CN217688725U - Boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block - Google Patents
Boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block Download PDFInfo
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- CN217688725U CN217688725U CN202221186240.1U CN202221186240U CN217688725U CN 217688725 U CN217688725 U CN 217688725U CN 202221186240 U CN202221186240 U CN 202221186240U CN 217688725 U CN217688725 U CN 217688725U
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Abstract
The utility model discloses a belong to nondestructive test technical field, specifically be a boiler receives hot side T91 and TP347 xenogenesis steel butt weld simulation test block, the bordure way still includes: first defect arrangement department, second defect arrangement department, third defect arrangement department, fourth defect arrangement department, T91 material and TP347 material, the T91 material sets up the one end at the pipeline, the beneficial effects of the utility model are that: through leading into the xenogenesis steel welding seam with phased array ultrasonic testing and detecting in, in order to grope out the echo structure of defect and non-defective tissue in the xenogenesis steel welding seam in the phased array ultrasonic testing, make T91 and TP347 artificial simulation test block, find unusual echo position according to the defect that xenogenesis steel welding seam welding produced easily and field test and carry out the pertinence defect position and arrange, through the phased array ultrasonic testing technique, carry out comprehensive coverage detection to the welding seam, replace on-the-spot conventional ultrasonic testing and ray detection equipment, improve on-the-spot detection efficiency and relevance ratio.
Description
Technical Field
The utility model relates to a nondestructive test technical field specifically is a boiler receives hot side T91 and TP347 xenogenesis steel butt weld simulation test block.
Background
A steam-water system of a thermal power plant is composed of a boiler, a steam turbine, a condenser, a high-low pressure heater, a condensate pump, a feed pump and the like, and comprises a steam-water circulation system, a chemical water treatment system, a cooling system and the like, in addition, a reheating circulation system is also adopted in an ultrahigh pressure unit, namely, the steam which does work for a period of time is extracted from the outlet of a high-pressure cylinder of the steam turbine, the steam is sent into the reheated steam of the boiler to be heated and then is led into a medium pressure cylinder of the steam turbine to continue expansion and work, the steam sent out from the medium pressure cylinder is sent into a low pressure cylinder to continue work, heating surface pipes in the steam-water system of the boiler refer to water wall pipes, coal economizer pipes, superheater pipes and reheater pipes, the heating surface of the boiler is easy to generate defects when working under high temperature and high pressure and steam medium for a long time, and small-diameter pipes are easy to generate defects because the butt-joint of dissimilar steel such as T91 and 347 butt joint in the heating surface of the boiler, such as the superheater.
The failure types of the tube panel of the heating surface of the boiler in the power plant are various, wherein the cracking and leakage of a dissimilar steel welding joint is a common reason of the tube panel leakage of the heating surface, the welding joint of the dissimilar steel which has more failure is a welding joint of ferrite steel and austenite steel, the welding joint of the dissimilar steel adopts a nickel-based welding wire, the difference of the components of the welding joint and base materials on two sides of the welding joint is larger, particularly, a heterogeneous interface is formed on two sides of a fusion line on one side of ferrite, and the binding force of the two sides of the heterogeneous interface is weaker due to the difference of phase components; the thermal expansion coefficients of the materials on the two sides are different, so that large thermal stress can be generated when the thermal load of the unit is changed; the chemical potentials of the materials on the two sides are different, electrochemical corrosion is easy to generate in a corrosive environment, a dissimilar steel welding joint is easy to crack in a heat-affected fine grain area on the T91 steel side, after postweld heat treatment, the high-temperature creep strength is reduced, the dissimilar steel welding joint is easy to crack under external force, the common dissimilar steel joint fails and mainly cracks along a ferrite-side fusion line, the welding quality, the operating environment and the stress state are abnormal, the dissimilar steel joint is likely to crack or accelerate, and the conventional ultrasonic detection effect on the dissimilar steel quality is not obvious at present.
Therefore, the invention is necessary to provide a simulation test block for the butt weld of dissimilar steels of T91 and TP347 boiler heating surface.
SUMMERY OF THE UTILITY MODEL
In view of above-mentioned and/or current boiler heating surface T91 and the problem that exists in the TP347 dissimilar steel butt weld simulation test block, provided the utility model discloses.
Therefore, the utility model aims at providing a boiler receives hot side T91 and TP347 xenogenesis steel butt weld simulation test block, through leading into the xenogenesis steel welding seam with phased array ultrasonic testing and detect, in order to grope out the echo structure of defect and non-defective tissue in the xenogenesis steel welding seam in the phased array ultrasonic testing, make T91 and TP347 artificial simulation test block, the defect and the site test that produce easily according to xenogenesis steel welding seam welding discover that unusual echo position carries out the pertinence defective position and arrange, through the phased array ultrasonic testing technique, carry out the comprehensive cover to the welding seam and detect, replace on-the-spot conventional ultrasonic testing and ray detection equipment, improve on-the-spot detection efficiency and relevance rate, can solve the above-mentioned problem that proposes conventional supersound to xenogenesis steel quality testing effect obscure.
For solving the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:
a boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block, it includes: a conduit, further comprising: the pipeline comprises a first defect arrangement position, a second defect arrangement position, a third defect arrangement position, a fourth defect arrangement position, a T91 material and a TP347 material, wherein the T91 material is arranged at one end of the pipeline, and the TP347 material is arranged at the other end of the pipeline.
As a boiler receives hot side T91 and TP347 dissimilar steel butt weld simulation test block's an preferred scheme, wherein: a first defect arrangement position is arranged at a T91 material side weld seam, and the first defect arrangement position is a 15mm long surface crack.
As a boiler receives hot side T91 and TP347 dissimilar steel butt weld simulation test block's an preferred scheme, wherein: the T91 material side groove face is provided with a second defect arrangement position, and the second defect arrangement position is not fused for 15mm.
As a boiler receives hot side T91 and TP347 dissimilar steel butt weld simulation test block's an preferred scheme, wherein: the TP347 material side groove surface is provided with a third defect arrangement position, and the third defect arrangement position is not fused for 20mm.
As a boiler receives hot side T91 and TP347 dissimilar steel butt weld simulation test block's an preferred scheme, wherein: and setting a fourth defect arrangement position along the center line of the bottom surface of the welding seam, wherein the fourth defect arrangement position is a crack with the length of 20mm.
As a boiler receives a preferred scheme of hot side T91 and TP347 xenogenesis steel butt weld simulation test block, wherein: the first defect arrangement position, the second defect arrangement position, the third defect arrangement position and the fourth defect arrangement position are distributed at equal intervals along the circumferential direction of the pipeline by 360 degrees.
As a boiler receives a preferred scheme of hot side T91 and TP347 xenogenesis steel butt weld simulation test block, wherein: the pipeline specification is 60 by 8mm, and the pipeline length is 200mm.
As a boiler receives hot side T91 and TP347 dissimilar steel butt weld simulation test block's an preferred scheme, wherein: and the welding wire between the T91 material and the TP347 material is a nickel-based welding wire.
Compared with the prior art:
by manufacturing the T91 and TP347 artificial simulation test blocks, according to the four defects easily generated by welding of dissimilar steel welding seams and the fact that the positions of abnormal echoes are subjected to targeted defect position arrangement in field tests, the welding seams are subjected to comprehensive coverage detection through a phased array ultrasonic detection technology, conventional ultrasonic detection and ray detection equipment on the field are replaced, and the field detection efficiency and the detection rate are improved.
Drawings
FIG. 1 is a schematic diagram of a boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block of the present invention;
FIG. 2 is the utility model relates to a boiler heating surface T91 and TP347 dissimilar steel butt weld pipeline in simulation test block's schematic diagram.
In the figure: a first defect arrangement 1, a second defect arrangement 2, a third defect arrangement 3, a fourth defect arrangement 4, a T91 material 5, a TP347 material 6, a pipe 100.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a boiler heating surface T91 and TP347 xenogenesis steel butt weld simulation test block, have and pass through phased array ultrasonic testing technique, cover the detection comprehensively to the welding seam, replace on-the-spot conventional ultrasonic testing and ray detection equipment, improve on-the-spot detection efficiency and relevance ratio, utilize ultrasonic phased array probe, instrument and software technology to control the ultrasonic sound and restraint, make it cover and be detected the material, and generate the advantage of the inside discontinuous detection image of being detected the material, please refer to and read 1-2, including pipeline 100, still include: a first defect arrangement position, a second defect arrangement position, a third defect arrangement position, a fourth defect arrangement position, a T91 material and a TP347 material;
the T91 material 5 is arranged at one end of the pipeline 100, the TP347 material 6 is arranged at the other end of the pipeline 100, the specification of the pipeline 100 is 60 x 8mm, the length of the pipeline 100 is 200mm, welding wires between the T91 material 5 and the TP347 material 6 are nickel-based welding wires, four defects are arranged on the pipeline 100, a first defect arrangement part 1, a second defect arrangement part 2, a third defect arrangement part 3 and a fourth defect arrangement part 4 are distributed along the circumference of the pipeline 100 at equal intervals, artificial simulation test blocks of the T91 material 5 and the TP347 material 6 are manufactured, and the specific defect position arrangement is carried out according to defects easily generated by welding of dissimilar steel welding seams and abnormal echo positions found in field tests.
A first defect arrangement part 1 is arranged at a weld joint line on the side of the T91 material 5, and the first defect arrangement part 1 is a 15mm long surface crack.
The T91 material 5 side groove face is provided with a second defect arrangement part 2, the second defect arrangement part 2 is not fused for 15mm in length, and the second defect arrangement part 2 is used for verifying that when the heterogeneous steel is detected on the T91 material 5 side by phased array ultrasonic detection, the defect echo characteristics are not fused on the T91 material 5 side so as to be distinguished from the heterogeneous steel grain boundary echo.
And a third defect arrangement part 3 is arranged on the slope surface of the TP347 material 6 side, the unfused length of the third defect arrangement part 3 is 20mm, and the capability of detecting the unfused defect by the phased array method for the stainless steel grain large side is verified.
The method is characterized in that a fourth defect arrangement position 4 is arranged along the center line of the bottom surface of a welding seam, the fourth defect arrangement position 4 is a crack with the length of 20mm, the discovery capability of a phased array method for detecting the crack of the bottom surface is verified, and compared with a bottom surface extra-high echo, the difference between the four defects is summarized, the defects of butt welding seams of dissimilar steels can be better discovered, the phased array ultrasonic detection technology is used for comprehensively covering and detecting the welding seam, the on-site conventional ultrasonic detection and ray detection equipment is replaced, the on-site detection efficiency and detection rate are improved, an ultrasonic beam is controlled by utilizing an ultrasonic phased array probe, an instrument and a software technology, the ultrasonic beam is enabled to cover a detected material, and a discontinuous detection image inside the detected material is generated.
When the phased array ultrasonic detection instrument is used specifically, a user places a detection probe of the phased array ultrasonic detection instrument at a proper position on the surface of a pipeline 100, performs covering scanning detection on a first defect arrangement position 1, a second defect arrangement position 2, a third defect arrangement position 3 and a fourth defect arrangement position 4, finds the first defect arrangement position 1, the second defect arrangement position 2, the third defect arrangement position 3 and the fourth defect arrangement position 4, and performs positioning and quantitative recording of defects, wherein a T91 material 5 is arranged at one end of the pipeline 100, a TP347 material 6 is arranged at the other end of the pipeline 100, the specification of the pipeline 100 is 60 × 8mm, four defects are arranged on the pipeline 100 and are distributed at equal intervals along the circumferential direction of the pipeline 100, artificial simulation weld joint test blocks of the T91 material 5 and the TP347 material 6 are manufactured, and specific defect position arrangement is performed according to defects easily generated by dissimilar steel welding and abnormal echo positions found by field tests, the method is characterized in that a first defect arrangement part 1 is arranged at a weld joint line of a T91 material 5 side, the first defect arrangement part 1 is a 15mm long surface crack, a second defect arrangement part 2 is arranged on a notch surface of the T91 material 5 side, the second defect arrangement part 2 is not fused and has a length of 15mm, and is used for verifying that when a phased array ultrasonic detection is used for detecting dissimilar steel on the T91 material 5 side, the characteristics of the non-fused defect echo on the T91 material 5 side are distinguished from the dissimilar steel grain boundary echo, a third defect arrangement part 3 is arranged on a notch surface of a TP347 material 6 side, the fusion length of the third defect arrangement part 3 is not 20mm, the non-fused defect detection capability of a stainless steel grain large side phased array method is verified, a fourth defect arrangement part 4 is arranged along the center line of a weld joint of a bottom surface, a crack 4 with a length of 20mm is arranged on the fourth defect arrangement part, the discovery capability of the bottom surface crack is verified, and the detection capability of the phased array method is compared with the bottom surface high residual echo, the difference between the two is summarized, the defects of the butt welding seam of the dissimilar steel can be better found, the ultrasonic phased array ultrasonic detection technology is used for carrying out comprehensive coverage detection on the welding seam, the on-site conventional ultrasonic detection and ray detection equipment is replaced, the on-site detection efficiency and the detection rate are improved, the ultrasonic phased array probe, the instrument and the software technology are used for controlling the ultrasonic sound beam to cover the detected material and generate a discontinuous detection image in the detected material, and compared with the conventional ultrasonic detection technology, the phased array detection technology is characterized in that the time delay of each independent array element is controlled, the ultrasonic wave beams with different directivities can be generated, different forms of sound beam effects can be generated, the work of various oblique focusing probes can be simulated, the electronic scanning and dynamic focusing can be realized, the probe does not need or needs to be moved a little, the detection speed is high, the complete image of the detected object can be generated by placing the probe at one position, the electronic automatic scanning is realized, and the object with a complicated shape can be detected; the technology is free of radiation and pollution, can be suitable for multiple kinds of three-dimensional crossing operation sites, and solves the problem that other personnel all need to be safely avoided due to the adoption of ray detection.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. The utility model provides a boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block, includes pipeline (100), its characterized in that still includes: the pipeline comprises a first defect arrangement part (1), a second defect arrangement part (2), a third defect arrangement part (3), a fourth defect arrangement part (4), a T91 material (5) and a TP347 material (6), wherein the T91 material (5) is arranged at one end of the pipeline (100), and the TP347 material (6) is arranged at the other end of the pipeline (100).
2. The boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block according to claim 1, wherein a first defect arrangement part (1) is arranged at a weld line of a side weld of the T91 material (5), and the first defect arrangement part (1) is a 15mm long surface crack.
3. The boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block according to claim 1, wherein a second defect arrangement part (2) is arranged on a side slope surface of the T91 material (5), and the unfused length of the second defect arrangement part (2) is 15mm.
4. The boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block according to claim 1, wherein a third defect arrangement part (3) is arranged on a side slope surface of the TP347 material (6), and the third defect arrangement part (3) is 20mm in unfused length.
5. The simulation test block for the butt weld of the boiler heating surface T91 and TP347 dissimilar steels according to claim 1, wherein a fourth defect arrangement part (4) is arranged along the center line of the bottom surface of the weld, and the fourth defect arrangement part (4) is a crack with the length of 20mm.
6. The boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block according to claim 1, wherein the first defect arrangement position (1), the second defect arrangement position (2), the third defect arrangement position (3) and the fourth defect arrangement position (4) are distributed at equal intervals along the circumferential direction of a pipeline (100) by 360 degrees.
7. The simulation test block for the butt weld of the T91 and TP347 dissimilar steels on the heating surface of the boiler according to claim 1, wherein the specification of the pipeline (100) is 60 x 8mm, and the length of the pipeline (100) is 200mm.
8. The boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block according to claim 1, wherein a welding wire between the T91 material (5) and the TP347 material (6) is a nickel-based welding wire.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221186240.1U CN217688725U (en) | 2022-05-17 | 2022-05-17 | Boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221186240.1U CN217688725U (en) | 2022-05-17 | 2022-05-17 | Boiler heating surface T91 and TP347 dissimilar steel butt weld simulation test block |
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| CN217688725U true CN217688725U (en) | 2022-10-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577420A (en) * | 2023-05-22 | 2023-08-11 | 天津诚信达金属检测技术有限公司 | Manufacturing method of unfused defect of special dissimilar steel welding joint simulation test block for thermal power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577420A (en) * | 2023-05-22 | 2023-08-11 | 天津诚信达金属检测技术有限公司 | Manufacturing method of unfused defect of special dissimilar steel welding joint simulation test block for thermal power |
| CN116577420B (en) * | 2023-05-22 | 2024-03-19 | 天津诚信达金属检测技术有限公司 | Manufacturing method of unfused defect of special dissimilar steel welding joint simulation test block for thermal power |
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