Method, device and equipment for determining texture strength of titanium alloy pipe

Abstract

The application provides a method, device and equipment for determining the texture strength of a titanium alloy pipe, wherein the method comprises: obtaining the initial radial texture strength of the titanium alloy pipe during rolling and rolling forming parameters; determining the quantitative relationship between the post-rolling radial texture strength and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture strength and the rolling forming parameters; and determining the target texture strength of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture strength and the shrinkage strain ratio. The scheme can improve the post-rolling radial texture strength and the shrinkage strain ratio of the titanium alloy pipe, thereby further improving the forming performance of the titanium alloy pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal material processing, in particular to a method, device and equipment for determining texture strength of titanium alloy pipe. BACKGROUND

[0002] Titanium alloy pipe is widely used in aircraft and engine hydraulic and starting core pipeline systems, plays a key role in fluid power transmission, and withstands harsh service environments such as high pressure and vibration. It is a key basic material urgently needed for the development of high-end equipment in the field of aerospace. The solution to the "leakage" bottleneck of current aerospace pipelines and the development of advanced aircraft and engine equipment have put forward higher requirements for high-strength titanium alloy pipes in terms of high pressure resistance, high reliability and long service life. Achieving high-performance precision forming of titanium alloy pipes is a key problem that needs to be solved to improve the performance and comprehensive indicators of advanced aircraft. Microstructure is an important factor affecting the anisotropic deformation behavior, mechanical properties, forming and service performance of titanium alloy pipes. Its difficulty in accurate prediction and control is a bottleneck problem that restricts the high-performance manufacturing of titanium alloy pipes.

[0003] Seamless titanium alloy pipes are usually made by periodic rolling process equipment. The complex thermal and mechanical loading path in the rolling process and the low symmetry characteristics of the close-packed hexagonal structure of titanium alloy make the rolled pipe show obvious microstructure distribution, resulting in significant anisotropy. The microstructure distribution characteristics and texture strength play a crucial role in the subsequent forming performance and service performance of the pipe. Studies have shown that the enhancement of radial texture strength is beneficial to improving the ability of the pipe to resist wall thickness reduction during deformation, thereby improving the mechanical properties and forming performance of the pipe. The current method for controlling the microstructure of titanium alloy pipe rolling mainly targets pipes with specific initial specifications and initial texture. The process involves a relatively wide range of deformation modes (relative wall reduction to relative diameter reduction ratio) or deformation degrees (deformation amount) based on experience. The interaction between the initial texture and the forming parameters is not considered, and the control mechanism is unclear. Meanwhile, the deformation distribution in the multi-pass rolling process is not considered in the process design, which seriously affects the high-performance precision forming of titanium alloy pipes. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a method, device and equipment for determining the texture strength of titanium alloy pipe, which can improve the radial texture strength and contraction strain ratio of titanium alloy pipe after rolling, thereby further improving the forming performance of titanium alloy pipe.

[0005] To solve the above technical problems, the technical solutions of the present application are as follows:

[0006] A method for determining the texture strength of titanium alloy pipe, the method comprising:

[0007] obtaining initial radial texture intensity of the titanium alloy pipe and rolling forming parameters in a rolling process of the titanium alloy pipe;

[0008] determining a quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters;

[0009] determining a target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio.

[0010] Optionally, the obtaining of the initial radial texture intensity of the titanium alloy pipe and the rolling forming parameters in the rolling process of the titanium alloy pipe comprises:

[0011] obtaining the initial radial texture intensity of the titanium alloy pipe, a ratio of the relative wall reduction amount to the relative diameter reduction amount, and a cross-sectional deformation amount of the pipe in the rolling process of the titanium alloy pipe.

[0012] Optionally, the determining of the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters comprises:

[0013] determining the post-rolling radial texture intensity of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters;

[0014] determining the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the post-rolling radial texture intensity.

[0015] Optionally, the determining of the post-rolling radial texture intensity of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters comprises:

[0016] determining the post-rolling radial texture intensity of the titanium alloy pipe according to f ND = a·(Q + b)d · (AR + c) e ·(f ND0 ) h

[0017] wherein f ND is the post-rolling radial texture intensity of the titanium alloy pipe, Q is the ratio of the relative wall reduction amount to the relative diameter reduction amount, AR is the cross-sectional deformation amount, f ND0 is the initial radial texture intensity of the titanium alloy pipe, and a, b, c, d, e, and h are constants.

[0018] Optionally, the determining of the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the post-rolling radial texture intensity comprises:

[0019] ​According to CSR=f ND / (k-f ND ), a quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe is determined;

[0020] Wherein, CSR is the shrinkage strain ratio of the titanium alloy pipe, f ND is the post-rolling radial texture intensity of the titanium alloy pipe, and k is a constant.

[0021] Optionally, according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio, the target texture intensity of the titanium alloy pipe is determined, comprising:

[0022] A threshold corresponding to the ratio of the relative wall reduction amount to the relative diameter reduction amount in the rolling process of the titanium alloy pipe with different initial radial texture intensities, and a threshold of the cross-section deformation amount are determined.

[0023] By setting the ratio of the relative wall reduction amount to the relative diameter reduction amount in the next rolling process, the ratio of the relative wall reduction amount to the relative diameter reduction amount is greater than the threshold corresponding to the ratio of the relative wall reduction amount to the relative diameter reduction amount; the cross-section deformation amount is greater than the threshold of the cross-section deformation amount; the activation degree of each surface of the titanium alloy pipe is controlled to determine the target texture intensity of the titanium alloy pipe.

[0024] Optionally, the method for determining the texture intensity of the titanium alloy pipe further comprises:

[0025] According to the target texture intensity, the titanium alloy pipe is rolled to obtain a rolled titanium alloy pipe.

[0026] The application also provides a device for determining the texture intensity of a titanium alloy pipe, comprising:

[0027] An acquisition module is configured to acquire the initial radial texture intensity of the titanium alloy pipe and rolling forming parameters in the rolling process of the titanium alloy pipe.

[0028] A processing module is configured to determine a quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters; and determine the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio.

[0029] The application also provides a computing device, comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions are executed by the processor to implement the steps of the method described above.

[0030] The application also provides a readable storage medium, wherein the readable storage medium stores a program or instructions, and the program or instructions are executed by a processor to implement the steps of the method described above.

[0031] The above scheme of the present application at least includes the following beneficial effects:

[0032] The above scheme of the present application, by acquiring the initial radial texture intensity of the titanium alloy pipe material in the rolling process of the titanium alloy pipe material and the rolling forming parameters; determining the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe material according to the initial radial texture intensity and the rolling forming parameters; determining the target texture intensity of the titanium alloy pipe material according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio. The radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe material after rolling are improved, and thus the forming performance of the titanium alloy pipe material is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a flowchart of the method for determining the texture intensity of the titanium alloy pipe material provided by the embodiment of the present application;

[0034] Figure 2 is a schematic diagram of the correlation between the post-rolling radial texture intensity and the shrinkage strain ratio of the high-strength TA8 titanium alloy pipe material of the embodiment of the present application;

[0035] Figure 3 is a schematic diagram of the interactive influence of the initial texture intensity, the ratio of the relative wall reduction amount and the relative diameter reduction amount, and the cross-sectional deformation amount on the shrinkage strain ratio of the high-strength TA18 titanium alloy pipe material of the embodiment of the present application;

[0036] Figure 4 is a schematic diagram of the threshold change of the ratio of the relative wall reduction amount and the relative diameter reduction amount and the cross-sectional deformation amount corresponding to the pipe material with the initial texture intensity of 0.30 of the embodiment of the present application;

[0037] Figure 5 is a schematic diagram of the threshold change of the ratio of the relative wall reduction amount and the relative diameter reduction amount and the cross-sectional deformation amount corresponding to the pipe material with the initial texture intensity of 0.40 of the embodiment of the present application;

[0038] Figure 6 is a schematic diagram of the threshold change of the ratio of the relative wall reduction amount and the relative diameter reduction amount and the cross-sectional deformation amount corresponding to the pipe material with the initial texture intensity of 0.50 of the embodiment of the present application;

[0039] Figure 7 is a schematic diagram of the threshold change of the ratio of the relative wall reduction amount and the relative diameter reduction amount and the cross-sectional deformation amount corresponding to the pipe material with the initial texture intensity of 0.55 of the embodiment of the present application;

[0040] Figure 8 is a schematic diagram of the threshold change of the ratio of the relative wall reduction amount and the relative diameter reduction amount and the cross-sectional deformation amount corresponding to the pipe material with the initial texture intensity of 0.60 of the embodiment of the present application;

[0041] Figure 9 is a schematic diagram of the threshold value change of the relative wall reduction amount and the relative diameter reduction amount ratio and the cross-sectional deformation amount of the titanium alloy pipe with an initial texture strength of 0.65 according to an embodiment of the present application;

[0042] Figure 10 is a schematic diagram of the evolution of the texture strength in three-pass rolling under a first-pass distribution scheme of the titanium alloy pipe with an initial texture strength of 0.307 according to an embodiment of the present application;

[0043] Figure 11 is a schematic diagram of the evolution of the texture strength in three-pass rolling under a second-pass distribution scheme of the titanium alloy pipe with an initial texture strength of 0.497 according to an embodiment of the present application;

[0044] Figure 12 is a schematic diagram of the evolution of the texture strength in three-pass rolling under a third-pass distribution scheme of the titanium alloy pipe with an initial texture strength of 0.606 according to an embodiment of the present application;

[0045] Figure 13 is a schematic diagram of the evolution of the texture strength in three-pass rolling under different initial textures and different pass distribution schemes according to an embodiment of the present application;

[0046] Figure 14 is a schematic diagram of the module block of the device for determining the texture strength of the titanium alloy pipe according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application can be more thoroughly understood, and the scope of the present application can be accurately conveyed to those skilled in the art.

[0048] As shown in Figure 1 , an embodiment of the present application provides a method for determining the texture strength of a titanium alloy pipe, the method comprising:

[0049] Step 11, obtaining an initial radial texture strength of the titanium alloy pipe in a rolling process of the titanium alloy pipe and rolling forming parameters;

[0050] Step 12, determining a quantitative relationship between a post-rolling radial texture strength and a shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture strength and the rolling forming parameters;

[0051] Step 13, determining a target texture strength of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture strength and the shrinkage strain ratio.

[0052] In this embodiment of the present application, the quantitative relationship between the post-rolling radial texture intensity of the titanium alloy pipe and the shrinkage strain ratio is determined according to the obtained initial radial texture intensity of the titanium alloy pipe in the rolling process of the titanium alloy pipe and the rolling forming parameters, and the target texture intensity of the titanium alloy pipe is determined according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio. In this way, the radial texture intensity of the titanium alloy pipe after rolling and the shrinkage strain ratio can be improved, and thus the forming performance of the titanium alloy pipe can be further improved, which can include mechanical properties and bending.

[0053] In this embodiment, the initial blank for rolling can be a hot extruded pipe blank, and the initial pipe blank should have a radial or bimodal texture distribution characteristic. The post-rolling texture intensity of the titanium alloy pipe can be greater than 0.5 N / m 2 (cow per square).

[0054] It should be noted that the rolling forming parameters can be obtained according to the actual requirements of the titanium alloy pipe demander.

[0055] It should be noted that in specific implementation, the rolling forming parameters corresponding to the radial texture intensity can also be determined reversely according to the shrinkage strain ratio determined by the titanium alloy pipe demander.

[0056] Specifically, the post-rolling radial texture intensity of the titanium alloy pipe required can be calculated by back calculation according to the shrinkage strain ratio determined by the titanium alloy pipe demander, and thus the rolling forming parameters corresponding to the radial texture intensity can be determined according to the post-rolling radial texture intensity, so as to roll the titanium alloy pipe with the target texture intensity.

[0057] In an optional embodiment of the present application, step 11 can include:

[0058] Step 111, obtaining the initial radial texture intensity of the titanium alloy pipe, the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the pipe cross-section deformation amount in the rolling process of the titanium alloy pipe.

[0059] In this embodiment, the rolling forming parameters can include the initial radial texture intensity of the titanium alloy pipe, the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the pipe cross-section deformation amount. In this way, the texture intensity and the shrinkage strain ratio of the titanium alloy pipe in the rolling process of the titanium alloy pipe can be accurately and quickly predicted through the quantitative relationship among the initial radial texture intensity of the titanium alloy pipe, the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the pipe cross-section deformation amount.

[0060] In another optional embodiment of the present application, step 12 can include:

[0061] Step 121: Determine the post-rolling radial texture strength of the titanium alloy tube based on the initial radial texture strength and the rolling forming parameters;

[0062] Step 122: Determine the quantitative relationship between the post-rolling radial texture strength and the shrinkage strain ratio of the titanium alloy tube based on the post-rolling radial texture strength.

[0063] In a specific implementation, step 121 may include:

[0064] Step 1211, according to f ND = a·(Q+b) d ·(AR+c) e ·(f ND0 ) h Determine the radial texture strength of titanium alloy tubing after rolling;

[0065] Among them, f ND Here, Q represents the radial texture strength of the titanium alloy tube after rolling, Q is the ratio of relative wall reduction to relative diameter reduction, AR is the cross-sectional deformation, and f is the radial texture strength of the titanium alloy tube after rolling. ND0 Let be the initial radial texture strength of the titanium alloy tube, where a, b, c, d, e, and h are all constants.

[0066] Specifically, step 122 may include:

[0067] Step 1221, according to CSR = f ND / (kf ND The quantitative relationship between the radial texture strength and shrinkage strain ratio of titanium alloy tubing after rolling was determined.

[0068] Where CSR is the shrinkage strain ratio of the titanium alloy tube, f ND Let be the radial texture strength of the titanium alloy tube after rolling, and k be a constant.

[0069] In this embodiment, by establishing a quantitative correlation between the initial radial texture strength, the post-rolling radial texture strength, and the shrinkage strain ratio (CSR) value, the rolling texture strength of titanium alloy tubes can be determined. The calculation is simple and easy to implement.

[0070] In another optional embodiment of the present invention, step 13 may include:

[0071] Step 131: Determine the threshold values ​​corresponding to the ratio of relative wall reduction to relative diameter reduction during the rolling process of titanium alloy tubes with different initial radial texture intensities, as well as the threshold value for cross-sectional deformation.

[0072] In step 132, the ratio of the relative wall reduction amount to the relative diameter reduction amount in the next pass is set to be greater than a threshold value corresponding to the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the cross-sectional deformation amount is greater than a threshold value of the cross-sectional deformation amount, and the activation degree of each surface of the titanium alloy pipe is controlled to determine the target texture strength of the titanium alloy pipe.

[0073] In the embodiment, the threshold value of the ratio of the relative wall reduction amount to the relative diameter reduction amount and the threshold value of the cross-sectional deformation amount of the titanium alloy pipe with different initial radial texture strengths in the rolling process can be determined according to CSR=f ND / (k-f ND ), by increasing the initial radial texture strength of the titanium alloy pipe, and increasing the ratio of the relative wall reduction amount to the relative diameter reduction amount and the cross-sectional deformation amount to exceed the corresponding threshold values, thereby reducing the activation degree of the cylindrical slip Pr{10-10}<11-20> in the rolling process, while increasing the activation degree of the conical slip Py<c+a>{10-11}<11-23> and the tensile twin Tt{10-12}<10-1-1>, thereby realizing the increase of the radial texture strength f ND and the contraction strain ratio CSR of the titanium alloy pipe after rolling.

[0074] In another optional embodiment of the present application, the method for determining the texture strength of the titanium alloy pipe can further include:

[0075] In step 14, the titanium alloy pipe is rolled according to the target texture strength to obtain a rolled titanium alloy pipe.

[0076] In the embodiment, the texture strength of the titanium alloy pipe can be controlled according to the target texture strength by combining the increase of the initial texture strength of the titanium alloy pipe and the optimization of the multi-pass rolling deformation distribution and annealing process. In this way, the radial texture strength and the contraction strain ratio of the titanium alloy pipe after rolling can be improved, thereby further improving the forming performance of the titanium alloy pipe, which can include mechanical properties and bending.

[0077] It should be noted that in the multi-pass rolling process, the pass deformation distribution scheme with increasing ratio of the relative wall reduction amount to the relative diameter reduction amount Q can be used, and the Q values of the initial pass and the final pass can be set to be in the range of Q>1 and Q>2.5, respectively.

[0078] Each pass in the multi-pass rolling process has the same cross-sectional deformation amount AR, which can be set to be between 50% and 60%.

[0079] Vacuum annealing can be used between each pass of rolling, and the annealing temperature can be set to be between 700℃ and 750℃, so that the titanium alloy pipe after annealing is in an initial fully recrystallized state.

[0080] In an optional embodiment of the present application, in the rolling process of high-strength TA18 titanium alloy pipe, based on experimental tests and simulation, the change of the texture intensity of the pipe in the rolling process under different initial texture pipes, different ratios of the relative wall reduction amount to the relative diameter reduction amount, and different cross-section deformation amounts is analyzed. The experimental tests can use EBSD (Electron Backscattered Diffraction) to characterize the texture distribution and texture intensity of the pipe before and after rolling. The simulation can use a numerical simulation platform coupling macroscopic finite elements and a self-consistent crystal plasticity model of microscopic viscous plasticity to calculate. Specifically, it can include:

[0081] Based on the micro-texture intensity data of the titanium alloy pipe obtained by the experimental tests and simulation under multiple groups of different conditions before and after rolling, the accuracy of the existing texture intensity prediction model and the prediction model established in the present application is compared by using multivariate nonlinear regression analysis. The results are shown in Table 1 below:

[0082]

[0083]

[0084] Table 1

[0085] In Table 1 above, prediction model 1 is a post-rolling texture intensity prediction model of the pipe considering only the influence of the ratio of the relative wall reduction amount to the relative diameter reduction amount, model 2 is a post-rolling texture intensity prediction model of the pipe introducing the influence of the cross-section deformation amount on the basis of the ratio of the relative wall reduction amount to the relative diameter reduction amount, and model 3 introduces the interaction of the initial texture intensity of the pipe, the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the cross-section deformation amount, and establishes a power exponential relationship between the post-rolling texture intensity of the pipe and the initial texture intensity of the pipe, the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the cross-section deformation amount.

[0086] From the results in Table 1 above, it can be seen that the multivariate nonlinear regression correlation coefficient of the post-rolling texture intensity prediction model of the pipe considering only the ratio of the relative wall reduction amount to the relative diameter reduction amount and considering the ratio of the relative wall reduction amount to the relative diameter reduction amount and the cross-section deformation amount at the same time is 0.594 and 0.751, respectively, and the fitting degree R between the predicted results and the actual data points is 0.594 and 0.751, respectively. The fitting degree R between the predicted results of prediction model 3 and the actual data points reaches 0.948. The residual sum of squares SSE is only 0.024, which is significantly lower than 0.143 and 0.101 of prediction model 1 and prediction model 2.

[0087] It can be seen that the prediction results of the post-rolling texture intensity of the pipe of prediction model 3 are closer to the actual data points, and prediction model 3 is more suitable for the prediction of the rolling texture intensity of the titanium alloy pipe.

[0088] The shrinkage strain ratio is an important index reflecting the anisotropy and mechanical properties of the pipe material, and the shrinkage strain ratio increases with the increase of the texture strength of the pipe material, in order to further reveal the quantitative relationship between the two, the rolling of high-strength TA18 titanium alloy pipe is taken as an example, a plurality of test data points of pipe material obtained under different cold rolling deformation conditions are selected as objects, the test points are fitted by a hyperbolic function, and the hyperbolic function relationship between the post-rolling texture strength of the pipe material and the shrinkage strain ratio is as follows:

[0089] CSR=f ND / (0.94-f ND )

[0090] The fitting results of the established relationship and the experimental test data are shown in Figure 2 As can be seen from the figure, the established model is in good agreement with the test data points, so that the established model can accurately describe the relationship between the shrinkage strain ratio and the post-rolling texture strength of the pipe material, and further provide guidance for the rolling texture strength and performance control of the titanium alloy pipe.

[0091] In another optional embodiment of the present application, the rolling process of high-strength TA18 titanium alloy pipe is taken as an object, the threshold values of the rolling process forming parameters corresponding to the relative wall reduction amount and the relative diameter reduction amount ratio Q and the cross-section deformation amount AR of the titanium alloy pipe with different initial textures are predicted and calculated based on the established titanium alloy pipe rolling, texture strength and shrinkage strain ratio CSR prediction model.

[0092] The quantitative correlation relationship between the cold rolling forming process, the radial texture strength and the anisotropy index shrinkage strain ratio CSR of high-strength TA18 titanium pipe can be further obtained by combining the above established forming process and pipe radial texture strength relationship and the relationship between the shrinkage strain ratio CSR and the post-rolling texture strength of the pipe, in order to more intuitively reflect the relationship between the forming process and the shrinkage strain ratio CSR value of the pipe, as shown in Figures 4 to 9 Six kinds of pipes with different initial texture strengths are selected as objects, wherein the pipes with initial texture strengths of 0.30 and 0.40 have strong circumferential texture, and the pipes with initial texture strengths of 0.50, 0.55, 0.60 and 0.65 have strong radial texture, and the interactive influence of the relative wall reduction amount and the relative diameter reduction amount ratio Q and the cross-section deformation amount AR and the initial texture strength on the pipe shrinkage strain ratio CSR is as shown in Figure 3As shown, when the initial texture strength remains constant, the shrinkage strain ratio (CSR) of the rolled tube increases with the increase of the ratio of relative wall reduction to relative diameter reduction (Q) and the cross-sectional deformation (AR). However, for tubes with high initial texture strength, i.e., radial texture, when the ratio of relative wall reduction to relative diameter reduction (Q) and the cross-sectional deformation (AR) are small, the shrinkage strain ratio (CSR) of the rolled tube tends to approach or is less than 1, indicating a significant decrease in the radial texture strength of the tube. As the initial rolled texture strength of the tube increases, the increase in the shrinkage strain ratio (CSR) of the rolled tube due to the increase of the ratio of relative wall reduction to relative diameter reduction (Q) and the cross-sectional deformation (AR) is also more significant. In addition, tubes with high initial rolled texture strength are more likely to obtain a higher shrinkage strain ratio (CSR) under the same forming process parameters.

[0093] against Figures 4 to 9 The six initial texture intensities shown are used to calculate the corresponding shrinkage strain ratio (CSR) using the established quantitative prediction model. Fixed planes are plotted in a three-dimensional coordinate system based on these CSRs, as shown in planes 41, 51, 61, 71, 81, and 91 in the figure. These planes intersect with the corresponding surfaces showing the CSR as a function of process parameters. The area above the planes represents the region where the CSR of the rolled pipe increases compared to the initial CSR, while the area below the planes represents the region where the CSR of the rolled pipe decreases compared to the initial CSR. Projections are made onto the aforementioned surfaces and corresponding planes, as shown below. Figures 4 to 9 As shown in the two-dimensional diagram, the intersection line between the two parts in the diagram represents the threshold values ​​corresponding to the ratio Q of relative wall reduction to relative diameter reduction and the cross-sectional deformation AR in the cold rolling forming process. Regions 52, 62, 72, 82, and 92 represent the regions where the shrinkage strain ratio CSR of the rolled tube decreases, while regions 42, 53, 63, 73, 83, and 93 represent the regions where the shrinkage strain ratio CSR increases. This is mainly because when the ratio Q of relative wall reduction to relative diameter reduction and the cross-sectional deformation AR are lower than the corresponding threshold values, some grains that were originally parallel to the c-axis and radial direction deflect circumferentially, leading to a decrease in the texture strength and a weakening of the radial texture strength after rolling. Conversely, when the ratio Q of relative wall reduction to relative diameter reduction and the cross-sectional deformation AR exceed the corresponding threshold values, some grains that were originally parallel to the c-axis and circumferential direction deflect radially, leading to an increase in the texture strength and an enhancement of the radial texture of the rolled tube. Furthermore, it can be observed that as the initial texture strength increases, the corresponding ratio Q of relative wall reduction to relative diameter reduction, which helps improve the shrinkage strain ratio CSR of the rolled tube, and the threshold of cross-sectional deformation AR also continuously increase.

[0094] In another optional embodiment of the present invention, the rolling of high-strength TA18 titanium alloy tubing is taken as the object, wherein the initial specifications... Finished product specification Based on the numerical simulation platform of coupled macroscopic finite element and mesoscopic self-consistent crystal plasticity model, the microstructure strength of pipe under different pass rolling specification design schemes was simulated and compared. The specific implementation process includes the following steps:

[0095] Two rolling schemes were designed as shown in Table 2:

[0096]

[0097] In the two rolling schemes, the deformation amount of each pass was the same and had a large cross-sectional deformation AR, and the cross-sectional deformation AR of each pass was about 55%; the difference was that for rolling scheme 1, the Q value of the three passes showed a gradually increasing trend, the Q value of the first pass was small, and the Q value of the final pass was large, and the ratio of the relative wall thickness reduction to the relative diameter reduction was 2.7; in rolling scheme 2, the three passes had a large and same ratio of the relative wall thickness reduction to the relative diameter reduction, and the value was 2.1.

[0098] The microstructure evolution of the rolling process under different initial textures and different pass specifications was simulated by the established numerical prediction platform. The initial texture strength of three different initial textures was 0.307, 0.497 and 0.606, the three-pass microstructure evolution pole figure results were as shown in Figures 10 to 12 , and the texture strength evolution in the three-pass rolling process was as shown in Figure 13 .

[0099] From the results in Figures 10 to 13 , for the pipe with circumferential texture and initial texture strength of 0.307, since the initial c-axis of the grain was almost oriented towards the circumferential direction of the pipe and the radial texture strength was very low, the texture strength of the pipe increased significantly in the first two passes of rolling under the two pass rolling schemes; in the third pass of rolling, the radial texture strength of the rolled pipe under rolling scheme 1 increased further, while the radial texture strength of the rolled pipe under rolling scheme 2 decreased slightly.

[0100] For the pipe with initial texture strength of 0.497, since the initial radial texture strength was also relatively weak, the texture strength of the pipe increased continuously after the first two passes of rolling under the two rolling schemes, but in the third pass of rolling, the radial texture of the pipe under rolling scheme 1 increased, while the radial texture of the pipe under rolling scheme 2 decreased slightly, which was mainly due to the fact that after the first two passes of rolling, the pipe already had a strong radial texture, and the radial texture strength of the pipe after the two passes of rolling under rolling scheme 2 was larger than that under rolling scheme 1, and the Q value of rolling scheme 2 was smaller than that of rolling scheme 1 in the third pass of rolling, which was not conducive to the enhancement of the radial texture strength of the pipe.

[0101] For the initial texture intensity of 0.606 pipe, because the initial pipe itself has a strong radial texture intensity, and the ratio Q of the relative wall reduction amount to the relative diameter reduction amount in the first pass of the rolling scheme 1 and the rolling scheme 2 is small, the radial texture intensity of the pipe after rolling decreases, and the radial texture of the pipe after the second pass of rolling under the two rolling schemes increases. In the third pass of rolling, because the ratio Q of the relative wall reduction amount to the relative diameter reduction amount in the scheme 1 is large, the radial texture of the pipe is further enhanced, and because the ratio Q of the relative wall reduction amount to the relative diameter reduction amount in the rolling scheme 2 is small, the radial texture intensity of the pipe decreases obviously.

[0102] It can be found from the above results that, in the three-pass cold rolling, the rolling scheme corresponding to the gradually increasing ratio Q of the relative wall reduction amount to the relative diameter reduction amount and the large ratio Q of the relative wall reduction amount to the relative diameter reduction amount in the final pass is more beneficial to the improvement of the radial texture intensity of the pipe. In addition, under the same pass rolling scheme, the pipe with a larger initial texture intensity is more beneficial to the formation of a stronger radial texture after rolling.

[0103] In the above embodiments of the present application, by comprehensively considering the interaction among the initial texture intensity, the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the cross-section deformation amount, a quantitative relationship among the initial texture intensity of the titanium alloy pipe, the radial texture intensity, and the shrinkage strain ratio is established, the texture intensity and the performance of the titanium alloy pipe after rolling can be effectively predicted, the threshold value corresponding to the ratio of the relative wall reduction amount to the relative diameter reduction amount and the cross-section deformation amount for improving the texture intensity of the titanium alloy pipe after rolling is accurately obtained, and quantitative guidance for the rolling process optimization is provided.

[0104] The proposed method for adjusting the activation degree of slip and twinning deformation mechanism in the cold rolling process by combining the improvement of the initial pipe texture intensity and the multi-pass rolling deformation distribution and annealing process optimization can effectively improve the radial texture intensity and the shrinkage strain ratio of the finished titanium alloy pipe, and further improve the mechanical properties and bending forming properties of the titanium alloy pipe, without the need for additional processing procedures, and is easy to implement.

[0105] As shown in Figure 14 The embodiment of the present application further provides a determination device 140 for the texture intensity of a titanium alloy pipe, and the device 140 comprises:

[0106] An acquisition module 141 is configured to acquire the initial radial texture intensity of the titanium alloy pipe and rolling forming parameters in the rolling process of the titanium alloy pipe.

[0107] The processing module 142 is configured to determine a quantitative relationship between the post-rolling radial texture intensity and the contraction strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters; and determine the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the contraction strain ratio.

[0108] Optionally, the initial radial texture intensity and the rolling forming parameters of the titanium alloy pipe in the rolling process are obtained, and the method comprises the following steps.

[0109] The initial radial texture intensity, the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the cross-section deformation amount of the titanium alloy pipe in the rolling process are obtained.

[0110] Optionally, the quantitative relationship between the post-rolling radial texture intensity and the contraction strain ratio of the titanium alloy pipe is determined according to the initial radial texture intensity and the rolling forming parameters, and the method comprises the following steps.

[0111] The post-rolling radial texture intensity of the titanium alloy pipe is determined according to the initial radial texture intensity and the rolling forming parameters.

[0112] The quantitative relationship between the post-rolling radial texture intensity and the contraction strain ratio of the titanium alloy pipe is determined according to the post-rolling radial texture intensity.

[0113] Optionally, the post-rolling radial texture intensity of the titanium alloy pipe is determined according to the initial radial texture intensity and the rolling forming parameters, and the method comprises the following steps.

[0114] The post-rolling radial texture intensity of the titanium alloy pipe is determined according to f ND =a·(Q+b) d ·(AR+c) e ·(f ND0 ) h .

[0115] Wherein, f ND is the post-rolling radial texture intensity of the titanium alloy pipe, Q is the ratio of the relative wall reduction amount to the relative diameter reduction amount, AR is the cross-section deformation amount, f ND0 is the initial radial texture intensity of the titanium alloy pipe, and a, b, c, d, e, and h are all constants.

[0116] Optionally, the quantitative relationship between the post-rolling radial texture intensity and the contraction strain ratio of the titanium alloy pipe is determined according to the post-rolling radial texture intensity, and the method comprises the following steps.

[0117] The quantitative relationship between the post-rolling radial texture intensity and the contraction strain ratio of the titanium alloy pipe is determined according to CSR=f ND / (k-f ND ).

[0118] Wherein, CSR is the shrinkage strain ratio of the titanium alloy pipe, f ND is the radial texture intensity of the titanium alloy pipe after rolling, and k is a constant.

[0119] Optionally, according to the quantitative relationship between the radial texture intensity after rolling and the shrinkage strain ratio, the target texture intensity of the titanium alloy pipe is determined, comprising:

[0120] determining a threshold corresponding to a ratio of a relative wall reduction amount to a relative diameter reduction amount in a rolling process of the titanium alloy pipe with different initial radial texture intensities, and a threshold of a cross-section deformation amount;

[0121] by setting the ratio of the relative wall reduction amount to the relative diameter reduction amount in the next rolling process to be greater than the threshold corresponding to the ratio of the relative wall reduction amount to the relative diameter reduction amount, and the cross-section deformation amount to be greater than the threshold of the cross-section deformation amount, controlling the activation degree of each surface of the titanium alloy pipe, and determining the target texture intensity of the titanium alloy pipe.

[0122] Optionally, the processing module 142 can also be used for:

[0123] According to the target texture intensity, the titanium alloy pipe is rolled to obtain a titanium alloy pipe after rolling.

[0124] It should be noted that the device corresponds to the above method, and all implementation manners in the above method embodiments are applicable to the embodiments of the device and can achieve the same technical effects.

[0125] Embodiments of the present application also provide a computing device, comprising a processor and a memory storing a computer program, when the computer program is executed by the processor, the method described above is executed. All implementation manners in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0126] Embodiments of the present application also provide a computer readable storage medium, comprising instructions, when the instructions are executed on a computer, the computer executes the method described above. All implementation manners in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0127] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0128] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the system, device and unit described above can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0129] In the embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. There can be another division during actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0130] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e. can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0131] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0132] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for making a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes various media that can store program codes, such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc.

[0133] Moreover, it is pointed out that in the device and method of the present application, obviously, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application. Also, the steps of performing the above series of processes can naturally be executed in time sequence according to the order of description, but do not necessarily have to be executed in time sequence. Some steps can be executed in parallel or independently of each other. It can be understood by those skilled in the art that all or any steps or components of the method and device of the present application can be implemented in hardware, firmware, software, or a combination thereof, in any computing device (including a processor, a storage medium, etc.) or a network of computing devices, using the basic programming skills of those skilled in the art upon reading the description of the present application.

[0134] Therefore, the object of the present application can also be achieved by running a program or a set of programs on any computing device. The computing device can be a commonly known general-purpose device. Therefore, the object of the present application can also be achieved only by providing a program product containing program code for implementing the method or device. That is, such a program product also constitutes the present application, and a storage medium storing such a program product also constitutes the present application. Obviously, the storage medium can be any commonly known storage medium or any storage medium developed in the future. It is also pointed out that in the device and method of the present application, obviously, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present application. Also, the steps of performing the above series of processes can naturally be executed in time sequence according to the order of description, but do not necessarily have to be executed in time sequence. Some steps can be executed in parallel or independently of each other.

[0135] The above is the preferred embodiment of the present application. It should be pointed out that for those skilled in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method of determining the texture strength of a titanium alloy tube, characterized by, The method comprises: obtaining the initial radial texture intensity of the titanium alloy pipe during the rolling process of the titanium alloy pipe and rolling forming parameters; determining the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters; determining the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio. The method comprises: obtaining the initial radial texture intensity of the titanium alloy pipe during the rolling process of the titanium alloy pipe and rolling forming parameters; determining the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters; determining the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio. The method comprises: obtaining the initial radial texture intensity of the titanium alloy pipe during the rolling process of the titanium alloy pipe and rolling forming parameters; According to , the post-rolling radial texture intensity of the titanium alloy pipe is determined; wherein, is the post-rolling radial texture intensity of the titanium alloy pipe, Q is the ratio of the relative wall reduction amount to the relative diameter reduction amount, AR is the cross-sectional deformation amount, is the initial radial texture intensity of the titanium alloy pipe, a, b, c, d, e, h are all constants; determining the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters; According to , a quantitative relationship between the radial texture intensity after rolling and the shrinkage strain ratio of the titanium alloy pipe is determined; wherein, CSR is the shrinkage strain ratio of the titanium alloy pipe, is the radial texture intensity after rolling of the titanium alloy pipe, and k is a constant.

2. The method of claim 1, wherein, determining the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio. The method comprises: obtaining the initial radial texture intensity of the titanium alloy pipe during the rolling process of the titanium alloy pipe and rolling forming parameters; 3. The method for determining the texture strength of titanium alloy tubing according to claim 1, characterized in that, determining the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters; determining the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio.

4. An apparatus for determining the texture strength of a titanium alloy tube, comprising: The method comprises: determining the threshold value of the ratio of the relative wall thickness reduction and the relative diameter reduction corresponding to different initial radial texture intensities of the titanium alloy pipe in the rolling process, and the threshold value of the cross-section deformation amount; by setting the ratio of the relative wall thickness reduction and the relative diameter reduction in the next rolling process to be greater than the threshold value of the ratio of the relative wall thickness reduction and the relative diameter reduction, and the cross-section deformation amount to be greater than the threshold value of the cross-section deformation amount, controlling the activation degree of each surface of the titanium alloy pipe, and determining the target texture intensity of the titanium alloy pipe. The method further comprises: rolling the titanium alloy pipe according to the target texture intensity to obtain the titanium alloy pipe after rolling. The device comprises: an acquisition module configured to obtain the initial radial texture intensity of the titanium alloy pipe during the rolling process of the titanium alloy pipe and rolling forming parameters; a processing module configured to determine the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters, and determine the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio. The device comprises: an acquisition module configured to obtain the initial radial texture intensity of the titanium alloy pipe during the rolling process of the titanium alloy pipe and rolling forming parameters; a processing module configured to determine the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters, and determine the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio. The device comprises: an acquisition module configured to obtain the initial radial texture intensity of the titanium alloy pipe during the rolling process of the titanium alloy pipe and rolling forming parameters; a processing module configured to determine the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy pipe according to the initial radial texture intensity and the rolling forming parameters, and determine the target texture intensity of the titanium alloy pipe according to the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio. determine a post-rolling radial texture intensity of the titanium alloy tube according to the initial radial texture intensity and the rolling forming parameters; determine a quantitative relationship between the post-rolling radial texture intensity and a shrinkage strain ratio of the titanium alloy tube according to the post-rolling radial texture intensity; wherein the determining the post-rolling radial texture intensity of the titanium alloy tube according to the initial radial texture intensity and the rolling forming parameters comprises: According to , the post-rolling radial texture intensity of the titanium alloy pipe is determined; wherein, is the post-rolling radial texture intensity of the titanium alloy pipe, Q is the ratio of the relative wall reduction amount to the relative diameter reduction amount, AR is the cross-sectional deformation amount, is the initial radial texture intensity of the titanium alloy pipe, a, b, c, d, e, h are all constants; wherein the determining the quantitative relationship between the post-rolling radial texture intensity and the shrinkage strain ratio of the titanium alloy tube according to the post-rolling radial texture intensity comprises: According to , a quantitative relationship between the radial texture intensity after rolling and the shrinkage strain ratio of the titanium alloy pipe is determined; wherein, CSR is the shrinkage strain ratio of the titanium alloy pipe, is the radial texture intensity after rolling of the titanium alloy pipe, and k is a constant.

5. A computing device, comprising: comprising: a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions being executed by the processor to implement the steps of the method according to any one of claims 1 to 3.

6. A readable storage medium characterized by, the program or instructions stored on the readable storage medium, the program or instructions being executed by the processor to implement the steps of the method according to any one of claims 1 to 3.

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