An eddy current test block for an inertia friction welding assembly and a method of making the same

Abstract

The present disclosure relates to an eddy current testing block for an inertia friction welding assembly and a preparation method thereof, the eddy current testing block comprising: a ring-shaped testing block and a first groove set, a second groove set and a third groove set on the ring-shaped testing block, the first groove set comprising a first vertical groove and a first parallel groove; the second groove set comprising a plurality of second parallel grooves arranged on the inner and outer circular surfaces respectively and parallel to the weld surface; the third groove set comprising a plurality of groove pairs, each groove pair comprising a plurality of third vertical groove pairs and third parallel groove pairs, wherein the circumferential spacing between each third vertical groove pair arranged on the inner and outer circular surfaces is different, and / or the circumferential spacing of each third parallel groove pair arranged on the inner and outer circular surfaces is different. The present disclosure can accurately and comprehensively evaluate the defect equivalent of the inertia friction welding assembly with curvature, avoiding misjudgment and missing judgment of defects.

Description

TECHNICAL FIELD

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

[0002] Modern civil aviation engines not only require high cycle parameters, but also need to pass airworthiness certification, so very strict requirements are put forward for the service life, safety and reliability of its parts. Among various engine parts, disc shaft parts bear relatively harsh loads, and once they fail unexpectedly, they will cause disastrous consequences. Therefore, compared with other parts, the safety and reliability of key disc shaft components are more stringent, and the reliability of their detection has always been one of the focuses of each aviation engine company.

[0003] Compared with bolted disc drum / disc shaft assemblies, welding connection has obvious weight reduction advantage. As a solid phase welding method, inertia friction welding has the advantages of good welding joint quality, high dimensional accuracy and wide application range compared with electron beam welding, and is the most suitable welding process for aviation engine rotating parts, and is one of the important measures to realize the performance of commercial aviation engines.

[0004] The inertia friction welding assembly (such as disc drum / disc shaft assembly) of the aviation engine has a small welding seam thickness, and the material weldability and welding processability are poor, or the welding process is not properly controlled, so that welding defects may occur, such as cracks, weak connections, intermetallic compounds, and misalignments, which affect the quality of the welded joint, especially the defects on the surface and subsurface, which are more likely to cause crack initiation and propagation. Eddy current testing can detect surface and subsurface defects of friction welding assemblies, and the detection effect is not affected by the direction of the defects, so it is an important method for detecting the quality of inertia friction welded joints.

[0005] Due to the complex shape and structure of the inertia friction welding assembly, and the strict acceptance requirements, the conventional eddy current testing uses a flat plate slot test block, which is difficult to fully simulate the actual situation on the inertia friction welding assembly, and therefore cannot be applied. SUMMARY

[0006] In order to overcome the problems 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 eddy current testing evaluation.

[0007] The present disclosure provides a kind of eddy current testing block for inertia friction welding assembly, comprising: annular test block and first slot group, second slot group and third slot group arranged on the annular test block, the first slot group, the second slot group and the third slot group are distributed along the circumference of the annular test block;The annular test block includes inner circular surface, outer circular surface and weld surface;The first slot group includes first vertical slot respectively arranged on the inner circular surface and the outer circular surface and respectively perpendicular to the weld surface, and first parallel slot respectively arranged on the inner circular surface and the outer circular surface and respectively parallel to the weld surface, the first vertical slot and the first parallel slot are distributed along the circumference of the annular test block;The second slot group includes a plurality of second parallel slots respectively arranged on the inner circular surface and the outer circular surface and parallel to the weld surface, and a plurality of the second parallel slots are distributed along the circumference and the axial direction of the annular test block;The third slot group includes a plurality of slot pairs, each of the slot pairs includes a plurality of third vertical slot pairs respectively arranged on the inner circular surface and the outer circular surface and respectively perpendicular to the weld surface, and third parallel slot pairs respectively arranged on the inner circular surface and the outer circular surface and respectively parallel to the weld surface, a plurality of the third vertical slot pairs and a plurality of the third parallel slot pairs are distributed along the circumference of the annular test block, wherein the circumferential spacing between each of the third vertical slot pairs arranged on the inner circular surface and the outer circular surface is different, and / or the circumferential spacing of each third parallel slot pair arranged on the inner circular surface and the outer circular surface is different.

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

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

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

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

[0013] In some embodiments, a length of the first vertical groove, the first parallel groove, the second parallel groove, the third vertical groove, and the third parallel groove is less than or equal to 0.8 mm, a width is less than or equal to 0.1 mm, and a depth is less than or equal to 0.4 mm.

[0014] In some embodiments, two annular test blocks are provided, one of which 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 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 first area, the second area, and the third area are angularly offset in the circumferential direction.

[0016] In some embodiments, 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 to the top, 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.

[0017] The present disclosure also provides a preparation method of an eddy current test test block for an inertia friction welding assembly, for preparing the eddy current test test block as described above; the preparation method comprises: machining 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 to-be-detected piece, wherein the material of the annular test block is the same as the material of the to-be-detected piece; and performing groove processing on the machined annular test block, so that the first groove group for sensitivity verification, 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 shape of the annular test block, the preparation method further comprises: determining the size of the annular test block, the size of the annular test block comprising a diameter, a thickness, and an axial length; determining the material and the welding process of the annular test block, wherein the welding process is the same as the welding process of the to-be-detected piece; and determining the groove size and position of the first groove group, the second groove group, and the third groove group on the annular test block.

[0019] In some embodiments, before the notched processing of the processed annular test block, the preparation method further comprises: determining the weld position of the annular test block by using a light corrosion method.

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

[0021] The present disclosure sets different notches at different circumferential positions of the annular test block, i.e., a first notch group, a second notch group, and a third notch group, 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, and thus the inertia friction welded assembly with curvature can be comprehensively and accurately evaluated.

[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 DRAWINGS

[0023] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0024] Figure 1 is a schematic view of an eddy current test block for an inertia friction welded assembly according to an exemplary embodiment;

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

[0026] Figure 3 is an expanded schematic view of an eddy current test block for an inertia friction welded assembly according to an exemplary embodiment;

[0027] Figure 4 is another expanded schematic view of an eddy current test block for an inertia friction welded assembly according to an exemplary embodiment;

[0028] Figure 5 is a flowchart of a preparation method of an eddy current test block for an inertia friction welded assembly according to an exemplary embodiment. DETAILED DESCRIPTION

[0029] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the exemplary embodiments is intended to apply to various alternative embodiments as well. The following description is not meant to limit the disclosed embodiments to a particular application. Rather, the intention is to convey the disclosure of the exemplary embodiments to those skilled in the art with the realization that many modifications can be made within the scope of the attached claims.

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

[0031] Eddy current inspection refers to the generation of eddy currents in a metal conductor when a coil with an alternating current is brought close to the conductor. The eddy currents are generated due to electromagnetic induction. At the same time, the eddy currents also generate a magnetic field, which affects the magnetic field of the detection coil, thereby changing the voltage and impedance of the conductor. Defects on the surface and near the surface of the conductor will affect the strength and distribution of the eddy currents, and the changes in the eddy currents will affect the changes in the voltage and impedance of the detection coil. The existence of defects in the conductor can be inferred from these changes. The method of detecting defects using changes in eddy current signals is eddy current inspection.

[0032] Reference block, also known as a reference standard, refers to a sample block with a simple geometric shape, artificial reflector or simulated defect with known fixed characteristics. It usually has a specified material, surface state, geometric shape and size, and can be used for eddy current inspection equipment setting and calibration, defect evaluation, etc.

[0033] The eddy current test block of the present disclosure can include a ring-shaped test block 10 and a first groove set 11, a second groove set 12 and a third groove set 13 disposed on the ring-shaped test block 10, the first groove set 11, the second groove set 12 and the third groove set 13 are distributed along the circumferential direction C of the ring-shaped test block, the ring-shaped test block 10 can include an inner circular surface 101, an outer circular surface 102 and a weld surface 103, the first groove set 11 can include first vertical grooves 111 disposed on the inner circular surface 101 and the outer circular surface 102 respectively and perpendicular to the weld surface 103, and first parallel grooves 112 disposed on the inner circular surface 101 and the outer circular surface 102 respectively 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 ring-shaped test block 10; the second groove set 12 can include a plurality of second parallel grooves 121 disposed on the inner circular surface 101 and the outer circular surface 102 respectively 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 ring-shaped test block 10; the third groove set 13 can include a plurality of groove pair sets, each groove pair set can include a plurality of third vertical groove pairs 131 disposed on the inner circular surface 101 and the outer circular surface 102 respectively and perpendicular to the weld surface 103, and third parallel groove pairs 132 disposed on the inner circular surface 101 and the outer circular surface 102 respectively 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 ring-shaped test block 10, wherein the circumferential spacing between each third vertical groove pair 131 disposed on the inner circular surface 101 and the outer circular surface 102 is different, and / or the circumferential spacing of each third parallel groove pair 132 disposed on the inner circular surface 101 and the outer circular surface 102 is different.

[0034] The ring-shaped test block 10 can have a curved profile and can be used to simulate the actual situation after the welding of an inertia friction welding assembly having a curved surface. The inertia friction welding assembly can be, for example, a disc drum / disc shaft assembly of an aero-engine or the like assembly having a curved surface. The ring-shaped test block 10 can be a ring-shaped hollow structure with a certain thickness and can include an inner circular surface 101, an outer circular surface 102 and a weld surface 103 substantially perpendicular to the inner circular surface 101 and the outer circular surface 102.

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

[0036] As Figure 2As shown, the first groove group 11 can include first vertical grooves 111 disposed on the inner circular surface 101 and the outer circular surface 102 respectively and perpendicular to the weld surface 103, and first parallel grooves 112 disposed on the inner circular surface 101 and the outer circular surface 102 respectively and parallel to the weld surface 103. It can be referred to that the first vertical grooves 111 and the first parallel grooves 112 are engraved on the inner circular surface 101 of the annular test block 10 respectively and perpendicular to the weld surface 103, and the first vertical grooves 111 and the first parallel grooves 112 are engraved on the outer circular surface 102 of the annular test block 10 respectively and parallel to the weld surface 103. That is, the inner circular surface 101 and the outer circular surface 102 of the annular test block 10 both contain 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 distribution of the first vertical grooves 111 and the first parallel grooves 112 along the circumferential direction of the annular test block 10 can be referred 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 distributed along the annular circumferential direction of the annular test block 10.

[0038] For example, as shown in FIG. 1, 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 sequentially distributed in the circumferential direction along the first area of the annular test block 10 in a clockwise direction, for example, can be uniformly distributed at equal intervals. Figure 2

[0039] The second groove group 12 can include a plurality of second parallel grooves 121 disposed on the inner circular surface 101 and the outer circular surface 102 respectively 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 distribution of the plurality of second parallel grooves 121 along the circumferential direction and the axial direction of the annular test block 10 can be that the plurality of second parallel grooves 121 on the inner circular surface 101 are distributed along the circumferential direction of the annular test block 10, while the plurality of second parallel grooves 121 on the inner circular surface 101 are distributed along the axial direction. The plurality of second parallel grooves 121 on the outer circular surface 102 are distributed along the circumferential direction of the annular test block 10, while the plurality of second parallel grooves 121 on the outer circular surface 102 are distributed along the axial direction of the annular test block 10.

[0041] For example, as shown in FIG. 1, the plurality of second parallel grooves 121 on the inner circular surface 101 and the outer circular surface 102 can be sequentially distributed in the circumferential direction along the second area of the annular test block 10 in a clockwise direction, for example, can be uniformly distributed at equal intervals. Figure 2 ​and 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 behind the first parallel groove 121 and offset axially. The axial offset can be, for example, the second parallel groove 121 is located axially behind the first parallel groove 121 (in the direction of the arrow in the figure), the third parallel groove 121 is located clockwise behind the second evaluation groove 121 and offset axially by L, and so on. The second region of the annular test block 10 can be a region of 90° to 180° clockwise around the circumference of the annular test block 10.

[0042] like Figure 2 and Figure 4 As shown, the third groove group 13 may include multiple groove pairs. Each groove pair includes multiple third vertical groove pairs 131 respectively disposed on the inner circular surface 101 and the outer circular surface 102 and respectively perpendicular to the weld surface 103, and a third parallel groove pair 132 respectively disposed on the inner circular surface 101 and the outer circular surface 102 and respectively parallel to the weld surface 103. This means that multiple third vertical grooves perpendicular to the weld surface 103 are engraved on the inner circular surface 101. For 131, multiple pairs of third vertical grooves 131 perpendicular to the weld surface 103 are engraved on the outer circular surface 102, multiple pairs of third parallel grooves 132 parallel to the weld surface 103 are engraved on the inner circular surface 101, and multiple pairs of third parallel grooves 132 parallel to the weld surface 103 are engraved on the outer circular surface 102. That is, the inner circular surface 101 has both vertical and parallel grooves, and the outer circular surface 102 has both vertical and parallel grooves. Here, "groove pair" can refer to two grooves combined into one groove pair. For example, the third vertical groove pair 131 can be two third vertical grooves combined into one third vertical groove pair 131.

[0043] Multiple third vertical groove pairs 131 and multiple third parallel groove pairs 132 can be distributed circumferentially along the annular test block 10. Specifically, the inner circular surface 101 has multiple third vertical groove pairs 131 distributed circumferentially (C), the outer circular surface 102 has multiple third vertical groove pairs 131 distributed circumferentially (C), the inner circular surface 101 has multiple third parallel groove pairs 132 distributed circumferentially (C), and the inner circular surface 101 has multiple third parallel groove pairs 132 distributed circumferentially (C). Furthermore, the multiple third vertical groove pairs 131 on the inner circular surface 101 and the multiple third vertical groove pairs 131 on the outer circular surface 101 are combined into one groove pair group, and the multiple third parallel groove pairs 132 on the inner circular surface 101 and the multiple third parallel groove pairs 132 on the outer circular surface 101 are combined into one groove pair group, with the multiple groove pair groups distributed circumferentially (C).

[0044] like Figure 4As shown, the circumferential spacing between each pair of third vertical grooves 131 on the inner circular surface 101 and the outer circular surface 102 is different. This can mean 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 also different.

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

[0046] For example, such as Figure 4 As shown, in the third region of the annular test block 10, a plurality of third vertical groove pairs 131 on the inner circular surface 101, a plurality of third vertical groove pairs 131 on the outer circular surface 102, a plurality of third parallel groove pairs 132 on the inner circular surface 101, and a plurality of third parallel groove pairs 132 on the outer circular surface 102 are sequentially arranged in a clockwise direction. The third region can be a region ranging from 180° to 360° in a clockwise direction around the circumference of the annular test block 10.

[0047] This disclosure allows for the verification of 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 by setting different grooves at different circumferential positions on the annular test block, namely the first groove group, the second groove group, and the third groove group, thereby enabling a comprehensive and accurate evaluation of the inertial friction welding assembly with curvature.

[0048] In some embodiments, two annular test blocks 10 may be provided, one of which may be made of GH4169 nickel-based high-temperature alloy and the other may be made of GH4065A nickel-based high-temperature alloy. The above materials are the same as those used in inertial friction welding assemblies of aero-engine disc drums / disc shafts, enabling realistic evaluation of aero-engine disc drums / disc shafts.

[0049] In some embodiments, the length 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 may be less than or equal to 0.8 mm, the width may be less than or equal to 0.1 mm, and the depth may be less than or equal to 0.4 mm. For example, the length may be 0.76 mm, the depth may be 0.38 mm, and the width may be 0.08 mm. The shape of the grooves may be rectangular or U-shaped.

[0050] The larger the length, width and depth of the groove, the easier the defect is detected, but the space of the ring-shaped test block is large, the number of grooves is small, and the detection range is small. The smaller the length, width and depth of the groove, the more difficult it is to be detected, and the higher the precision of the eddy current detector probe needs to be detected. In other words, the higher the precision of the probe is detected. Therefore, the length, width and depth of the groove are limited in the above range, which can meet the detection range requirement and detect the probe with higher precision.

[0051] In some embodiments, as shown in FIG. 1B, the axial spacing between two adjacent second parallel grooves 121 can be between 0.2mm and 0.5mm. The numerical range described in the disclosure can include numerical end values and any value within the range. In some embodiments, the axial spacing between two adjacent second parallel grooves 121 can be 0.3mm. Figure 3

[0052] If the axial spacing is too large, the space is occupied, the number of grooves is reduced, and the detection range is small. If the axial spacing is too small, the detection precision is high. Therefore, the axial spacing is limited in the range, which can meet the detection range requirement and the probe precision requirement.

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

[0054] For example, the third vertical groove pair 131 can be provided with 10, and the circumferential spacing between each third vertical groove pair 131 in the circumferential direction of the ring-shaped test block 10 can be 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.5mm, 2mm, 3mm, 4mm, respectively.

[0055] As shown in FIG. 1B, the circumferential minimum spacing between each third parallel groove pair 132 can be between 0.1mm and 0.6mm, and the circumferential maximum spacing can be 2 / 3 to 1 times the diameter of the eddy current detector probe. The distance between the two grooves of the parallel groove pair is the distance between the end heads of the two adjacent grooves. Figure 4

[0056] ​​​For example, the circumferential spacing between each third parallel groove pair 132 gradually increases in the circumferential direction of the annular test block 10. For example, the third parallel groove pair 132 can be provided with 10, and the circumferential spacing between each third parallel groove pair 132 in the circumferential direction of the annular test block 10 is 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.5mm, 2mm, 3mm, 4mm in turn.

[0057] If the circumferential minimum spacing is too large, it occupies space, the number of grooves is reduced, and the detection range is small; if the circumferential minimum spacing is too small, it is difficult to distinguish, and the accuracy requirement is high, therefore, the present disclosure limits the above-mentioned circumferential maximum spacing and circumferential minimum spacing in the range, which can meet the detection range requirement and the accuracy requirement.

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

[0059] If the circumferential spacing is too large, it occupies space, the number of grooves is reduced, and the detection range is small; if the circumferential spacing is too small, the interference between adjacent groups is large, therefore, the present disclosure limits the above-mentioned circumferential spacing in the range, which can meet the detection range requirement and avoid mutual interference.

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

[0061] The present disclosure also provides a preparation method of the eddy current test block for the inertia friction welding assembly, as shown in Figure 5 for preparing the eddy current test block mentioned above; the preparation method can include steps S11 and S12.

[0062] Step S11, 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 piece to be detected, wherein the material of the annular test block is the same as the material of the piece to be detected.

[0063] The same material as the piece to be detected is used to process the pre-weld structure, wherein the pre-weld structure has the same diameter and thickness as the pre-weld diameter and thickness of the piece to be detected.

[0064] Step S12, after the machining of the annular test block, groove processing is performed to form a first groove group for sensitivity verification, 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] The groove is engraved by electric spark, mechanical, laser or other methods, and the maximum tolerance of the groove size is ±10%. The groove size is measured by covering type, plug gauge, microscope measurement, test piece dissection, etc. If it does not meet the requirements, the groove is re-engraved. After measurement, the welding comparison test ring number and the material quality of the two sides of the base material are marked by vibration, steel stamp, electric spark, etc.

[0066] 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 by setting the first groove group, the second groove group and the third groove group at different circumferential positions of the annular test block. It can accurately and comprehensively evaluate the defect equivalence of the inertia friction welding assembly with curvature, and avoid misjudgment and missed judgment of defects.

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

[0068] The size of the annular test block is determined, including the diameter, thickness and axial length.

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

[0070] The material and welding process of the annular test block are determined, wherein 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 welding joint to be detected.

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

[0073] According to the standard requirements or acceptance requirements, the sensitivity verification groove requirements required for eddy current detection are determined, and the detection sensitivity is set to be less than or equal to the minimum reject defect size. The groove should be located on the weld and distributed on the inner and outer circular surfaces of the weld, and should include grooves parallel and perpendicular to the weld.

[0074] The welding ring-shaped test block is rough machined after welding by a mechanical processing method. After processing, the flash is removed by a fluorescent detection method. At this time, the single-sided processing allowance is preferably ≥0.5 mm;

[0075] The ring-shaped test block is subjected to post-weld heat treatment by using the same heat treatment system as the part to be inspected. Then, it is processed to the same local structure as the part to be inspected. The surface finish is preferably Ra 0.8 μm or better.

[0076] It can be further understood that "multiple" in the present disclosure refers to two or more, and other quantifiers are similar. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. The singular forms "a", "said" and "the" 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", and the like are used to describe various information, but these 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 importance. In fact, the expressions "first", "second", and the like can be used interchangeably. For example, 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 without departing from the scope of the present disclosure.

[0078] It can be further understood that although the operations are described in a specific order in the accompanying drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order or in a serial order, or requiring all the shown operations to be performed to obtain the desired results. In a specific environment, multi-tasking and parallel processing can be advantageous.

[0079] Other embodiments of the present disclosure will be apparent to those skilled in the art upon consideration of the specification and practice of the present disclosure disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles thereof and include the known or customary practice of the art to which the present disclosure pertains. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0080] It should be understood that the present disclosure is not limited to the precise 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 limited only by the appended claims.

Claims

1. An eddy current testing block for inertial friction welding assemblies, wherein, include: An annular test block and a first groove group, a second groove group and a third groove group disposed 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 includes an inner circular surface, an outer circular surface and a weld surface; The first groove group includes a first vertical groove respectively disposed on the inner circular surface and the outer circular surface and respectively perpendicular to the weld surface, and a first parallel groove respectively disposed on the inner circular surface and the outer circular surface and respectively parallel to the weld surface. The first vertical groove and the first parallel groove are distributed along the circumference of the annular test block. The second groove group includes a plurality of second parallel grooves respectively disposed on the inner circular surface and the outer circular surface and parallel to the weld surface, the plurality of second parallel grooves being distributed along the circumferential and axial directions of the annular test block; The third groove group includes multiple groove pairs. Each groove pair includes multiple third vertical groove pairs respectively disposed on the inner circular surface and the outer circular surface and perpendicular to the weld surface, and multiple third parallel groove pairs respectively disposed on the inner circular surface and the outer circular surface and parallel to the weld surface. The multiple third vertical groove pairs and multiple third parallel groove pairs are distributed circumferentially along the annular test block. The circumferential spacing between each third vertical groove pair disposed on the inner circular surface and the outer circular surface is different, and / or the circumferential spacing between each third parallel groove pair disposed on the inner circular surface and the outer circular surface is different.

2. The eddy current testing block for inertial friction welding assemblies according to claim 1, wherein, The axial distance between two adjacent second parallel grooves is between 0.2 mm and 0.5 mm.

3. The eddy current testing block for inertial friction welding assemblies according to claim 2, wherein, The circumferential distance between two adjacent second parallel grooves is greater than or equal to three times the diameter of the eddy current detector probe.

4. The eddy current testing block for inertial friction welding assemblies according to claim 1, wherein, 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 2 / 3 to 1 times the diameter of the eddy current detector probe; and / or, The minimum circumferential spacing between each of the third parallel groove pairs is 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.

5. The eddy current testing block for inertial friction welding assemblies according to claim 4, wherein, The circumferential spacing between two adjacent pairs of the third vertical grooves is greater than or equal to three times the diameter of the eddy current detector probe; and / or, The circumferential distance between two adjacent third parallel groove pairs is greater than or equal to three times the diameter of the eddy current detector probe.

6. The eddy current testing block for inertial friction welding assemblies according to claim 1, wherein, The annular test block includes a clamping surface opposite to the weld surface in the axial direction, and the axial distance between the clamping surface and the weld surface is greater than or equal to 20 mm.

7. The eddy current testing block for inertial friction welding assemblies according to claim 1, wherein, The length of the first vertical groove, the first parallel groove, the second parallel groove, the third vertical groove, and the third parallel groove is less than or equal to 0.8 mm, the width is less than or equal to 0.1 mm, and the depth is less than or equal to 0.4 mm.

8. The eddy current testing block for inertial friction welding assemblies according to any one of claims 1-7, wherein, Two annular test blocks are provided, one of which 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 testing block for inertial friction welding assemblies according to any one of claims 1-7, wherein, The first groove group is distributed in a first region of the annular test block in the circumferential direction, the second groove group is distributed in a second region of the annular test block in the circumferential direction, and the third groove group is distributed in a third region of the annular test block in the circumferential direction, wherein the angle ranges of the first region, the second region and the third region are staggered in the circumferential direction.

10. The eddy current testing block for inertial friction welding assemblies according to claim 9, wherein, The first region is the angular range of 0° to 90° in the clockwise direction of the circumference of the annular test block, where 0° points directly upward; the second region is the angular range of 90° to 180° in the clockwise direction of the circumference of the annular test block; and the third region is the angular 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 testing block for an inertial friction welding assembly, wherein, A method for preparing an eddy current testing block as described in any one of claims 1-10; the preparation method includes: The annular test block is machined to make the size of the weld joint of the annular test block the same as the size of the weld joint of the test piece, wherein the material of the annular test block is the same as the material of the test piece. The processed annular test block is grooved to form a first groove group for sensitivity verification, 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.

12. The method for preparing an eddy current testing block for an inertial friction welding assembly according to claim 11, wherein, Before processing the shape of the annular test block, the preparation method further includes: The dimensions of the annular test block are determined, including its diameter, thickness, and axial length. The material and welding process of the annular test block are determined, wherein the welding process is the same as that of the test piece; 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.

13. The method for preparing an eddy current testing block for an inertial friction welding assembly according to claim 12, wherein, Before grooving the processed annular test block, the preparation method further includes: The location of the weld seam in the annular test block was determined using a light corrosion method.

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