CN219736975U - High-temperature alloy welding crack test sample - Google Patents
High-temperature alloy welding crack test sample Download PDFInfo
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- CN219736975U CN219736975U CN202320167969.2U CN202320167969U CN219736975U CN 219736975 U CN219736975 U CN 219736975U CN 202320167969 U CN202320167969 U CN 202320167969U CN 219736975 U CN219736975 U CN 219736975U
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- groove
- welding
- tube seat
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- 238000003466 welding Methods 0.000 title claims abstract description 73
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 14
- 239000000956 alloy Substances 0.000 title claims abstract description 14
- 230000007704 transition Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 5
- 229910000601 superalloy Inorganic materials 0.000 claims 4
- 239000000463 material Substances 0.000 abstract description 18
- 230000035945 sensitivity Effects 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The utility model discloses a high-temperature alloy welding crack test sample, which comprises an arc-shaped plate and a tube seat, wherein the middle part of the arc-shaped plate is provided with a groove; a positioning groove is formed in the inner center of the groove, and the welding end of the tube seat is arranged in the positioning groove; the groove comprises a groove platform, a transition fillet and an inclined groove which are sequentially positioned on the radial outer side of the positioning groove, and the welding end of the tube seat is fixedly connected with the arc plate through welding seams in the groove and the root of the tube seat. The utility model can reflect the welding crack characteristics of the material when the material is manufactured into a specific product structure, has the advantages of simple and convenient processing and easy implementation, does not need a specific test device for judging the welding crack sensitivity, can accurately reflect the welding crack sensitivity, and effectively judges the feasibility of manufacturing the boiler product by the material.
Description
Technical Field
The utility model relates to a welding crack test sample, in particular to a high-temperature alloy welding crack test sample for a boiler with a parameter exceeding 650 ℃.
Background
The high-temperature alloy is considered to be the most potential material for manufacturing critical components such as a high-temperature heating surface and a header of a supercritical boiler with 650 ℃ and higher parameters due to the excellent high-temperature mechanical property, corrosion resistance and good cold and hot processing property. However, because the alloy contains high alloy content and large linear expansion coefficient, and other characteristics, the welding hot cracks are easy to generate and the crack defects such as stress cracks are eliminated when the alloy is welded, so that the sensitivity of the welding cracks is usually required to be obtained before the product is manufactured and welded so as to master the sensitivity of the welding cracks, and the welding and heat treatment processes are reasonably formulated; meanwhile, the feasibility of the material for manufacturing boiler products can be effectively judged. However, most of the existing welding crack test methods are summarized on the basis of material tests of carbon steel, low alloy steel and the like, are not suitable for crack tests of high temperature alloy, and most of the methods suitable for the crack tests of the high temperature alloy need a specific test device, and are all made into small samples with specific dimensions for test, and the test results only can reflect the welding characteristics of materials per se, but cannot reflect the welding crack characteristics when the materials are made into specific product structures, so that the test results cannot guide actual production well.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a high-temperature alloy welding crack test sample which can reflect the welding crack characteristics of a material when the material is manufactured into a specific product structure, has the advantages of simple and convenient processing and easy implementation, does not need a specific test device for judging the welding crack sensitivity, can accurately reflect the welding crack sensitivity, and effectively judges the feasibility of manufacturing boiler products by the material.
In order to achieve the aim, the high-temperature alloy welding crack test sample comprises an arc-shaped plate and a tube seat, wherein a groove is formed in the middle of the arc-shaped plate; the method is characterized in that: a positioning groove is formed in the inner center of the groove, and the welding end of the tube seat is arranged in the positioning groove; the groove comprises a groove platform, a transition fillet and an inclined groove which are sequentially positioned on the radial outer side of the positioning groove, and the welding end of the tube seat is fixedly connected with the arc plate through welding seams in the groove and the root of the tube seat.
According to the utility model, arc plates and tube seats are adopted for welding, a widely used barrel and tube seats in a boiler are simulated, a metallographic examination sample (the number of samples or the number of detection surfaces is not less than 4) is taken at intervals along the circumferential direction of the tube seats, macroscopic and microscopic metallographic examination is carried out on the cross sections of welding seams on two sides of each sample, whether cracks exist in the welding seams and heat affected zones on two sides are observed, the characteristics of the welding cracks are observed when a reaction material is manufactured into a specific product structure, a specific test device is not needed for judging the sensitivity of the welding cracks, and the sample has the advantages of simplicity and convenience in processing and easiness in implementation; the welding end of the tube seat is arranged in the positioning groove, so that deformation can be prevented during welding, the regularity of welding seams is ensured, the welding stress is released in the welding seams, the sensitivity of welding cracks can be accurately reflected, and the feasibility of manufacturing boiler products by the material is effectively judged;
as a further improvement of the utility model, the depth h1 of the positioning groove is 0.5-3mm, the groove depth h satisfies S is less than or equal to h and less than or equal to delta/2, h is less than or equal to 20mm, S is the wall thickness of the tube seat, and the wall thickness delta of the arc plate is more than or equal to 30mm; the depth of the positioning groove and the depth of the groove are properly selected according to the welding process, the thickness of the arc-shaped plate is larger, the welding deformation is further limited, and the welding crack sensitivity of the sample is more accurately reflected;
as a further improvement of the utility model, the length and the width of the arc-shaped plate are both 100mm larger than the outer diameter of the tube seat, and the height H of the tube seat is more than or equal to 50mm; the arc-shaped plate is larger in length, width and tube seat height, so that the sample contains a wider heat affected zone and the sensitivity of welding cracks is accurately reflected;
as a further improvement of the utility model, the angle alpha of the inclined groove is more than or equal to 30 degrees, and the transition fillet R is 2.5-10mm; the fusion of the welding seams is facilitated;
as a further improvement of the utility model, the outer diameter of the groove platform is 4-10mm larger than the diameter of the positioning groove; welding is facilitated, and the penetration of welding is ensured;
in summary, the utility model can reflect the welding crack characteristics of the material when the material is manufactured into a specific product structure, has the advantages of simple and convenient processing and easy implementation, does not need a specific test device for judging the welding crack sensitivity, can accurately reflect the welding crack sensitivity, and effectively judges the feasibility of manufacturing the boiler product by the material.
Drawings
Fig. 1 is a front view of an embodiment of the present utility model.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a cross-sectional view A-A of fig. 1.
Fig. 4 is a B-B cross-sectional view of fig. 2.
Fig. 5 is a front view of the arcuate plate of fig. 3.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
As shown in figures 1 to 5, the high-temperature alloy welding crack test sample in the embodiment comprises an arc-shaped plate 1 and a tube seat 2, wherein the length L and the width W of the arc-shaped plate are 100mm larger than the outer diameter d1 of the tube seat, and the height H of the tube seat is more than or equal to 50mm; the middle part of the arc-shaped plate 1 is provided with a groove; a positioning groove 3 is formed in the inner center of the groove, and the welding end of the tube seat 2 is arranged in the positioning groove 3; the groove comprises a groove platform 4, a transition fillet 5 and a slope opening 6 which are sequentially positioned on the radial outer side of a positioning groove 3, wherein the depth h1 of the positioning groove 3 is 0.5-3mm, the groove depth h is more than or equal to S and less than or equal to h and delta/2, h is less than or equal to 20mm, S is the wall thickness of a tube seat, the wall thickness delta of an arc plate 1 is more than or equal to 30mm, the outer diameter d3 of the groove platform 4 is 4-10mm larger than the diameter d2 of the positioning groove 3, the bevel angle alpha is more than or equal to 30 degrees, and the transition fillet R is 2.5-10mm; the welding end of the tube seat 2 is fixedly connected with the arc plate 1 through a welding line 7 in the groove and at the root of the tube seat.
According to the utility model, the arc-shaped plate 1 and the tube seat 2 are adopted for welding, a widely used barrel and tube seat in a boiler are simulated, a metallographic examination sample (the number of samples or the number of detection surfaces is not less than 4) is taken at intervals along the circumferential direction of the tube seat after welding, macroscopic and microscopic metallographic examination is carried out on the cross sections of welding seams on two sides of each sample, whether cracks exist in the welding seams and heat affected zones on two sides are observed, the characteristics of welding cracks are observed when a reaction material is manufactured into a specific product structure, a specific test device is not needed for judging the sensitivity of the welding cracks, and the sample has the advantages of simplicity and convenience in processing and easiness in implementation; the welding end of the tube seat 2 is arranged in the positioning groove 3, so that deformation is prevented during welding, the wall thickness delta of the arc plate is large, welding deformation is further limited, the regularity of the welding line 7 is ensured, the welding stress is released in the welding line 7, the sensitivity of welding cracks can be accurately reflected, and the feasibility of manufacturing a boiler product by the material is effectively judged; the welding crack sensitivity of the sample is reflected more accurately; the arc-shaped plate is larger in length L, width W and tube seat height H, so that the sample contains a wider heat affected zone, and the welding crack sensitivity of the sample is further accurately reflected;
the proper angle alpha of the slope opening and the transition fillet R are beneficial to fusion of welding seams; the outer diameter of the groove platform 4 is 4-10mm larger than the diameter of the positioning groove 3, which is beneficial to welding and ensures the penetration of welding.
Claims (5)
1. A high-temperature alloy welding crack test sample comprises an arc-shaped plate and a tube seat, wherein a groove is formed in the middle of the arc-shaped plate; the method is characterized in that: a positioning groove is formed in the inner center of the groove, and the welding end of the tube seat is arranged in the positioning groove; the groove comprises a groove platform, a transition fillet and an inclined groove which are sequentially positioned on the radial outer side of the positioning groove, and the welding end of the tube seat is fixedly connected with the arc plate through welding seams in the groove and the root of the tube seat.
2. A superalloy weld crack test specimen according to claim 1 wherein: the depth h1 of the positioning groove is 0.5-3mm, the groove depth h is more than or equal to S and less than or equal to delta/2, h is less than or equal to 20mm, S is the wall thickness of the tube seat, and the wall thickness delta of the arc-shaped plate is more than or equal to 30mm.
3. A superalloy weld crack test specimen according to claim 1 or 2 wherein: the length and the width of the arc-shaped plate are both 100mm larger than the outer diameter of the tube seat, and the height H of the tube seat is more than or equal to 50mm.
4. A superalloy weld crack test specimen according to claim 3 wherein: the angle alpha of the slope opening is more than or equal to 30 degrees, and the transition fillet R is 2.5-10mm.
5. A superalloy weld crack test specimen according to claim 4 wherein: the outer diameter of the groove platform is 4-10mm larger than the diameter of the positioning groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320167969.2U CN219736975U (en) | 2023-02-09 | 2023-02-09 | High-temperature alloy welding crack test sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320167969.2U CN219736975U (en) | 2023-02-09 | 2023-02-09 | High-temperature alloy welding crack test sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219736975U true CN219736975U (en) | 2023-09-22 |
Family
ID=88032548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320167969.2U Active CN219736975U (en) | 2023-02-09 | 2023-02-09 | High-temperature alloy welding crack test sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219736975U (en) |
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2023
- 2023-02-09 CN CN202320167969.2U patent/CN219736975U/en active Active
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