Eddy current detection test block for inertia friction welding assembly and preparation method of eddy current detection test block

Abstract

The invention relates to an eddy current test block for an inertia friction welding assembly and a preparation method of the eddy current test block, the eddy current test block comprises an annular test block, and a first notch groove group, a second notch groove group and a third notch groove group on the annular test block, the first notch groove group comprises a first vertical notch groove and a first parallel notch groove; the second notch groove group comprises a plurality of second parallel notch grooves which are respectively formed in the inner circular surface and the outer circular surface and are parallel to the weld joint surface; the third notch groove group comprises a plurality of notch groove pair groups, each notch groove pair group comprises a plurality of third vertical notch groove pairs and third parallel notch groove pairs, the circumferential distances between the third vertical notch groove pairs arranged on the inner circular surface and the outer circular surface are different, and / or the circumferential distances between the third parallel notch groove pairs arranged on the inner circular surface and the outer circular surface are different. According to the method, the defect equivalent of the inertia friction welding assembly with curvature can be accurately and comprehensively evaluated, and misjudgment and missed judgment of defects are avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of eddy current testing, and particularly to an eddy current testing block for an inertia friction welding assembly and a preparation method thereof. Background Art

[0002] Modern civil aviation engines not only require relatively high cycle parameters but also need to pass airworthiness certification, thus posing very stringent requirements on the service life, safety, and reliability of their components. Among various engine parts, disk-shaft parts bear relatively harsh loads, and once they fail unexpectedly, catastrophic consequences will occur. Therefore, compared with other parts, the safety and reliability requirements for key disk-shaft components are more stringent, and the reliability of their detection has always been one of the key concerns of each aviation engine company.

[0003] Compared with a disk-drum / disk-shaft assembly connected by bolts, welding has obvious weight reduction advantages. As a solid-phase welding method, inertia friction welding has advantages such as good welding joint quality, high dimensional accuracy, and wide application range compared with electron beam welding. It is the most suitable welding process for rotating components of aviation engines and is one of the important measures to ensure the performance of commercial aviation engines.

[0004] When welding defects such as cracks, weak connections, intermetallic compounds, and misalignment occur in an inertia friction welding assembly of an aviation engine (such as a disk-drum / disk-shaft assembly) due to a small weld thickness, poor matching between the weldability of the material and the weldability of the welding process, or improper control during the welding process, it may affect the quality of the welding joint. In particular, surface and subsurface defects are more likely to cause crack initiation and propagation. Eddy current testing can detect surface and subsurface defects of the friction welding assembly, and the testing effect is not affected by the defect direction. Therefore, it is an important method for detecting the quality of inertia friction welding joints.

[0005] Due to the relatively complex external shape structure and organizational structure of the inertia friction welding assembly, and usually relatively stringent acceptance requirements, the flat grooved test blocks used in conventional eddy current testing are difficult to fully simulate the actual situation on the inertia friction welding assembly, so they are not applicable. Summary of the Invention

[0006] To overcome the problems existing in the related art, the present disclosure provides an eddy current testing block for an inertia friction welding assembly and a preparation method thereof, which can fully simulate the actual situation on the inertia friction welding assembly, so as to accurately make an eddy current testing evaluation.

[0007] The present disclosure provides an eddy current test block for an inertia friction welding assembly, including: an annular test block, and a first groove group, a second groove group and a third groove group provided on the annular test block, wherein the first groove group, the second groove group and the third groove group are circumferentially distributed along the annular test block; the annular test block includes an inner circular surface, an outer circular surface and a weld surface; the first groove group includes a first vertical groove respectively provided on the inner circular surface and the outer circular surface and perpendicular to the weld surface, and a first parallel groove respectively provided on the inner circular surface and the outer circular surface and parallel to the weld surface, and the first vertical groove and the first parallel groove are circumferentially distributed along the annular test block; the second groove group includes a plurality of second parallel grooves respectively provided on the inner circular surface and the outer circular surface and parallel to the weld surface, and the plurality of second parallel grooves are distributed along the circumferential and axial directions of the annular test block; the third groove group includes a plurality of groove pair groups, each groove pair group includes a plurality of third vertical groove pairs respectively provided on the inner circular surface and the outer circular surface and perpendicular to the weld surface, and a third parallel groove pair respectively provided on the inner circular surface and the outer circular surface and parallel to the weld surface, and the plurality of third vertical groove pairs and the plurality of third parallel groove pairs are circumferentially distributed along the annular test block, wherein the circumferential pitch between each of the third vertical groove pairs provided on the inner circular surface and the outer circular surface is different, and / or, the circumferential pitch between each of the third parallel groove pairs provided on the inner circular surface and the outer circular surface is different.

[0008] In some embodiments, the axial pitch between two adjacent second parallel grooves is between 0.2 mm and 0.5 mm.

[0009] In some embodiments, the circumferential pitch between two adjacent second parallel grooves is greater than or equal to 3 times the diameter of the eddy current detector probe.

[0010] In some embodiments, the minimum circumferential pitch between each of the third vertical groove pairs is between 0.1 mm and 0.6 mm, and the maximum circumferential pitch is between 2 / 3 and 1 times the diameter of the eddy current detector probe; and / or, the minimum circumferential pitch between each of the third parallel groove pairs is between 0.1 mm and 0.6 mm, and the maximum circumferential pitch is between 2 / 3 and 1 times the diameter of the eddy current detector probe.

[0011] In some embodiments, the circumferential pitch between two adjacent third vertical groove pairs is greater than or equal to 3 times the diameter of the eddy current detector probe; and / or, the circumferential pitch between two adjacent third parallel groove pairs is greater than or equal to 3 times the diameter of the eddy current detector probe.

[0012] In some embodiments, the annular test block includes a clamping surface axially opposite to the weld surface, and the axial distance between the clamping surface and the weld surface is greater than or equal to 20 mm.

[0013] In some embodiments, the lengths of the first vertical groove, the first parallel groove, the second parallel groove, the third vertical groove, and the third parallel groove are less than or equal to 0.8 mm, the widths are less than or equal to 0.1 mm, and the depths are less than or equal to 0.4 mm.

[0014] In some embodiments, two annular test blocks are provided. One of the two annular test blocks is made of GH4169 nickel-based superalloy, and the other is made of GH4065A nickel-based superalloy.

[0015] In some embodiments, the first groove group is distributed in a first area in the circumferential direction of the annular test block, the second groove group is distributed in a second area in the circumferential direction of the annular test block, and the third groove group is distributed in a third area in the circumferential direction of the annular test block. Among them, the angular ranges of the first area, the second area, and the third area are circumferentially staggered.

[0016] In some embodiments, the first area is an angular range from 0° to 90° in the clockwise direction of the circumference of the annular test block, where 0° points directly upward, the second area is an angular range from 90° to 180° in the clockwise direction of the circumference of the annular test block, and the third area is an angular range from 180° to 360° in the clockwise direction of the circumference of the annular test block.

[0017] The present disclosure also provides a preparation method for an eddy current detection test block for an inertia friction welding assembly, which is used to prepare the eddy current detection test block as described above; the preparation method includes: machining the outer shape of the annular test block so that the size of the weld joint of the annular test block is the same as the size of the weld joint of the workpiece to be detected, where the material of the annular test block is the same as the material of the workpiece to be detected; performing a grooving process on the machined annular test block so that the first groove group for sensitivity calibration, the second groove group for verifying the coverage range of the eddy current detector probe, and the third groove group for verifying the resolution of the eddy current detector probe are formed on the annular test block.

[0018] In some embodiments, before machining the outer shape of the annular test block, the preparation method further includes: determining the size of the annular test block, where the size of the annular test block includes diameter, thickness, and axial length; determining the material and welding process of the annular test block, where the welding process is the same as the welding process of the workpiece to be detected; determining the groove sizes and positions of the first groove group, the second groove group, and the third groove group on the annular test block.

[0019] In some embodiments, before grooving the processed annular test block, the preparation method further includes: determining the weld position of the annular test block by using a light etching method.

[0020] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0021] By providing different grooves at different circumferential positions of the annular test block, namely the first groove group, the second groove group, and the third groove group, the present disclosure can verify the scanning sensitivity of the eddy current detector, the coverage range of the eddy current detector probe, and the resolution of the eddy current detector probe, so as to comprehensively and accurately evaluate the inertia friction welding assembly with curvature.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0024] Figure 1 is a schematic diagram of an eddy current detection test block for an inertia friction welding assembly shown according to an exemplary embodiment;

[0025] Figure 2 is a side view of an eddy current detection test block for an inertia friction welding assembly shown according to an exemplary embodiment;

[0026] Figure 3 is a developed schematic diagram of an eddy current detection test block for an inertia friction welding assembly shown according to an exemplary embodiment;

[0027] Figure 4 is another developed schematic diagram of an eddy current detection test block for an inertia friction welding assembly shown according to an exemplary embodiment;

[0028] Figure 5 is a flowchart of a preparation method for an eddy current detection test block for an inertia friction welding assembly shown according to an exemplary embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0030] Referring to Figures 1-4 , the present disclosure provides an eddy current test block for an inertia friction welding assembly, which can simulate a friction welding assembly with a curved surface and can verify the dynamic scanning sensitivity, scanning range, and scanning resolution of eddy current inspection.

[0031] Eddy current inspection refers to when a coil carrying an alternating current approaches a metal conductor to be inspected, due to the action of electromagnetic induction, a vortex current, i.e., an eddy current, will be induced in the conductor. At the same time, this eddy current will also generate a magnetic field, and the eddy current magnetic field will affect the magnetic field of the inspection coil, thereby causing changes in the voltage and impedance of the conductor to the coil. Defects on the surface and near the surface of the conductor will affect the intensity and distribution of the eddy current, and the change of the eddy current will in turn affect the change of the voltage and impedance of the inspection coil. The presence of defects in the conductor can be inferred based on these changes. The method of using the change of the eddy current signal to detect defects is eddy current inspection.

[0032] A test block, also known as a reference standard, is a sample block with known fixed characteristics of a simple geometric shape artificial reflector or simulated defect. It usually has specified material, surface condition, geometric shape, and dimensions, and can be used for setting and calibration of eddy current inspection equipment, defect assessment, etc.

[0033] The eddy current test block of the present disclosure may include an annular test block 10, and a first groove group 11, a second groove group 12, and a third groove group 13 provided on the annular test block 10. The first groove group 11, the second groove group 12, and the third groove group 13 are distributed along the circumferential direction C of the annular test block. The annular test block 10 may include an inner circular surface 101, an outer circular surface 102, and a weld surface 103. The first groove group 11 may include first vertical grooves 111 respectively provided on the inner circular surface 101 and the outer circular surface 102 and perpendicular to the weld surface 103, and first parallel grooves 112 respectively provided on the inner circular surface 101 and the outer circular surface 102 and parallel to the weld surface 103. The first vertical grooves 111 and the first parallel grooves 112 are distributed along the circumferential direction of the annular test block 10. The second groove group 12 may include a plurality of second parallel grooves 121 respectively provided on the inner circular surface 101 and the outer circular surface 102 and parallel to the weld surface 103. The plurality of second parallel grooves 121 are distributed along the circumferential direction C and the axial direction of the annular test block 10. The third groove group 13 may include a plurality of groove pair groups. Each groove pair group may include a plurality of third vertical groove pairs 131 respectively provided on the inner circular surface 101 and the outer circular surface 102 and perpendicular to the weld surface 103, and third parallel groove pairs 132 respectively provided on the inner circular surface 101 and the outer circular surface 102 and parallel to the weld surface 103. The plurality of third vertical groove pairs 131 and the plurality of third parallel groove pairs 132 are distributed along the circumferential direction of the annular test block 10. Among them, the circumferential pitch between each pair of third vertical grooves 131 provided on the inner circular surface 101 and the outer circular surface 102 is different, and / or the circumferential pitch of each pair of third parallel grooves 132 provided on the inner circular surface 101 and the outer circular surface 102 is different.

[0034] The annular test block 10 may have a curved surface profile and can be used to simulate the real situation after welding of an inertia friction welding component with a curved surface. The inertia friction welding component may be, for example, a component with a curved surface such as a disk-drum / disk-shaft assembly of an aeroengine. The annular test block 10 may be an annular hollow structure with a certain thickness and may include an inner circular surface 101, an outer circular surface 102, and a weld surface 103 that is substantially perpendicular to the inner circular surface 101 and the outer circular surface 102.

[0035] The first groove group 11 can be used for eddy current detection sensitivity calibration. The second groove group 12 can be used to verify the probe coverage range of the eddy current detector. The third groove group 13 can be used to verify the probe resolution of the eddy current detector.

[0036] As Figure 2As shown, the first grooving group 11 may include first vertical grooves 111 respectively disposed on the inner circular surface 101 and the outer circular surface 102 and perpendicular to the weld surface 103, and first parallel grooves 112 respectively disposed on the inner circular surface 101 and the outer circular surface 102 and parallel to the weld surface 103. It can be referred to that on the inner circular surface 101 of the annular test block 10, the first vertical groove 111 perpendicular to the weld surface 103 and the first parallel groove 112 parallel to the weld surface 103 are respectively engraved, and on the outer circular surface 102 of the annular test block 10, the first vertical groove 111 perpendicular to the weld surface 103 and the first parallel groove 112 parallel to the weld surface 103 are respectively engraved. That is, both the inner circular surface 101 and the outer circular surface 102 of the annular test block 10 include vertical grooves and parallel grooves perpendicular to the weld surface 103. It can be understood that these grooves are located in the heat-affected zone adjacent to the weld.

[0037] The circumferential distribution of the first vertical grooves 111 and the first parallel grooves 112 along the annular test block 10 can refer to that the first vertical grooves 111, the first parallel grooves 112 on the inner circular surface 101, and the first vertical grooves 111, the first parallel grooves 112 on the outer circular surface 102 are circumferentially spaced along the annular circumference of the annular test block 10.

[0038] Exemplarily, as Figure 2 shown, the first vertical grooves 111 on the inner circular surface 101, the first vertical grooves 111 on the outer circular surface 102, the first parallel grooves 112 on the inner circular surface 101, and the first parallel grooves 112 on the outer circular surface 102 can be distributed clockwise in the circumferential direction along the first region of the annular test block 10, for example, they can be evenly distributed at equal intervals. The first region of the annular test block 10 can be the region from 0° to 90° in the clockwise direction of the circumference of the annular test block 10, where 0° points directly above the illustration.

[0039] The second grooving group 12 may include a plurality of second parallel grooves 121 respectively disposed on the inner circular surface 101 and the outer circular surface 102 and parallel to the weld surface 103. It can be referred to that a plurality of second parallel grooves 121 are engraved on the inner circular surface 101, and a plurality of second parallel grooves 121 are also engraved on the outer circular surface 102.

[0040] The circumferential and axial distribution of the plurality of second parallel grooves 121 along the annular test block 10 can be that the plurality of second parallel grooves 121 on the inner circular surface 101 are circumferentially spaced along the annular test block 10, and at the same time, the plurality of second parallel grooves 121 on the inner circular surface 101 are axially spaced. The plurality of second parallel grooves 121 on the outer circular surface 102 are circumferentially spaced along the annular test block 10, and at the same time, the plurality of second parallel grooves 121 on the outer circular surface 102 are axially spaced along the annular test block 10.

[0041] Exemplarily, as Figure 2and Figure 3 As shown, 15 second parallel grooves 121 can be engraved on the inner circular surface 101 and the outer circular surface 102 of the second region of the annular test block 10. For example, the second parallel groove 121 is located clockwise and axially offset behind the first parallel groove 121. The axial offset can be, for example, that the second parallel groove 121 is located axially L behind the first parallel groove 121 (in the direction of the arrow shown in the figure), and the third parallel groove 121 is located clockwise and axially offset behind the second selected groove 121, and so on. Among them, the second region of the annular test block 10 can be the region from 90° to 180° in the clockwise direction of the circumference of the annular test block 10.

[0042] As Figure 2 and Figure 4 As shown, the third groove group 13 can include multiple groove pair groups. Each groove pair group includes multiple third vertical groove pairs 131 respectively arranged on the inner circular surface 101 and the outer circular surface 102 and perpendicular to the weld surface 103, and third parallel groove pairs 132 respectively arranged on the inner circular surface 101 and the outer circular surface 102 and parallel to the weld surface 103. That is, multiple third vertical groove pairs 131 perpendicular to the weld surface 103 are engraved on the inner circular surface 101, multiple third vertical groove pairs 131 perpendicular to the weld surface 103 are engraved on the outer circular surface 102, multiple third parallel groove pairs 132 parallel to the weld surface 103 are engraved on the inner circular surface 101, and multiple third parallel groove pairs 132 parallel to the weld surface 103 are engraved on the outer circular surface 102. That is, there are both vertical grooves and parallel grooves on the inner circular surface 101, and there are both vertical grooves and parallel grooves on the outer circular surface 102. Among them, "groove pair" can refer to that two grooves form a groove pair. For example, the third vertical groove pair 131 can be that two third vertical grooves are combined into a third vertical groove pair 131.

[0043] Multiple third vertical groove pairs 131 and multiple third parallel groove pairs 132 can be distributed along the circumferential direction of the annular test block 10. It can be referred to that there are multiple third vertical groove pairs 131 distributed along the circumferential direction C on the inner circular surface 101, multiple third vertical groove pairs 131 distributed along the circumferential direction C on the outer circular surface 102, multiple third parallel groove pairs 132 distributed along the circumferential direction C on the inner circular surface 101, and multiple third parallel groove pairs 132 distributed along the circumferential direction C on the inner circular surface 101. And, multiple third vertical groove pairs 131 on the inner circular surface 101 and multiple third vertical groove pairs 131 on the outer circular surface 101 are combined into a groove pair group, multiple third parallel groove pairs 132 on the inner circular surface 101 and the third parallel groove pairs 132 on the outer circular surface 101 are combined into a groove pair group, and multiple groove pair groups are distributed along the circumferential direction C.

[0044] As Figure 4As shown, the circumferential spacing between each pair of third vertical grooves 131 provided on the inner circular surface 101 and the outer circular surface 102 is different. It can be meant that the circumferential spacing between the two grooves in each pair of third vertical grooves 131 on the inner circular surface 101 is different, and the circumferential spacing between the two grooves in each pair of third vertical grooves 131 on the outer circular surface 102 is different.

[0045] The circumferential spacing of each pair of third parallel grooves 132 provided on the inner circular surface 101 and the outer circular surface 102 can be different. It can be meant that the circumferential spacing between the two grooves in each pair of third parallel grooves 132 on the inner circular surface 101 is different, and the circumferential spacing between the two grooves in each pair of third parallel grooves 132 on the outer circular surface 102 is different.

[0046] Exemplarily, as Figure 4 shown, in the third region of the annular test block 10, a plurality of pairs of third vertical grooves 131 on the inner circular surface 101, a plurality of pairs of third vertical grooves 131 on the outer circular surface 102, a plurality of pairs of third parallel grooves 132 on the inner circular surface 101, and a plurality of pairs of third parallel grooves 132 on the outer circular surface 102 are sequentially arranged in the clockwise direction. Among them, the third region can be the region from 180° to 360° in the clockwise direction of the circumference of the annular test block 10.

[0047] The present disclosure sets different grooves, namely the first groove group, the second groove group, and the third groove group, at different circumferential positions of the annular test block, so as to verify the scanning sensitivity of the eddy current detector, the coverage range of the eddy current detector probe, and the resolution of the eddy current detector probe, enabling a comprehensive and accurate evaluation of the inertia friction welding assembly with curvature.

[0048] In some embodiments, two annular test blocks 10 can be provided. One of the two annular test blocks 10 can be made of GH4169 nickel-based superalloy, and the other can be made of GH4065A nickel-based superalloy. The above materials are the same as those of the inertia friction welding assembly of the aeroengine disk-drum / disk-shaft type, and can conduct a real evaluation for the inertia friction welding assembly of the aeroengine disk-drum / disk-shaft type.

[0049] In some embodiments, the lengths of the first vertical groove 111, the first parallel groove 112, the second parallel groove 121, the third vertical groove 131, and the third parallel groove 132 can be less than or equal to 0.8 mm, the widths can be less than or equal to 0.1 mm, and the depths can be less than or equal to 0.4 mm. For example, the length dimension can be 0.76 mm, the depth dimension can be 0.38 mm, and the width dimension can be 0.08 mm. The shapes of the above grooves can be rectangular grooves or U-shaped grooves.

[0050] The larger the length, width, and depth dimensions of the above-mentioned grooves are, the easier it is to detect defects. However, it occupies a large space in the annular test block, has a small number of grooves, and a small detection range. The smaller the length, width, and depth dimensions of the above-mentioned grooves are, the more difficult it is to detect them. Correspondingly, the higher the accuracy of the eddy current detector probe needs to be detected. In other words, the more capable it is to detect whether the probe meets higher accuracy requirements. Therefore, the present disclosure limits the length, width, and depth dimensions of the above-mentioned grooves within the above range, which can meet the detection range requirements and can detect probes with higher accuracy requirements.

[0051] In some embodiments, such as Figure 3 shown, the axial spacing between two adjacent second parallel grooves 121 can be between 0.2 mm and 0.5 mm. For the numerical ranges described in the present disclosure, the numerical endpoint values and any values within the range can be included. In some embodiments, the axial spacing between two adjacent second parallel grooves 121 can be 0.3 mm.

[0052] If the above axial spacing is too large, it occupies space, the number of grooves decreases, and the detection range is small. If the axial spacing is too small, the detection accuracy requirement is high. Therefore, the present disclosure limits the above axial spacing within this range, which can not only meet the detection range requirements but also meet the probe accuracy requirements.

[0053] In some embodiments, such as Figure 4 shown, the minimum circumferential spacing between each pair of third vertical grooves 131 can be between 0.1 mm and 0.6 mm, and the maximum circumferential spacing can be 2 / 3 to 1 times the diameter of the eddy current detector probe. Among them, the minimum circumferential spacing and the maximum circumferential spacing of the vertical groove pair are calculated based on the distance between the centerlines of the widths of the two grooves.

[0054] Exemplarily, in the circumferential direction of the annular test block 10, the circumferential spacing between each pair of third vertical grooves 131 gradually increases. For example, there can be 10 pairs of third vertical grooves 131. In the circumferential direction of the annular test block 10, the circumferential spacing between each pair of third vertical grooves 131 can be 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, and 4 mm in sequence.

[0055] Such as Figure 4 shown, the minimum circumferential spacing between each pair of third parallel grooves 132 can be between 0.1 mm and 0.6 mm, and the maximum circumferential spacing is 2 / 3 to 1 times the diameter of the eddy current detector probe. Among them, the distance between the two grooves of the parallel groove pair is the distance between the ends of two adjacent grooves.

[0056] Exemplarily, in the circumferential direction of the annular test block 10, the circumferential spacing between each pair of third parallel grooves 132 gradually increases. For example, there may be 10 pairs of third parallel grooves 132. In the circumferential direction of the annular test block 10, the circumferential spacings between each pair of third parallel grooves 132 are 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, and 4 mm in sequence.

[0057] If the minimum circumferential spacing is too large, it occupies space, the number of grooves decreases, and the detection range is small; if the minimum circumferential spacing is too small, it is not easy to distinguish, and the precision requirement is high. Therefore, the present disclosure limits the above-mentioned maximum circumferential spacing and minimum circumferential spacing within this range, which can not only meet the detection range requirements but also meet the precision requirements.

[0058] In some embodiments, the circumferential spacing between two adjacent pairs of third vertical grooves 131 may be greater than or equal to 3 times the diameter of the probe of the eddy current detector; and / or, the circumferential spacing between two adjacent pairs of third parallel grooves 132 may be greater than or equal to 3 times the diameter of the probe of the eddy current detector.

[0059] If the circumferential spacing is too large, it occupies space, the number of grooves decreases, and the detection range is small; if the circumferential spacing is too small, there is interference between adjacent groups. Therefore, the present disclosure limits the above-mentioned circumferential spacing within this range, which can not only meet the detection range requirements but also avoid mutual interference.

[0060] In some embodiments, the annular test block 10 may include a clamping surface 104 opposite to the weld surface 103 in the axial direction, and the axial distance between the clamping surface 104 and the weld surface 103 may be greater than or equal to 20 mm. This can prevent the eddy current detection equipment from affecting the scanning range when clamping the annular test block 10.

[0061] The present disclosure also provides a method for preparing an eddy current detection test block for an inertia friction welding assembly, as Figure 5 shown, for preparing the eddy current detection test block mentioned above; the preparation method may include: step S11 and step S12.

[0062] Step S11: Machine the outer shape of the annular test block so that the size of the weld joint of the annular test block is the same as that of the weld joint of the workpiece to be detected, wherein the material of the annular test block is the same as that of the workpiece to be detected.

[0063] Using the same material as the workpiece to be detected, machine the pre-weld structure, wherein the pre-weld structure has the same diameter and thickness as the pre-weld of the workpiece to be detected.

[0064] Step S12: Groove the processed annular test block to form a first groove group for sensitivity calibration, a second groove group for verifying the coverage range of the eddy current detector probe, and a third groove group for verifying the resolution of the eddy current detector probe on the annular test block.

[0065] Use electric discharge machining, mechanical, laser or other methods to groove, with the maximum tolerance of the groove size being ±10%; use methods such as replication, feeler gauge, microscope measurement, test piece dissection, etc. to measure the groove size. If the requirements are not met, re-groove. After the measurement is qualified, mark the welding comparison ring number and the base material materials on both sides by vibration, steel stamping, electric discharge machining, etc.

[0066] By separately arranging the first groove group, the second groove group and the third groove group at different circumferential positions on the annular test block, the present disclosure can verify the scanning sensitivity of the eddy current detector, verify the coverage range of the eddy current detector probe, and verify the resolution of the eddy current detector probe, and can accurately and comprehensively evaluate the defect equivalent of the inertia friction welding assembly with curvature, avoiding misjudgment and omission of defects.

[0067] In some embodiments, before machining the outer shape of the annular test block, the preparation method may further include:

[0068] Determine the size of the annular test block, where the size of the annular test block includes diameter, thickness and axial length.

[0069] According to the outer shape structure of the weld area to be inspected of the disk-drum / disk-shaft assembly, determine the diameter, thickness and axial length of the eddy current detection annular test block. The diameter and thickness of the annular test block should be the same as the diameter, thickness and local outer contour of the area to be inspected; to ensure that the clamping of the eddy current detection equipment does not affect the scanning process, the distance from the end face of the clamping section to the weld should be greater than or equal to 20 mm.

[0070] Determine the material and welding process of the annular test block, where the welding process is the same as that of the part to be detected.

[0071] The material and welding process of the annular test block should be consistent with the material selection and welding process of the weld joint to be inspected.

[0072] Determine the groove size and position of the first groove group, the second groove group and the third groove group on the annular test block.

[0073] According to the standard requirements or acceptance requirements, determine the groove requirements for sensitivity calibration required for eddy current detection. The detection sensitivity setting should be less than or equal to the minimum rejection defect size. The grooves should be located on the weld and distributed on the inner and outer circular surfaces of the weld, and both should include grooves parallel to and perpendicular to the weld.

[0074] The welded ring specimen is rough machined after welding by mechanical machining methods. After machining, the fluorescence detection method is used to confirm that the flash is removed completely. At this time, the machining allowance on one side should be ≥0.5 mm;

[0075] The ring specimen is heat treated after welding using the same heat treatment system as the part to be inspected, and then machined to have the same local structure as the area to be inspected of the part to be inspected. The surface finish of the machined surface should be Ra0.8 μm or better.

[0076] It can be further understood that in the present disclosure, "a plurality of" means two or more, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "the", and "said" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0077] It can be further understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or degree of importance. In fact, the expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0078] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring these operations to be performed in the specific order or serial order shown, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be beneficial.

[0079] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0080] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. An eddy current test block for inertia friction welding components, in, include: An annular test block and a first groove group, a second groove group and a third groove group arranged on the annular test block, wherein the first groove group, the second groove group and the third groove group are distributed along the circumference of the annular test block, and the annular test block comprises an inner circular surface, an outer circular surface and a weld surface; The first groove group includes first vertical grooves respectively arranged on the inner circular surface and the outer circular surface and respectively perpendicular to the weld surface, and first parallel grooves respectively arranged on the inner circular surface and the outer circular surface and respectively parallel to the weld surface, and the first vertical grooves and the first parallel grooves are distributed along the circumference of the annular test block; The second groove group includes a plurality of second parallel grooves respectively arranged on the inner cylindrical surface and the outer cylindrical surface and parallel to the weld surface, and the plurality of second parallel grooves are distributed along the circumferential direction and the axial direction of the annular test block; The third groove group includes a plurality of groove pair groups, each of the groove pair groups includes a plurality of third vertical groove pairs respectively arranged on the inner circular surface and the outer circular surface and respectively perpendicular to the weld surface, and a third parallel groove pair respectively arranged on the inner circular surface and the outer circular surface and respectively parallel to the weld surface, and the plurality of third vertical groove pairs and the plurality of third parallel groove pairs are distributed along the circumference of the annular test block, wherein the circumferential spacing between each of the third vertical groove pairs arranged on the inner circular surface and the outer circular surface is different, and / or the circumferential spacing between each of the third parallel groove pairs arranged on the inner circular surface and the outer circular surface is different.

2. The eddy current test block for inertia friction welding components according to claim 1, in, The axial distance between two adjacent second parallel grooves is between 0.2 mm and 0.5 mm.

3. The eddy current test block for inertia friction welding assembly according to claim 2, in, The circumferential spacing between two adjacent second parallel grooves is greater than or equal to 3 times the diameter of the eddy current detector probe.

4. The eddy current test block for inertia friction welding assembly according to claim 1, in, The minimum circumferential spacing between each pair of the third vertical grooves is between 0.1 mm and 0.6 mm, and the maximum circumferential spacing is between 2 / 3 and 1 times the diameter of the eddy current detector probe; and / or, The minimum circumferential spacing between each pair of the third parallel grooves is between 0.1 mm and 0.6 mm, and the maximum circumferential spacing is between 2 / 3 and 1 times the diameter of the eddy current detector probe.

5. The eddy current test block for inertia friction welding assembly according to claim 4, in, The circumferential spacing between two adjacent pairs of the third vertical grooves is greater than or equal to 3 times the diameter of the eddy current detector probe; and / or, The circumferential spacing between two adjacent pairs of the third parallel grooves is greater than or equal to three times the diameter of the eddy current detector probe.

6. The eddy current test block for inertia friction welding components according to claim 1, in, The annular test block comprises a clamping surface opposite to the weld surface in the axial direction, and an axial distance between the clamping surface and the weld surface is greater than or equal to 20 mm.

7. The eddy current test block for inertia friction welding components according to claim 1, in, The first vertical groove, the first parallel groove, the second parallel groove, the third vertical groove, and the third parallel groove have a length less than or equal to 0.8 mm, a width less than or equal to 0.1 mm, and a depth less than or equal to 0.4 mm.

8. The eddy current test block for inertia friction welding assembly according to any one of claims 1 to 7, in, The annular test blocks are provided in two numbers, one of the two annular test blocks is made of GH4169 nickel-based high-temperature alloy, and the other is made of GH4065A nickel-based high-temperature alloy.

9. The eddy current test block for inertia friction welding assembly according to any one of claims 1 to 7, in, The first groove group is distributed in a first area on the circumference of the annular test block, the second groove group is distributed in a second area on the circumference of the annular test block, and the third groove group is distributed in a third area on the circumference of the annular test block, wherein the angle ranges of the first area, the second area and the third area are staggered circumferentially.

10. The eddy current test block for inertia friction welding components according to claim 9, in, The first area is an angle range of 0° to 90° in the clockwise direction of the circumference of the annular test block, wherein 0° points directly upwards; the second area is an angle range of 90° to 180° in the clockwise direction of the circumference of the annular test block; and the third area is an angle range of 180° to 360° in the clockwise direction of the circumference of the annular test block.

11. A method for preparing an eddy current test block for an inertia friction welding assembly, in, Used to prepare an eddy current test block as described in any one of claims 1 to 10; the preparation method comprises: Processing the shape of the annular test block so that the size of the weld joint of the annular test block is the same as the size of the weld joint of the part to be tested, wherein the material of the annular test block is the same as the material of the part to be tested; The processed annular test block is grooved to form the first groove group for sensitivity verification, the second groove group for verifying the coverage of the eddy current detector probe, and the third groove group for verifying the resolution of the eddy current detector probe.

12. The method for preparing an eddy current test block for an inertia friction welding assembly according to claim 11, in, Before processing the annular test block shape, the preparation method further comprises: Determine the size of the annular test block, the size of the annular test block includes diameter, thickness and axial length; Determine the material and welding process of the annular test block, wherein the welding process is the same as the welding process of the part to be tested; Determine the groove sizes and positions of the first groove group, the second groove group, and the third groove group on the annular test block.

13. The method for preparing an eddy current test block for an inertia friction welding assembly according to claim 12, in, Before the processed annular test block is grooved, the preparation method further comprises: The weld position of the annular test block is determined by a light corrosion method.

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