Fillet weld phased array ultrasonic detection simulation test block applied to stainless steel composite plate and intubation tube

Abstract

The utility model discloses a fillet weld phased array ultrasonic detection simulation test block applied to a stainless steel composite plate and an insertion pipe. The fillet weld phased array ultrasonic detection simulation test block comprises the stainless steel composite plate and an insertion type connection pipe, the connecting pipe is fillet-welded on the stainless steel composite plate through a full penetration welding structure, and a circle of fillet weld is formed in the circumferential direction of the connecting pipe to be connected with the stainless steel composite plate; five artificial defects are arranged in the circumferential direction of the fillet weld of the simulation test block, and comprise an inner surface pipe wall side crack artificial defect, an outer surface weld outer side crack artificial defect, a pipe wall incomplete fusion artificial defect at the 1 / 2 plate thickness of the composite plate, a groove incomplete fusion artificial defect at the 1 / 3 plate thickness of the composite plate and an uncombined artificial defect at the composite position of the composite plate. Five artificial defects are arranged on one simulation test block, and the device can be used for identifying phased array ultrasonic detection defects of fillet welds of stainless steel composite plates and plug-in type connecting pipes, calibrating a phased array ultrasonic detection instrument and a probe, controlling detection sensitivity and determining geometric dimensions of the defects.

Description

Technical Field

[0001] The utility model relates to the technical field of phased array ultrasonic detection, in particular to a phased array ultrasonic detection simulation test block for fillet welds of stainless steel composite plates and intubations. Background Art

[0002] Stainless steel composite plate is a high-performance composite steel with carbon steel as the base layer and stainless steel as the covering layer. It is widely used in the petroleum, chemical, construction and other industries due to its low cost, high strength and good corrosion resistance. It is a common steel for chemical equipment and pressure vessels with good economic benefits.

[0003] In actual production, stainless steel composite plates are often connected with plug-in pipes for the entry and exit of materials and the installation of safety accessories. They are generally connected at right angles and welded through corner joints. On the one hand, during the welding process, compared with conventional plates, the composition of the fusion zone of the stainless steel composite plate corner weld is more complex, the bonding strength is low, and defects such as cracks, lack of fusion, and lack of bonding are easily generated at the corner weld. On the other hand, during the service process, due to the structural discontinuity of the connection between the stainless steel composite plate and the pipe, a more obvious stress concentration phenomenon will occur, the flow of the internal medium fluid at the connection is blocked, the flow field will suddenly change, and the connection will be eroded, and then corrosion thinning, surface cracking, material degradation and other damage modes will be formed on the original defects at the weld.

[0004] In order to reduce the direct losses caused by these damages, ultrasonic phased array testing can be used to detect and prevent the defects of the fillet weld between the stainless steel composite plate and the insert. Compared with conventional ultrasonic testing, phased array, as a new ultrasonic testing technology, has higher detection efficiency, more detection angles, and can model defects to form three-dimensional graphics, which is more intuitive.

[0005] However, due to the different acoustic field characteristics of the base carbon steel and the cladding stainless steel, the existing defects are also different. In addition to the common plate defects such as cracks and unfused defects, the most typical new defect is the unbonded defect at the composite part of the stainless steel composite plate. This directly leads to the difficulty of using conventional flat-plate phased array test blocks to calibrate the performance of the phased array probe, control the detection sensitivity, and determine the geometric size of the defects in the phased array inspection of the stainless steel composite plate.

[0006] The existing patents related to phased array ultrasonic testing and stainless steel composite plates mainly focus on the optimization of existing phased array inspection strategies, such as patent CN115047079A (a method for rapid focusing of ultrasonic phased array for multi-layer composite plates), which proposes a new focusing method, simplifies the excitation pulse calculation, optimizes the inspection strategy, and improves the efficiency of phased array ultrasonic flaw detection on composite plates; such as patent CN215525637U (a phased array ultrasonic detection probe suitable for composite plates), which develops a new phased array ultrasonic detection probe that can accurately penetrate the anti-corrosion layer to detect the inside of the composite plate; such as patent CN112083079A (an ultrasonic detection device with a coupling agent coating function and its use method), which attempts to set a coupling agent coating device on the phased array detection device, which can effectively stabilize the flaw detection process of the composite plate, etc. Relevant research starts from the inspection strategy and effectively improves the method of phased array ultrasonic inspection of composite plates, but there is little research and development of phased array test blocks for stainless steel composite plates, and there is even less phased array test blocks for stainless steel composite plates used for plug-in pipes. Therefore, the utility model starts with a phased array test block and provides a phased array ultrasonic detection simulation test block for fillet welds of stainless steel composite plates and intubating pipes. Summary of the invention

[0007] In order to effectively perform phased array ultrasonic testing on stainless steel composite plates, the utility model provides a phased array ultrasonic testing simulation test block for fillet welds of stainless steel composite plates and insert pipes. The insert pipe is fillet welded to the stainless steel composite plate through a full penetration welding structure, and a circle of fillet welds is formed along the circumferential direction of the pipe to connect with the stainless steel composite plate. The composite process of the stainless steel composite plate must meet NB / T 47002, and the groove form must meet GB / T 150; five artificial defects are set in the circumferential direction of the fillet weld of the simulation test block, and the defect types include artificial defects of side cracks on the inner surface pipe wall, artificial defects of outer cracks on the outer surface weld, artificial defects of unfused pipe wall at 1 / 2 plate thickness of the composite plate, artificial defects of unfused groove at 1 / 3 plate thickness of the composite plate, and artificial defects of unbonded composite plate composite, so as to meet the requirements of phased array ultrasonic testing process verification.

[0008] To solve the above technical problems, the utility model is implemented as follows:

[0009] A phased array ultrasonic testing simulation test block for fillet welds of a stainless steel composite plate and a plug pipe comprises a pipe joint (1) and a stainless steel composite plate (2), wherein the stainless steel composite plate (2) is composited with a carbon steel base layer (3) and a stainless steel composite layer (4); the pipe joint (1) and the stainless steel composite plate (2) are connected by a full penetration weld structure and a fillet joint, a fillet weld (5) is formed at the joint along the circumferential direction of the pipe joint, and five artificial defects are arranged in the circumferential direction of the fillet weld (5).

[0010] The five artificial defects provided at the fillet weld (5) connecting the pipe (1) and the stainless steel composite plate (2) are: an artificial defect of a side crack of the inner surface pipe wall (6), an artificial defect of an outer crack of the outer surface weld (7), an artificial defect of a pipe wall failure to be fused at 1 / 2 of the thickness of the composite plate (8), an artificial defect of a groove failure to be fused at 1 / 3 of the thickness of the composite plate (9), and an artificial defect of failure to be bonded at the composite plate (10); the artificial defects are evenly arranged along the circumferential direction, the positions of the five defects are spaced 60° to 72° apart in the circumferential direction of the weld, and the interval between adjacent defects is at least 10 to 50 mm.

[0011] In the above-mentioned phased array ultrasonic testing simulation test block for fillet welds of a stainless steel composite plate and a plug pipe, the material of the plug pipe (1) is 304 stainless steel; the stainless steel composite plate (2) is composited by a carbon steel base (3) and a stainless steel composite layer (4), the material of the carbon steel base (3) is Q345R, the material of the stainless steel composite layer (4) is 304 stainless steel, the thickness of the carbon steel base (3) needs to be greater than or equal to 6 mm, and the composite process of the stainless steel composite plate needs to meet NB / T 47002.

[0012] In the aforementioned phased array ultrasonic testing simulation test block for fillet welds of a stainless steel composite plate and a plug pipe, the groove form of the plug pipe (1) and the stainless steel composite plate (2) is set with reference to GB / T 150, generally a single-sided V-shaped groove, and the weld adopts a full penetration structure; welding can also be performed with reference to other relevant technical standards to ensure the reliability of the fillet weld.

[0013] The five artificial defects at the corner weld (5) connecting the aforementioned connecting pipe (1) and the stainless steel composite plate (2) are as follows: the defect length of the artificial defect (6) of the side crack of the inner surface pipe wall is 10 mm, and the defect height is 4 mm; the defect length of the artificial defect (7) of the outer crack of the outer surface weld is 10 mm, and the defect height is 3 mm; the defect length of the artificial defect (8) of the pipe wall unfused at 1 / 2 of the thickness of the stainless steel composite plate is 9 mm, and the defect height is 3 mm; the defect length of the artificial defect (9) of the groove unfused at 1 / 3 of the thickness of the stainless steel composite plate is 10 mm, and the defect height is 4 mm; the defect length of the artificial defect (10) of the unbonded joint of the stainless steel composite plate is 5 mm, and the defect height is 2 mm. Beneficial Effects

[0014] (1) The utility model discloses a phased array ultrasonic testing simulation test block for the corner weld of a stainless steel composite plate and a plug, which is used for phased array ultrasonic testing to simulate the defects that may exist at the connection between the corner weld of the stainless steel composite plate and the plug in a real workpiece. Before the phased array ultrasonic testing, the test block is subjected to non-destructive testing to evaluate the accuracy and sensitivity of the detector. In specific operation, the phased array ultrasonic detector and the detection probe are used to detect known artificial defects, and the detection results are compared with the known artificial defect results in the simulation test block. The phased array detection is calibrated and the detection sensitivity is adjusted according to the differences in the form, geometric size, distribution position and defect nature of the defects.

[0015] (2) The utility model can be used for the detection, identification and verification of five defects (artificial defects of inner surface pipe wall side cracks, artificial defects of outer surface weld outer cracks, artificial defects of unfused pipe wall at 1 / 2 plate thickness of composite plate, artificial defects of unfused groove at 1 / 3 plate thickness of composite plate, and artificial defects of unbonded composite plate) of fillet welds connecting intubation and stainless steel composite plates by setting one weld and a total of five artificial defects on a simulated test block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a simulation test block of the utility model.

[0017] Among them, 1-connecting pipe, 2-stainless steel composite plate, 3-carbon steel base layer, 4-stainless steel covering, 5-corner weld connecting connecting pipe and stainless steel composite plate, 6-artificial defect of side crack of inner surface pipe wall, 7-artificial defect of outer crack of outer surface weld, 8-artificial defect of unfused pipe wall at 1 / 2 thickness of stainless steel composite plate, 9-artificial defect of unfused groove at 1 / 3 thickness of stainless steel composite plate, 10-artificial defect of unbonded joint of stainless steel composite plate. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only embodiments of a part of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. After the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] The accompanying drawings show schematic diagrams of structures according to the disclosed embodiments of the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs. Example

[0020] Figure 1 This is a schematic diagram of the simulation test block of the utility model. Figure 1 As shown, the pipe and the stainless steel composite plate are connected by an insert structure and a fillet joint. The groove form is set according to GB / T 150. A fillet weld is formed along the circumferential direction of the pipe at the connection. The weld adopts a full penetration structure. The pipe 1 is made of stainless steel. The base layer 3 of the stainless steel composite plate 2 is carbon steel. The cladding layer 4 is stainless steel. The thickness of the carbon steel base layer 3 is greater than or equal to 6 mm. Generally, the carbon steel base layer (3) and the stainless steel cladding layer (4) are composited to the stainless steel composite plate (2) with a total thickness of more than 20 mm by an explosive composite method. The stainless steel composite plate (2) with a total thickness of less than 20 mm can also be composited by a rolling composite method. The composite process refers to the composite plate standard of NB / T 47002 "Composite Plate for Steel Pressure Vessels", and non-destructive testing is performed to ensure that the composite plate itself has no production defects of the composite process.

[0021] There are five artificial defects at the connection between the connecting pipe and the stainless steel composite plate: the defect length of the artificial defect 6 of the side crack of the inner surface pipe wall is 10mm, and the height of the defect itself is 4mm; the defect length of the artificial defect 7 of the outer side crack of the outer surface weld is 10mm, and the height of the defect itself is 3mm; the defect length of the artificial defect 8 of the unfused pipe wall at 1 / 2 of the thickness of the stainless steel composite plate is 9mm, and the height of the defect itself is 3mm; the defect length of the artificial defect 9 of the unfused groove at 1 / 3 of the thickness of the stainless steel composite plate is 10mm, and the height of the defect itself is 4mm; the defect length of the artificial defect 10 of the unbonded joint of the stainless steel composite plate is 5mm, and the height of the defect itself is 2mm.

[0022] The specific operation process of the utility model is described below:

[0023] According to the inspection requirements of TSG21 "Technical Supervision Regulations for Safety of Stationary Pressure Vessels", the design and manufacturing technical requirements of GB / T 150 "Pressure Vessels", the factory data of pressure vessels and other technical documents, the inspection level and inspection strategy of the corner welds of the nozzle and the stainless steel clad plate are specified.

[0024] According to the non-destructive testing standard NB / T 47013.15 "Phase-controlled Array Ultrasonic Testing", the scanning method, probe type, focusing method, scanning angle, wedge, activation aperture, coupling agent, etc. of phased array ultrasonic testing are determined in combination with the inspection strategy and the actual workpiece thickness.

[0025] The surface of the stainless steel composite plate is polished to facilitate the movement of the probe and make the detection surface in close contact with the probe. The polishing process needs to reduce the impact on the sound beam.

[0026] When using TCG (including ACG) for sensitivity setting, the main consideration is the difference in acoustic energy transmission that may be caused by different surface conditions. If necessary, the changes caused by differences in the processing techniques of the two should also be considered.

[0027] Place the phased array ultrasonic detection probe on the surface of the stainless steel composite plate. Use coupling agent on the probe surface. Keep the coupling stable during the scanning process. Monitor the coupling when necessary. If the coupling is poor, re-scan.

[0028] Adjust the distance between the probe and the fillet weld to ensure that the detection sound beam covers the fillet weld. Generally, line scanning and longitudinal wave direct incidence methods are used for detection, and the scanning surface is generally selected on the stainless steel cladding side. For 100% coverage scanning, adjacent scanning areas should overlap by 10%.

[0029] The imaging display mode can be A-type, C-type, B-type or D-type display. When the height of the first bottom surface echo in the C-type display is less than 5% of the full scale of the display screen, and there is an obvious unbonded defect echo at the bonding surface in the B-type or D-type display, it can be determined as an unbonded defect.

[0030] Compare the phased array ultrasonic testing results with the design drawing data of the simulated test block, calibrate the phased array ultrasonic testing equipment, and adjust the detection sensitivity to ensure the effective detection of defects in the two fillet welds and verify the detection process.

[0031] Although the above description is made of the specific implementation of the present invention in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative work on the basis of the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A phased array ultrasonic testing simulation test block for fillet welds of stainless steel composite plates and intubating pipes, characterized in that: include: A pipe (1) and a stainless steel composite plate (2), wherein the stainless steel composite plate (2) is composited with a carbon steel base layer (3) and a stainless steel composite layer (4); the pipe (1) and the stainless steel composite plate (2) are connected by a full penetration weld structure and a fillet joint, wherein a fillet weld (5) is formed at the joint along the circumferential direction of the pipe, and five artificial defects are arranged in the circumferential direction of the fillet weld.

2. The phased array ultrasonic testing simulation test block for fillet welds of stainless steel composite plates and intubating pipes according to claim 1 is characterized in that: The five artificial defects are: an artificial defect of side cracks on the inner surface pipe wall (6), an artificial defect of outer cracks on the outer surface weld (7), an artificial defect of unfused pipe wall at 1 / 2 thickness of the composite plate (8), an artificial defect of unfused groove at 1 / 3 thickness of the composite plate (9), and an artificial defect of unbonded composite plate (10); the artificial defects are evenly arranged along the circumferential direction, the positions of the five defects are spaced 60° to 72° apart in the circumferential direction of the weld, and the interval between adjacent defects is at least 10 to 50 mm.

3. The phased array ultrasonic testing simulation test block for fillet welds of stainless steel composite plates and intubating pipes according to claim 1 is characterized in that: The material of the pipe (1) is 304 stainless steel; the stainless steel composite plate (2) is composed of a carbon steel base (3) and a stainless steel composite layer (4), the material of the carbon steel base (3) is Q345R, the material of the stainless steel composite layer (4) is 304 stainless steel, and the thickness of the carbon steel base (3) must be ≥6 mm.

4. The phased array ultrasonic testing simulation test block for fillet welds of stainless steel composite plates and intubating pipes according to claim 1 is characterized in that: The pipe (1) and the stainless steel composite plate (2) adopt a full penetration welding structure. The groove form shall be set in accordance with GB / T 150. The groove is a single-sided V-shaped groove, and the weld adopts a full penetration structure.

5. A phased array ultrasonic testing simulation test block for fillet welds of stainless steel composite plates and intubating pipes according to claim 1 or 2, characterized in that: The five artificial defects are as follows: the defect length of the artificial defect (6) of the side crack of the inner surface pipe wall is 10 mm, and the defect height is 4 mm; the defect length of the artificial defect (7) of the outer surface weld seam crack is 10 mm, and the defect height is 3 mm; the defect length of the artificial defect (8) of the pipe wall unfused at 1 / 2 of the thickness of the stainless steel composite plate is 9 mm, and the defect height is 3 mm; the defect length of the artificial defect (9) of the groove unfused at 1 / 3 of the thickness of the stainless steel composite plate is 10 mm, and the defect height is 4 mm; the defect length of the artificial defect (10) of the unbonded part of the stainless steel composite plate is 5 mm, and the defect height is 2 mm.

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