CN109239197A - The difference detection method when ultrasonic diffraction of straight tube and elbow banjo fixing butt jointing - Google Patents
The difference detection method when ultrasonic diffraction of straight tube and elbow banjo fixing butt jointing Download PDFInfo
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- CN109239197A CN109239197A CN201811122411.2A CN201811122411A CN109239197A CN 109239197 A CN109239197 A CN 109239197A CN 201811122411 A CN201811122411 A CN 201811122411A CN 109239197 A CN109239197 A CN 109239197A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
- G01N29/069—Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique
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Abstract
The present invention provides difference detection methods when the ultrasonic diffraction of a kind of straight tube and elbow banjo fixing butt jointing, belong to weld seam detection field, comprising steps of determining that initially the acoustic beam central of probe spacing and transmitting probe is away from the distance of axis of a weld according to preset condition；Transmitting probe and receiving transducer are placed in weld seam the same side, carry out scanning；Flaw size is obtained according to scanning image.The difference detection method when ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing, utilize ultrasonic wave diffraction time difference detection technique, and scanning can be carried out in weld seam unilateral side, only two probes need to be arranged in straight tube side, it can be realized the unilateral scanning mode of the ultrasonic wave diffraction time difference detection of straight tube and bend pipe banjo fixing butt jointing position, and then improve the detection accuracy of straight tube and bend pipe banjo fixing butt jointing position.
Description
Technical field
The invention belongs to weld seam detection technical fields, more specifically, are related to a kind of straight tube and elbow banjo fixing butt jointing
Difference detection method when ultrasonic diffraction.
Background technique
Ultrasonic wave diffraction time difference detection technique (TOFD) using increasingly extensive, TOFD is main compared with other detection methods
Wanting advantage includes: that one, defect detection rate is high, and according to ASSOCIATE STATISTICS, the effective recall rate of defect is more than 90%, is more than other each side
Method；Two, insensitive to the angle of defect during detection, it is quantitatively the time based on diffracted signal rather than is based on signal
Wave amplitude；Three, there is very high quantitative accuracy, absolute error is about 1mm.TOFD detection for weld seam, need to be by two TOFD
Probe is respectively placed in weld seam two sides, and usually two probes are across weld seam, and sound beam direction is vertical with weld seam trend.However, for
The butt weld of pressure pipeline (straight tube) and elbow, since weld seam two sides base material is not contour or elbow side is the isostructural original in inclined-plane
Cause tends not to place TOFD probe in elbow side, to cannot achieve the TOFD detection of such weld seam.
Summary of the invention
The purpose of the present invention is to provide difference detection methods when the ultrasonic diffraction of a kind of straight tube and elbow banjo fixing butt jointing, with solution
The technical issues of TOFD detection cannot being carried out to straight tube and elbow banjo fixing butt jointing certainly existing in the prior art.
To achieve the above object, the technical solution adopted by the present invention is that: the super of a kind of straight tube and elbow banjo fixing butt jointing is provided
Difference detection method when sound diffraction, includes the following steps:
Determine that initially the acoustic beam central of probe spacing and transmitting probe is away from the distance of axis of a weld according to preset condition；
Transmitting probe and receiving transducer are placed in weld seam the same side, carry out scanning；
Flaw size is obtained according to scanning image.
Further, described to include: according to scanning image acquisition flaw size
Adjustment probe spacing, repeats scanning；
It determines and lacks according to time in scanning twice of upper diffraction endpoint and lower diffraction endpoint diffracted signal and probe spacing
Fall into length and defect width.
Further, time according to upper diffraction endpoint and lower diffraction endpoint diffracted signal in scanning twice and away from
The horizontal distance of transmitting probe determines defect length and defect width includes:
Determine defect upper extreme point away from sweeping according to time of the upper diffraction endpoint diffracted signal in scanning twice and probe spacing
Look into the depth in face and the horizontal distance away from transmitting probe；
Determine defect lower extreme point away from sweeping according to time of the lower diffraction endpoint diffracted signal in scanning twice and probe spacing
Look into the depth in face and the horizontal distance away from transmitting probe.
Further, the time and probe spacing according to upper diffraction endpoint diffracted signal in scanning twice determines and lacks
Fall into the formula of depth of the upper extreme point away from scanning face and the horizontal distance away from transmitting probe are as follows:
Wherein, c is the longitudinal wave velocity in material, tUpper 1For time of the upper diffraction endpoint diffracted signal in first time scanning,
tUpper 2For time of the upper diffraction endpoint diffracted signal in second of scanning, PCS1 is initial probe spacing, and PCS2 is to visit after adjusting
Head spacing；
Depth h of the defect upper extreme point away from scanning face is obtained according to formula (1) and formula (2)1And the level away from transmitting probe
Distance x1, also, h1< 0, x1> 0；
The time and probe spacing according to lower diffraction endpoint diffracted signal in scanning twice determines defect lower extreme point
The formula of depth away from scanning face and the horizontal distance away from transmitting probe are as follows:
Wherein, c is the longitudinal wave velocity in material, tLower 1For time of the lower diffraction endpoint diffracted signal in first time scanning,
tLower 2For time of the lower diffraction endpoint diffracted signal in second of scanning, PCS1 is initial probe spacing, and PCS2 is to visit after adjusting
Head spacing；
Depth h of the defect lower extreme point away from scanning face is obtained according to formula (3) and formula (4)2And the level away from transmitting probe
Distance x2, also, h2< 0, x2> 0；
Depth h according to defect upper extreme point away from scanning face1And depth h of the defect lower extreme point away from scanning face2Obtain defect length
Formula are as follows:
H=| h1-h2| (5)
Horizontal distance x according to defect upper extreme point away from transmitting probe1And horizontal distance x of the defect lower extreme point away from transmitting probe2
Obtain the formula of defect width are as follows:
W=| x1-x2| (6)。
Further, the acoustic beam central that pop one's head in spacing and transmitting probe are determined according to preset condition is away from axis of a weld
Distance include:
It is determined according to the half-angle of spread of weld width, thickness of workpiece, the half-angle of spread of transmitting probe and receiving transducer
The probe distance of spacing and transmitting probe away from axis of a weld.
Further, described that transmitting probe and receiving transducer are placed in weld seam the same side, after progress scanning further include:
Interpretation is carried out to scanning result, defect image is shown if not finding, completes to scan.
Further, the adjustment probe spacing, repeating scanning includes:
Interpretation is carried out to scanning result, if discovery defect image is shown, the spacing of transmitting probe and receiving transducer is hidden
Big or reduce default adjustment distance, the spacing that makes initially to pop one's head in becomes spacing of popping one's head in after adjusting, and repeats a scanning.
Further, the default adjustment distance is the 8%-12% of initial probe spacing.
Further, the default adjustment distance is the 10% of initial probe spacing.
Further, described that transmitting probe and receiving transducer are placed in weld seam the same side, carrying out scanning includes:
Transmitting probe and receiving transducer are mounted on scanning frame respectively, and are connected respectively with test host；
Scanning frame is placed on base material to be checked according to transmitting probe away from the distance value of axis of a weld；
Starting test host, adjusts separately the velocity of sound, time window, signal gain, encoder step parameter, carries out to weld seam
Scanning.
The beneficial effect of difference detection method is when the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing: with
The prior art is compared, the difference detection method when ultrasonic diffraction of straight tube of the present invention and elbow banjo fixing butt jointing, when using ultrasonic wave diffraction
Poor detection technique, and can weld seam unilateral side carry out scanning, only need to straight tube side arrange two probe, can be realized straight tube with
The unilateral scanning mode of the ultrasonic wave diffraction time difference detection of bend pipe banjo fixing butt jointing position, and then improve straight tube and bend pipe banjo fixing butt jointing
The detection accuracy of position.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the use state diagram of ultrasonic wave diffraction time difference detection device used in the embodiment of the present invention；
The principle of difference detection method when Fig. 2 is the ultrasonic diffraction of straight tube provided in an embodiment of the present invention and elbow banjo fixing butt jointing
Figure one；
The principle of difference detection method when Fig. 3 is the ultrasonic diffraction of straight tube provided in an embodiment of the present invention and elbow banjo fixing butt jointing
Figure two；
When Fig. 4 is the ultrasonic diffraction using straight tube provided in an embodiment of the present invention and elbow banjo fixing butt jointing difference detection method into
When row test, the scanning image that shows on test host.
Wherein, each appended drawing reference in figure:
1- straight tube；2- bend pipe；3- weld seam；4- crackle；5- transmitting probe；6- receiving transducer；7- incidence wave；8- diffracted wave；
9- acoustic beam edge；10- tests host；11- probe wire
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Also referring to Fig. 1 to Fig. 3, now the ultrasonic diffraction time difference of straight tube provided by the invention and elbow banjo fixing butt jointing is examined
Survey method is illustrated.The difference detection method when ultrasonic diffraction of the straight tube and elbow banjo fixing butt jointing, includes the following steps:
Determine that initially the acoustic beam central of probe spacing and transmitting probe is away from the distance of axis of a weld, energy according to preset condition
Enough ensure that ultrasonic acoustic can cover welded seam area to the maximum extent but also obtain signal-to-noise ratio high as far as possible；
Transmitting probe and receiving transducer are placed in weld seam the same side, carry out scanning；
Flaw size is obtained according to scanning image.
Test device is made of two probes, a transmitting effect of having popped one's head in, another reception effect of having popped one's head in, principle
It is that the position for calculating crackle is re-emitted by energy after ultrasonic wave diffraction.
The difference detection method when ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing, compared with prior art,
Using ultrasonic wave diffraction time difference detection technique, and scanning can be carried out in weld seam unilateral side, only need to arrange two spies in straight tube side
Head, can be realized the unilateral scanning mode of the ultrasonic wave diffraction time difference detection of straight tube and bend pipe banjo fixing butt jointing position, and then improve
The detection accuracy of straight tube and bend pipe banjo fixing butt jointing position.
A kind of specific reality of difference detection method when as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Mode is applied, obtaining flaw size according to scanning image includes:
Adjustment probe spacing, repeats scanning；
It determines and lacks according to time in scanning twice of upper diffraction endpoint and lower diffraction endpoint diffracted signal and probe spacing
Fall into length and defect width.
When test, transmitting probe is used as using little refraction angle probe, big refraction angle probe is used as receiving transducer.Due to using
Probe arrangement mode of the invention carries out the scanning of single side unilateral side, cannot receive straight-through wave and bottom as being detected conventional TOFD
Face echo-signal leads to not be accurately positioned defect, therefore by the way of double scannings, unique difference of scanning twice
It is only that the difference of probe spacing.
Referring to Fig. 4, difference detection method when as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
A kind of specific embodiment, according to time in scanning twice of upper diffraction endpoint and lower diffraction endpoint diffracted signal and away from transmitting
The horizontal distance of probe determines defect length and defect width includes:
Determine defect upper extreme point away from sweeping according to time of the upper diffraction endpoint diffracted signal in scanning twice and probe spacing
Look into the depth in face and the horizontal distance away from transmitting probe；
Determine defect lower extreme point away from sweeping according to time of the lower diffraction endpoint diffracted signal in scanning twice and probe spacing
Look into the depth in face and the horizontal distance away from transmitting probe.In Fig. 4, previous (left side) waveform is crackle upper prong diffracted signal,
The latter waveform (right side) is crackle lower prong diffracted signal.
When test, when, there are crack defect, the upper extreme point diffracted signal and lower extreme point diffracted signal of defect will divide in weld seam
It is not received probe to be received, scanning image as shown in Figure 4 is obtained.Relational expression used by testing are as follows:
Wherein, c is the longitudinal wave velocity in material；
T is the flaw indication time difference；
X is horizontal distance of the defect away from transmitting probe center；
H is the buried depth (distance of the defect away from scanning face) of defect；
PCS is two probe spacing.Eventually by solution binary quadratic equation group to realize the accurate positioning to defect.
One kind of difference detection method when specifically, as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Specific embodiment determines defect upper extreme point according to time of the upper diffraction endpoint diffracted signal in scanning twice and probe spacing
The formula of depth away from scanning face and the horizontal distance away from transmitting probe are as follows:
Wherein, c is the longitudinal wave velocity in material, tUpper 1For time of the upper diffraction endpoint diffracted signal in first time scanning,
tUpper 2For time of the upper diffraction endpoint diffracted signal in second of scanning, PCS1 is initial probe spacing, and PCS2 is to visit after adjusting
Head spacing；
Depth h of the defect upper extreme point away from scanning face is obtained according to formula (1) and formula (2)1And the level away from transmitting probe
Distance x1, also, h1< 0, x1> 0；
The time and probe spacing according to lower diffraction endpoint diffracted signal in scanning twice determines defect lower extreme point
The formula of depth away from scanning face and the horizontal distance away from transmitting probe are as follows:
Wherein, c is the longitudinal wave velocity in material, tLower 1For time of the lower diffraction endpoint diffracted signal in first time scanning,
tLower 2For time of the lower diffraction endpoint diffracted signal in second of scanning, PCS1 is initial probe spacing, and PCS2 is to visit after adjusting
Head spacing；
Depth h of the defect lower extreme point away from scanning face is obtained according to formula (3) and formula (4)2And the level away from transmitting probe
Distance x2, also, h2< 0, x2> 0；
Depth h according to defect upper extreme point away from scanning face1And depth h of the defect lower extreme point away from scanning face2Obtain defect length
Formula are as follows:
H=| h1-h2| (5)
Horizontal distance x according to defect upper extreme point away from transmitting probe1And horizontal distance x of the defect lower extreme point away from transmitting probe2
Obtain the formula of defect width are as follows:
W=| x1-x2| (6)。
A kind of specific reality of difference detection method when as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Mode is applied, the acoustic beam central for determining probe spacing and transmitting probe according to preset condition includes: away from the distance of axis of a weld
It is determined according to the half-angle of spread of weld width, thickness of workpiece, the half-angle of spread of transmitting probe and receiving transducer
The probe distance of spacing and transmitting probe away from axis of a weld.
The probe that test selects two refraction angles different cooperates, for example, big refraction angle (such as 60 degree) probe is selected to make
For ultrasonic wave receiving transducer, select little refraction angle probe (such as 20 degree) as transmitting probe, wherein transmitting probe is away from Weld pipe mill
The distance of line is expressed as L.Specific mode of choosing is referring to table 1.
The probe of 1 plate banjo fixing butt jointing of table is recommendatory to be select and set
A kind of specific reality of difference detection method when as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Mode is applied, to improve detection efficiency, transmitting probe and receiving transducer are placed in weld seam the same side, also wrapped after scanning
It includes:
Interpretation is carried out to scanning result, defect image is shown if not finding, completes to scan.
A kind of specific reality of difference detection method when as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Mode is applied, adjustment probe spacing, repeating scanning includes:
Interpretation is carried out to scanning result, if discovery defect image is shown, the spacing of transmitting probe and receiving transducer is hidden
Big or reduce default adjustment distance, the spacing that makes initially to pop one's head in becomes spacing of popping one's head in after adjusting, and repeats a scanning.
A kind of specific reality of difference detection method when as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Mode is applied, presets adjustment distance as the 8%-12% of initial probe spacing.
A kind of specific reality of difference detection method when as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Mode is applied, presets adjustment distance as the 10% of initial probe spacing.
A kind of specific reality of difference detection method when as the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Mode is applied, transmitting probe and receiving transducer are placed in weld seam the same side, carrying out scanning includes:
Transmitting probe and receiving transducer are mounted on scanning frame respectively, and are connected respectively with test host；
Scanning frame is placed on base material to be checked according to transmitting probe away from the distance value of axis of a weld；
Starting test host, adjusts separately the velocity of sound, time window, signal gain, encoder step parameter, carries out to weld seam
Scanning.
Difference detection method is realized using TOFD elder generation when the ultrasonic diffraction of straight tube provided by the invention and elbow banjo fixing butt jointing
Into technology for the defects detection of pressure pipeline (straight tube) and the butt weld of elbow, breach such weld seam because reasons in structure without
Method places probe to be difficult to the limitation detected, has given full play to TOFD defect detection rate height, advantage with high accuracy.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. difference detection method when the ultrasonic diffraction of straight tube and elbow banjo fixing butt jointing, which comprises the steps of:
Determine that initially the acoustic beam central of probe spacing and transmitting probe is away from the distance of axis of a weld according to preset condition；
Transmitting probe and receiving transducer are placed in weld seam the same side, carry out scanning；
Flaw size is obtained according to scanning image.
2. difference detection method when the ultrasonic diffraction of straight tube as described in claim 1 and elbow banjo fixing butt jointing, which is characterized in that institute
It states and includes: according to scanning image acquisition flaw size
Adjustment probe spacing, repeats scanning；
Determine that defect is long according to time in scanning twice of upper diffraction endpoint and lower diffraction endpoint diffracted signal and probe spacing
Degree and defect width.
3. difference detection method when the ultrasonic diffraction of straight tube as claimed in claim 2 and elbow banjo fixing butt jointing, which is characterized in that institute
State time according to upper diffraction endpoint and lower diffraction endpoint diffracted signal in scanning twice and away from the horizontal distance of transmitting probe
It determines defect length and defect width includes:
Determine defect upper extreme point away from scanning face according to time of the upper diffraction endpoint diffracted signal in scanning twice and probe spacing
Depth and horizontal distance away from transmitting probe；
Determine defect lower extreme point away from scanning face according to time of the lower diffraction endpoint diffracted signal in scanning twice and probe spacing
Depth and horizontal distance away from transmitting probe.
4. difference detection method when the ultrasonic diffraction of straight tube as claimed in claim 3 and elbow banjo fixing butt jointing, which is characterized in that institute
It states the time according to upper diffraction endpoint diffracted signal in scanning twice and probe spacing determines defect upper extreme point away from scanning face
The formula of depth and the horizontal distance away from transmitting probe are as follows:
Wherein, c is the longitudinal wave velocity in material, tUpper 1For time of the upper diffraction endpoint diffracted signal in first time scanning, tUpper 2For
Time of the upper diffraction endpoint diffracted signal in second of scanning, PCS1 are initial probe spacing, and PCS2 is between popping one's head in after adjusting
Away from；
Depth h of the defect upper extreme point away from scanning face is obtained according to formula (1) and formula (2)1And the horizontal distance away from transmitting probe
x1, also, h1< 0, x1> 0；
Time according to lower diffraction endpoint diffracted signal in scanning twice and probe spacing determine defect lower extreme point away from sweeping
Look into the depth in face and the formula of the horizontal distance away from transmitting probe are as follows:
Wherein, c is the longitudinal wave velocity in material, tLower 1For time of the lower diffraction endpoint diffracted signal in first time scanning, tLower 2For
Time of the lower diffraction endpoint diffracted signal in second of scanning, PCS1 are initial probe spacing, and PCS2 is between popping one's head in after adjusting
Away from；
Depth h of the defect lower extreme point away from scanning face is obtained according to formula (3) and formula (4)2And the horizontal distance away from transmitting probe
x2, also, h2< 0, x2> 0；
Depth h according to defect upper extreme point away from scanning face1And depth h of the defect lower extreme point away from scanning face2Obtain the public affairs of defect length
Formula are as follows:
H=| h1-h2| (5)
Horizontal distance x according to defect upper extreme point away from transmitting probe1And horizontal distance x of the defect lower extreme point away from transmitting probe2It obtains
The formula of defect width are as follows:
W=| x1-x2| (6)。
5. difference detection method when the ultrasonic diffraction of straight tube as described in claim 1 and elbow banjo fixing butt jointing, which is characterized in that institute
It states and includes: away from the distance of axis of a weld according to the acoustic beam central of the determining probe spacing of preset condition and transmitting probe
The probe determined according to the half-angle of spread of weld width, thickness of workpiece, the half-angle of spread of transmitting probe and receiving transducer
The distance of spacing and transmitting probe away from axis of a weld.
6. difference detection method when the ultrasonic diffraction of straight tube as claimed in claim 2 and elbow banjo fixing butt jointing, which is characterized in that institute
It states and transmitting probe and receiving transducer is placed in weld seam the same side, after progress scanning further include:
Interpretation is carried out to scanning result, defect image is shown if not finding, completes to scan.
7. difference detection method when the ultrasonic diffraction of straight tube as claimed in claim 6 and elbow banjo fixing butt jointing, which is characterized in that institute
Adjustment probe spacing is stated, repeating scanning includes:
To scanning result carry out interpretation, if discovery defect image show, by the spacing of transmitting probe and receiving transducer hiding greatly or
Default adjustment distance is reduced, the spacing that makes initially to pop one's head in becomes spacing of popping one's head in after adjusting, and repeats a scanning.
8. difference detection method when the ultrasonic diffraction of straight tube as claimed in claim 7 and elbow banjo fixing butt jointing, it is characterised in that: institute
Default adjustment distance is stated as the 8%-12% of initial probe spacing.
9. difference detection method when the ultrasonic diffraction of straight tube as claimed in claim 8 and elbow banjo fixing butt jointing, it is characterised in that: institute
Default adjustment distance is stated as the 10% of initial probe spacing.
10. difference detection method when the ultrasonic diffraction of straight tube as described in claim 1 and elbow banjo fixing butt jointing, which is characterized in that
Described that transmitting probe and receiving transducer are placed in weld seam the same side, carrying out scanning includes:
Transmitting probe and receiving transducer are mounted on scanning frame respectively, and are connected respectively with test host；
Scanning frame is placed on base material to be checked according to transmitting probe away from the distance value of axis of a weld；
Starting test host, adjusts separately the velocity of sound, time window, signal gain, encoder step parameter, sweeps to weld seam
It looks into.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554089A (en) * | 2019-09-09 | 2019-12-10 | 西安特种设备检验检测院 | Method, device, equipment and storage medium for detecting welding joint |
| CN110568070A (en) * | 2019-09-09 | 2019-12-13 | 西安特种设备检验检测院 | Method, device, equipment and storage medium for detecting welding joint |
| CN110568071A (en) * | 2019-09-09 | 2019-12-13 | 西安特种设备检验检测院 | Method, device, equipment and storage medium for detecting welding joint |
| CN110988132A (en) * | 2019-12-20 | 2020-04-10 | 中国化学工程第三建设有限公司 | Welding seam single-side TOFD detection method |
| CN114062489A (en) * | 2020-08-06 | 2022-02-18 | 宝山钢铁股份有限公司 | Grading type monitoring method for crack depth of roll neck of leveling roll |
| CN115479991A (en) * | 2022-09-30 | 2022-12-16 | 大连理工大学 | Ultrasonic TOFD detection method for structural defects of spherical seal head |
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| CN102507734A (en) * | 2011-10-26 | 2012-06-20 | 河北省电力建设调整试验所 | Ultrasonic time-of-flight diffraction (TOFD) detection method for weld seam |
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- 2018-09-26 CN CN201811122411.2A patent/CN109239197A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102507734A (en) * | 2011-10-26 | 2012-06-20 | 河北省电力建设调整试验所 | Ultrasonic time-of-flight diffraction (TOFD) detection method for weld seam |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554089A (en) * | 2019-09-09 | 2019-12-10 | 西安特种设备检验检测院 | Method, device, equipment and storage medium for detecting welding joint |
| CN110568070A (en) * | 2019-09-09 | 2019-12-13 | 西安特种设备检验检测院 | Method, device, equipment and storage medium for detecting welding joint |
| CN110568071A (en) * | 2019-09-09 | 2019-12-13 | 西安特种设备检验检测院 | Method, device, equipment and storage medium for detecting welding joint |
| CN110568071B (en) * | 2019-09-09 | 2021-11-02 | 西安特种设备检验检测院 | Method, device, equipment and storage medium for detecting welding joint |
| CN110554089B (en) * | 2019-09-09 | 2022-04-01 | 西安特种设备检验检测院 | Method, device, equipment and storage medium for detecting welding joint |
| CN110988132A (en) * | 2019-12-20 | 2020-04-10 | 中国化学工程第三建设有限公司 | Welding seam single-side TOFD detection method |
| CN114062489A (en) * | 2020-08-06 | 2022-02-18 | 宝山钢铁股份有限公司 | Grading type monitoring method for crack depth of roll neck of leveling roll |
| CN115479991A (en) * | 2022-09-30 | 2022-12-16 | 大连理工大学 | Ultrasonic TOFD detection method for structural defects of spherical seal head |
| CN115479991B (en) * | 2022-09-30 | 2024-05-14 | 大连理工大学 | Ultrasonic TOFD detection method for spherical head structural defect |
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Application publication date: 20190118 |