CN112051324A - Welding seam eddy current flaw detection check test block and manufacturing method thereof - Google Patents
Welding seam eddy current flaw detection check test block and manufacturing method thereof Download PDFInfo
- Publication number
- CN112051324A CN112051324A CN202011003700.8A CN202011003700A CN112051324A CN 112051324 A CN112051324 A CN 112051324A CN 202011003700 A CN202011003700 A CN 202011003700A CN 112051324 A CN112051324 A CN 112051324A
- Authority
- CN
- China
- Prior art keywords
- test block
- welding seam
- eddy current
- welding
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/04—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of metal, e.g. skate blades
Abstract
The invention relates to the technical field of flaw detection, in particular to a welding seam eddy current flaw detection checking test block which comprises a test block body, wherein the test block body comprises a base material area, a welding seam area and a plurality of crack structures, the base material area comprises a first test block and a second test block, a first beveled opening is formed in one side of the first test block, a second beveled opening is formed in one side of the second test block, the welding seam area is arranged between the first beveled opening and the second beveled opening, and the plurality of crack structures are arranged in the welding seam area. According to the invention, the material which is consistent with the material of the part to be detected is selected as the detection test block, so that the crack structure on the part to be detected is simulated, the detection error is greatly reduced, and the accuracy of the detection data is higher.
Description
Technical Field
The invention relates to the technical field of flaw detection, in particular to a welding seam eddy current flaw detection check test block and a manufacturing method thereof.
Background
Eddy current inspection instruments must use a proof mass to verify the performance of the instrument before use. At present, the performance verification test block of the eddy current flaw detection equipment is manufactured by the technologies of laser grooving, cutting grooving and the like, but the manufacturing method has the following defects:
1. the processing cost is high;
2. the material difference between the actual detected material and the checking test block causes the generation of detection error.
Disclosure of Invention
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The invention aims to overcome the defects and provide the welding seam eddy current flaw detection checking test block with small detection error and low cost.
In order to achieve the purpose, the technical solution of the invention is as follows: the utility model provides a welding seam eddy current inspection detects check-up test block, includes the inspection test block body, the inspection test block body includes parent metal district, welding seam district and a plurality of crackle structure, the parent metal district includes first inspection test block and second inspection test block, one side of first inspection test block is provided with first grooving, one side of second inspection test block is provided with the second grooving, the welding seam district sets up first grooving with between the second grooving, a plurality of crackle structure sets up in the welding seam district.
Preferably, the inclination angle of the first beveling is 0-60 degrees, and the inclination angle of the second beveling is 0-60 degrees.
Preferably, the inclination angle of the first beveling is 30 degrees, the inclination angle of the second beveling is 30 degrees, and then the first test block, the second test block and the welding zone form a plane welding line test block body together.
Preferably, the inclination angle of the first beveling is 30 degrees, the inclination angle of the second beveling is 0 degrees, and then the first inspection test block, the second inspection test block and the weld zone together form a T-shaped weld joint inspection test block body.
Preferably, the materials of the first test block and the second test block are consistent with the material of the part to be detected, so that the detection error is reduced.
The invention also provides a manufacturing method of the welding seam eddy current flaw detection check test block, which comprises the following steps:
s1, selecting materials: selecting materials consistent with the material of the part to be detected as a first detection test block and a second detection test block;
s2, groove machining: processing one corresponding side of the first test block and one corresponding side of the second test block respectively to form a first beveling end and a second beveling end;
s3, welding: welding a welding seam area between the first groove and the second groove;
s4, cooling: after welding, immediately immersing the steel plate into ice water for cooling to form a crack structure;
s5, knocking: knocking the residual height part of the crack structure to form a flat crack structure;
s6, polishing: and polishing the flat crack structure, removing burrs and forming a vortex welding seam eddy current flaw detection check test block body.
Preferably, the inclination angle of the first beveling and the second beveling in step S2 is 0 to 60 °.
Preferably, the temperature of the ice water in the step S4 is 0-4 ℃.
Preferably, the cooling time in step S4 is 10-30 min.
The principle of forming cracks in the manufacturing process of the invention is as follows: after welding, the checking test block in a high-temperature state is put into ice water for rapid cooling, and because the temperature difference between a welding seam area and a base material area and the flowability of crystal grains are different, the shrinkage rate of the base material area is much smaller than that of the welding seam area under the drive of thermal expansion and cold contraction force, so that the crystal grains in the welding seam area are pulled apart into an opening along a grain boundary under the pulling of shrinkage stress, and the crack is represented as a crack on a macroscopic level. In addition, another principle of cracking the test block is to utilize the hydrogen embrittlement principle of steel materials, wherein the hydrogen sources mainly include two points: firstly, at high welding temperature, hydrogen ions in the welding rod and the coating are dissolved in the check test block. Secondly, after welding, the high-temperature test block enters into ice water, and hydrogen ions in the water quickly diffuse into gaps of metal lattices under a large temperature difference. Along with the reduction of the temperature, the solubility of hydrogen ions in the weld zone of the test block is reduced, the hydrogen ions are gathered together to form hydrogen to be released, a certain high pressure is generated, so that a hardened structure is formed in the weld zone, and finally, a crack structure is generated in the weld zone under the knocking of an external force.
By adopting the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the material which is consistent with the material of the part to be detected is selected as the detection test block, so that the crack structure on the part to be detected is simulated, the detection error is greatly reduced, and the accuracy of the detection data is higher.
2. After welding, the steel plate is immediately put into ice water for rapid cooling, and the shrinkage rate of the base material area is much smaller than that of the welding seam area under the drive of thermal expansion and cold contraction force because of the temperature difference between the welding seam area and the base material area and the different flowability of crystal grains, so that the welding seam area is easy to generate a crack structure under the pull of shrinkage stress, a laser grooving instrument or a machining grooving instrument is not required to be purchased for manufacturing, and the manufacturing cost is greatly reduced.
3. During welding, hydrogen ions in the welding rod and the coating are dissolved in the checking test block at high temperature, the hydrogen ions are dissolved in the checking test block after welding, the hydrogen ions decomposed in water vapor can also enter the checking test block, the solubility of the hydrogen ions is reduced along with the reduction of the temperature, the hydrogen is released and gathered together to generate certain high pressure, hardening tissues are formed in a welding seam area, and finally, a crack structure is generated in the welding seam area.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Clearly, such objects and other objects of the present invention will become more apparent from the detailed description of the preferred embodiments hereinafter set forth in the various drawings and drawings.
These and other objects, features and advantages of the present invention will become more apparent from the following detailed description of one or more preferred embodiments of the invention, as illustrated in the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings, like parts are designated with like reference numerals, and the drawings are schematic and not necessarily drawn to scale.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only one or several embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to such drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a structural view of embodiment 3-4 of the present invention;
fig. 3 is a pictorial view of the present invention.
Description of the main reference numerals: (1, a base material area; 11, a first checking test block; 12, a second checking test block; 13, a first groove; 14, a second groove; 2, a welding seam area; 3, a crack structure).
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
Example 1
Referring to fig. 1, a welding seam eddy current flaw detection check test block, including the inspection test block body, the inspection test block body includes base metal district 1, welding seam district 2 and a plurality of crack structure 3, base metal district 1 includes first inspection test block 11 and second inspection test block 12, one side of first inspection test block 11 is provided with first grooving 13, one side of second inspection test block 12 is provided with second grooving 14, welding seam district 2 sets up between first grooving 13 and second grooving 14, a plurality of crack structure 3 sets up in welding seam district 2.
The inclination angle of the first beveling 13 is 30 degrees, the inclination angle of the second beveling 14 is 30 degrees, and then the first inspection test block 11, the second inspection test block 12 and the welding seam area 2 form a plane welding seam inspection test block body together.
The materials of the first test block 11 and the second test block 12 are consistent with those of the part to be detected, so that the detection error is reduced.
The embodiment also provides a manufacturing method of the welding seam eddy current flaw detection check test block, which comprises the following steps:
s1, selecting materials: selecting materials consistent with the material of the part to be detected as a first detection test block 11 and a second detection test block 12;
s2, groove machining: processing one corresponding side of the first test block 11 and the second test block 12 respectively to form a first beveling 13 and a second beveling 14;
s3, welding: welding a welding seam area 2 between the first beveling 13 and the second beveling 14;
s4, cooling: after welding, immediately immersing the steel plate into ice water for cooling to form a crack structure 3;
s5, knocking: knocking the residual height part of the crack structure to form a flat crack structure 3;
s6, polishing: and polishing the flat crack structure 3, and removing burrs to form a vortex welding seam eddy current flaw detection check test block body.
In step S2, the inclination angles of the first beveling 13 and the second beveling 14 are 0 to 60 °.
The temperature of the ice water in step S4 was 1 ℃.
The cooling time in step S4 was 10 min.
Referring to fig. 3, the principle of forming cracks in the manufacturing process of this embodiment is as follows: after welding, the checking test block in a high-temperature state is put into ice water for rapid cooling, and because the temperature difference between the welding seam area 2 and the base material area 1 and the flowability of crystal grains are different, the shrinkage rate of the base material area 1 is much smaller than that of the welding seam area 2 under the drive of thermal expansion and cold contraction force, so that the crystal grains in the welding seam area 2 are pulled along a grain boundary to form a gap, and the crack is represented as a crack on a macroscopic level. In addition, another principle of cracking the test block is to utilize the hydrogen embrittlement principle of steel materials, wherein the hydrogen sources mainly include two points: firstly, at high welding temperature, hydrogen ions in the welding rod and the coating are dissolved in the check test block. Secondly, after welding, the high-temperature test block enters into ice water, and hydrogen ions in the water quickly diffuse into gaps of metal lattices under a large temperature difference. Along with the reduction of the temperature, the solubility of hydrogen ions in the welding seam area 2 of the test block is reduced, the hydrogen ions are gathered together to form hydrogen gas to be released, a certain high pressure is generated, so that a hardened structure is formed in the welding seam area 2, and finally, a crack structure 3 is generated in the welding seam area 2 under the knocking of an external force.
Example 2
Referring to fig. 2, a welding seam eddy current flaw detection check test block, including the inspection test block body, the inspection test block body includes base metal district 1, welding seam district 2 and a plurality of crack structure 3, base metal district 1 includes first inspection test block 11 and second inspection test block 12, one side of first inspection test block 11 is provided with first grooving 13, one side of second inspection test block 12 is provided with second grooving 14, welding seam district 2 sets up between first grooving 13 and second grooving 14, a plurality of crack structure 3 sets up in welding seam district 2.
The inclination angle of the first beveling 13 is 30 degrees, the inclination angle of the second beveling 14 is 0 degrees, and then the first inspection test block 11, the second inspection test block 12 and the welding seam area 2 form a T-shaped welding seam inspection test block body together.
The materials of the first test block 11 and the second test block 12 are consistent with those of the part to be detected, so that the detection error is reduced.
The embodiment also provides a manufacturing method of the welding seam eddy current flaw detection check test block, which comprises the following steps:
s1, selecting materials: selecting materials consistent with the material of the part to be detected as a first detection test block 11 and a second detection test block 12;
s2, groove machining: processing one corresponding side of the first test block 11 and the second test block 12 respectively to form a first beveling 13 and a second beveling 14;
s3, welding: welding a welding seam area 2 between the first beveling 13 and the second beveling 14;
s4, cooling: after welding, immediately immersing the steel plate into ice water for cooling to form a crack structure 3;
s5, knocking: knocking the residual height part of the crack structure 3 to form a flat crack structure 3;
s6, polishing: and polishing the flat crack structure 3, and removing burrs to form a vortex welding seam eddy current flaw detection check test block body.
In step S2, the inclination angles of the first beveling 13 and the second beveling 14 are 0 to 60 °.
The temperature of the ice water in step S4 was 1 ℃.
The cooling time in step S4 was 30 min.
Referring to fig. 3, the principle of forming cracks in the manufacturing process of this embodiment is as follows: after welding, the checking test block in a high-temperature state is put into ice water for rapid cooling, and because the temperature difference between the welding seam area 2 and the base material area 1 and the flowability of crystal grains are different, the shrinkage rate of the base material area 1 is much smaller than that of the welding seam area 2 under the drive of thermal expansion and cold contraction force, so that the crystal grains in the welding seam area 2 are pulled along a grain boundary to form a gap, and the crack is represented as a crack on a macroscopic level. In addition, another principle of cracking the test block is to utilize the hydrogen embrittlement principle of steel materials, wherein the hydrogen sources mainly include two points: firstly, at high welding temperature, hydrogen ions in the welding rod and the coating are dissolved in the check test block. Secondly, after welding, the high-temperature test block enters into ice water, and hydrogen ions in the water quickly diffuse into gaps of metal lattices under a large temperature difference. Along with the reduction of the temperature, the solubility of hydrogen ions in the welding seam area 2 of the test block is reduced, the hydrogen ions are gathered together to form hydrogen gas to be released, a certain high pressure is generated, so that a hardened structure is formed in the welding seam area 2, and finally, a crack structure 3 is generated in the welding seam area 2 under the knocking of an external force.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular process steps or materials disclosed herein, but rather, are extended to equivalents thereof as would be understood by those of ordinary skill in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "an embodiment" means that a particular feature, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
Furthermore, the described features or characteristics may be combined in any other suitable manner in one or more embodiments. In the above description, certain specific details are provided, such as thicknesses, amounts, etc., to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth.
Claims (9)
1. The utility model provides a welding seam eddy current inspection check-up test block which characterized in that, includes the inspection test block body, the inspection test block body includes:
the device comprises a base material area and a base material area, wherein the base material area comprises a first test block and a second test block, a first groove is formed in one side of the first test block, and a second groove is formed in one side of the second test block;
a weld zone disposed between the first and second bevels;
a number of crack structures disposed within the weld zone.
2. The test block for eddy current testing and verification of weld according to claim 1, wherein the first beveled edge has an inclination angle of 0 to 60 ° and the second beveled edge has an inclination angle of 0 to 60 °.
3. The eddy current flaw detection proof test block for a weld according to claim 2, wherein the first beveled edge is inclined at an angle of 30 ° and the second beveled edge is inclined at an angle of 30 °.
4. The eddy current flaw detection proof test block for a weld according to claim 2, wherein the first beveled edge is inclined at an angle of 30 ° and the second beveled edge is inclined at an angle of 0 °.
5. The weld eddy current inspection proof test block of claim 1, wherein the first and second test blocks are made of the same material as the component to be inspected.
6. A method for manufacturing the eddy current testing proof test block for the welding seam according to any one of the claims 1 to 5, which comprises the following steps:
s1, selecting materials: selecting materials consistent with the material of the part to be detected as a first detection test block and a second detection test block;
s2, groove machining: processing one corresponding side of the first test block and one corresponding side of the second test block respectively to form a first beveling end and a second beveling end;
s3, welding: welding a welding seam area between the first groove and the second groove;
s4, cooling: after welding, immediately immersing the steel plate into ice water for cooling to form a crack structure;
s5, knocking: knocking the residual height part of the crack structure to form a flat crack structure;
s6, polishing: and polishing the flat crack structure, removing burrs and forming a vortex welding seam eddy current flaw detection check test block body.
7. The method for manufacturing the test block for eddy current testing and checking of the welding seam according to claim 6, wherein the inclination angle of the first and second bevels in step S2 is 0-60 °.
8. The method for manufacturing the test block for the eddy current testing and checking of the welding seam according to claim 6, wherein the temperature of the ice water in the step S4 is 0-4 ℃.
9. The method for manufacturing the test block for the eddy current testing and checking of the welding seam according to claim 6, wherein the cooling time in the step S4 is 10-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011003700.8A CN112051324A (en) | 2020-09-22 | 2020-09-22 | Welding seam eddy current flaw detection check test block and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011003700.8A CN112051324A (en) | 2020-09-22 | 2020-09-22 | Welding seam eddy current flaw detection check test block and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112051324A true CN112051324A (en) | 2020-12-08 |
Family
ID=73604344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011003700.8A Pending CN112051324A (en) | 2020-09-22 | 2020-09-22 | Welding seam eddy current flaw detection check test block and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112051324A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114559206A (en) * | 2022-04-06 | 2022-05-31 | 天津市英源焊接技术有限公司 | Repairing method for repairing, welding and reinforcing cracks of engine room chassis of wind generating set |
-
2020
- 2020-09-22 CN CN202011003700.8A patent/CN112051324A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114559206A (en) * | 2022-04-06 | 2022-05-31 | 天津市英源焊接技术有限公司 | Repairing method for repairing, welding and reinforcing cracks of engine room chassis of wind generating set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110991104B (en) | Wind-induced multi-shaft high-cycle fatigue damage assessment method for welded space grid node weld joints | |
| KR20200016236A (en) | Method and apparatus for testing material samples in standard tests for evaluating in-plane fracture toughness | |
| CN112051324A (en) | Welding seam eddy current flaw detection check test block and manufacturing method thereof | |
| CN212845173U (en) | Check-up test block for eddy current flaw detection of welding seam | |
| CN107764721A (en) | Metal material delayed crack sensitivity evaluation method | |
| CN110836798B (en) | Large-size structural type sample, manufacturing method thereof and method for performing crack arrest test by using sample | |
| JP5754242B2 (en) | Use limit prediction method of steel structure | |
| Shlyannikov et al. | Failure analysis of an aircraft GTE compressor disk on the base of imitation modeling principles | |
| Mukherjee | Laboratory fatigue evaluation of a full scale steel orthotropic bridge deck with round bottom ribs and fitted floor beams | |
| CN110877699B (en) | Method for welding reinforcing ribs on reverse side of LNG ship cargo tank hull | |
| Samadian et al. | Elastic-plastic defect interaction in (a) symmetrical double edge notched tension specimens | |
| Keating et al. | Effects of bending and heat on the ductility and fracture toughness of flange plate. | |
| MIKI et al. | An analysis of fatigue crack growth from blowholes in longitudinal welded joints | |
| CN114813332B (en) | Pipeline steel pipe ring-welded joint softening fit usability evaluation method based on bending strain | |
| CN114799722B (en) | Quick repairing method for local stress corrosion defect of pressure vessel | |
| Shimizu et al. | Effect of different modes on fracture prediction using Weibull Stress to predict brittle fracture from defects at beam-to-column connections | |
| Fanny et al. | New Crack Arresting Methodology Using Structural Optimizing Technique. | |
| CN114813416B (en) | Method for evaluating soft chemical combination and usability of girth welded joint in service stage of pipeline steel pipe | |
| Li | Sequencing & Agglomeration of Cycles in Variable Amplitude Underload Spectra: Effects on Surface Crack Growth in a Near-neutral pH Environment | |
| Riise et al. | Experimental assessment of cracked tubular joints repaired with crack-deflecting holes and weld-toe grinding | |
| JP2012112803A (en) | Technique for predicting use limit of steel structure | |
| CN115609175A (en) | Method for evaluating fatigue behavior of welding joint | |
| Liu et al. | Implementation of XFEM for Fitness-For-Service Assessments in Life Extension and Damaged Structure Applications | |
| CN117744429A (en) | Magnetic memory signal characteristic analysis method for pipeline welding seam | |
| Akahoshi et al. | Study on Establish a Brittle Fracture Prediction Considering Different Crack Opening Modes Using Mixed-Mode Ratio. Appl. Mech. 2021, 2, 849–862 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |