Method and System for Evaluating Microstructure and Properties of Titanium Plate and Strip Based on Post-Weld Heat Treatment

Abstract

The present invention relates to the technical field of microscopic property evaluation of titanium plate strips, and a method and system for evaluating the microscopic structure properties of titanium plate strips based on post-weld heat treatment, including: extracting the temperature-property two-dimensional curve corresponding to the sampling distance in the three-dimensional performance curve graph of heat treatment, performing equidistant sampling once on the temperature-property two-dimensional curve to obtain the first equidistant sample point sequence, drawing the first absolute slope curve according to the first absolute slope sequence, performing equidistant sampling twice on the first absolute slope curve to obtain the second equidistant sample point sequence, identifying the second absolute slope sequence, making up the performance evaluation accuracy on the three-dimensional performance curve graph of heat treatment according to the second absolute slope sequence to obtain the target three-dimensional performance surface graph, and identifying the microscopic structure properties in the target three-dimensional performance surface graph according to the current weld distance and the current heat treatment temperature. The present invention can improve the evaluation accuracy and evaluation efficiency of the microscopic structure properties of titanium plate strips after post-weld heat treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of microscopic property evaluation of titanium plate strips, and particularly to a method and system for evaluating the microscopic structure properties of titanium plate strips based on post-weld heat treatment. Background Art

[0002] In the manufacturing and processing of titanium alloys, welding is a key technology that enables the firm connection of titanium alloy components. However, as an active metal, titanium alloys are prone to defects during the welding process, such as residual stress and distortion caused by uneven heat source loading, which can affect the structural stability, load-bearing capacity, and fatigue resistance of welded parts.

[0003] Post-weld heat treatment is an important process for improving the microscopic structure and properties of welded parts. By post-weld heat treatment, the microscopic structure of the titanium alloy welded joint can be adjusted, the grain size and morphology can be optimized, and the residual stress can be reduced, thereby improving the mechanical properties and corrosion resistance of the welded part. When currently identifying the microscopic structure properties of post-weld heat-treated titanium plate strips, it is mainly determined according to the change curve diagram of the microscopic structure properties with the distance from the weld center and the post-weld heat treatment temperature. However, since this change curve diagram is obtained by fitting the index properties at different post-weld heat treatment temperatures and distances from the weld center, the fitting accuracy cannot be adjusted according to the change trend of the change relationship diagram. Therefore, there are problems of poor evaluation accuracy and low evaluation efficiency in the current evaluation of the microscopic structure properties of post-weld heat-treated titanium plate strips. Summary of the Invention

[0004] The present invention provides a method and system for evaluating the microscopic structure properties of titanium plate strips based on post-weld heat treatment, and its main purpose is to improve the evaluation accuracy and evaluation efficiency of the microscopic structure properties of post-weld heat-treated titanium plate strips.

[0005] To achieve the above object, a method for evaluating the microstructure properties of titanium plate strips based on post-weld heat treatment provided by the present invention includes: performing heat treatment performance detection on a pre-constructed titanium plate strip according to a preset post-weld heat treatment temperature gradient and performance detection indexes to obtain a heat treatment three-dimensional performance curve graph, wherein the x-axis of the heat treatment three-dimensional performance curve graph represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; sequentially extracting sampling distances in a preset sampling distance sequence, and extracting the temperature-performance two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve graph, wherein the independent variable of the temperature-performance two-dimensional curve is the post-weld heat treatment temperature and the dependent variable is the index performance; performing first equal-distance sampling on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equal-distance sample point sequence; identifying the absolute value of the slope of each first equal-distance sample point in the first equal-distance sample point sequence to obtain a first absolute slope sequence; drawing a first absolute slope curve according to the first absolute slope sequence, wherein the independent variable of the first absolute slope curve is the post-weld heat treatment temperature and the dependent variable is the absolute value of the slope; performing second equal-distance sampling on the first absolute slope curve according to the temperature sampling gradient to obtain a second equal-distance sample point sequence; identifying the absolute value of the slope of each second equal-distance sample point in the second equal-distance sample point sequence to obtain a second absolute slope sequence; performing performance evaluation accuracy compensation on the heat treatment three-dimensional performance curve graph according to the second absolute slope sequence to obtain a target three-dimensional performance surface graph; receiving the current weld distance and the current heat treatment temperature, and identifying the microstructure performance in the target three-dimensional performance surface graph according to the current weld distance and the current heat treatment temperature.

[0006] Optionally, the performing heat treatment performance detection on a pre-constructed titanium plate strip according to a preset post-weld heat treatment temperature gradient and performance detection indexes to obtain a heat treatment three-dimensional performance curve graph includes: sequentially extracting the post-weld heat treatment temperature in the post-weld heat treatment temperature gradient, performing post-weld heat treatment on the titanium plate strip according to the post-weld heat treatment temperature to obtain a heat-treated titanium plate strip; selecting a performance detection site sequence on the heat-treated titanium plate strip according to the sampling distance sequence; performing heat treatment performance detection on each performance detection site in the performance detection site sequence according to the performance detection indexes to obtain a site performance sequence; performing point plotting and fitting in a pre-constructed distance-temperature-performance three-dimensional coordinate system according to the post-weld heat treatment temperature, the sampling distance sequence, and the site performance sequence to obtain a heat treatment three-dimensional performance curve, wherein the x-axis of the distance-temperature-performance three-dimensional coordinate system represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; collecting the heat treatment three-dimensional performance curves corresponding to each heat-treated titanium plate strip to obtain a heat treatment three-dimensional performance curve graph.

[0007] Optionally, extracting the temperature-performance two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve graph includes: identifying the weld distance coordinate corresponding to the sampling distance on the x-axis of the distance-temperature-performance three-dimensional coordinate system; making a vertical plane of the x-axis through the weld distance coordinate; extracting the intersection points of the vertical plane and each heat treatment three-dimensional performance curve in the heat treatment three-dimensional performance curve graph to obtain a temperature-performance scatter point set; and fitting the temperature-performance scatter point set to obtain a temperature-performance two-dimensional curve.

[0008] Optionally, performing equidistant sampling once on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equidistant sample point sequence includes: calculating a sampling temperature sequence according to the temperature sampling gradient by using the following formula:

[0009] , where represents the i-th sampling temperature in the sampling temperature sequence, represents the sampling temperature serial number, represents the temperature sampling gradient, represents the minimum post-weld heat treatment temperature in the post-weld heat treatment temperature gradient, represents the maximum post-weld heat treatment temperature in the post-weld heat treatment temperature gradient; identifying the coordinate points corresponding to each sampling temperature in the sampling temperature sequence on the temperature-performance two-dimensional curve to obtain a first equidistant sample point sequence.

[0010] Optionally, performing performance evaluation accuracy supplementation on the heat treatment three-dimensional performance curve graph according to the second absolute slope sequence to obtain a target three-dimensional performance surface graph includes: sequentially extracting the second absolute slope in the second absolute slope sequence and identifying the second equidistant sample points corresponding to the second absolute slope; determining an accuracy supplementation area according to the second equidistant sample points, and performing accuracy supplementation on the accuracy supplementation area according to the second absolute slope to obtain a target three-dimensional performance surface graph.

[0011] Optionally, determining the accuracy supplementation area according to the second equidistant sample points includes: identifying the sample point weld distance and the sample point heat treatment temperature of the second equidistant sample points, and identifying the distance sampling gradient of the sampling distance sequence, where the distance sampling gradient refers to the difference between two adjacent sampling distances in the sampling distance sequence;

[0012] Calculating a weld distance interval and a heat treatment temperature interval by using the following formula according to the sample point weld distance, the sample point heat treatment temperature, the distance sampling gradient, and the temperature sampling gradient:

[0013] , where represents the minimum value of the weld distance interval, represents the sample point weld distance, Indicates the distance sampling gradient, Indicates the maximum value of the weld distance interval, Indicates the minimum value of the heat treatment temperature interval, Indicates the maximum value of the heat treatment temperature interval, Indicates the heat treatment temperature of the sample point; the precision supplement area is determined according to the weld distance interval and the heat treatment temperature interval.

[0014] Optionally, the precision supplement of the precision supplement area according to the second absolute slope to obtain a target three-dimensional performance surface diagram includes: calculating a heat treatment temperature supplement gradient and a weld distance supplement gradient according to the second absolute slope by using a pre-constructed temperature supplement gradient formula and a distance supplement gradient formula; setting a heat treatment temperature supplement point sequence within the heat treatment temperature interval according to the heat treatment temperature supplement gradient, and setting a weld distance supplement point sequence within the weld distance interval according to the weld distance supplement gradient; combining and matching the heat treatment temperature supplement points and weld distance supplement points in the heat treatment temperature supplement point sequence and the weld distance supplement point sequence to obtain a temperature-distance combination set, where the number of temperature-distance combinations in the temperature-distance combination set is equal to the product of the number of heat treatment temperature supplement points in the heat treatment temperature supplement point sequence and the number of weld distance supplement points in the weld distance supplement point sequence; performing heat treatment performance detection on the titanium strip according to the temperature-distance combination set to obtain a supplemented index performance set; performing performance coordinate point supplementation in the heat treatment three-dimensional performance curve diagram according to the corresponding relationship between the temperature-distance combination in the temperature-distance combination set and the supplemented index performance in the supplemented index performance set to obtain a target three-dimensional performance scatter set; performing surface fitting on the target three-dimensional performance scatter set to obtain a target three-dimensional performance surface diagram.

[0015] Optionally, the temperature supplement gradient formula and the distance supplement gradient formula are as follows:

[0016] , where Indicates the heat treatment temperature supplement gradient, Indicates the dependent temperature adjustment coefficient, e represents the natural constant, Indicates the independent temperature adjustment coefficient, Indicates the second absolute slope, Indicates the weld distance supplement gradient, Indicates the dependent distance adjustment coefficient, Indicates the independent distance adjustment coefficient.

[0017] Optionally, the identifying the microstructure performance in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature includes: identifying the current weld distance coordinate and the current heat treatment temperature coordinate on the x-axis and the y-axis of the distance-temperature-performance three-dimensional coordinate system respectively according to the current weld distance and the current heat treatment temperature; identifying the corresponding target three-dimensional coordinate point on the target three-dimensional performance surface according to the current weld distance coordinate and the current heat treatment temperature coordinate; and identifying the index performance corresponding to the target three-dimensional coordinate point to complete the identification of the microstructure performance.

[0018] To achieve the above object, the present invention further provides a system for evaluating the microstructure performance of titanium plate strips based on post-weld heat treatment, including: a temperature-performance two-dimensional curve extraction module, configured to perform heat treatment performance detection on a pre-constructed titanium plate strip according to a preset post-weld heat treatment temperature gradient and a performance detection index, to obtain a heat treatment three-dimensional performance curve diagram, wherein the x-axis of the heat treatment three-dimensional performance curve diagram represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; sequentially extracting sampling distances in a preset sampling distance sequence, and extracting a temperature-performance two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve diagram, wherein the independent variable of the temperature-performance two-dimensional curve is the post-weld heat treatment temperature, and the dependent variable is the index performance; a second absolute slope sequence identification module, configured to perform equidistant sampling on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equidistant sample point sequence; identifying the absolute value of the slope of each first equidistant sample point in the first equidistant sample point sequence to obtain a first absolute slope sequence; drawing a first absolute slope curve according to the first absolute slope sequence, wherein the independent variable of the first absolute slope curve is the post-weld heat treatment temperature, and the dependent variable is the absolute value of the slope; performing secondary equidistant sampling on the first absolute slope curve according to the temperature sampling gradient to obtain a second equidistant sample point sequence; identifying the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence to obtain a second absolute slope sequence; a performance evaluation accuracy compensation module, configured to perform performance evaluation accuracy compensation on the heat treatment three-dimensional performance curve diagram according to the second absolute slope sequence to obtain a target three-dimensional performance surface diagram; and a microstructure performance identification module, configured to receive the current weld distance and the current heat treatment temperature, and identify the microstructure performance in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature.

[0019] To solve the above problems, the present invention further provides an electronic device, which includes: a memory storing at least one instruction; and a processor configured to execute the instruction stored in the memory to implement the above-mentioned method for evaluating the microstructure performance of titanium plate strips based on post-weld heat treatment.

[0020] To solve the above problems, the present invention also provides a computer-readable storage medium, in which at least one instruction is stored, and the at least one instruction is executed by a processor in an electronic device to implement the above-mentioned method for evaluating the microstructure performance of titanium plate strips based on post-weld heat treatment.

[0021] To solve the problems described in the background art, the present invention takes the way of compensating the performance evaluation accuracy of the heat treatment three-dimensional performance curve to improve the performance evaluation accuracy of the heat treatment three-dimensional performance curve. Therefore, first, it is necessary to perform heat treatment performance detection on the titanium plate strip according to the preset post-weld heat treatment temperature gradient and performance detection indexes to obtain the heat treatment three-dimensional performance curve. Then, the temperature-performance two-dimensional curve is extracted from the heat treatment three-dimensional performance curve by fixing the sampling distance. By sequentially extracting the sampling distances in the sampling distance sequence and then extracting the temperature-performance two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve, in order to achieve the adaptive performance evaluation accuracy compensation density at different positions of the heat treatment three-dimensional performance curve, first, an equidistant sampling is performed on the temperature-performance two-dimensional curve according to the temperature sampling gradient to obtain the first equidistant sample point sequence. Then, the absolute value of the slope of each first equidistant sample point in the first equidistant sample point sequence is identified to obtain the first absolute slope sequence. Finally, the first absolute slope curve is drawn according to the first absolute slope sequence. Since the first absolute slope curve can only reflect the change relationship of the index performance with the post-weld heat treatment temperature and cannot reflect the change relationship of the change rate of the index performance with the post-weld heat treatment temperature, it is necessary to perform a second equidistant sampling on the first absolute slope curve according to the temperature sampling gradient to obtain the second equidistant sample point sequence. Then, the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence is identified to obtain the second absolute slope sequence. At this time, the performance evaluation accuracy can be compensated on the heat treatment three-dimensional performance curve according to the second absolute slope sequence to obtain the target three-dimensional performance surface diagram. Finally, by receiving the current weld distance and the current heat treatment temperature, and then identifying the microstructure performance in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature. Therefore, the present invention can improve the evaluation accuracy and evaluation efficiency of the microstructure performance of titanium plate strips after post-weld heat treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic flowchart of a method for evaluating the microstructure performance of titanium plate strips based on post-weld heat treatment provided by an embodiment of the present invention;

[0023] Figure 2 It is a functional module diagram of a system for evaluating the microstructure performance of titanium plate strips based on post-weld heat treatment provided by an embodiment of the present invention;

[0024] Figure 3Schematic structural diagram of an electronic device for implementing the method for evaluating the microstructure properties of titanium plate strips based on post-weld heat treatment provided by an embodiment of the present invention.

[0025] The realization, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] An embodiment of the present application provides a method for evaluating the microstructure properties of titanium plate strips based on post-weld heat treatment. The execution subject of the method for evaluating the microstructure properties of titanium plate strips based on post-weld heat treatment includes, but is not limited to, at least one of electronic devices such as a server, a terminal, etc. that can be configured to execute the method provided by the embodiment of the present application. In other words, the method for evaluating the microstructure properties of titanium plate strips based on post-weld heat treatment can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes, but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc.

[0028] Refer to Figure 1 As shown, it is a flowchart of a method for evaluating the microstructure properties of titanium plate strips based on post-weld heat treatment provided by an embodiment of the present invention. In this embodiment, the method for evaluating the microstructure properties of titanium plate strips based on post-weld heat treatment includes:

[0029] S1. Perform heat treatment performance detection on a pre-constructed titanium plate strip according to a preset post-weld heat treatment temperature gradient and performance detection indexes to obtain a three-dimensional heat treatment performance curve graph.

[0030] It can be understood that the post-weld heat treatment temperature gradient refers to the temperature gradient for performing post-weld heat treatment on the titanium plate strip, for example: , , , , . The performance detection indexes refer to the indexes for performing heat treatment performance detection on the titanium plate strip, for example: grain size, Vickers hardness, resistivity, transverse residual stress, longitudinal residual stress, etc. The heat treatment performance detection refers to the detection of the index performance of the titanium plate strip after post-weld heat treatment. The three-dimensional heat treatment performance curve graph refers to a three-dimensional curve graph representing the change of the index performance at different distances from the weld center under the change of the post-weld heat treatment temperature gradient of the titanium plate strip.

[0031] Specifically, the x-axis of the three-dimensional heat treatment performance curve graph represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance.

[0032] In the embodiments of the present invention, the heat treatment performance of the pre-constructed titanium strip is detected according to the preset post-weld heat treatment temperature gradient and performance detection index to obtain a three-dimensional heat treatment performance curve graph, including: successively extracting the post-weld heat treatment temperature in the post-weld heat treatment temperature gradient, performing post-weld heat treatment on the titanium strip according to the post-weld heat treatment temperature to obtain a heat-treated titanium strip; selecting a performance detection site sequence on the heat-treated titanium strip according to the sampling distance sequence; performing heat treatment performance detection on each performance detection site in the performance detection site sequence according to the performance detection index to obtain a site performance sequence; plotting and fitting points in a pre-constructed three-dimensional distance-temperature-performance coordinate system according to the post-weld heat treatment temperature, sampling distance sequence, and site performance sequence to obtain a three-dimensional heat treatment performance curve, where the x-axis of the three-dimensional distance-temperature-performance coordinate system represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; collecting the three-dimensional heat treatment performance curves corresponding to each heat-treated titanium strip to obtain a three-dimensional heat treatment performance curve graph.

[0033] Further, the sampling distance sequence refers to a sequence composed of the distances from the weld center determined by the distance sampling gradient, and the distance sampling gradient refers to the change gradient of the sampling distances in the sampling distance sequence. For example, when the distance sampling gradient is 1 mm, the sampling distance sequence can be 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, etc. The performance detection site sequence refers to a sequence of sites for detecting the index performance determined according to the sampling distance sequence. The site performance sequence refers to a sequence composed of the index performances of each performance detection site. The three-dimensional heat treatment performance curve refers to a curve showing the change relationship between the sampling distance sequence and the site performance sequence at the same post-weld heat treatment temperature.

[0034] S2. Successively extract the sampling distances in the preset sampling distance sequence, and extract the temperature-performance two-dimensional curve corresponding to the sampling distance in the three-dimensional heat treatment performance curve graph.

[0035] It should be understood that the temperature-performance two-dimensional curve refers to a curve fitted from the points in the three-dimensional heat treatment performance curve graph where the distance from the weld center is the sampling interval.

[0036] Specifically, the independent variable of the temperature-performance two-dimensional curve is the post-weld heat treatment temperature, and the dependent variable is the index performance.

[0037] In an embodiment of the present invention, extracting the temperature-performance two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve diagram includes: identifying the weld distance coordinate corresponding to the sampling distance on the x-axis of the distance-temperature-performance three-dimensional coordinate system; making a vertical plane of the x-axis passing through the weld distance coordinate; extracting the intersection points of the vertical plane and each heat treatment three-dimensional performance curve in the heat treatment three-dimensional performance curve diagram to obtain a temperature-performance scatter point set; and fitting the temperature-performance scatter point set to obtain a temperature-performance two-dimensional curve.

[0038] Further, the weld distance coordinate refers to the coordinate on the x-axis with a distance of the sampling distance from the weld center. The vertical plane refers to a plane perpendicular to the x-axis. For example, when the weld distance coordinate is 6 mm, the vertical plane is a plane passing through the coordinate (6 mm, 0, 0) and parallel to the y-axis and z-axis of the heat treatment three-dimensional performance curve diagram. The temperature-performance scatter point set refers to the set of coordinate points in the heat treatment three-dimensional performance curve diagram with a distance of the sampling distance from the weld center. The temperature-performance two-dimensional curve refers to the curve of the target performance changing with the post-weld heat treatment temperature.

[0039] S3. Perform equidistant sampling at one time on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equidistant sample point sequence.

[0040] It can be understood that the temperature sampling gradient refers to the temperature change gradient during the process of equidistant sampling at one time and equidistant sampling at a second time. The equidistant sampling at one time refers to the first time of collecting coordinate points on the temperature-performance two-dimensional curve. The first equidistant sample point sequence refers to the sequence of coordinate points obtained after the first equidistant sampling. For example, when the performance detection index is the grain size, the first equidistant sample point sequence can be (6 mm, 600 , 120 ), (6 mm, 610 , 123 ), (6 mm, 620 , 125 ), etc. At this time, the temperature sampling gradient is 10 .

[0041] In an embodiment of the present invention, performing equidistant sampling at one time on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equidistant sample point sequence includes: calculating a sampling temperature sequence according to the temperature sampling gradient by using the following formula:

[0042] , where represents the i-th sampling temperature in the sampling temperature sequence, represents the sampling temperature serial number, represents the temperature sampling gradient, represents the minimum post-weld heat treatment temperature in the post-weld heat treatment temperature gradient, represents the maximum post-weld heat treatment temperature in the post-weld heat treatment temperature gradient;

[0043] Identify the coordinate points corresponding to each sampling temperature in the sampling temperature sequence on the temperature-property two-dimensional curve to obtain the first equidistant sample point sequence.

[0044] It can be understood that the sampling temperature sequence refers to a sequence composed of sampling temperatures with a temperature sampling gradient as the difference between adjacent sampling temperatures.

[0045] S4. Identify the absolute value of the slope of each first equidistant sample point in the first equidistant sample point sequence to obtain the first absolute slope sequence.

[0046] Furthermore, the absolute value of the slope refers to the absolute value of the slope. The first absolute slope sequence refers to a sequence composed of the absolute values of the slopes of the first equidistant sample points. For example: when the first equidistant sample point sequence is (6mm, 600 , 120 ), (6mm, 610 , 123 ), (6mm, 620 , 125 ), the first absolute slope sequence is composed of the slopes corresponding to (6mm, 600 , 120 ), (6mm, 610 , 123 ), (6mm, 620 , 125 on the temperature-property two-dimensional curve.

[0047] It can be understood that since the magnitude of the absolute value of the slope represents the rate of change of the index performance on the temperature-property two-dimensional curve at the first equidistant sample point with respect to the post-weld heat treatment temperature, and the positive or negative sign of the slope only represents the direction of change of the index performance on the temperature-property two-dimensional curve at the first equidistant sample point with respect to the post-weld heat treatment temperature, while the embodiments of the present invention only need to calculate the rate of change of the index performance with respect to the post-weld heat treatment temperature, therefore, it is necessary to take the absolute value of the slope of the first equidistant sample point.

[0048] S5. Draw a first absolute slope curve according to the first absolute slope sequence.

[0049] Specifically, the first absolute slope curve refers to a curve representing the change of the first absolute slope sequence with respect to the post-weld heat treatment temperature. The independent variable of the first absolute slope curve is the post-weld heat treatment temperature, and the dependent variable is the absolute value of the slope.

[0050] S6. Perform secondary equidistant sampling on the first absolute slope curve according to the temperature sampling gradient to obtain a second equidistant sample point sequence.

[0051] Further, the secondary equidistant sampling refers to performing equidistant sampling on the first absolute slope curve for the second time. The second equidistant sample point sequence refers to the sequence of coordinate points obtained after the secondary equidistant sampling. For example: when the sampling temperature sequence corresponding to the first equidistant sample point sequence is 、 、 、 、 , the temperature sampling gradient is , and the sampling temperature sequence corresponding to the second equidistant sample point sequence is also 、 、 、 、 . When the sampling temperature sequence corresponding to the second equidistant sample point sequence is 、 、 、 、 , the second equidistant sample point sequence can be (6mm, 600 , ), (6mm, 610 , ), (6mm, 620 , ), etc. Among them, 、 、 represent the slopes of each second equidistant sample point in the second equidistant sample point sequence on the first absolute slope curve.

[0052] S7. Identify the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence to obtain a second absolute slope sequence.

[0053] It should be understood that the second absolute slope sequence refers to the sequence composed of the absolute values of the slopes of the second equidistant sample points, and the second absolute slope sequence is composed of the slopes of each second equidistant sample point on the first absolute slope curve.

[0054] S8. Perform performance evaluation accuracy supplementation on the heat treatment three-dimensional performance curve graph according to the second absolute slope sequence to obtain a target three-dimensional performance surface graph.

[0055] It should be understood that the performance evaluation accuracy supplementation refers to supplementing the index performance evaluation accuracy of the heat treatment three-dimensional performance curve graph. The target three-dimensional performance surface graph refers to the heat treatment three-dimensional performance curve graph after completing the supplementation of performance coordinate points.

[0056] In an embodiment of the present invention, the accuracy compensation of the performance evaluation on the heat treatment three-dimensional performance curve graph is performed according to the second absolute slope sequence to obtain a target three-dimensional performance surface graph, including: sequentially extracting the second absolute slope in the second absolute slope sequence, and identifying the second equally spaced sample points corresponding to the second absolute slope; determining an accuracy compensation region according to the second equally spaced sample points, and performing accuracy compensation on the accuracy compensation region according to the second absolute slope to obtain a target three-dimensional performance surface graph.

[0057] Further, the accuracy compensation region refers to the region for performing accuracy compensation of the performance evaluation determined according to the second equally spaced sample points.

[0058] In an embodiment of the present invention, the determining the accuracy compensation region according to the second equally spaced sample points includes: identifying the sample point weld distance and the sample point heat treatment temperature of the second equally spaced sample points, and identifying the distance sampling gradient of the sampling distance sequence, where the distance sampling gradient refers to the difference between two adjacent sampling distances in the sampling distance sequence; calculating the weld distance interval and the heat treatment temperature interval by using the following formula according to the sample point weld distance, the sample point heat treatment temperature, the distance sampling gradient, and the temperature sampling gradient:

[0059] , where represents the minimum value of the weld distance interval, represents the sample point weld distance, represents the distance sampling gradient, represents the maximum value of the weld distance interval, represents the minimum value of the heat treatment temperature interval, represents the maximum value of the heat treatment temperature interval, represents the sample point heat treatment temperature; determining the accuracy compensation region according to the weld distance interval and the heat treatment temperature interval.

[0060] It can be understood that the sample point weld distance refers to the distance from the sample point corresponding to the second equally spaced sample points to the weld center, the sample point heat treatment temperature refers to the post-weld heat treatment temperature corresponding to the second equally spaced sample points, the weld distance interval refers to the interval of the distance from the weld center corresponding to the accuracy compensation region, and the heat treatment temperature interval refers to the interval of the post-weld heat treatment temperature corresponding to the accuracy compensation region.

[0061] In an embodiment of the present invention, the step of performing accuracy compensation on the accuracy compensation region according to the second absolute slope to obtain a target three-dimensional performance surface diagram includes: calculating a heat treatment temperature compensation gradient and a weld distance compensation gradient according to the second absolute slope by using a pre-constructed temperature compensation gradient formula and a distance compensation gradient formula; setting a heat treatment temperature compensation point sequence within the heat treatment temperature range according to the heat treatment temperature compensation gradient, and setting a weld distance compensation point sequence within the weld distance range according to the weld distance compensation gradient; combining and matching the heat treatment temperature compensation points and the weld distance compensation points in the heat treatment temperature compensation point sequence and the weld distance compensation point sequence to obtain a temperature-distance combination set, where the number of temperature-distance combinations in the temperature-distance combination set is equal to the product of the number of heat treatment temperature compensation points in the heat treatment temperature compensation point sequence and the number of weld distance compensation points in the weld distance compensation point sequence; performing heat treatment performance detection on the titanium strip according to the temperature-distance combination set to obtain a compensated index performance set; performing performance coordinate point compensation in the heat treatment three-dimensional performance curve diagram according to the correspondence between the temperature-distance combinations in the temperature-distance combination set and the compensated index performances in the compensated index performance set to obtain a target three-dimensional performance scatter set; and performing surface fitting on the target three-dimensional performance scatter set to obtain a target three-dimensional performance surface diagram.

[0062] It should be understood that the heat treatment temperature compensation gradient refers to the temperature gradient for determining the heat treatment temperature compensation point sequence in the heat treatment temperature range, and the weld distance compensation gradient refers to the distance gradient for determining the weld distance compensation point sequence in the weld distance range. The heat treatment temperature compensation point sequence refers to the coordinate point sequence corresponding to the y-axis in the distance-temperature-performance three-dimensional coordinate system during accuracy compensation. The weld distance compensation point sequence refers to the coordinate point sequence corresponding to the x-axis in the distance-temperature-performance three-dimensional coordinate system during accuracy compensation. For example: when the post-weld heat treatment temperature gradient is , , , , , the heat treatment temperature compensation gradient can be 10 . When the distance sampling gradient is 1 mm and the sampling distance sequence is 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, the weld distance compensation gradient can be 0.2 mm.

[0063] In an embodiment of the present invention, the temperature compensation gradient formula and the distance compensation gradient formula are as follows:

[0064] , where represents the heat treatment temperature compensation gradient, represents the variable temperature adjustment coefficient, e represents the natural constant, Represents the self-variable temperature adjustment coefficient, Represents the second absolute slope, Represents the weld distance compensation gradient, Represents the dependent distance adjustment coefficient, Represents the self-variable distance adjustment coefficient.

[0065] It can be understood that the dependent temperature adjustment coefficient refers to the coefficient for adjusting the magnitude of the dependent variable of the e-exponential temperature function (i.e., ), the self-variable temperature adjustment coefficient refers to the coefficient for adjusting the magnitude of the independent variable of the e-exponential temperature function, the dependent distance adjustment coefficient refers to the coefficient for adjusting the magnitude of the dependent variable of the e-exponential distance function (i.e., ), and the self-variable distance adjustment coefficient refers to the coefficient for adjusting the magnitude of the independent variable of the e-exponential distance function. Since the larger the second absolute slope, the greater the slope change rate of the corresponding second equidistant sample point, a smaller heat treatment temperature compensation gradient and weld distance compensation gradient are required to improve the fitting accuracy of the precision compensation area of the second equidistant sample point with rapid slope change.

[0066] S9. Receive the current weld distance and the current heat treatment temperature, and identify the microstructure performance in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature.

[0067] It can be understood that the current weld distance refers to the distance from the site where the microstructure performance of the titanium strip is currently identified to the weld center, and the current heat treatment temperature refers to the temperature of the post-weld heat treatment of the titanium strip currently. The microstructure performance refers to the index performance of the titanium strip at the current weld distance position after being treated at the current heat treatment temperature, such as: grain size, Vickers hardness, resistivity, transverse residual stress, and longitudinal residual stress, etc.

[0068] In the embodiment of the present invention, the identifying the microstructure performance in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature includes: identifying the current weld distance coordinate and the current heat treatment temperature coordinate on the x-axis and y-axis of the distance-temperature-performance three-dimensional coordinate system respectively according to the current weld distance and the current heat treatment temperature; identifying the corresponding target three-dimensional coordinate point on the target three-dimensional performance surface according to the current weld distance coordinate and the current heat treatment temperature coordinate; and identifying the index performance corresponding to the target three-dimensional coordinate point to complete the identification of the microstructure performance.

[0069] Further, the current weld distance coordinate refers to the coordinate corresponding to the current weld distance on the x-axis of the distance-temperature-property three-dimensional coordinate system, and the current heat treatment temperature coordinate refers to the coordinate corresponding to the current heat treatment temperature on the y-axis of the distance-temperature-property three-dimensional coordinate system. The target three-dimensional coordinate point refers to the coordinate point determined by the current weld distance coordinate and the current heat treatment temperature coordinate on the target three-dimensional property surface.

[0070] To solve the problems described in the background art, the present invention adopts a method of compensating the performance evaluation accuracy of the heat treatment three-dimensional performance curve diagram to improve the performance evaluation accuracy of the heat treatment three-dimensional performance curve diagram. Therefore, first, the heat treatment performance of the titanium plate strip needs to be detected according to the preset post-weld heat treatment temperature gradient and performance detection index to obtain the heat treatment three-dimensional performance curve diagram. Then, the temperature-property two-dimensional curve is extracted from the heat treatment three-dimensional performance curve diagram by fixing the sampling distance. By sequentially extracting the sampling distances in the sampling distance sequence and then extracting the temperature-property two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve diagram, in order to achieve an adaptive performance evaluation accuracy compensation density for different positions of the heat treatment three-dimensional performance curve diagram, first, equidistant sampling points are taken once on the temperature-property two-dimensional curve according to the temperature sampling gradient to obtain the first equidistant sample point sequence. Then, the absolute value of the slope of each first equidistant sample point in the first equidistant sample point sequence is identified to obtain the first absolute slope sequence. Finally, the first absolute slope curve is drawn according to the first absolute slope sequence. Since the first absolute slope curve can only reflect the change relationship of the index performance with the post-weld heat treatment temperature and cannot reflect the change rate of the index performance with the post-weld heat treatment temperature, it is necessary to take equidistant sampling points twice on the first absolute slope curve according to the temperature sampling gradient to obtain the second equidistant sample point sequence. Then, the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence is identified to obtain the second absolute slope sequence. At this time, the performance evaluation accuracy can be compensated on the heat treatment three-dimensional performance curve diagram according to the second absolute slope sequence to obtain the target three-dimensional performance surface diagram. Finally, by receiving the current weld distance and the current heat treatment temperature, the microstructure performance is identified in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature. Therefore, the present invention can improve the evaluation accuracy and evaluation efficiency of the microstructure performance of the post-weld heat-treated titanium plate strip.

[0071] As Figure 2 shown, it is a functional module diagram of a system for evaluating the microstructure performance of a titanium plate strip based on post-weld heat treatment provided by an embodiment of the present invention.

[0072] The microstructure performance evaluation system 100 of titanium plate strip based on post-weld heat treatment according to the present invention can be installed in an electronic device. According to the functions achieved, the microstructure performance evaluation system 100 of titanium plate strip based on post-weld heat treatment can include a temperature-performance two-dimensional curve extraction module 101, a second absolute slope sequence recognition module 102, a performance evaluation accuracy compensation module 103, and a microstructure performance recognition module 104. The modules in the present invention can also be referred to as units, which refer to a series of computer program segments that can be executed by a processor of an electronic device and can complete fixed functions, and are stored in the memory of the electronic device.

[0073] The temperature-performance two-dimensional curve extraction module 101 is used to perform heat treatment performance detection on a pre-constructed titanium plate strip according to a preset post-weld heat treatment temperature gradient and performance detection index, and obtain a heat treatment three-dimensional performance curve graph, wherein the x-axis of the heat treatment three-dimensional performance curve graph represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; sequentially extract sampling distances in a preset sampling distance sequence, and extract the temperature-performance two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve graph, wherein the independent variable of the temperature-performance two-dimensional curve is the post-weld heat treatment temperature, and the dependent variable is the index performance; the second absolute slope sequence recognition module 102 is used to perform equidistant sampling once on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equidistant sample point sequence; identify the absolute value of the slope of each first equidistant sample point in the first equidistant sample point sequence to obtain a first absolute slope sequence; draw a first absolute slope curve according to the first absolute slope sequence, wherein the independent variable of the first absolute slope curve is the post-weld heat treatment temperature, and the dependent variable is the absolute value of the slope; perform equidistant sampling twice on the first absolute slope curve according to the temperature sampling gradient to obtain a second equidistant sample point sequence; identify the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence to obtain a second absolute slope sequence; the performance evaluation accuracy compensation module 103 is used to perform performance evaluation accuracy compensation on the heat treatment three-dimensional performance curve graph according to the second absolute slope sequence to obtain a target three-dimensional performance surface graph; the microstructure performance recognition module 104 is used to receive the current weld distance and the current heat treatment temperature, and identify the microstructure performance in the target three-dimensional performance surface graph according to the current weld distance and the current heat treatment temperature.

[0074] Specifically, each module in the microstructure performance evaluation system 100 of titanium plate strip based on post-weld heat treatment in the embodiment of the present invention adopts the same technical means as those Figure 1 in the microstructure performance evaluation method of titanium plate strip based on post-weld heat treatment described above, and can produce the same technical effects, which will not be elaborated here.

[0075] As Figure 3As shown in the figure, it is a schematic structural diagram of an electronic device for implementing a method for evaluating the microstructure and properties of titanium plate strips based on post-weld heat treatment provided by an embodiment of the present invention.

[0076] The electronic device 1 may include a processor 10, a memory 11, and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a program for a method for evaluating the microstructure and properties of titanium plate strips based on post-weld heat treatment.

[0077] Among them, the memory 11 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, mobile hard disks, multimedia cards, card-type memories (such as SD or DX memories, etc.), magnetic memories, magnetic disks, optical disks, etc. The memory 11 may be an internal storage unit of the electronic device 1 in some embodiments, such as the mobile hard disk of the electronic device 1. The memory 11 may also be an external storage device of the electronic device 1 in other embodiments, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the electronic device 1. Further, the memory 11 also includes the internal storage unit of the electronic device 1 and an external storage device. The memory 11 can be used not only to store application software installed on the electronic device 1 and various types of data, such as the code of a program for a method for evaluating the microstructure and properties of titanium plate strips based on post-weld heat treatment, but also to temporarily store data that has been output or will be output.

[0078] The processor 10 may be composed of integrated circuits in some embodiments. For example, it may be composed of a single packaged integrated circuit, or may be composed of multiple integrated circuits with the same or different functions, including a combination of one or more Central Processing Units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control core (Control Unit) of the electronic device, connecting various components of the entire electronic device through various interfaces and lines, and by running or executing programs or modules stored in the memory 11 (such as a program for a method for evaluating the microstructure and properties of titanium plate strips based on post-weld heat treatment, etc.), and by calling data stored in the memory 11, to perform various functions of the electronic device 1 and process data.

[0079] The bus 12 can be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 12 can be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to implement the connection and communication between the memory 11 and at least one processor 10, etc.

[0080] Figure 3 Only an electronic device with components is shown. Those skilled in the art can understand that Figure 3 the shown structure does not constitute a limitation on the electronic device 1, and it may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0081] For example, although not shown, the electronic device 1 may further include a power source (such as a battery) for powering each component. Preferably, the power source can be logically connected to the at least one processor 10 through a power management device, so as to implement functions such as charge management, discharge management, and power consumption management through the power management device. The power source may also include any components such as one or more DC or AC power sources, a recharge device, a power failure detection circuit, a power converter or inverter, and a power status indicator. The electronic device 1 may also include various sensors, a Bluetooth module, a Wi-Fi module, etc., which will not be elaborated here.

[0082] Furthermore, the electronic device 1 may further include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0083] Optionally, the electronic device 1 may further include a user interface. The user interface can be a display, an input unit (such as a keyboard), and optionally, the user interface can also be a standard wired interface or a wireless interface. Optionally, in some embodiments, the display can be an LED display, a liquid crystal display, a touch liquid crystal display, and an OLED (Organic Light-Emitting Diode) toucher, etc. Among them, the display can also be appropriately referred to as a display screen or a display unit, which is used to display the information processed in the electronic device 1 and to display a visual user interface.

[0084] The program for the method of evaluating the microstructure properties of titanium plate strips based on post-weld heat treatment stored in the memory 11 in the electronic device 1 is a combination of multiple instructions. When running in the processor 10, it can achieve: performing heat treatment performance detection on a pre-constructed titanium plate strip according to a preset post-weld heat treatment temperature gradient and performance detection indexes to obtain a three-dimensional heat treatment performance curve graph, where the x-axis of the three-dimensional heat treatment performance curve graph represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; sequentially extracting sampling distances in a preset sampling distance sequence, and extracting the temperature-performance two-dimensional curve corresponding to the sampling distance in the three-dimensional heat treatment performance curve graph, where the independent variable of the temperature-performance two-dimensional curve is the post-weld heat treatment temperature and the dependent variable is the index performance; performing equidistant sampling at one time on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equidistant sample point sequence; identifying the absolute value of the slope of each first equidistant sample point in the first equidistant sample point sequence to obtain a first absolute slope sequence; drawing a first absolute slope curve according to the first absolute slope sequence, where the independent variable of the first absolute slope curve is the post-weld heat treatment temperature and the dependent variable is the absolute value of the slope; performing equidistant sampling at a second time on the first absolute slope curve according to the temperature sampling gradient to obtain a second equidistant sample point sequence; identifying the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence to obtain a second absolute slope sequence; performing performance evaluation accuracy compensation on the three-dimensional heat treatment performance curve graph according to the second absolute slope sequence to obtain a target three-dimensional performance surface graph; receiving the current weld distance and the current heat treatment temperature, and identifying the microstructure performance in the target three-dimensional performance surface graph according to the current weld distance and the current heat treatment temperature.

[0085] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 the description of the relevant steps in the corresponding embodiment, which will not be elaborated here.

[0086] Furthermore, if the module / unit integrated in the electronic device 1 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disc, a computer memory, a read-only memory (ROM, Read-Only Memory).

[0087] The present invention also provides a computer-readable storage medium. The readable storage medium stores a computer program, and when the computer program is executed by a processor of an electronic device, it can achieve the following: performing heat treatment performance detection on a pre-constructed titanium strip according to a preset post-weld heat treatment temperature gradient and performance detection index to obtain a three-dimensional heat treatment performance curve graph, where the x-axis of the three-dimensional heat treatment performance curve graph represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; sequentially extracting sampling distances in a preset sampling distance sequence, and extracting a temperature-performance two-dimensional curve corresponding to the sampling distance in the three-dimensional heat treatment performance curve graph, where the independent variable of the temperature-performance two-dimensional curve is the post-weld heat treatment temperature and the dependent variable is the index performance; performing equidistant sampling once on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equidistant sample point sequence; identifying the absolute value of the slope of each first equidistant sample point in the first equidistant sample point sequence to obtain a first absolute slope sequence; plotting a first absolute slope curve according to the first absolute slope sequence, where the independent variable of the first absolute slope curve is the post-weld heat treatment temperature and the dependent variable is the absolute value of the slope; performing equidistant sampling twice on the first absolute slope curve according to the temperature sampling gradient to obtain a second equidistant sample point sequence; identifying the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence to obtain a second absolute slope sequence; performing performance evaluation accuracy compensation on the three-dimensional heat treatment performance curve graph according to the second absolute slope sequence to obtain a target three-dimensional performance surface graph; receiving the current weld distance and the current heat treatment temperature, and identifying the microstructure performance in the target three-dimensional performance surface graph according to the current weld distance and the current heat treatment temperature.

[0088] In several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and methods can be implemented in other ways. For example, the system embodiments described above are only illustrative, and there may be other division methods in actual implementation.

[0089] The modules described as separate components may or may not be physically separated. The components shown as modules may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] In addition, in each embodiment of the present invention, the functional modules can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware, or in the form of a combination of hardware and software functional modules.

[0091] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for evaluating the microstructure performance of titanium plate and strip based on post-weld heat treatment, characterized in that: The method comprises: performing heat treatment performance detection on a pre-constructed titanium plate and strip according to a preset post-weld heat treatment temperature gradient and performance detection index, and obtaining a heat treatment three-dimensional performance curve diagram, wherein the x-axis of the heat treatment three-dimensional performance curve diagram represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; extracting sampling distances in sequence in a preset sampling distance sequence, and extracting a temperature-performance two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve diagram, wherein the independent variable of the temperature-performance two-dimensional curve is the post-weld heat treatment temperature, and the dependent variable is the index performance; performing equidistant sampling on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient, and obtaining a first equidistant sample point sequence; identifying each first sample point in the first equidistant sample point sequence The first absolute slope sequence is obtained by calculating the absolute value of the slope of the equidistant sample points; a first absolute slope curve is drawn according to the first absolute slope sequence, wherein the independent variable of the first absolute slope curve is the post-weld heat treatment temperature, and the dependent variable is the absolute value of the slope; a second equidistant sampling is performed on the first absolute slope curve according to the temperature sampling gradient to obtain a second equidistant sample point sequence; the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence is identified to obtain a second absolute slope sequence; the performance evaluation accuracy is supplemented on the heat treatment three-dimensional performance curve diagram according to the second absolute slope sequence to obtain a target three-dimensional performance surface diagram; the current weld distance and the current heat treatment temperature are received, and the microstructure performance is identified in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature.

2. The method for evaluating the microstructure performance of titanium plate and strip based on post-weld heat treatment according to claim 1, characterized in that: The method of performing heat treatment performance testing on a pre-constructed titanium plate and strip according to a preset post-weld heat treatment temperature gradient and performance testing index to obtain a heat treatment three-dimensional performance curve diagram includes: extracting post-weld heat treatment temperatures in the post-weld heat treatment temperature gradient in sequence, performing post-weld heat treatment on the titanium plate and strip according to the post-weld heat treatment temperatures to obtain a heat-treated titanium plate and strip; selecting a performance testing site sequence on the heat-treated titanium plate and strip according to the sampling distance sequence; performing heat treatment performance testing on each performance testing site in the performance testing site sequence according to the performance testing index to obtain a site performance sequence; performing point fitting in a pre-constructed distance-temperature-performance three-dimensional coordinate system according to the post-weld heat treatment temperature, the sampling distance sequence and the site performance sequence to obtain a heat treatment three-dimensional performance curve, wherein the x-axis of the distance-temperature-performance three-dimensional coordinate system represents the distance from the center of the weld, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; and collecting the heat treatment three-dimensional performance curves corresponding to each heat-treated titanium plate and strip to obtain a heat treatment three-dimensional performance curve diagram.

3. The method for evaluating the microstructure performance of titanium plate and strip based on post-weld heat treatment according to claim 2, characterized in that: The method of extracting a temperature-performance two-dimensional curve corresponding to a sampling distance in a heat treatment three-dimensional performance curve diagram comprises: identifying a weld distance coordinate corresponding to the sampling distance on an x-axis of the distance-temperature-performance three-dimensional coordinate system; drawing a perpendicular plane to the x-axis through the weld distance coordinate; extracting the intersection of the perpendicular plane and each heat treatment three-dimensional performance curve in the heat treatment three-dimensional performance curve diagram to obtain a temperature-performance scatter point set; and fitting the temperature-performance scatter point set to obtain a temperature-performance two-dimensional curve.

4. The method for evaluating the microstructure performance of titanium plate and strip based on post-weld heat treatment according to claim 3, characterized in that: The method of sampling points once at equal intervals on the temperature-performance two-dimensional curve according to the preset temperature sampling gradient to obtain a first equal-interval sampling point sequence includes: calculating the sampling temperature sequence according to the temperature sampling gradient using the following formula: ,in, represents the i-th sampling temperature in the sampling temperature sequence, Indicates the sampling temperature sequence number. represents the temperature sampling gradient, Indicates the minimum post-weld heat treatment temperature in the post-weld heat treatment temperature gradient, Represents the maximum post-weld heat treatment temperature in the post-weld heat treatment temperature gradient; identifies the coordinate point corresponding to each sampling temperature in the sampling temperature sequence on the temperature-performance two-dimensional curve to obtain a first equidistant sample point sequence.

5. The method for evaluating the microstructure performance of titanium plate and strip based on post-weld heat treatment according to claim 4, characterized in that: The method of performing precision supplementation of performance evaluation on a three-dimensional performance curve diagram of heat treatment according to a second absolute slope sequence to obtain a target three-dimensional performance surface diagram comprises: extracting second absolute slopes in the second absolute slope sequence in sequence, identifying second equidistant sample points corresponding to the second absolute slopes; determining a precision supplementation area according to the second equidistant sample points, and performing precision supplementation on the precision supplementation area according to the second absolute slope to obtain a target three-dimensional performance surface diagram.

6. The method for evaluating the microstructure performance of titanium plate and strip based on post-weld heat treatment according to claim 5, characterized in that: The determining of the accuracy supplement area according to the second equidistant sample points includes: identifying the sample point weld distance and the sample point heat treatment temperature of the second equidistant sample points, identifying the distance sampling gradient of the sampling distance sequence, wherein the distance sampling gradient refers to the difference between two adjacent sampling distances in the sampling distance sequence; and calculating the weld distance interval and the heat treatment temperature interval according to the sample point weld distance, the sample point heat treatment temperature, the distance sampling gradient and the temperature sampling gradient using the following formula: ,in, Indicates the minimum value of the weld distance interval, Indicates the distance between sample points and weld seams. represents the distance sampling gradient, Indicates the maximum value of the weld distance interval, Indicates the minimum value of the heat treatment temperature range, Indicates the maximum value of the heat treatment temperature range, Indicates the heat treatment temperature of the sample point; and determines the accuracy supplement area according to the weld distance interval and the heat treatment temperature interval.

7. The method for evaluating the microstructure properties of titanium plates and strips based on post-weld heat treatment according to claim 6, characterized in that: The method of performing precision complementation on the precision complementation area according to the second absolute slope to obtain a target three-dimensional performance surface diagram includes: calculating a heat treatment temperature complementation gradient and a weld distance complementation gradient according to the second absolute slope using a pre-constructed temperature complementation gradient formula and a distance complementation gradient formula; setting a heat treatment temperature complementation point sequence within the heat treatment temperature interval according to the heat treatment temperature complementation gradient, and setting a weld distance complementation point sequence within the weld distance interval according to the weld distance complementation gradient; combining and matching the heat treatment temperature complementation points and the weld distance complementation points in the heat treatment temperature complementation point sequence and the weld distance complementation point sequence to obtain A temperature distance combination set, wherein the number of temperature distance combinations in the temperature distance combination set is equal to the product of the number of heat treatment temperature supplementary points in the heat treatment temperature supplementary point sequence and the number of weld distance supplementary points in the weld distance supplementary point sequence; heat treatment performance testing of the titanium plate and strip is performed according to the temperature distance combination set to obtain a supplementary index performance set; performance coordinate points are supplemented in the heat treatment three-dimensional performance curve diagram according to the correspondence between the temperature distance combinations in the temperature distance combination set and the supplementary index performance in the supplementary index performance set to obtain a target three-dimensional performance scatter point set; surface fitting is performed on the target three-dimensional performance scatter point set to obtain a target three-dimensional performance surface diagram.

8. The method for evaluating the microstructure properties of titanium plates and strips based on post-weld heat treatment according to claim 7, characterized in that: The temperature compensation gradient formula and the distance compensation gradient formula are as follows: ,in, represents the heat treatment temperature complement gradient, represents the dependent temperature adjustment coefficient, e represents the natural constant, represents the independent temperature adjustment coefficient, represents the second absolute slope, Indicates the weld distance compensation gradient, represents the dependent distance adjustment coefficient, Represents the independent variable distance adjustment coefficient.

9. The method for evaluating the microstructure properties of titanium plates and strips based on post-weld heat treatment according to claim 8, characterized in that: The identifying of microstructural properties in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature includes: identifying the current weld distance coordinates and the current heat treatment temperature coordinates on the x-axis and y-axis of the distance-temperature-performance three-dimensional coordinate system according to the current weld distance and the current heat treatment temperature; identifying the corresponding target three-dimensional coordinate points on the target three-dimensional performance surface according to the current weld distance coordinates and the current heat treatment temperature coordinates; identifying the index performance corresponding to the target three-dimensional coordinate points, and completing the identification of microstructural properties.

10. A system for evaluating the microstructure performance of titanium plate and strip based on post-weld heat treatment according to any one of claims 1 to 9, characterized in that: The system includes: a temperature-performance two-dimensional curve extraction module, which is used to perform heat treatment performance detection on a pre-constructed titanium plate and strip according to a preset post-weld heat treatment temperature gradient and performance detection index, and obtain a heat treatment three-dimensional performance curve diagram, wherein the x-axis of the heat treatment three-dimensional performance curve diagram represents the distance from the weld center, the y-axis represents the post-weld heat treatment temperature, and the z-axis represents the index performance; extracting sampling distances in a preset sampling distance sequence in sequence, and extracting a temperature-performance two-dimensional curve corresponding to the sampling distance in the heat treatment three-dimensional performance curve diagram, wherein the independent variable of the temperature-performance two-dimensional curve is the post-weld heat treatment temperature, and the dependent variable is the index performance; a second absolute slope sequence recognition module, which is used to perform an equidistant sampling on the temperature-performance two-dimensional curve according to a preset temperature sampling gradient to obtain a first equidistant sample point sequence; identifying each of the first equidistant sample point sequence The absolute value of the slope of the first equidistant sample point is used to obtain a first absolute slope sequence; a first absolute slope curve is drawn according to the first absolute slope sequence, wherein the independent variable of the first absolute slope curve is the post-weld heat treatment temperature, and the dependent variable is the absolute value of the slope; secondary equidistant sampling is performed on the first absolute slope curve according to the temperature sampling gradient to obtain a second equidistant sample point sequence; the absolute value of the slope of each second equidistant sample point in the second equidistant sample point sequence is identified to obtain a second absolute slope sequence; a performance evaluation accuracy supplement module is used to perform performance evaluation accuracy supplement on the heat treatment three-dimensional performance curve diagram according to the second absolute slope sequence to obtain a target three-dimensional performance surface diagram; a microstructure performance identification module is used to receive the current weld distance and the current heat treatment temperature, and identify the microstructure performance in the target three-dimensional performance surface diagram according to the current weld distance and the current heat treatment temperature.

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