Stainless steel weld joint standard sample test block and stainless steel weld joint defect eddy current array detection process

Abstract

The invention discloses a stainless steel weld joint standard sample test block and a stainless steel weld joint defect eddy current array detection process, the stainless steel weld joint standard sample test block has a plurality of types of defect structures including flat-bottom holes, obliquely arranged notch grooves, transversely arranged notch grooves, longitudinally arranged notch grooves and the like, and can be used for parameter setting verification of a detection instrument. The accuracy of the detection instrument is ensured, and the reliability of the detection instrument in weld defect identification is improved. By adopting the stainless steel weld defect eddy current array detection process, through verification of the stainless steel weld standard sample test block (as a standard test block), the accuracy of the detection instrument is ensured, and the reliability of the detection instrument in weld defect identification is improved, so that the detection instrument can accurately detect the weld defects according to different workpieces and weld defect types. And the parameter setting of the detection instrument is adjusted, so that the accuracy and applicability of the detection instrument are improved.

Description

Technical Field

[0001] The invention relates to the field of metal defect detection technology, and in particular to a stainless steel weld standard sample test block and a stainless steel weld defect eddy current array detection technology. Background Art

[0002] Stainless steel is widely used in nuclear power plant containment, heat exchangers and other equipment that withstand high temperature, high pressure and corrosive environment due to its excellent performance. Welding, as a process and technology for joining metals, is widely used in nuclear power plant equipment. Welding welds are often the weak link of equipment and are prone to defects such as cracks and stress corrosion. Welds are the focus of attention and inspection during regular inspections of nuclear power equipment. Eddy current testing is widely used in weld defect detection due to its high sensitivity to surface defects of conductive materials. Weld defects come in various forms and directions. Different defect forms and directions have a significant impact on the detection structure, and missed detection is prone to occur. Therefore, appropriate detection methods and processes are particularly important for characterizing real defects. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a stainless steel weld standard sample test block and a stainless steel weld defect eddy current array detection process.

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct a stainless steel weld standard test block, including a test block body, the test block body has a first surface and a second surface opposite to each other, the first surface is a plane;

[0005] The test block body includes a first substrate and a second substrate, the first substrate and the second substrate are welded and fixed, and a weld is formed between the first substrate and the second substrate; a first surface of the test block body is provided with a plurality of defect structures, and the plurality of defect structures include a plurality of flat-bottom holes and a plurality of grooves.

[0006] In some embodiments, the plurality of flat-bottom holes include a first flat-bottom hole, a second flat-bottom hole, and a third flat-bottom hole;

[0007] The first flat bottom hole is located in the first substrate, the second flat bottom hole is located in the weld, half of the third flat bottom hole is located in the weld, and half of the third flat bottom hole is located in the second substrate.

[0008] In some embodiments, the dimensions of the first flat bottom hole, the second flat bottom hole, and the third flat bottom hole are: 1 mm in depth and 3.2 mm in diameter.

[0009] In some embodiments, the plurality of grooves include a first groove, a second groove, and a third groove;

[0010] The first groove, the second groove and the third groove are inclined grooves, the first groove, the second groove and the third groove are arranged at an acute angle with the length direction of the weld, and the first groove, the second groove and the third groove are all in the shape of long strips;

[0011] The first groove is located at the first substrate, the second groove is located at the welding seam, half of the third groove is located at the welding seam, and half of the third groove is located at the second substrate.

[0012] In some embodiments, the first groove, the second groove, and the third groove are arranged at 45° with respect to the length direction of the weld.

[0013] In some embodiments, the plurality of grooves further include a fourth groove, a fifth groove and a sixth groove; the fourth groove, the fifth groove and the sixth groove are all in the shape of long strips, and the length directions of the fourth groove, the fifth groove and the sixth groove are perpendicular to the length direction of the weld;

[0014] The fourth groove is located at the first substrate, the fifth groove is located at the welding seam, half of the sixth groove is located at the welding seam, and half of the sixth groove is located at the second substrate.

[0015] In some embodiments, the plurality of grooves further include a seventh groove, an eighth groove and a ninth groove; the seventh groove, the eighth groove and the ninth groove are all in the shape of long strips, and the length directions of the seventh groove, the eighth groove and the ninth groove are parallel to the length direction of the weld;

[0016] The seventh groove is located at the first substrate, the eighth groove is located at the welding seam, half of the ninth groove is located at the welding seam, and half of the ninth groove is located at the second substrate.

[0017] In some embodiments, sizes of the first groove, the second groove, the third groove, the fourth groove, the fifth groove, the sixth groove, the seventh groove, the eighth groove and the ninth groove are all the same.

[0018] In some embodiments, the dimensions of the first groove, the second groove, the third groove, the fourth groove, the fifth groove, the sixth groove, the seventh groove, the eighth groove and the ninth groove are all 4.8 mm in length, 0.25 mm in width and 1 mm in depth.

[0019] In some embodiments, the groove further includes a tenth groove, the tenth groove is in the shape of a long strip, the length direction of the tenth groove is perpendicular to the length direction of the weld, and the tenth groove is located in the second substrate.

[0020] In some embodiments, the dimensions of the tenth groove are: length 50 mm, width 0.25 mm, depth 1 mm.

[0021] The present application also discloses a stainless steel weld defect eddy current array detection process, comprising the following steps:

[0022] S1: preparing a stainless steel weld standard sample test block, wherein the stainless steel weld standard sample test block is the stainless steel weld standard sample test block described in any of the above embodiments;

[0023] Step S2: Select an eddy current array probe and calibrate the detection instrument;

[0024] Step S3: setting parameters of the detection instrument;

[0025] Step S4: the testing instrument performs verification testing on the stainless steel weld standard test block to obtain verification test results;

[0026] Step S5: Determine whether the verification test result meets the requirements. If the verification test result does not meet the requirements, repeat steps S2 to S4 or repeat steps S3 to S4 until the verification test result meets the requirements. If the verification test result meets the requirements, execute step S6.

[0027] Step S6: The detection instrument detects the on-site components.

[0028] In some embodiments, in step S2, selecting an eddy current array probe includes: selecting a flexible eddy current array probe with 30 axial coils and 14 transverse coils.

[0029] In some embodiments, in step S3, the parameters of the detection instrument are set, including: setting the gain to 40 dB, axial and lateral fusion, encoder sampling rate to 1 / mm, maximum speed not exceeding 600 mm / s, amplitude calibration, excitation frequency to 1 MHz, excitation voltage to 9.5 volts, and median filtering.

[0030] The implementation of the present invention has the following beneficial effects: the stainless steel weld standard sample block has various types of defect structures, including flat-bottom holes and inclined grooves, transverse grooves and longitudinal grooves, etc., which can be used to verify the parameter settings of the detection instrument, ensure the accuracy of the detection instrument, and improve the reliability of the detection instrument in identifying weld defects.

[0031] The stainless steel weld defect eddy current array detection process is adopted and verified by a stainless steel weld standard sample test block (as a standard test block) to ensure the accuracy of the detection instrument and improve the reliability of the detection instrument in identifying weld defects. The detection instrument can adjust the parameter settings of the detection instrument according to different workpieces and weld defect types, thereby improving the accuracy and applicability of the detection instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0033] Figure 1 It is one of the structural schematic diagrams of the stainless steel weld standard sample block in some embodiments of the present invention;

[0034] Figure 2 This is the second structural schematic diagram of the stainless steel weld standard sample block in some embodiments of the present invention;

[0035] Figure 3 It is one of the parameter schematic diagrams of the stainless steel weld standard sample block in some embodiments of the present invention;

[0036] Figure 4 2 is a schematic diagram of parameters of a stainless steel weld standard test block in some embodiments of the present invention;

[0037] Figure 5 3 is a parameter schematic diagram of a stainless steel weld standard sample block in some embodiments of the present invention;

[0038] Figure 6 is a schematic diagram of an eddy current array detection process for stainless steel weld defects in some embodiments of the present invention;

[0039] Figure 7 This is the axial test result diagram along the weld direction of the stainless steel weld standard sample block;

[0040] Figure 8 This is a graph showing the axial and transverse fusion test results along the weld direction of the stainless steel weld standard sample block. DETAILED DESCRIPTION

[0041] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0042] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0044] See also Figure 1 to Figure 2 The present invention shows a stainless steel weld standard test block, including a test block body 10, the test block body 10 is roughly a square structure, such as Figures 3 to 5 The dimensions of the test block body 10 are approximately: 250 mm in length, 200 mm in width, 5 mm in thickness, and the thickness of the test block body 10 is the same as the weld of the inspected component (inspected member). The material (such as stainless steel 304 or stainless steel 316), shape, heat treatment state and surface state of the test block body 10 and the inspected component (inspected member) are basically the same.

[0045] The test block body 10 has a first surface and a second surface opposite to each other, wherein the first surface is a plane, that is, the weld has been polished flat and has no weld excess height. Of course, both the first surface and the second surface can be planes.

[0046] The test block body 10 includes a first substrate 11 and a second substrate 12, the first substrate 11 and the second substrate 12 are welded and fixed, and a weld 13 is formed between the first substrate 11 and the second substrate 12. The first surface of the test block body 10 is provided with a plurality of defect structures, and the plurality of defect structures include a plurality of flat-bottom holes 20 and a plurality of grooves 30. The defect structures are non-transparent flat-bottom holes and grooves machined by nano EDM electric spark.

[0047] like Figure 1 As shown, in some embodiments, the plurality of flat-bottom holes 20 include a first flat-bottom hole 21, a second flat-bottom hole 22, and a third flat-bottom hole 23, and the line connecting the axes of the first flat-bottom hole 21, the second flat-bottom hole 22, and the third flat-bottom hole 23 may be perpendicular to the length direction of the weld 13.

[0048] The first flat-bottom hole 21 is located in the first substrate 11, the second flat-bottom hole 22 is located in the weld 13, half of the third flat-bottom hole 23 is located in the weld 13 and half of the third flat-bottom hole 23 is located in the second substrate 12, or part (such as one third) of the third flat-bottom hole 23 is located in the weld 13 and part (such as two thirds) of the third flat-bottom hole 23 is located in the second substrate 12.

[0049] like Figure 3 and Figure 5 As shown, the dimensions of the first flat bottom hole 21 , the second flat bottom hole 22 and the third flat bottom hole 23 are: a depth of 1 mm and a diameter of 3.2 mm.

[0050] like Figure 1 As shown, in some embodiments, the plurality of grooves 30 include a first groove 31, a second groove 32, and a third groove 33;

[0051] The first groove 31, the second groove 32 and the third groove 33 are inclined grooves, and the first groove 31, the second groove 32 and the third groove 33 are arranged at an acute angle with the length direction of the weld 13, and the first groove 31, the second groove 32 and the third groove 33 are all in the shape of long strips. The first groove 31 is located at the first substrate 11, the second groove 32 is located at the weld 13, half of the third groove 33 is located at the weld 13, and half of the third groove 33 is located at the second substrate 12. Alternatively, part (such as one third) of the third groove 33 is located at the weld 13, and part (such as two thirds) of the third groove 33 is located at the second substrate 12. Figure 3 and Figure 5As shown, the first groove 31 , the second groove 32 and the third groove 33 are arranged at 45° with respect to the length direction of the weld 13 .

[0052] like Figure 1 As shown, in some embodiments, the plurality of grooves 30 further include a fourth groove 34, a fifth groove 35 and a sixth groove 36. The fourth groove 34, the fifth groove 35 and the sixth groove 36 are all in the shape of long strips, and the length directions of the fourth groove 34, the fifth groove 35 and the sixth groove 36 are perpendicular to the length direction of the weld 13. The fourth groove 34 is located at the first substrate 11, the fifth groove 35 is located at the weld 13, half of the sixth groove 36 is located at the weld 13, and half of the sixth groove 36 is located at the second substrate 12, or part (such as one third) of the sixth groove 36 is located at the weld 13, and part (such as two thirds) of the sixth groove 36 is located at the second substrate 12.

[0053] like Figure 1 As shown, in some embodiments, the plurality of grooves 30 further include a seventh groove 37, an eighth groove 38 and a ninth groove 39; the seventh groove 37, the eighth groove 38 and the ninth groove 39 are all in the shape of long strips, and the length directions of the seventh groove 37, the eighth groove 38 and the ninth groove 39 are arranged parallel to the length direction of the weld 13, wherein the seventh groove 37 is located at the first substrate 11, the eighth groove 38 is located at the weld 13, half of the ninth groove 39 is located at the weld 13, and half of the ninth groove 39 is located at the second substrate 12, or, part (such as one third) of the ninth groove 39 is located at the weld 13, and part (such as two thirds) of the ninth groove 39 is located at the second substrate 12.

[0054] In some embodiments, the sizes of the first groove 31, the second groove 32, the third groove 33, the fourth groove 34, the fifth groove 35, the sixth groove 36, the seventh groove 37, the eighth groove 38 and the ninth groove 39 are all the same.

[0055] like Figure 3 and Figure 5 As shown, the dimensions of the first groove 31, the second groove 32, the third groove 33, the fourth groove 34, the fifth groove 35, the sixth groove 36, the seventh groove 37, the eighth groove 38 and the ninth groove 39 are all 4.8 mm in length, 0.25 mm in width and 1 mm in depth.

[0056] like Figure 1As shown, in some embodiments, the groove 30 also includes a tenth groove 310, which is in the shape of a long strip, and the length direction of the tenth groove 310 is perpendicular to the length direction of the weld 13, and the tenth groove 310 is located in the second substrate 12.

[0057] like Figure 3 As shown, the dimensions of the tenth groove 310 are: length 50 mm, width 0.25 mm, and depth 1 mm.

[0058] In some embodiments, Figure 1 As shown, the first flat-bottom hole 21, the first groove 31, the fourth groove 34 and the seventh groove 37 are all located in the first substrate 11, and the first flat-bottom hole 21, the first groove 31, the fourth groove 34 and the seventh groove 37 are sequentially spaced from the first end of the length direction of the first substrate 11 to the second end of the length direction of the first substrate 11, and the first groove 31 and the fourth groove 34 are located at the edge of the weld 13.

[0059] In some embodiments, Figure 1 As shown, the second flat-bottom hole 22, the second groove 32, the fifth groove 35 and the eighth groove 38 are located in the weld 13, and the second flat-bottom hole 22, the second groove 32, the fifth groove 35 and the eighth groove 38 are sequentially spaced from the first end of the weld 13 in the length direction to the second end of the weld 13 in the length direction.

[0060] In some embodiments, Figure 1 As shown, half of the third flat-bottom hole 23, the third groove 33, the sixth groove 36 and the ninth groove 39 are respectively located in the second substrate 12 and the weld 13, and the third flat-bottom hole 23, the third groove 33, the sixth groove 36 and the ninth groove 39 are sequentially spaced from the first end of the weld 13 in the length direction to the second end of the weld 13 in the length direction.

[0061] It can be understood that the stainless steel weld standard sample block has various types of defect structures (including the shape and direction of the defect structure), including flat-bottom holes and inclined grooves, transverse grooves and longitudinal grooves, etc., which can be used to verify the parameter settings of the detection instrument, ensure the accuracy of the detection instrument, and improve the reliability of the detection instrument in identifying weld defects, so that the detection instrument can adjust the parameter settings of the detection instrument according to different workpieces and weld defect types, thereby improving the accuracy and applicability of the detection instrument.

[0062] like Figure 6 As shown, the present application also discloses a stainless steel weld defect eddy current array detection process (stainless steel weld defect eddy current array detection method), comprising the following steps:

[0063] S1: preparing a stainless steel weld standard sample test block, wherein the stainless steel weld standard sample test block is the stainless steel weld standard sample test block of the above embodiment;

[0064] Step S2: Select an eddy current array probe and adjust a detection instrument, which includes but is not limited to an eddy current instrument;

[0065] Step S3: setting parameters of the detection instrument, including but not limited to excitation mode, gain, detection frequency, axial-lateral fusion detection (lateral detection or axial detection), encoder sampling, sampling rate, measurement mode (coil independence, amplitude calibration, etc.), C-scan imaging, filter setting, etc.;

[0066] Step S4: the testing instrument performs verification testing on the stainless steel weld standard sample block to obtain verification test results;

[0067] Step S5: Determine whether the verification test result meets the requirements. If the verification test result does not meet the requirements, repeat steps S2 to S4 or repeat steps S3 to S4 until the verification test result meets the requirements. If the verification test result meets the requirements, execute step S6.

[0068] Step S6: The testing instrument tests the on-site components (tested parts / tested components).

[0069] In some embodiments, in step S1, the material (e.g., stainless steel 304 or stainless steel 316, etc.), shape (e.g., square, etc.), heat treatment state and surface state of the stainless steel weld standard test block are basically consistent with the inspected component (inspected component) to ensure the comparability and accuracy of the test results.

[0070] In some embodiments, in step S2, selecting an eddy current array probe includes: selecting a flexible eddy current array probe with 30 axial coils and 14 transverse coils. An eddy current array probe of appropriate specifications can be selected according to the verification test result.

[0071] In some embodiments, in step S3, the parameters of the detection instrument are set, including: setting the gain to 40dB, axial and lateral fusion, encoder sampling rate to 1 / mm, maximum speed not exceeding 600mm / s, amplitude calibration, excitation frequency to 1MHz, excitation voltage to 9.5V, and median filtering.

[0072] In some embodiments, in step S4, the verification test performed by the testing instrument on the stainless steel weld standard test block may include a balance calibration.

[0073] like Figure 7 As shown in FIG. 1 , it is an axial test result diagram along the weld 13 direction of the stainless steel weld standard sample block, as shown in FIG. Figure 8As shown, it is a diagram of the axial-transverse fusion detection result along the weld 13 direction of the stainless steel weld standard sample test block. From the axial detection result and the axial-transverse fusion detection result, it can be seen that the axial detection missed the fourth groove 34, the fifth groove 35 and the sixth groove 36. The axial-transverse fusion detection result is better, and the axial-transverse fusion detection method can be used to detect the on-site components.

[0074] It can be understood that the eddy current array detection process for stainless steel weld defects can effectively simulate the defects of welds of larger pipe diameters (greater than DN50) or planar components being detected, and can be effectively used to set the inspection sensitivity, eddy current instrument scanning mode, excitation frequency and evaluate the defect conditions; the array eddy current detection process is to set the relevant parameters of the eddy current instrument, adjust the detection sensitivity of the eddy current detector, determine the acceptance level, ensure the accuracy of the detection results, and judge and compare the nature of defects in the welds of specific components being inspected.

[0075] It can be understood that by adopting the eddy current array detection process for stainless steel weld defects and verifying the stainless steel weld standard sample block (as a standard test block), the accuracy of the detection instrument is ensured, and the reliability of the detection instrument in identifying weld defects is improved, so that the detection instrument can adjust the parameter settings of the detection instrument according to different workpieces and weld defect types, thereby improving the accuracy and applicability of the detection instrument.

[0076] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A stainless steel weld standard test block, characterized in that: The test block body (10) comprises a test block body (10), wherein the test block body (10) has a first surface and a second surface opposite to each other, and the first surface is a plane; The test block body (10) comprises a first substrate (11) and a second substrate (12), the first substrate (11) and the second substrate (12) are welded and fixed, and a weld (13) is formed between the first substrate (11) and the second substrate (12); a first surface of the test block body (10) is provided with a plurality of defect structures, and the plurality of defect structures include a plurality of flat-bottom holes (20) and a plurality of grooves (30).

2. The stainless steel weld standard test block according to claim 1, characterized in that: The plurality of flat bottom holes (20) include a first flat bottom hole (21), a second flat bottom hole (22), and a third flat bottom hole (23); The first flat-bottom hole (21) is located on the first substrate (11), the second flat-bottom hole (22) is located on the welding seam (13), half of the third flat-bottom hole (23) is located on the welding seam (13), and half of the third flat-bottom hole (23) is located on the second substrate (12).

3. The stainless steel weld standard test block according to claim 2, characterized in that: The dimensions of the first flat-bottom hole (21), the second flat-bottom hole (22) and the third flat-bottom hole (23) are: depth 1 mm and diameter 3.2 mm.

4. The stainless steel weld standard test block according to claim 1, characterized in that: The plurality of grooves (30) include a first groove (31), a second groove (32), and a third groove (33); The first groove (31), the second groove (32) and the third groove (33) are inclined grooves, the first groove (31), the second groove (32) and the third groove (33) are arranged at an acute angle with the length direction of the welding seam (13), and the first groove (31), the second groove (32) and the third groove (33) are all in the shape of long strips; The first groove (31) is located on the first substrate (11), the second groove (32) is located on the welding seam (13), half of the third groove (33) is located on the welding seam (13), and half of the third groove (33) is located on the second substrate (12).

5. The stainless steel weld standard test block according to claim 4, characterized in that: The first groove (31), the second groove (32) and the third groove (33) are arranged at an angle of 45° to the length direction of the welding seam (13).

6. The stainless steel weld standard test block according to claim 5, characterized in that: The plurality of grooves (30) further include a fourth groove (34), a fifth groove (35) and a sixth groove (36); the fourth groove (34), the fifth groove (35) and the sixth groove (36) are all in the shape of long strips, and the length directions of the fourth groove (34), the fifth groove (35) and the sixth groove (36) are perpendicular to the length direction of the weld (13); The fourth groove (34) is located on the first substrate (11), the fifth groove (35) is located on the welding seam (13), half of the sixth groove (36) is located on the welding seam (13), and half of the sixth groove (36) is located on the second substrate (12).

7. The stainless steel weld standard test block according to claim 6, characterized in that: The plurality of grooves (30) further include a seventh groove (37), an eighth groove (38) and a ninth groove (39); the seventh groove (37), the eighth groove (38) and the ninth groove (39) are all in the shape of long strips, and the length directions of the seventh groove (37), the eighth groove (38) and the ninth groove (39) are arranged parallel to the length direction of the welding seam (13); The seventh groove (37) is located on the first substrate (11), the eighth groove (38) is located on the welding seam (13), half of the ninth groove (39) is located on the welding seam (13), and half of the ninth groove (39) is located on the second substrate (12).

8. The stainless steel weld standard test block according to claim 7, characterized in that: The sizes of the first groove (31), the second groove (32), the third groove (33), the fourth groove (34), the fifth groove (35), the sixth groove (36), the seventh groove (37), the eighth groove (38) and the ninth groove (39) are all the same.

9. The stainless steel weld standard test block according to claim 8, characterized in that: The dimensions of the first groove (31), the second groove (32), the third groove (33), the fourth groove (34), the fifth groove (35), the sixth groove (36), the seventh groove (37), the eighth groove (38) and the ninth groove (39) are all 4.8 mm in length, 0.25 mm in width and 1 mm in depth.

10. The stainless steel weld standard test block according to claim 1, characterized in that: The groove (30) further comprises a tenth groove (310), the tenth groove (310) is in the shape of an elongated strip, the length direction of the tenth groove (310) is perpendicular to the length direction of the welding seam (13), and the tenth groove (310) is located in the second substrate (12).

11. The stainless steel weld standard test block according to claim 10, characterized in that: The dimensions of the tenth notch (310) are: length 50 mm, width 0.25 mm, and depth 1 mm.

12. A stainless steel weld defect eddy current array detection process, characterized in that: The following steps are involved: S1: preparing a stainless steel weld standard sample block, wherein the stainless steel weld standard sample block is the stainless steel weld standard sample block according to any one of claims 1 to 11; Step S2: Select an eddy current array probe and calibrate the detection instrument; Step S3: setting parameters of the detection instrument; Step S4: the testing instrument performs verification testing on the stainless steel weld standard test block to obtain verification test results; Step S5: Determine whether the verification test result meets the requirements. If the verification test result does not meet the requirements, repeat steps S2 to S4 or repeat steps S3 to S4 until the verification test result meets the requirements. If the verification test result meets the requirements, execute step S6. Step S6: The detection instrument detects the on-site components.

13. The eddy current array detection process for stainless steel weld defects according to claim 12, characterized in that: In step S2, selecting an eddy current array probe includes: selecting a flexible eddy current array probe with 30 axial coils and 14 transverse coils.

14. The eddy current array detection process for stainless steel weld defects according to claim 12, characterized in that: In step S3, the parameters of the detection instrument are set, including: setting the gain to 40 dB, axial and lateral fusion, encoder sampling rate to 1 / mm, maximum speed not exceeding 600 mm / s, amplitude calibration, excitation frequency to 1 MHz, excitation voltage to 9.5 volts, and median filtering.

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