after cold rolling is subjected to vacuum stress relief annealing treatment, so that the residual stress of the inner surface and the outer surface of the titanium alloy tube after cold rolling can be further optimized; preferably, the stress relief annealing temperature is controlled within the range of 450 ℃ to 550 ℃.
In an optional embodiment of the present invention, the step 13 may include:
and 131, placing the annealed titanium alloy pipe into a magnetic polishing machine for magnetic polishing.
In an optional embodiment of the present invention, the step 131 may include:
step 1311, placing the magnetic steel needle and the annealed titanium alloy pipe into a polishing barrel of the magnetic polishing machine;
and 1312, adding a mixed solution of a polishing agent and water into the polishing barrel, and polishing the titanium alloy pipe in the polishing barrel.
In the embodiment, the polishing barrel can be made of nonmetal materials such as PVC and the like, so that the steel needle and the titanium alloy pipe can be uniformly and randomly turned in the polishing barrel; the amount of the mixed solution of the polishing agent and the water needs to cover the titanium alloy pipe, so that the titanium alloy pipe can be fully contacted with the solution in the whole polishing process, and the polishing is more uniform.
The magnetic steel needle can be a 304 stainless steel needle cylinder, the diameter range of the magnetic steel needle is 0.15-1 mm, and the length of the magnetic steel needle is 3-5 mm.
The rotating speed of a motor of the magnetic polishing machine is set to be more than 2500 revolutions, and the polishing time is set to be 12-15 min.
The ratio of the polishing agent to the water is 2: 100.
one specific implementation process is as follows:
s1, putting the magnetic steel needle and a proper amount of annealed titanium alloy pipe into a polishing barrel simultaneously, wherein the polishing barrel is made of nonmetal materials such as PVC and the like, so that the steel needle and the pipe can be uniformly and randomly turned in the polishing barrel;
s2, adding a mixed solution of a polishing agent and water into a polishing barrel, wherein the amount of the added solution is preferably that the solution covers all the pipes to be polished;
and S3, setting the frequency, the rotating speed and the polishing time of the motor, starting the equipment, and driving the steel needle to rotate through electromagnetic force to realize the polishing of the inner surface and the outer surface of the pipe and the introduction of residual compressive stress.
In the embodiment, a magnetic polishing machine is used for polishing the titanium alloy pipe subjected to annealing treatment, a steel needle magnetic steel needle is driven to rotate through electromagnetic force, so that the magnetic steel needle generates high-speed flow and turnover, the inner surface and the outer surface of the pipe are polished through the striking and friction action on the surface of the titanium alloy pipe subjected to annealing treatment, residual compressive stress is synchronously introduced into the inner surface and the outer surface of the pipe, and the integral residual compressive stress of the titanium alloy pipe is improved, so that the fatigue resistance of the pipe is improved; meanwhile, the magnetic polishing machine is used for processing the pipe, and the requirement on the wall thickness of the pipe is low.
In a preferred embodiment, the titanium alloy pipe with the length less than 500mm is subjected to magnetic polishing treatment by adopting a rotary magnetic polishing process; and performing magnetic polishing treatment on the titanium alloy pipe with the length of more than 500mm by adopting a translation type magnetic polishing process.
According to the embodiment of the invention, the cold rolling and annealing process is combined for optimization and the magnetic polishing process is added, so that the surface quality and precision of the finished pipe can be effectively improved, and the residual compressive stress is introduced into the surface of the pipe, thereby improving the performances of corrosion resistance, fatigue resistance and the like of the pipe.
In addition, the magnetic polishing process can synchronously realize the regulation and control of the residual stress of the inner surface and the outer surface of the pipe, and the surface quality and the precision are higher.
And moreover, the newly added magnetic polishing process and equipment after cold rolling and annealing have simpler structures, are easy to implement, are suitable for large-scale industrial production, and have wide application prospects.
The above method will be described below with reference to specific examples:
example 1
The embodiment is a description of a rule of influence of cold rolling and annealing of a titanium alloy pipe on residual stress of the inner surface and the outer surface of the pipe based on numerical simulation and experiment, and the specific implementation process comprises the following steps:
based on ABAQUS finite element software, a numerical simulation model of the two-roller and three-roller cold-rolled titanium alloy pipe is established by combining actual rolling conditions and is used for simulation analysis of the cold-rolled residual stress of the titanium alloy pipe, and FIG. 2 shows the distribution characteristics of the circumferential residual stress of the inner surface and the outer surface of the titanium alloy pipe after the two-roller and three-roller cold rolling, the specification of an initial pipe blank is phi 25 multiplied by 5.5mm in the simulation process, the adopted Q value is 1.64, the deformation is 40 percent, in addition, in order to improve the calculation precision, the cold rolling process adopts display solution, and the unloading and springback process after the rolling adopts implicit solution;
as shown in fig. 2 and fig. 3, the results show that the internal and external residual stresses of the pipe after cold rolling are obviously unevenly distributed along the circumferential direction of the pipe, and in addition, the axial and circumferential residual stresses on the outer surface of the pipe are tensile stresses, and the axial and circumferential residual stresses on the inner surface of the pipe are compressive stresses;
taking the titanium alloy pipe subjected to the two-roller cold rolling as an object, setting the specification of an initial pipe blank to be phi 25 multiplied by 5.5mm, and establishing simulation models of different rolling schemes, wherein in order to accurately analyze the influence of a single process on the residual stress after rolling, the deformation amounts corresponding to different Q value models are kept consistent by 40%, and the Q values corresponding to different deformation amount models are kept consistent by 1.64; as shown in fig. 4 and 5, the results show that the residual stress of the inner and outer surfaces of the pipe tends to increase and decrease with the increase of the Q value, and when the deformation amount is increased, the axial residual tensile stress of the outer surface gradually decreases and the residual compressive stress of the inner surface gradually increases.
From the above results, it can be seen that although the change of the rolling process has almost no influence on the states of residual tensile stress on the outer surface and residual compressive stress on the inner surface, when the Q value is greater than 2 and the deformation is controlled between 45% and 60% in the cold rolling process, the residual stress on the inner and outer surfaces of the pipe is in a relatively proper range.
Performing cold rolling experiment and simulation analysis on a titanium alloy pipe with the specification of phi 20 multiplied by 1.5mm of a finished pipe, wherein the Q value is 2.01 and the deformation is about 50 percent in the experiment process, and performing vacuum stress relief annealing on the pipe after the rolling is finished, wherein the stress relief annealing temperature is 520 ℃.
Table 1 shows the simulation and test results of the residual stress on the inner and outer surfaces of the titanium alloy tube after cold rolling and annealing, wherein the residual stress on the outer surface of the tube is measured by using X-ray diffraction of a homotilt method, the residual stress on the inner surface of the tube is measured by using X-ray diffraction of a side tilt method, and the test results show that the actual cold-rolled tube also shows that the outer surface of the tube is in a residual tensile stress state and the inner surface of the tube is in a residual compressive stress state. The residual stress of the pipe can be effectively weakened after stress relief annealing, but the tensile and compression distribution states of the residual stress on the inner surface and the outer surface of the pipe cannot be changed. The above results also indicate that the cold rolling and annealing process can be optimized to improve the residual stress of the inner and outer surfaces of the titanium alloy tube, but the distribution state of the titanium alloy tube is not changed, and in order to improve the fatigue service performance of the tube, a subsequent treatment process is necessary to be added so as to introduce residual compressive stress on the surface of the tube.
TABLE 1 simulation and test results of residual stress on inner and outer surfaces of titanium alloy tubes after cold rolling and annealing
Example 2
In this embodiment, the test comparison of the influence of different surface treatment processes on the distribution state and size of the residual stress on the inner and outer surfaces of the titanium alloy shows that the specification of the finished product object is phi 12 × 0.9mm, and the specific implementation process includes the following steps:
the method is characterized in that a two-roller cold rolling mill is adopted for carrying out a rolling experiment, the cold rolling process adopts a Q value of 2.54 and a deformation of 53 percent, the rolled pipe is subjected to vacuum stress relief annealing at a temperature of 520 ℃, 1 sample with the length of 300mm is cut from the annealed pipe and is subjected to magnetic polishing treatment, wherein the magnetic polishing treatment process specifically comprises the following steps:
a rotary magnetic polishing process is adopted, a magnetic steel needle and a proper amount of pipes are simultaneously thrown into a polishing barrel, the polishing barrel is made of PVC nonmetal materials, the steel needle and the pipes can be uniformly and randomly turned in the polishing barrel, the steel needle for polishing is a cylindrical 304 stainless steel needle, the diameter of the steel needle is 0.5mm, and the length of the steel needle is 5 mm. Adding a mixed solution of a polishing agent and water into a polishing barrel, wherein the ratio of the polishing agent to the water is selected from 2: 100, the amount of solution added covered all the tubes to be polished. Setting the frequency, the rotating speed and the polishing time of the motor, and starting the equipment, wherein the rotating speed of the motor is controlled at 2800 revolutions, and the polishing time is 15 min.
Table 2 shows the results of the residual stress test on the inner and outer surfaces of the titanium alloy tube after magnetic polishing, wherein the Q value is 2.54 and the deformation is 53%, the residual stress on the outer surface of the titanium alloy tube is measured by the homodip method X-ray diffraction, the residual stress on the inner surface of the titanium alloy tube is measured by the side-tilt method X-ray diffraction, and the test results show that the magnetic polishing process can introduce large residual compressive stress on the outer surface of the titanium alloy tube in both the axial direction and the circumferential direction.
TABLE 2 test results of residual stress of inner and outer surfaces of titanium alloy pipe after magnetic polishing
Fig. 6 is an SEM image of the outer wall of the titanium alloy tube after magnetic polishing, and the result shows that the outer surface of the titanium alloy tube after magnetic polishing is relatively smooth, and the method provided by the present invention can be found by combining the above results, such that the residual stress of the inner surface and the outer surface of the tube can be controlled in a relatively large range, and the surface quality and the precision are relatively high.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for regulating and controlling residual stress on the inner surface and the outer surface of a titanium alloy pipe is characterized by comprising the following steps:
processing the titanium alloy pipe according to optimized cold rolling process parameters in a cold rolling process to obtain a cold-rolled titanium alloy pipe;
processing the titanium alloy pipe subjected to cold rolling according to the optimized annealing treatment parameters in a vacuum annealing treatment process to obtain the titanium alloy pipe subjected to annealing treatment;
and carrying out magnetic polishing treatment on the annealed titanium alloy pipe to realize synchronous regulation and control of the residual stress of the inner surface and the outer surface of the titanium alloy pipe.
2. The method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe according to claim 1, wherein the titanium alloy pipe is processed according to optimized cold rolling process parameters in a cold rolling process to obtain the cold-rolled titanium alloy pipe, and the method comprises the following steps:
and (4) processing the titanium alloy pipe according to the optimized Q value and deformation in the cold rolling process to obtain the cold-rolled titanium alloy pipe.
3. The method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe material according to claim 2, wherein the Q value is greater than 2, and the deformation amount is 45-60%.
4. The method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe according to claim 1, wherein the titanium alloy pipe subjected to the cold rolling treatment is treated according to the optimized annealing treatment parameters in a vacuum annealing treatment process to obtain the titanium alloy pipe subjected to the annealing treatment, and the method comprises the following steps:
and (3) carrying out treatment on the titanium alloy pipe after the cold rolling in a vacuum annealing treatment process according to the stress relief annealing temperature of 450-550 ℃, and keeping the temperature for 2h to obtain the titanium alloy pipe after the annealing treatment.
5. The method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe according to claim 1, wherein the magnetic polishing treatment is performed on the titanium alloy pipe after the annealing treatment, and comprises the following steps:
and placing the titanium alloy pipe subjected to annealing treatment into a magnetic polishing machine for magnetic polishing treatment.
6. The method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe according to claim 5, wherein the titanium alloy pipe after the annealing treatment is placed into a magnetic polishing machine for magnetic polishing treatment, and the method comprises the following steps:
placing the magnetic steel needle and the annealed titanium alloy pipe into a polishing barrel of the magnetic polishing machine;
and adding a mixed solution of a polishing agent and water into the polishing barrel, and polishing the titanium alloy pipe in the polishing barrel.
7. The method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe according to claim 5, wherein the diameter range of the magnetic steel needle is 0.15-1 mm, and the length of the steel needle is 3-5 mm.
8. The method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe according to claim 5, wherein the rotating speed of a motor of the magnetic polishing machine is set to be more than 2500 revolutions, and the polishing time is set to be 12-15 min.
9. The method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe material according to claim 5, wherein the ratio of the polishing agent to the water is 2: 100.
10. the method for regulating and controlling the residual stress on the inner surface and the outer surface of the titanium alloy pipe according to claim 1, wherein the magnetic polishing treatment is performed on the titanium alloy pipe after the annealing treatment, and comprises the following steps:
performing magnetic polishing treatment on the titanium alloy pipe with the length less than 500mm by adopting a rotary magnetic polishing process;
and performing magnetic polishing treatment on the titanium alloy pipe with the length of more than 500mm by adopting a translation type magnetic polishing process.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117102273A (en) * | 2023-10-24 | 2023-11-24 | 成都先进金属材料产业技术研究院股份有限公司 | Titanium alloy seamless pipe and method for improving rotation bending fatigue performance thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141566A (en) * | 1990-05-31 | 1992-08-25 | Sumitomo Metal Industries, Ltd. | Process for manufacturing corrosion-resistant seamless titanium alloy tubes and pipes |
| CN106133160A (en) * | 2014-04-10 | 2016-11-16 | 新日铁住金株式会社 | The intensity in length of tube direction, the alpha and beta type titan alloy welded pipe of excellent rigidity and its manufacture method |
| CN110158005A (en) * | 2019-07-01 | 2019-08-23 | 西北工业大学 | A kind of cold rolling high-strength titanium alloy pipes texture controlling method |
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2021
- 2021-09-27 CN CN202111135547.9A patent/CN113957367B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141566A (en) * | 1990-05-31 | 1992-08-25 | Sumitomo Metal Industries, Ltd. | Process for manufacturing corrosion-resistant seamless titanium alloy tubes and pipes |
| CN106133160A (en) * | 2014-04-10 | 2016-11-16 | 新日铁住金株式会社 | The intensity in length of tube direction, the alpha and beta type titan alloy welded pipe of excellent rigidity and its manufacture method |
| CN110158005A (en) * | 2019-07-01 | 2019-08-23 | 西北工业大学 | A kind of cold rolling high-strength titanium alloy pipes texture controlling method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117102273A (en) * | 2023-10-24 | 2023-11-24 | 成都先进金属材料产业技术研究院股份有限公司 | Titanium alloy seamless pipe and method for improving rotation bending fatigue performance thereof |
| CN117102273B (en) * | 2023-10-24 | 2024-02-02 | 成都先进金属材料产业技术研究院股份有限公司 | Titanium alloy seamless pipe and method for improving rotation bending fatigue performance thereof |
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