Nondestructive detection method, system and detection probe for austenitic stainless steel weld defects

Abstract

The invention discloses a nondestructive detection method, system and detection probe for austenitic stainless steel weld defects, and relates to the technical field of nondestructive detection.The method comprises the steps that the type of target ultrasonic waves used for conducting nondestructive detection on austenitic stainless steel welds is determined; the electromagnetic ultrasonic phased array detection probe is used for sending out an ultrasonic wave beam of a target sound wave type to penetrate through the austenitic stainless steel weld joint to be detected, and defect detection is conducted on the austenitic stainless steel weld joint to be detected. The method solves the problem that conventional ultrasonic and phased array ultrasonic detection sound beams are difficult to transmit in austenitic stainless steel weld joint materials, overcomes the defects of poor detection resolution and sensitivity in the prior art, and provides a basis for quantitative detection and evaluation of austenitic stainless steel weld joint defects.

Description

Background Art

[0002] Nondestructive testing is also called non-destructive testing. Nondestructive testing is a comprehensive applied technology that measures and evaluates the physical and mechanical properties inside or on the surface of substances without damaging or destroying the objects to be inspected, such as raw materials and workpieces, and includes various defects and other technical parameters. It plays a key role in controlling and improving the production process and product quality, ensuring the reliability of materials, parts, and products, and increasing productivity. It is one of the essential important technical measures for the development of modern industry. Modern nondestructive testing and evaluation technologies not only need to detect the presence or absence of defects but also give a quantitative evaluation of the material quality, including the quantitative measurement of defects, such as the shape, size, position, orientation, distribution, and inclusions of defects, as well as the quality evaluation of defective materials and products, and also include the measurement of certain physical and mechanical properties of materials and products. It can be said that the development level of nondestructive testing and evaluation technologies marks the modern industrial level of a country (region).

[0003] Ultrasonic testing (UT) is a nondestructive testing method that uses the acoustic performance differences between materials and their defects to detect internal defects in materials based on the reflection of ultrasonic wave propagation waveforms and the energy change of the penetration time. The longitudinal wave is used in vertical testing by the pulse echo method, and the transverse wave is used in oblique flaw detection. The pulse echo method has longitudinal wave testing and transverse wave testing. On the oscilloscope screen of the ultrasonic instrument, the abscissa represents the propagation time of the sound wave, and the ordinate represents the amplitude of the echo signal. For the same homogeneous medium, the propagation time of the pulse wave is proportional to the sound path. Therefore, the presence of a defect is judged by the appearance of the defect echo signal, the distance from the defect to the detection surface is determined by the position where the echo signal appears to achieve defect location, and the equivalent size of the defect is judged by the echo amplitude.

[0004] Phased Array Ultrasonic Testing (PAUT) detection technology is based on the Huygens principle. The transducer consists of an array of multiple independent piezoelectric wafers, and each wafer is called a unit. Each unit is excited by an electronic system according to certain rules and time sequences, so that the ultrasonic waves emitted by each unit in the array are superimposed to form a new wavefront. Similarly, during the reception of the reflected wave, the reception of each receiving unit is controlled according to certain rules and time sequences and signal synthesis is carried out, and then the synthesis result is displayed in an appropriate form. By exciting each independent piezoelectric wafer (element) of the phased array probe according to the set delay rule (or focusing rule), the sound beam is synthesized and functions such as the movement, deflection, and focusing of the sound beam are realized. The ultrasonic detection technology that receives ultrasonic signals according to a certain delay rule and displays the internal state of the inspected object graphically can generate the same sound beam and angle as conventional ultrasonic, but the difference from conventional ultrasonic detection is that it can accurately control the angle and focus size of the sound beam electronically and can achieve various display methods such as A-display, B-display, C-display, D-display, and S-display.

[0005] Electromagnetic Acoustic Transducer (EMAT) detection is a relatively new ultrasonic detection method. Under the action of a static bias magnetic field, an alternating current is passed through the coil, thereby generating eddy currents on the surface of the test piece. The bias magnetic field and the eddy currents act together, and the test piece will be subjected to the Lorentz force or magnetostrictive effect, thereby generating vibrations. EMAT directly generates vibrations in the test piece, and the detection object can only be a conductor component. EMAT has the following characteristics compared with piezoelectric ultrasonic: no coupling agent is required, various wave types can be generated flexibly, the detection range is large, and the sensitivity is high.

[0006] Austenitic stainless steel is widely used in important components of the special equipment industry due to its excellent corrosion resistance, oxidation resistance, and low-temperature toughness. It has been found in practice that austenitic stainless steel is very prone to hot cracks during welding and use, posing potential safety hazards. To ensure the safe operation of the equipment, non-destructive testing of austenitic stainless steel materials and welds must be carried out. Ultrasonic testing is a commonly used non-destructive testing method for austenitic stainless steel. However, due to the columnar grains in austenitic welds, the sound beam will be bent, affecting the positioning of ultrasonic testing defects; the coarse grains cause serious attenuation of sound waves, reducing the signal-to-noise ratio of ultrasonic testing, affecting the quantification of defects and the defect detection rate; the sound velocity of the base material and the weld is quite different, and the non-uniformity of the weld sound velocity affects the positioning and qualitative analysis of ultrasonic testing defects. Therefore, the detection of austenitic stainless steel welds has always been one of the difficulties in non-destructive testing. With the rapid development of phased array ultrasonic technology in recent years, the phased array ultrasonic testing technology with the advantages of high detection reliability, good detection resolution, fast detection speed, and high detection efficiency has brought new ideas for the non-destructive testing of austenitic stainless steel welds.

[0007] Due to the characteristics of the anisotropic grain structure of austenitic stainless steel welds, longitudinal wave / low-frequency detection should be selected when applying conventional ultrasonic testing and phased array ultrasonic testing. In recent years, with the development of electromagnetic ultrasonic testing technology, electromagnetic ultrasound can flexibly generate various wave types, and the detection frequency is relatively low. Combining the characteristics of phased array ultrasonic testing with beam deflection and focusing, it is very necessary to invent an electromagnetic ultrasonic phased array detection technology that is less affected by the anisotropic grain structure and can effectively detect the non-destructive testing method of austenitic stainless steel welds. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a non-destructive testing method, system and detection probe for defects in austenitic stainless steel welds in view of the deficiencies of the prior art, specifically as follows:

[0009] 1) In the first aspect, the present invention provides a non-destructive testing method for defects in austenitic stainless steel welds, and the specific technical solution is as follows:

[0010] Determine the target ultrasonic wave type used for non-destructive testing of austenitic stainless steel welds;

[0011] Use an electromagnetic ultrasonic phased array detection probe to emit an ultrasonic beam of the target wave type to pass through the austenitic stainless steel weld to be detected, and perform defect detection on the austenitic stainless steel weld to be detected.

[0012] The beneficial effects of the non-destructive testing method for defects in austenitic stainless steel welds provided by the present invention are as follows:

[0013] It solves the problem that the ultrasonic beam transmission is difficult in the austenitic stainless steel weld material during conventional ultrasonic and phased array ultrasonic testing, overcomes the disadvantages of poor detection resolution and sensitivity in the prior art, and provides a basis for quantitative detection and evaluation of defects in austenitic stainless steel welds.

[0014] On the basis of the above solution, the non-destructive testing method for defects in austenitic stainless steel welds of the present invention can also be improved as follows.

[0015] Further, determining the target wave type used for non-destructive testing of austenitic stainless steel welds includes:

[0016] Obtain the distortion degree of ultrasonic beams of different ultrasonic wave types after passing through the austenitic stainless steel weld, and determine the ultrasonic wave type with the smallest distortion degree as the target ultrasonic wave type.

[0017] Further, the target ultrasonic wave type is SH wave.

[0018] Further, the electromagnetic ultrasonic phased array detection probe: has multiple SH wave channels, and has the functions of one-transmission-one-reception phased array deflection focusing and low frequency.

[0019] 2) In the second aspect, the present invention also provides a non-destructive testing system for austenitic stainless steel weld defects, and the specific technical solution is as follows:

[0020] It includes an ultrasonic type determination module and a defect detection module;

[0021] The ultrasonic type determination module is used to: determine the target ultrasonic type used for non-destructive testing of austenitic stainless steel welds;

[0022] The defect detection module is used to: emit an ultrasonic beam of the target wave type through an electromagnetic ultrasonic phased array detection probe to pass through the austenitic stainless steel weld to be detected, and perform defect detection on the austenitic stainless steel weld to be detected.

[0023] Based on the above solution, the non-destructive testing system for austenitic stainless steel weld defects of the present invention can also be improved as follows.

[0024] Further, the ultrasonic type determination module is specifically used to: obtain the distortion degree of ultrasonic beams of different ultrasonic types after passing through the austenitic stainless steel weld, and determine the ultrasonic type with the smallest distortion degree as the target ultrasonic type.

[0025] Further, the target ultrasonic type is an SH wave.

[0026] Further, the electromagnetic ultrasonic phased array detection probe has multiple SH wave channels, and has the functions of one-transmit-one-receive phased array deflection focusing and low frequency.

[0027] 3) In the third aspect, the present invention also provides an electromagnetic ultrasonic phased array detection probe, and the specific technical solution is as follows:

[0028] The electromagnetic ultrasonic phased array detection probe has multiple SH wave channels, and has the functions of one-transmit-one-receive phased array deflection focusing and low frequency;

[0029] When determining the target ultrasonic type used for non-destructive testing of austenitic stainless steel welds, the electromagnetic ultrasonic phased array detection probe emits an ultrasonic beam of the target wave type to pass through the austenitic stainless steel weld to be detected.

[0030] Based on the above solution, the electromagnetic ultrasonic phased array detection probe of the present invention can also be improved as follows.

[0031] Further, the target ultrasonic type is an SH wave.

[0032] It should be noted that for the beneficial effects obtained by the technical solutions of the second aspect to the third aspect of the present invention and the corresponding possible implementation manners, reference can be made to the technical effects of the first aspect and its corresponding possible implementation manners described above, and details are not described herein again. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non - limiting embodiments read in conjunction with the accompanying drawings:

[0034] Figure 1 Schematic flow diagram of a non - destructive testing method for austenitic stainless steel weld defects in an embodiment of the present invention;

[0035] Figure 2 L - wave transmission beam path in the weld;

[0036] Figure 3 SV - wave transmission beam path in the weld;

[0037] Figure 4 SH - wave transmission beam path in the weld;

[0038] Figure 5 Comparison data of L - wave, SV - wave, and SH - wave transmission twist angles;

[0039] Figure 6 Electromagnetic ultrasonic testing principle for generating SH horizontally polarized shear waves. β is the ultrasonic incident angle, λ is the acoustic wavelength, and d is the pole pitch between adjacent S / N poles of the periodic magnet;

[0040] Figure 7 One - transmit - one - receive deflection focusing phased array testing principle;

[0041] Figure 8 Echo spectrum analysis (frequency 600 kHz) diagram detected by an electromagnetic ultrasonic phased array testing probe;

[0042] Figure 9 External shape structure of an electromagnetic ultrasonic phased array testing probe;

[0043] Figure 10 Control system of an electromagnetic ultrasonic phased array testing probe;

[0044] Figure 11 Schematic diagram of the electromagnetic coil of an electromagnetic ultrasonic phased array testing probe;

[0045] Figure 12 Detecting artificial defects using the electromagnetic ultrasonic phased array testing probe in the present invention;

[0046] Figure 13 Scanning diagram of an electromagnetic ultrasonic phased array for detecting surface grooves in a weld;

[0047] Figure 14 Scanning diagram of an electromagnetic ultrasonic phased array for detecting a central through - hole in a weld;

[0048] Figure 15It is a scanning diagram of the bottom groove of the weld detected by electromagnetic ultrasonic phased array;

[0049] Figure 16 It is a scanning diagram of the surface crack of the weld detected by phased array ultrasonic longitudinal wave;

[0050] Figure 17 It is a scanning diagram of the lack of fusion at the weld groove detected by phased array ultrasonic longitudinal wave;

[0051] Figure 18 It is a scanning diagram of the lack of fusion at the weld root detected by phased array ultrasonic longitudinal wave;

[0052] Figure 19 It is a scanning diagram of the dense porosity inside the weld detected by phased array ultrasonic longitudinal wave;

[0053] Figure 20 It is a schematic structural diagram of the computer device according to the embodiment of the present invention. Detailed implementation manners

[0054] To make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0055] As Figure 1 shown, a non-destructive testing method for austenitic stainless steel weld defects according to an embodiment of the present invention includes the following steps:

[0056] S1. Determine the target ultrasonic wave type used for non-destructive testing of austenitic stainless steel welds;

[0057] S2. Use an electromagnetic ultrasonic phased array detection probe to emit an ultrasonic wave beam of the target wave type to pass through the austenitic stainless steel weld to be detected, and perform defect detection on the austenitic stainless steel weld to be detected.

[0058] Among them, the specific implementation process of defect detection: when using an electromagnetic ultrasonic phased array probe for detection, the low-frequency SH wave generated by applying electromagnetic ultrasonic technology is used, and then the phased array detection technology is used to focus and deflect the SH wave to detect the austenitic stainless steel weld, and its detection effect is better than that of longitudinal wave (L wave) and phased array longitudinal wave.

[0059] A non-destructive testing method for austenitic stainless steel weld defects provided by the present invention solves the problem that the sound beam of conventional ultrasonic and phased array ultrasonic testing is difficult to transmit in the austenitic stainless steel weld material, overcomes the disadvantages of poor detection resolution and sensitivity in the prior art, and provides a basis for quantitative detection and evaluation of austenitic stainless steel weld defects.

[0060] Optionally, in the above technical solution, determining the target wave type used for non-destructive testing of austenitic stainless steel welds includes:

[0061] Obtain the distortion degrees of ultrasonic beams of different ultrasonic types after passing through austenitic stainless steel welds, and determine the ultrasonic type with the minimum distortion degree as the target ultrasonic type.

[0062] As Figure 5 shown, Figure 5 it is defined that the deformation degree of waves corresponding to different waves (such as L waves, SV waves, SH waves, etc.) at different refraction angles after passing through a stainless steel weld is the distortion angle.

[0063] Optionally, in the above technical solution, the target ultrasonic type is the SH wave.

[0064] Compared with ferritic steel welds, the weld microstructure of austenitic stainless steel is quite different. During the solidification of austenitic stainless steel welds, no phase transformation occurs, and they exist as as-cast columnar austenite grains at room temperature. The general characteristics of this weld microstructure are: large grains; columnar grains and anisotropy; obvious heterogeneous interfaces with the base metal, especially significant microstructure changes at the fusion surface; the weld microstructure is greatly affected by welding processes and specifications.

[0065] Due to the changes in weld grains in austenitic stainless steel welds, various problems occur. For ultrasonic waves propagating in anisotropic media, the transmission direction of ultrasonic energy is not perpendicular to the wavefront, which will cause the ultrasonic beam to be distorted. For example, the propagation situations of probes with a refraction angle of 60 ° passing through austenitic stainless steel welds with longitudinal waves (L waves), vertically polarized shear waves (SV waves), and horizontally polarized shear waves (SH waves) respectively are as Figures 2 to 5 shown. Both theoretical calculations and experimental results prove that the maximum distortion angle of longitudinal waves is about 15 ° ~20 ° , the maximum distortion angle of SV waves can reach 50 ° , and the maximum distortion angle of SH waves does not exceed 5 ° or less. When detecting defects in austenitic stainless steel welds, the sound beam changes with the angle with the columnar grains, and the change degrees of sound beams of different wave types are quite different, which may lead to changes in positioning and angles. Since the influence of SV waves, longitudinal waves, and SH waves on the anisotropic grain structure weakens in turn, it can be concluded that using SH horizontally polarized shear waves is the best choice for detecting defects in austenitic stainless steel welds.

[0066] Optionally, in the above technical solution, the electromagnetic ultrasonic phased array detection probe: has multiple SH wave channels, and has the functions of one-transmit-one-receive phased array deflection focusing and low frequency.

[0067] Among them, 1 channel emits or receives 1 beam of wave, and it can also be 1 channel, 2 channels, 3 channels, etc. The more channels, the higher the scanning efficiency, which can be set according to the actual situation.

[0068] Among them, one transmitting and one receiving means that the signal transmitted by the probe enters the material (such as a stainless steel weld), is reflected after encountering a defect, and then is received by the probe and returned to the instrument, and is displayed on the instrument screen.

[0069] Since the maximum distortion angle of the horizontally polarized shear wave (SH wave) is small, the sound beam is relatively concentrated and the frequency of the generated SH wave is small. Therefore, it will be a more optimized detection method to use the generated SH wave combined with the characteristics of beam scanning, deflection and focusing of phased array detection to detect the defects of austenitic stainless steel welds, that is, designing an electromagnetic ultrasonic phased array detection probe to detect the defects of austenitic stainless steel welds is superior to other detection methods (such as longitudinal waves, SV waves, etc.). In addition, due to the characteristics of the one transmitting and one receiving (T / R) probe detection: there is no "blind zone" for near-surface detection; the interference echoes caused by internal reflections in the wedge are eliminated; better detection sensitivity and signal-to-noise ratio can be obtained from the convolution of the beams of the T and R probes.

[0070] Therefore, the present invention provides an electromagnetic ultrasonic phased array detection probe with multi-channel SH horizontally polarized waves, with one transmitting and one receiving phased array deflection focusing and low frequency (frequency 600 kHz) functions to detect the defects of austenitic stainless steel welds, such as Figures 6 to 11 shown.

[0071] Among them, the structure of the electromagnetic ultrasonic phased array probe consists of a coil, a magnet and the workpiece to be detected. Working principle: the process of generating SH waves through electromagnetic ultrasound and using phased array technology for focusing and deflection for detection. Figure 4 It shows that the electromagnetic ultrasonic phased array has good detection effect in stainless steel weld detection, Figure 5 compares the propagation effects of L waves, SV waves and SH waves in stainless steel welds, Figure 6 is the schematic diagram of generating SH, Figure 7 is the schematic diagram of phased array detection.

[0072] Optionally, in the above technical solution, it further includes the detection calibration test block and artificial defect design. Specifically:

[0073] In order to verify that the designed electromagnetic ultrasonic phased array detection of austenitic stainless steel weld defects can detect accurately, quickly and conveniently, grooves are made on the upper surface (groove depth is 10% of the wall thickness), middle transverse through holes (hole diameter is 2 mm) and lower surface grooves (groove depth is 5% of the wall thickness) on the austenitic stainless steel welds of the same specification, as Figure 3 shown. The upper surface groove is used to simulate the upper surface defects of the weld, the middle transverse through hole is used to simulate the internal defects of the weld, and the lower surface groove is used to simulate the lower surface defects of the weld.

[0074] Optionally, in the above technical solution, it further includes the comparative analysis of the detection results. Specifically:

[0075] Since the electromagnetic ultrasonic phased array testing technology for austenitic stainless steel welds has the characteristics of electromagnetic ultrasonic testing: non-contact testing; suitable for high-temperature testing; fast testing speed; high testing sensitivity, and also has the characteristics of phased array ultrasonic longitudinal wave testing: the acoustic beam angle is precisely controllable and highly flexible; acoustic beam focusing can be achieved, and better testing sensitivity, resolution and signal-to-noise ratio can be obtained; the testing results are displayed in the form of images, intuitive and recordable, with good repeatability; high testing efficiency and no radiation harm to the human body.

[0076] Artificial defects detected by the electromagnetic ultrasonic phased array testing probe in the present invention, such as Figure 12 shown, and the obtained testing and scanning results are as Figures 13 to 15 shown. Similarly, phased array ultrasonic longitudinal wave probes were designed to detect typical defects such as surface cracks, lack of fusion at the groove, lack of fusion at the root, and internal dense pores in austenitic stainless steel welds, and the obtained testing and scanning results are as Figures 16 to 19 shown.

[0077] From the comparison between the electromagnetic ultrasonic phased array testing results and the phased array ultrasonic longitudinal wave testing results of austenitic stainless steel welds, it can be concluded that the electromagnetic ultrasonic phased array testing of austenitic stainless steel weld defects has better testing sensitivity, resolution and signal-to-noise ratio; acoustic beam deflection and focusing can be achieved; the testing results are displayed in the form of images, intuitive and recordable; non-contact, high-temperature and high-speed testing can also be carried out, and the application prospect is broader.

[0078] A non-destructive testing method for austenitic stainless steel weld defects in the present invention is specifically a non-destructive testing method for electromagnetic ultrasonic phased array testing (EMAT / PAUT) of austenitic stainless steel weld defects. The feasibility of the non-destructive testing method for electromagnetic ultrasonic phased array testing of austenitic stainless steel weld defects is verified from aspects such as transmission acoustic beam simulation optimization and selection, electromagnetic ultrasonic phased array testing probe design, testing calibration block and artificial defect design, and testing result comparative analysis. Specifically:

[0079] 1) Transmission acoustic beam simulation optimization and selection. Through the simulation optimization of the transmission acoustic beams of longitudinal waves, SV vertically polarized shear waves and SH horizontally polarized shear waves, the SH horizontally polarized shear wave with the smallest maximum distortion angle of the transmission acoustic beam is selected for testing.

[0080] 2) An electromagnetic ultrasonic phased array testing probe is designed. This probe uses SH horizontally polarized shear waves, has a concentrated acoustic beam, a low testing frequency (frequency 600 kHz), and can deflect and focus, etc.

[0081] 3) Design of testing calibration blocks and artificial defects. Grooves and transverse through-holes are made on the upper surface, middle position and lower surface of austenitic stainless steel welds, mainly used to simulate upper surface defects, internal defects and lower surface defects of austenitic stainless steel welds.

[0082] 4) Comparative analysis of detection results. By comparing the electromagnetic ultrasonic phased array detection results with the phased array ultrasonic longitudinal wave detection results, it can be concluded that the electromagnetic ultrasonic phased array detection method for austenitic stainless steel weld defects has better detection effects than other detection methods (such as phased array ultrasonic longitudinal wave detection, etc.).

[0083] In the above embodiments, although the steps are numbered S1, S2, etc., they are only specific embodiments given by the present invention. Those skilled in the art can adjust the execution order of S1, S2, etc. according to the actual situation, which is also within the protection scope of the present invention. It can be understood that in some embodiments, it may include some or all of the above embodiments.

[0084] A non-destructive testing system for austenitic stainless steel weld defects according to an embodiment of the present invention includes an ultrasonic type determination module and a defect detection module;

[0085] The ultrasonic type determination module is used to: determine the target ultrasonic type used for non-destructive testing of austenitic stainless steel welds;

[0086] The defect detection module is used to: use an electromagnetic ultrasonic phased array detection probe to emit an ultrasonic beam of the target acoustic wave type to pass through the austenitic stainless steel weld to be detected, and perform defect detection on the austenitic stainless steel weld to be detected.

[0087] Optionally, in the above technical solution, the ultrasonic type determination module is specifically used to: obtain the distortion degree of ultrasonic beams of different ultrasonic types after passing through the austenitic stainless steel weld, and determine the ultrasonic type with the smallest distortion degree as the target ultrasonic type.

[0088] Optionally, in the above technical solution, the target ultrasonic type is an SH wave.

[0089] Optionally, in the above technical solution, the electromagnetic ultrasonic phased array detection probe has multiple SH wave channels, and has the functions of one-transmitter one-receiver phased array deflection focusing and low frequency.

[0090] It should be noted that the beneficial effects of the non-destructive testing system for austenitic stainless steel weld defects provided in the above embodiments are the same as those of the non-destructive testing method for austenitic stainless steel weld defects, which will not be elaborated here. In addition, when the system provided in the above embodiments realizes its functions, only the above-mentioned functional module division is used for illustration. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the system is divided into different functional modules according to the actual situation to complete all or part of the functions described above. In addition, the system provided in the above embodiments and the method embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be elaborated here.

[0091] Such asFigure 20 As shown in Figure 20 , a computer device 300 according to an embodiment of the present invention includes a processor 320, the processor 320 is coupled to a memory 310, and at least one computer program 330 is stored in the memory 310. The at least one computer program 330 is loaded and executed by the processor 320 to enable the computer device 300 to implement any one of the above non-destructive testing methods for austenitic stainless steel weld defects. Specifically:

[0092] The computer device 300 may vary greatly due to configuration or performance differences, and may include one or more processors 320 (Central Processing Units, CPUs) and one or more memories 310. Among them, at least one computer program 330 is stored in the one or more memories 310, and the at least one computer program 330 is loaded and executed by the one or more processors 320 to enable the computer device 300 to implement any one of the non-destructive testing methods for austenitic stainless steel weld defects provided in the above embodiments. Of course, the computer device 300 may also have components such as a wired or wireless network interface, a keyboard, and an input / output interface for input / output. The computer device 300 may also include other components for implementing the functions of the device, which will not be elaborated here.

[0093] A computer-readable storage medium according to an embodiment of the present invention stores at least one computer program, and the at least one computer program is loaded and executed by a processor to enable a computer to implement any one of the above non-destructive testing methods for austenitic stainless steel weld defects.

[0094] Optionally, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0095] An electromagnetic ultrasonic phased array detection probe according to an embodiment of the present invention has multiple SH wave channels and has functions of one-transmitter one-receiver phased array deflection focusing and low frequency.

[0096] When determining the target ultrasonic wave type used for non-destructive testing of austenitic stainless steel welds, the electromagnetic ultrasonic phased array detection probe emits an ultrasonic wave beam of the target wave type to pass through the austenitic stainless steel weld to be detected.

[0097] Optionally, in the above technical solution, the target ultrasonic wave type is SH wave.

[0098] In an exemplary embodiment, a computer program product or a computer program is further provided. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes any one of the above non-destructive testing methods for austenitic stainless steel weld defects.

[0099] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to limit a specific order or sequence. In appropriate cases, the order of use of similar objects can be interchanged, so that the embodiments of the present application described herein can be implemented in an order other than the illustrated or described order.

[0100] Those skilled in the art know that the present invention can be implemented as a system, a method or a computer program product. Therefore, the present disclosure can be specifically implemented in the following forms, that is, it can be completely hardware, can also be completely software (including firmware, resident software, microcode, etc.), and can also be a combination of hardware and software, which is generally referred to as "circuit", "module" or "system" in this article. In addition, in some embodiments, the present invention can also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable media contains computer-readable program code.

[0101] Any combination of one or more computer-readable media can be adopted. The computer-readable media can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage medium include: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer-readable storage medium can be any tangible medium that contains or stores a program, and the program can be used by or in combination with an instruction execution system, apparatus, or device.

[0102] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A non-destructive testing method for weld defects of austenitic stainless steel, characterized in that, Including: Determine the target ultrasonic wave type used for non-destructive testing of austenitic stainless steel welds; Use an electromagnetic ultrasonic phased array detection probe to emit an ultrasonic wave beam of the target wave type to pass through the austenitic stainless steel weld to be detected, and perform defect detection on the austenitic stainless steel weld to be detected.

2. The non-destructive testing method for austenitic stainless steel weld defects according to claim 1, characterized in that, Determining the target wave type used for non-destructive testing of austenitic stainless steel welds includes: Obtain the distortion of ultrasonic wave beams of different ultrasonic wave types after passing through the austenitic stainless steel weld, and determine the ultrasonic wave type with the smallest distortion as the target ultrasonic wave type.

3. The non-destructive testing method for austenitic stainless steel weld defects according to claim 1 or 2, characterized in that, The target ultrasonic wave type is the SH wave.

4. The non-destructive testing method for austenitic stainless steel weld defects according to claim 1 or 2, characterized in that, The electromagnetic ultrasonic phased array detection probe: has multiple SH wave channels, and has the functions of one-transmission-one-reception phased array deflection focusing and low frequency.

5. A non-destructive testing system for austenitic stainless steel weld defects, characterized in that, Including an ultrasonic wave type determination module and a defect detection module; The ultrasonic wave type determination module is used to: determine the target ultrasonic wave type used for non-destructive testing of austenitic stainless steel welds; The defect detection module is used to: use an electromagnetic ultrasonic phased array detection probe to emit an ultrasonic wave beam of the target wave type to pass through the austenitic stainless steel weld to be detected, and perform defect detection on the austenitic stainless steel weld to be detected.

6. The non-destructive testing system for austenitic stainless steel weld defects according to claim 5, characterized in that, The ultrasonic wave type determination module is specifically used to: obtain the distortion of ultrasonic wave beams of different ultrasonic wave types after passing through the austenitic stainless steel weld, and determine the ultrasonic wave type with the smallest distortion as the target ultrasonic wave type.

7. The non-destructive testing system for austenitic stainless steel weld defects according to claim 5 or 6, characterized in that, The target ultrasonic wave type is the SH wave.

8. The non-destructive testing system for austenitic stainless steel weld defects according to claim 5 or 6, characterized in that, The electromagnetic ultrasonic phased array detection probe has multiple SH wave channels, and has the functions of one-transmission-one-reception phased array deflection focusing and low frequency.

9. An electromagnetic ultrasonic phased array detection probe, characterized in that, The electromagnetic ultrasonic phased array detection probe has multiple SH wave channels, and has the functions of one-transmission-one-reception phased array deflection focusing and low frequency; When determining the target ultrasonic wave type used for non-destructive testing of austenitic stainless steel welds, the electromagnetic ultrasonic phased array detection probe emits an ultrasonic wave beam of the target wave type to pass through the austenitic stainless steel weld to be detected.

10. An electromagnetic ultrasonic phased array detection probe according to claim 9, characterized in that, The target ultrasonic wave type is the SH wave.

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