CN203758968U - Ultrasonic-detecting special probe for butt-joint ring welding seam of austenite stainless steel tube - Google Patents
Ultrasonic-detecting special probe for butt-joint ring welding seam of austenite stainless steel tube Download PDFInfo
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- CN203758968U CN203758968U CN201420176795.7U CN201420176795U CN203758968U CN 203758968 U CN203758968 U CN 203758968U CN 201420176795 U CN201420176795 U CN 201420176795U CN 203758968 U CN203758968 U CN 203758968U
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Abstract
The utility model discloses an ultrasonic-detecting special probe for a butt-joint ring welding seam of an austenite stainless steel tube, which adopts a pitch-catch twin-crystal focusing structure to reduce random disturbance echoes caused by geometrical scattering of a steel tube inner wall and a wedge block; the bottom of a delay inclined wedge is provided with an inwards concave curved surface, so that the delay inclined wedge contacts with a to-be-detected steel tube at the top of the inwards concave curved surface. The special probe forms horizontal polarized shearing waves in austenite stainless steel; compared with other waveforms, the horizontal polarized shearing waves are not converted into other types of waves when being reflected from a surface parallel to the polarized direction, and few disorder echoes exist; the horizontal polarized shearing waves are almost completely transmitted into welding seam metal; compared with other waveforms, the horizontal polarized shearing waves has the advantages that acoustic beam pointing deflection is the smallest. The ultrasonic-detecting special probe disclosed by the utility model can solve technical problems that a small-caliber austenite stainless steel tube which has outer diameter of phi 34-phi 168mm and wall thickness of 3.5-20mm has defects on sensitivity, signal to noise ratio and resolution ratio when carrying out ultrasonic detection on the butt-joint ring welding seam.
Description
Technical field
The utility model belongs to steel weld joint ultrasonic detection technique field, particularly Austenitic stainless steel pipe butt girth welding seam ultrasonic detection technology.
Background technology
The ultrasound examination of austenitic stainless steel weld joint has been compared a great difference with carbon steel, because austenitic stainless steel weld joint metal grain is columnar macrocrystalline structure, make ultrasound wave in the process of propagating, produce strong crystal grain scattering and decay, cause higher noise signal (Lin Zhuanbo), make the useful flaw echoes strength decreased receiving and be submerged in the middle of noise signal, the anisotropy of seam organization can cause ultrasonic wave acoustic beam distortion deflection simultaneously, thereby signal to noise ratio (S/N ratio) is declined to a great extent, and the positioning error of defect also increases greatly.Therefore adopt conventional ultrasound probe cannot effectively detect austenitic stainless steel weld joint, in practical application, have sizable difficulty.For this technical barrier, both at home and abroad mainly by instrument probe performance and signal are processed to be improved, but still immature at present, especially domestic few in the research work aspect this, particularly the research work aspect small-bore Austenitic stainless steel pipe butt-weld ultrasonic detection technology still less.Having the application report of detection method to be summed up mainly contains: low-angle low frequency longitudinal wave probe detects, creeping wave probe detects, twin crystal burst pulse compressional wave oblique incidence probe detects.
CN101694484A provides the method for ultrasonic locating of defect in a kind of austenitic stainless steel weld joint, by making reference block, the weld seam of reference block (2) is detected a flaw, carry out conventional sense: if can trial test can detect the position that is less than the defect of certain dimension limit in reference block weld seam (2), the method that can use conventional ultrasound to detect positions the defect in austenitic stainless steel weld joint (2); Otherwise, just prove that conventional Ultrasound wave detecting method is not applicable to this austenitic stainless steel weld joint, be mainly for whether adopting conventional ultrasound carrying out flaw detection that foundation is provided.
CN102207490A provides a kind of recognition methods of austenitic stainless steel weld joint defects in ultrasonic testing signal, concrete steps: at the tested point place of austenitic stainless steel weld joint, obtain a row A sweep signal a, obtain another row A sweep signal b at adjacent check point place; Respectively signal a and b are carried out to WAVELET PACKET DECOMPOSITION, wavelet packet tree and the details at different levels of picked up signal a and b; The details at different levels of signal a and signal b are done to tired multiplication, obtain the tired details at different levels of taking advantage of and corresponding wavelet packet tree; Tired wavelet packet tree of taking advantage of is carried out to noise reduction process, obtain the A sweep signal after squelch, utilize this A sweep signal to carry out the identification of flaw indication.
1), make and actual three the consistent welded joint test blocks of weld seam that are detected CN102384941A discloses a kind of austenitic stainless steel weld joint ultrasonic detection method, and its step is as follows:; 2), measure all artificial reflecting bodys, then use method of interpolation, obtain the reflection strength that the whole xsect of weld seam is divided region, i.e. two-dimensional distance wave amplitude table; 3), determine the size of zoning in two-dimensional distance wave amplitude table, first by same level position, carry out interpolation; Then in same column, carry out interpolation, so just obtained the reflection benchmark reflection equivalent of weld seam All Ranges; 4), in detection, find after flaw echo, first by sound path and probe K value, determine the region of reflecting body in weld seam, in two-dimensional distance wave amplitude table, find out corresponding reference equivalent, the reflection equivalent of artificial reflecting body settles the standard, with this equivalent, compare with recording defect reflection intensity, so just obtained the equivalent of defect.
CN31-1335/TG < < Non-Destructive Testing > > periodical passes through the test to the Φ 273 * 30mm Austenitic stainless steel pipe butt-weld described in JB/T4730 < < bearing device Non-Destructive Testing > > in the 35th volume the 6th superiority > > of phase < < broadband burst pulse TRL probe in austenitic stainless steel weld joint Ultrasonic Detection in 2013, existing different longitudinal wave probe difference in application in austenitic stainless steel weld joint detects has been described, verified the superiority of broadband burst pulse TRL probe in austenitic stainless steel weld joint Ultrasonic Detection.
Adopt said method to detect, different operating personnel's testing result consistance and poor repeatability, practicality is not strong.Particularly external diameter is the Ultrasonic Detection of Φ 34～Φ 168mm, the wall thickness small-bore Austenitic stainless steel pipe butt girth welding seam that is 3.5～20mm, should use difficulty very large, JB/T4730 < < bearing device Non-Destructive Testing > > does not have corresponding examination criteria yet, and main cause is not have the probe (ultrasonic transducer) that effectively detects small-bore Austenitic stainless steel pipe butt girth welding seam to cause.
Utility model content
The purpose of this utility model is to provide the extraordinary probe of a kind of Austenitic stainless steel pipe butt girth welding seam ultrasound examination, solves the technical matters of Austenitic stainless steel pipe butt girth welding seam ultrasound examination deficiency aspect sensitivity, signal to noise ratio (S/N ratio) and resolution.
The extraordinary probe of a kind of Austenitic stainless steel pipe butt girth welding seam ultrasound examination of the present utility model, it is characterized in that: adopt one one to receive twin crystal focusing structure, comprise that one one is received 2 piezoelectric chips (1), delay wedge (2), sound insulating layer (3), cable (4), shell (5) and damping block (6); Postpone wedge (2) and formed by two rectangular blocks, between two rectangular blocks, accompany sound insulating layer (3); The curved surface that has indent in the bottom that postpones wedge (2), makes at least at inner sunken face top, to contact with steel pipe to be measured; There is symmetrical tangent plane at the exterior angle on two rectangular block tops, and tangent plane assumes diamond in shape, and is respectively equipped with piezoelectric chip (1) on tangent plane, and function is respectively transmitting, receives; Between piezoelectric chip (1) and shell (5), be equipped with damping block (6).
In order to realize good coupling, the bottom that postpones wedge (2) and the surface of contact of steel pipe to be measured are grinding into and are conformed to steel pipe radius-of-curvature or approaching curved surface, and the curved surface radian that postpones the bottom indent of wedge (2) is preferably divided into Φ 34, Φ 42, Φ 48, Φ 89, Φ 114, Φ 140 or Φ 168.
" U.S.'s Non-Destructive Testing handbook " ultrasonic volume is pointed out: in anisotropic material (austenitic stainless steel weld joint metal is anisotropy), generally have three kinds of different linear elasticity ripples to propagate forward along given direction.These three kinds of ripples are not single-mode conventionally, because every kind of common existing wave normal that is parallel to of ripple also has the particle displacement component perpendicular to wave normal.A kind of component is often much bigger than another kind of component.The ripple that contains larger parallel component is " horizontal polarization shearing wave ", and this linear elasticity ripple is neither simple compressional wave, shear wave that neither be simple, but the potpourri of three kinds of linear elasticity ripples of different nature.While being presented on ultra-sonic defect detector display screen to the reflection echo of individual defect, will be three viscous, three ripples together, and generally must have in three ripples the wave amplitude of two other ripple of wave amplitude ratio of a ripple much higher.This waveform can not be converted into the ripple of other types, and clutter echo is less, and when ultrasound wave passes through interface from being parallel to the surface of polarization direction, its transmission coefficient is often higher than other wave modes.Already confirmed, in 18 °～90 ° very wide ranges of incidence angles, " horizontal polarization shearing wave " is almost all transmitted in weld metal; In the weld seam of austenitic stainless steel weld joint and other different metals, use ray spike model to find that " horizontal polarization shearing wave " acoustic beam points to deflection minimum.The extraordinary probe of the utility model Austenitic stainless steel pipe butt girth welding seam ultrasound examination is exactly as breakthrough, the ultrasound wave that excitation produces enters steel pipe seam in the mode of the longitudinal oblique incidence of cylindrical wave wave source, forms other " the horizontal polarization shearing wave " of conventional transducer (pure shear wave, pure compressional wave or climb ripple) different from the past.Adopt one one to receive twin crystal focusing structure, ultrasonic acoustic beam energy is relatively concentrated, has reduced serious how much scatterings of ultrasonic wave acoustic beam at small-caliber steel pipe inner surface of tube wall.
The extraordinary probe of this ultrasound wave is propagated forward for making ultrasonic compressional wave sound bundle be parallel to as far as possible steel pipe tube wall, utilize " horizontal polarization shearing wave " to being distributed in weld seam, the defect various of different nature distributing along throat depth direction effectively detects, and incident angle α gets first critical angle
near.
The extraordinary probe of ultrasound wave of the present utility model designs focal length by focusing on the variation of inclination angle [theta], take compressional wave as primary, takes into account shear wave, it is the principle of focus that compressional wave acoustic beam and shear wave acoustic beam intersect, and the acoustic beam after focusing is thin, and the probability that produces scattering is little, signal to noise ratio (S/N ratio) is high, is conducive to detecting of defect.
The selection principle of piezoelectric chip frequency used is to remove or control by suitable method the geometric effect that ultrasound wave is propagated forward, just can be using the size of ultrasonic attenuation as tested Fine Texture of Material and a kind of very sensitive indicated value of the inherent loss mechanism that causes of variation, namely with the interactional ability of various uncontinuities, these uncontinuities comprise crackle, are mingled with precipitate, crystal boundary, cavity, middle phase border and dislocation.
One the one transmitting wafer of receiving in 2 piezoelectric chips used adopts the higher piezoelectric of transmitting sensitivity to make, receiving wafer adopts the high piezoelectric of receiving sensitivity to make, make extraordinary probe to transmit and receive sensitivity all high, this is that single crystal probe is incomparable.In addition, transmit and receive separately, initial pulse can directly not enter receiving circuit with the reflection clutter postponing on wedge as single crystal probe, blind area is reduced greatly, for thin-walled small-bore pipe weld seam provides advantage.The area of piezoelectric chip is determined according to the thickness of Austenitic stainless steel pipe butt girth welding seam, thickness increase, and chip area needs corresponding increase.Piezoelectric chip shape is preferably selected rectangle, and preferably wafer longitudinal length b is greater than wafer transverse width a.The acoustic beam half-angle of spread of design
λ: wavelength (m), r: transducer workspace radius (m).
Damping block is placed between piezoelectric chip (1) and shell (5), be close to the piezoelectric chip back side, piezoelectric chip is played to damping and support, make to stop as early as possible vibration after piezoelectric chip starting of oscillation, reduced pulse width, improve resolution, also absorbed the ultrasound wave that the piezoelectric chip back side produces simultaneously, reduced the interference that ultrasonic signal is received.The material of damping block is to be preferably epoxy resin system: compositions.
Test probe incident angle α of the present utility model is preferably 27.1 °～27.6 °; The material that postpones wedge is to be preferably organic glass.
The advantage of the extraordinary probe of the small-bore Austenitic stainless steel pipe butt girth welding seam of the utility model ultrasound examination is: " the horizontal polarization shearing wave " of generation decay compared with shear wave with to climb ripple little in austenitic stainless steel butt girth welding seam, and penetration capacity is strong; It is minimum that acoustic beam points to deflection, is more conducive to defect quantitative and location; Focusing aft beam is thin, obtains higher detection sensitivity and resolution in sound beam focusing district; Possessed the multiple character such as short forward position, large K value, broadband, burst pulse, sensitivity, signal to noise ratio (S/N ratio) and the resolution of the small-bore Austenitic stainless steel pipe butt girth welding seam Ultrasonic Detection that can effectively to improve external diameter Φ 34～Φ 168mm, wall thickness be 3.5～20mm simultaneously; For the steel pipe of different size, select pointed probe, strengthened the reliability detecting.
The utility model adopts one one to receive twin crystal focusing structure, has reduced the mixed and disorderly interference echo that how much scatterings and voussoir by steel pipe inner wall cause.Extraordinary probe forms horizontal polarization shearing wave in austenitic stainless steel, with other waveforms, compares, and when when being parallel to the surface reflection of polarization direction, horizontal polarization shearing wave can not be converted into the ripple of other types, and clutter echo is less; In ranges of incidence angles horizontal polarization shearing wave almost all-wave be transmitted in weld metal, compare with other waveforms, it is minimum that its acoustic beam points to deflection.The utility model can solve the technical matters that external diameter is Φ 34～Φ 168mm, the wall thickness small-bore Austenitic stainless steel pipe butt girth welding seam ultrasound examination deficiency aspect sensitivity, signal to noise ratio (S/N ratio) and resolution that is 3.5～20mm.
Accompanying drawing explanation
Fig. 1 is the test structure schematic diagram of the extraordinary probe embodiments of application a kind of small-bore Austenitic stainless steel pipe butt girth welding seam ultrasound examination of the present utility model;
Fig. 2 is the extraordinary probe of the ultrasound examination of Austenitic stainless steel pipe butt girth welding seam shown in Fig. 1 external structure:
In figure: 1 piezoelectric chip, 2 postpones wedge, 3 sound insulating layers, 4 cables, 5 shells, 6 damping blocks;
Fig. 3 A, Fig. 3 B, Fig. 3 C are respectively calibrating and using reference block structural representation for the extraordinary probe of the utility model described in embodiment; Wherein Fig. 3 A is reference block front elevation; Fig. 3 B is reference block side view; Fig. 3 C is reference block vertical view;
Fig. 4 is the Φ horizontal through hole datum line of 34 arc top reference block and the echoed signal figure described in embodiment 1;
Fig. 5 is the artificial defect simulation tubulose test block test position schematic diagram described in embodiment;
Fig. 6 is the Φ 108 * 16mm artificial defect simulation tubulose test block test echoed signal figure described in embodiment 2; Wherein Fig. 6 A is degree of depth 2mm inside surface center line cutting echoed signal figure; Fig. 6 B is degree of depth 2mm outside surface center line cutting echoed signal figure; Fig. 6 C is degree of depth 1mm inside surface center line cutting echoed signal figure; Fig. 6 D is degree of depth 1mm outside surface center line cutting echoed signal figure;
Fig. 7 is conventional transducer test Austenitic stainless steel pipe butt girth welding seam artificial defect echoed signal figure in prior art; Wherein Fig. 7 A, Fig. 7 B are respectively the echoed signal figure of conventional twin crystal creeping wave probe and broadband burst pulse TRL low-angle twin crystal longitudinal wave probe detection Φ 273 * 16mm Austenitic stainless steel pipe;
Embodiment
The utility model special type used probe detects in sound wave focal length F equals the scope of near field region N; the all standing that can use the interior different waveform of detection volume to realize weld seam detects; wherein the probe actual measurement for different size obtains acoustic pressure 6dB decay linear zone; within the scope of this, make RL, SL, EL tri-lines apart from amplitude curve; stipulated to guarantee the correct essential measurement point of datum line making; as show 2(and stipulate by AMSE standard: thickness≤19mm, get at 3 and make datum line).In farther guided wave processed district, RL, SL, EL tri-line normalizings, form almost parallel with base line, high 80%(and SL80% than time) straight line, in the process detecting, adopt multiple decibel method to judge excessive defect value.
Table 1 acoustic pressure 6dB decay linear zone test specification
The utility model special type probe specific embodiment used is the actual verification of reference block and the test block of artificial defect simulation tubulose.Described reference block adopts the austenitic stainless steel (304) identical with tested simulating test pieces material to make, the defect of must not have when normal probe detects >=Φ of this material 1mm flat-bottomed hole equivalent diameter.Two circular arc test blocks of the horizontal through hole of Φ 2 * 30mm that reference block is 10 horizontal through holes of Φ 1 * 20mm that are furnished with different depth, 6 are furnished with different depth, arc top radian is with reference to GB/T17395 series 1, SH3405 and JB/T4730, as Fig. 3; The test block that described specific embodiment adopts is the reference block on Φ 34 and 114 two different arcs tops of Φ, and the digital ultrasonic flaw detector CTS-9009 of Shantou ultrasound instrument research institute and double-layer shielding coaxial-cable line are selected in test, and couplant is machine oil.
What in embodiment, the extraordinary probe of small-bore Austenitic stainless steel pipe butt girth welding seam ultrasound examination adopted is the special type probe shown in the Fig. 1 of institute, Fig. 2, adopt one one to receive twin crystal focusing structure, comprise that one one is received 2 piezoelectric chips (1), delay wedge (2), sound insulating layer (3), cable (4), shell (5) and damping block (6); Postpone wedge (2) and formed by two rectangular blocks, between two rectangular blocks, accompany sound insulating layer (3); The curved surface that has indent in the bottom that postpones wedge (2), makes at least at inner sunken face top and steel pipe to be measured, to fit; There is symmetrical tangent plane at the exterior angle on two rectangular block tops, and tangent plane assumes diamond in shape, and is respectively equipped with piezoelectric chip (1) on tangent plane, and function is respectively transmitting, receives; Between piezoelectric chip (1) and shell (5), be equipped with damping block (6).
Embodiment 1
Making and the system testing apart from amplitude curve carried out in Φ 34 probe test blocks combinations to minimum curvature wherein, select 02# probe, specification is 2.5MPz(6 * 11) * 2/ Φ 34, utilizing reference block R25 and R50 arc surface test probe forward position is 6.5mm, test probe zero point is 5.53 μ S, the calibration velocity of sound is 5698m/s, and acoustic pressure 6dB linear attenuation district hole depth is surveyed, and test result is as table 2.The distance amplitude curve datum line of making is as Fig. 4, and the horizontal through hole 80% wave height test signal to noise ratio (S/N ratio) of H6mm reaches 19dB.
The horizontal through hole test of table 2 Φ 34 arc top reference block
Embodiment 2
Select the extraordinary probe of 01# Φ 114 radians (probe specification is 2.5MPz(20 * 30) * 2/ Φ 114) Φ 108 * 16mm artificial defect is simulated to tubulose test block test.Artificial defect on simulating test pieces is: two face of weld center line cuttings apart from the long 10mm of the wide 0.4mm/ of the dark 1mm/ of outer surface of tube wall, the dark long 10mm of the wide 0.4mm/ of 2mm/, two weld seam inside surface center line cuttings apart from the long 10mm of the wide 0.4mm/ of the dark 1mm/ of inner surface of tube wall, the dark long 10mm of the wide 0.4mm/ of 2mm/, as Fig. 5.Select the extraordinary probe of 3# (probe specification is 2.5MPz(9 * 16) * 2/ Φ 114) test Φ 114 arc top reference blocks, utilizing reference block R25 and R50 arc surface test probe forward position is 12mm, test probe zero point is 14.71 μ S, the calibration velocity of sound is 5685m/s, to surveying close to the horizontal through hole in acoustic pressure 6dB linear attenuation district, test result is as table 3.
The horizontal through hole test of table 3 Φ 114 arc top reference block
Making is apart from amplitude curve, and the 6dB that gains is as Scanning sensitivity.Extraordinary probe is done axial scanning at simulation tubulose test block outside surface, and to girth joint surfaces externally and internally center line, cutting is surveyed, and test result is as table 4.
Table 4 Φ 108 * 16mm artificial defect simulation tubulose test block test
Test figure shows, extraordinary probe described in the utility model has enough sensitivity and signal to noise ratio (S/N ratio) for the detection of austenitic stainless steel butt girth welding seam surface crack class defect, and the wave height of outside surface groove depth 1mm is than the low 2dB of the wave height of outside surface groove depth 2mm left and right; Root crack or lack of penetration class defect are also had to enough sensitivity and signal to noise ratio (S/N ratio), can clearly find the artificial cutting reflection wave of inside surface, the wave height of inside surface groove depth 1mm is than the low 3dB of the wave height of inside surface groove depth 2mm left and right.While being presented on ultra-sonic defect detector display screen to the reflection echo of individual defect, will be three viscous, three ripples together, and generally must have in three ripples the wave amplitude of two other ripple of wave amplitude ratio of a ripple much higher, and clutter echo seldom.For groove incomplete fusion, utilize 25～28 ° of oblique notching simulations of weld seam centre normal angle to contrast detection, obtain same effect.
Extraordinary probe described in the utility model, can effectively solve conventional transducer is the technical matters of the small-bore Austenitic stainless steel pipe butt girth welding seam Ultrasonic Detection sensitivity that is 3.5～20mm of Φ 34～Φ 168mm, wall thickness, signal to noise ratio (S/N ratio), lack of resolution at external diameter, Fig. 7 A, B are respectively the echoed signal figure that conventional twin crystal creeping wave probe and broadband burst pulse TRL low-angle twin crystal longitudinal wave probe detect Φ 273 * 16mm Austenitic stainless steel pipe, the latter's signal to noise ratio (S/N ratio) also only 11dB(signal to noise ratio (S/N ratio) can calculate 20lgH letter/H according to wave amplitude in figure and make an uproar).
The method of operating that extraordinary probe described in the utility model is applied to actual detections is simple and clear, and the consistance of different operating personnel's testing results and repeatability are better, and present embodiment is followed and is conducive to detecting, identify and quantitatively of defect.
Above-described embodiment, is only the specific case that the purpose of this utility model, technical scheme and beneficial effect are further described, and the utility model range of application is not defined in this.
Claims (7)
1. an Austenitic stainless steel pipe butt girth welding seam ultrasound examination special type is popped one's head in, it is characterized in that: adopt one one to receive twin crystal focusing structure, comprise that one one is received 2 piezoelectric chips (1), delay wedge (2), sound insulating layer (3), cable (4), shell (5) and damping block (6); Postpone wedge (2) and formed by two rectangular blocks, between two rectangular blocks, accompany sound insulating layer (3); The curved surface that has indent in the bottom that postpones wedge (2), makes at least at inner sunken face top, to contact with steel pipe to be measured; There is symmetrical tangent plane at the exterior angle on two rectangular block tops, and tangent plane assumes diamond in shape, and is respectively equipped with piezoelectric chip (1) on tangent plane, and function is launched respectively, received; Between piezoelectric chip (1) and shell (5), be equipped with damping block (6).
2. the extraordinary probe of Austenitic stainless steel pipe butt girth welding seam ultrasound examination according to claim 1, is characterized in that: the bottom that postpones wedge (2) has the curved surface radian of indent to be divided into Φ 34, Φ 42, Φ 48, Φ 89, Φ 114, Φ 140 or Φ 168.
3. the extraordinary probe of Austenitic stainless steel pipe butt girth welding seam ultrasound examination according to claim 1, is characterized in that: test probe incident angle α gets first critical angle α
i=arcsinC
l1/ C
l2, C wherein
l1refer to postpone the ultrasonic velocity in wedge, C
l2refer to the ultrasound wave longitudinal wave velocity in Austenitic stainless steel pipe material.
4. according to the extraordinary probe of Austenitic stainless steel pipe butt girth welding seam ultrasound examination in claim 3, it is characterized in that: test probe incident angle α is 27.1 °～27.6 °.
5. according to the extraordinary probe of the Austenitic stainless steel pipe butt girth welding seam ultrasound examination described in any one in claim 1 to 4, it is characterized in that: piezoelectric chip shape is selected rectangle, and wafer longitudinal length b is greater than wafer transverse width a.
6. according to the extraordinary probe of the Austenitic stainless steel pipe butt girth welding seam ultrasound examination described in any one in claim 1 to 4, it is characterized in that: the material of damping block is epoxy resin system: compositions.
7. according to the extraordinary probe of the Austenitic stainless steel pipe butt girth welding seam ultrasound examination described in any one in claim 1 to 4, it is characterized in that: the material that postpones wedge is organic glass.
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| CN201420176795.7U CN203758968U (en) | 2014-04-12 | 2014-04-12 | Ultrasonic-detecting special probe for butt-joint ring welding seam of austenite stainless steel tube |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969341A (en) * | 2014-04-12 | 2014-08-06 | 化学工业设备质量监督检验中心 | Ultrasonic testing special probe for butt girth welding of austenitic stainless steel pipe |
| CN113866279A (en) * | 2021-08-19 | 2021-12-31 | 中车唐山机车车辆有限公司 | Ultrasonic phased array detection method for curved surface double-shaft shoulder friction stir welding seam |
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2014
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969341A (en) * | 2014-04-12 | 2014-08-06 | 化学工业设备质量监督检验中心 | Ultrasonic testing special probe for butt girth welding of austenitic stainless steel pipe |
| CN103969341B (en) * | 2014-04-12 | 2017-03-29 | 化学工业设备质量监督检验中心 | The extraordinary probe of Austenitic stainless steel pipe butt girth welding seam ultrasound examination |
| CN113866279A (en) * | 2021-08-19 | 2021-12-31 | 中车唐山机车车辆有限公司 | Ultrasonic phased array detection method for curved surface double-shaft shoulder friction stir welding seam |
| CN113866279B (en) * | 2021-08-19 | 2023-11-10 | 中车唐山机车车辆有限公司 | Ultrasonic phased array detection method for curved surface double-shaft-shoulder friction stir welding seam |
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