CN103336055B - Method for ultrasonically detecting weld quality of main loop pipeline of nuclear power plant by phased array - Google Patents
Method for ultrasonically detecting weld quality of main loop pipeline of nuclear power plant by phased array Download PDFInfo
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Abstract
The invention discloses a method for ultrasonically detecting the weld quality of a main loop pipeline of a nuclear power plant by a phased array and belongs to the technical field of ultrasonic non-destructive detection and evaluation. According to the method, a phased array ultrasonic test system composed of a Dynaray Lite ultrasonic phased array tester, an integrated UltraVision3.2R9 phased array operation system, a scanning device and a calibration block is adopted. Aiming at the main pipeline having a thickness of 66-99 mm, a proper area array probe is selected, and a focusing principle parameter, an ultrasonic parameter and a mechanical parameter are matched, so as to perform layered detection on a weld of the main pipeline and the peripheral region. Layered permeation in the existing means for detecting the main pipeline is only capable of detecting the surface open defects of the weld; radiographic detection is incapable of quantifying defect depths and insensitive to area defects such as cracks and incomplete fusion; and the conventional ultrasonic detection technology has the defects of being low in detection efficiency, high in cost, low in imaging capacity and the like. The method disclosed by the invention overcomes the defects is good in quantifying accuracy and high in efficiency in field detection, and has great economic benefits and social benefits.
Description
Technical field
The present invention relates to a kind of method of phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam quality, it belongs to Ultrasonic NDT and assessment technique field.
Background technology
Centrifugal casting austenic stainless steel (the Centrifugal CastingAustenitic Stainless Steel of wall thickness 66 ~ 99mm, CCASS) be one of the main material that pressurized-water reactor nuclear power plant primary Ioops ooling channel uses, generally connected by welding between pipeline, the fine or not direct relation of welding quality the safety and reliability of nuclear power station operation.In the inspection specification and outline (IWA-2232APP.I) of nuclear power station and nuclear power unit, the crudy of major loop pipe welding seam and situation are during one's term of military service proposed to the Compulsory Feature of Non-Destructive Testing.Accurately, the research and development of major loop pipe welding seam Dynamic Non-Destruction Measurement are reliably the urgent engineering demands that nuclear plant safety runs.
Current examination criteria and technical conditions require carry out layering Liquid penetrant testing and ray detection to this type of weld seam and utilize conventional Ultrasound to detect as supplementary means.But layering infiltration can only detect face of weld flaws, and trace routine is loaded down with trivial details, and speed is slow, and the cycle is long; Ray detection is harmful, and to the very large crackle of harmfulness, incomplete fusion homalographic type defect insensitive, is easy to occur undetected, brings very large hidden danger to the safe operation of nuclear power facility; It is poor that conventional Ultrasound detects accessibility, and testing result accuracy is subject to coupling condition and the impact of technician's level, is difficult to detect fast and accurately.
Summary of the invention
The object of this invention is to provide a kind of method of phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam quality.Compared with conventional Ultrasound detection method, the method, by the phase delay of each array element transmitting/receiving in adjustment probe, produces deflection and focused beam, thus effectively improves accessibility.Meanwhile, by optimal control focal position, burnt district size and sound beam direction, greatly can also improve and detect resolving power, signal to noise ratio (S/N ratio) and sensitivity.Ultrasonic phase array adopts electronic method to control the scanning of acoustic beam, completing fast checking, not only increasing the speed of detection, more ensure that the stable and consistent of coupling condition when not moving or lack mobile probe.Abundant scanning pattern also contributes to the correct identification of flaw indication.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method of phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam quality, and it adopts and comprises the device that Dynaray Lite ultrasonic phase array detector, UltraVision3.2R9 phased array operation system, low frequency twin crystal compressional wave face battle array probe, scanner and calibration block form the thick centrifugal casting austenic stainless steel main pipe welding seam region of detection 66 ~ 99mm.The measuring process that it adopts is as follows:
(1) material trademark of detected member, weld seam form, welding technology, size and scope is understood; Surface treatment is carried out to detected member: for surface in contact, remove hinder probe moving freely or weaken ultrasonic vibration propagate welding spatter drip and any coarse thing, guarantee that surface roughness Ra is no more than 6.3 μm, probe is free on surface in contact completely mobile; For face of weld, remove make flaw indication fuzzy or can not be found irregularly shaped; Weld seam mark, welding position tag line and position while welding reference point is clearly made on detected member surface; According to the couplant that detected material selection is suitable;
(2) in UltraVision3.2R9 phased array operation system, set up sample mold type, tested region longitudinal wave velocity, decay are measured;
(3) according to the longitudinal wave velocity in tested region, the test result of decay, material properties in edit model, selects suitable detection angles;
(4) at thickness direction, surveyed area layering is carried out to the mother metal of detected member weld seam and contiguous weld seam at least 10mm scope, use 1.5MHz face battle array probe to detect 0 ~ 20mm region, below scanning surface; 1.0MHz face battle array probe detects 20 ~ 60mm region, below scanning surface; 0.5MHz face battle array probe detects below scanning surface 60mm to bottom surface scope;
(5) 1.5MHz face battle array probe and Dynaray Lite ultrasonic phase array detector is connected, assembling phased array detection system; Apart from the artificial horizontal through hole in surperficial following 0 ~ 20mm region on selection standard block, arrange according to the focusing rule of the degree of depth determination phased array operation system of defect, ultrasonic setting and machinery, add dynamic volume corrected fan sweeping figure, B at the detection interface of UltraVision3.2R9 phased array operation system and sweep figure, C and sweep figure and D and sweep figure; Add static volume corrected fan sweeping figure, B at the assay surface of UltraVision3.2R9 phased array operation system to sweep figure, C and sweep figure and D and sweep figure; Voussoir delay and longitudinal wave velocity calibration are carried out to phased array detection system;
(6) stepping rate of scanner is calibrated, assembling 1.5MHz face battle array probe and scanner; Setting scanning path, resolution and scanning stepping rate; Start scanner and scanning is carried out to detected member, record scanning result; Analyze scanning result, sweep figure and B at static fan sweeping figure, A of obtaining and sweep in figure the defect information reading 0 ~ 20mm region, below scanning surface, judge defect type and recording defect size; For the area-type defect run in scanning process ,-6dB method is utilized to measure defect length in conjunction with multi views;
(7) when using 1.0MHz and 0.5MHz face battle array probe to detect below scanning surface 20 ~ 60mm and 60mm respectively to base surface area, respectively selection standard block carries out the calibration of phased array system apart from the artificial horizontal through hole in following 20 ~ 60mm region, surface and 60mm to the artificial horizontal through hole of base surface area, all the other step method and (5), (6) step are identical.
The invention has the beneficial effects as follows: overcome layering infiltration and can only detect face of weld flaws, trace routine is loaded down with trivial details, and speed is slow, and the cycle is long; Ray detection is harmful, and to the very large crackle of harmfulness, incomplete fusion homalographic type defect insensitive, is easy to occur undetected, brings very large hidden danger to the safe operation of nuclear power facility; It is poor that conventional Ultrasound detects accessibility, and testing result accuracy is subject to coupling condition and the impact of technician's level, is difficult to shortcomings such as detecting fast and accurately.The present invention can detect rapidly quality and the service state of PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam accurately, device therefor controllability is strong, measuring accuracy is high, and Site Detection result is reliable and stable, has very great meaning to the smooth construction of nuclear power station and safe operation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the hardware configuration connection diagram of the method equipment therefor of a kind of phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam crudy and service state.
Fig. 2 is the fan sweeping figure that phased array detects that on circumferential test block weld seam, 30mm and 50mm degree of depth hole is corresponding.
Fig. 3 is the most strong position fan sweeping figure of echo amplitude that phased array detects on circumferential test block weld seam corresponding to place's crackle.
Fig. 4 is that phased array detects the B that on circumferential test block weld seam, two places are closed on corresponding to crackle and sweeps figure.
Fig. 5 is the phased array detection axis fan sweeping figure corresponding to 35mm and 60mm degree of depth hole on test block weld seam.
Fig. 6 is that phased array detection axis is to the most strong position fan sweeping figure of the echo amplitude corresponding to test block one place crackle.
Fig. 7 is that phased array detection axis sweeps figure to the B corresponding to test block one place crackle.
Embodiment
The method Dynaray Lite ultrasonic phase array detector as shown in Figure 1 of this phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam quality, UltraVision3.2R9 phased array operation system, low frequency twin crystal compressional wave face battle array probe, scanner and calibration block are formed.The centrifugal casting austenic stainless steel PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipeline of wall thickness 66 ~ 99mm can be detected.Described testing process is as follows:
(1) for thickness be the centrifugal casting austenic stainless steel phased array detection axis of 92mm to test block, recognize that its welding manner is narrow gap auto welding, the scope of butt welded seam and contiguous mother metal 10mm must carry out 100% detection.Surface treatment is carried out to detected member: for surface in contact, remove hinder probe moving freely or weaken ultrasonic vibration propagate welding spatter drip and any coarse thing, guarantee that surface roughness Ra is no more than 6.3 μm, probe is free on surface in contact completely mobile; For face of weld, remove make flaw indication fuzzy or can not be found irregularly shaped.Weld seam mark, welding position tag line and position while welding reference point is clearly made on detected member surface.The special couplant of austenitic stainless steel selected by couplant.
(2) according to spoolpiece size information, in UltraVision3.2R9 phased array operation system specimen design module, set up pipeline section weld seam model, choose 0.5MHz face battle array probe assembling ultrasonic phase array detection system.Setup parameter in UltraVision3.2R9 phased array operation system.1. the setting of rule is focused on: Dynaray Lite selected by detecting instrument hardware; Probe selects 0.5MHz face battle array TRL to pop one's head in, main drive shaft number of wafers 10, wafer pitch 6.5mm, wafer size 6.4mm, driven shaft number of wafers 5, wafer pitch 7mm, wafer size 6.9mm; Voussoir wedge angle arranges 20.5 °, angle of a roof 0 °, the first wafer height 16mm, longitudinal wave velocity 2330m/s, transverse wave velocity 1157m/s, the long 90mm of voussoir, wide 51mm, high 60mm.Acoustic beam angle Selection is from the fan sweeping of-30 ° to 30 °; Sound beam focusing mode is projection focusing, focal position distance reference point 8mm; Wafer interface selects two Hypertronics, and wafer number of excitations selects full-wafer.2. ultrasonic setting: yield value is set to 45dB; Shi Ji is set to 0.43mm to 58.31mm; Digitization frequencies is set to 100MHz; Pulse repetition rate 125Hz; Exciting voltage 100V; Pulse width 500ns.3. machinery is arranged: type selecting internal clocking; Resolution is set to 1mm; Scope is set to 200mm.Selection standard block upper bottom surface, carries out voussoir and postpones and longitudinal wave velocity calibration.Add dynamic volume corrected fan sweeping figure and online A at the detection interface of UltraVision3.2R9 phased array operation system and sweep figure, the longitudinal wave velocity recording weld seam peripheral region is 5793m/s, decays to 0.08dB/mm.
(3) in UltraVision3.2R9 phased array operation system specimen design module, setting material longitudinal wave velocity is 5793m/s.
(4) at thickness direction, surveyed area layering is carried out to the scope of detected member weld seam and contiguous mother metal at least 10mm, use 1.5MHz face battle array probe to detect 0 ~ 20mm region, below scanning surface; 1.0MHz face battle array probe detects 20 ~ 60mm region, below scanning surface; 0.5MHz face battle array probe detects 60mm to 92mm region, below scanning surface.
(5) 1.5MHz face battle array probe assembling ultrasonic phase array detection system is chosen.Partial parameters is revised in UltraVision3.2R9 phased array operation system.1. the setting of rule is focused on: probe selects 1.5MHz face battle array TRL to pop one's head in, main drive shaft number of wafers 8, wafer pitch 3.5mm, wafer size 3.4mm, driven shaft number of wafers 4, wafer pitch 4mm, wafer size 3.9mm; Voussoir wedge angle is set to 19 °, angle of a roof 0 °, the first wafer height 8.5mm, longitudinal wave velocity 2330m/s, transverse wave velocity 1157m/s, the long 44mm of voussoir, wide 22.23mm, high 25mm; Acoustic beam angle Selection is from the fan sweeping of 11 ° to 70 °; Sound beam focusing mode is projection focusing, focal position distance reference point 8mm; 2. ultrasonic setting: yield value is set to 45dB; Shi Ji is set to 0.43mm to 50.3mm; Pulse width 300ns.Add dynamic volume corrected fan sweeping figure, B to sweep figure, C and sweep figure and D at the detection interface of UltraVision3.2R9 phased array operation system and sweep figure; Add static volume corrected fan sweeping figure, B at the assay surface of UltraVision3.2R9 phased array operation system to sweep figure, C and sweep figure and D and sweep figure; 10mm degree of depth hole on selection standard block, carries out voussoir and postpones and longitudinal wave velocity calibration.
(6) stepping rate of scanner is calibrated, assembling 1.5MHz face battle array probe and scanner.Setting scanner carries out linear uniform motion with 1mm/s, and scanning scope is 200mm.Start scanner and carry out scanning, record scanning result.Analyze scanning result, sweep signal and B at static fan sweeping figure, A of obtaining to sweep in figure and observe 0 ~ 20mm region, below scanning surface and have two place's pores and crackle everywhere, for pore, it is made to be imaged on fan sweeping figure centre position, move left and right probe, it is maximum that the A making pore corresponding sweeps signal amplitude, reads the pore degree of depth; For crackle, make it be imaged on 30 ° of positions on fan sweeping figure all the time, sweep in figure at the B obtained and apply-6dB area size survey instrument in UltraVision3.2R9 phased array operation system to carry out crack length quantitative.
(7) 1.0MHz face battle array probe assembling ultrasonic phase array detection system is chosen.Partial parameters is revised in UltraVision3.2R9 phased array operation system.1. the setting of rule is focused on: probe selects 1.0MHz face battle array TRL to pop one's head in, main drive shaft number of wafers 12, wafer pitch 5mm, wafer size 4.5mm, driven shaft number of wafers 5, wafer pitch 6mm, wafer size 5.5mm; Voussoir wedge angle is set to 19.5 °, angle of a roof 0 °, the first brilliant height 12mm, longitudinal wave velocity 2330m/s, transverse wave velocity 1157m/s, the long 77mm of voussoir, wide 51mm, high 35.7mm, the fan sweeping that acoustic beam angle Selection is 11 ° to 70 °.2. ultrasonic setting: yield value is set to 45dB; Shi Ji is set to 0.43mm to 80.31mm; Pulse width 500ns.Add dynamic volume corrected fan sweeping figure, B to sweep figure, C and sweep figure and D at the detection interface of UltraVision3.2R9 phased array operation system and sweep figure; Add static volume corrected fan sweeping figure, B at the assay surface of UltraVision3.2R9 phased array operation system to sweep figure, C and sweep figure and D and sweep figure.50mm degree of depth hole on selection standard block, carries out voussoir and postpones and longitudinal wave velocity calibration.
(8) stepping rate of scanner is calibrated, assembling 1.0MHz face battle array probe and scanner.Setting scanner carries out linear uniform motion with 1mm/s, and scanning scope is 200mm.Start scanner and carry out scanning, record scanning result.Analyze scanning result, sweep signal and B at static fan sweeping figure, A of obtaining to sweep in figure and observe 20 ~ 60mm region, below scanning surface and have pore everywhere, wherein a place 30mm deep hole and 50mm deep hole are as shown in Figure 2, pore is made to appear at fan sweeping figure centre position, move left and right probe, it is maximum that the A making pore corresponding sweeps signal amplitude, reads the pore degree of depth.
(9) 0.5MHz face battle array probe assembling ultrasonic phase array detection system is chosen.Partial parameters is revised in UltraVision3.2R9 phased array operation system.1. the setting of rule is focused on: probe selects 0.5MHz face battle array TRL to pop one's head in, main drive shaft number of wafers 10, wafer pitch 6.5mm, wafer size 6.4mm, driven shaft number of wafers 5, wafer pitch 7mm, wafer size 6.9mm; Voussoir wedge angle is set to 20.5 °, angle of a roof 0 °, the first wafer height 16mm, longitudinal wave velocity 2330m/s, transverse wave velocity 1157m/s, the long 90mm of voussoir, wide 51mm, high 60mm.The fan sweeping that acoustic beam angle Selection is 11 ° to 70 °.2. ultrasonic setting: yield value is set to 45dB; Shi Ji is set to 0.43mm to 100mm; Pulse width 1000ns.Add dynamic volume corrected fan sweeping figure, B to sweep figure, C and sweep figure and D at the detection interface of UltraVision3.2R9 phased array operation system and sweep figure; Add static volume corrected fan sweeping figure, B at the assay surface of UltraVision3.2R9 phased array operation system to sweep figure, C and sweep figure and D and sweep figure.80mm degree of depth hole on selection standard block, carries out voussoir and postpones and longitudinal wave velocity calibration.
(10) stepping rate of scanner is calibrated, assembling 0.5MHz face battle array probe and scanner.Setting scanner carries out linear uniform motion with 1mm/s, and scanning scope is 200mm.Start scanner and carry out scanning, record scanning result.Analyze scanning result, sweep signal and B at static fan sweeping figure, A of obtaining and sweep in figure and observe below scanning surface 60mm and have pore and six place's crackles everywhere to base surface area.For pore, make it be imaged on fan sweeping figure centre position, move left and right probe, it is maximum that the A making pore corresponding sweeps signal amplitude, reads the pore degree of depth; For crackle, make it be imaged on fan sweeping figure 30 ° of positions all the time as shown in Figure 3, sweep in figure at the B obtained and apply-6dB area size survey instrument in UltraVision3.2R9 phased array operation system and carry out crack length quantitatively as shown in Figure 4.
Phased array ultrasonic detection result and error are utilized as shown in Table 1 and Table 2 to the test block of above-mentioned phased array circumference.
Table 1 phased array detects pore testing result and error analysis in circumferential test block
Note: wherein the actual diameter of pore is 3mm.
Table 2 phased array detects crackle result and error analysis in circumferential test block
Note: wherein the degree of depth is the crackle of 83mm is that axially other is and is circumferentially arranged.
(11) according to above-mentioned method, the phased array detection axis that 92mm is thick is detected to test block, the phased array detection axis fan sweeping figure corresponding to 35mm and 60mm degree of depth hole on test block weld seam as shown in Figure 5, to the most strong position fan sweeping figure of the echo amplitude corresponding to test block one place crackle as shown in Figure 6, this B corresponding to place's crackle sweeps figure as shown in Figure 7 to phased array detection axis.Defectoscopy result and error are as shown in table 3 Yu table 4.
Table 3 phased array detection axis is to pore testing result and error analysis in test block
Note: wherein the actual diameter of pore is 3mm.
Table 4 phased array detection axis is to crackle result and error analysis on test block weld seam
Note: wherein second place's degree of depth is the crackle of 83mm is that axially other is and is circumferentially arranged.
In ASME BPVC the Ⅺth volume Nuclear Power Plant Equipment inservice inspection rule, coarse grained austenite pipe welding seam ultrasonic examination checking requirement is specified, if quantitatively performance the result meets following criterion, then inspection procedure, equipment and personnel are qualified by inspection in quantitative.
A () is compared with defect physical length, ultrasonic measurement defect length root-mean-square error is less than or equal to 0.75in. (19mm), measures the base metals crack length at 75% base metals wall thickness place.
B () is compared with defect actual grade, ultrasonic measurement depth of defect root-mean-square error is no more than 0.125in. (3.2mm).
Defect arrangement requirement in quantitative sample during ultrasonic measurement length.
A () has 10 defects at least.
(b) at least defect sum 1/3, round, its degree of depth should be 5%-30% pipeline nominal wall thickness.At least defect sum 1/3, round, its degree of depth should be greater than 30% pipeline nominal wall thickness.Have one at least and mostly be 10% of defect sum most, rounding, should be axially.
To carry out quantitatively to length when the method detects crackle, phased array detects crackle in circumferential test block and adds up to 10, wherein the degree of depth has 4 at the crackle of 5-30% wall thickness crackle, and the crackle that the degree of depth is greater than 30% pipeline nominal wall thickness has 6, and wherein a place is axial crack; Phased array detection axis adds up to 10 to crackle in test block, and wherein the degree of depth has 5 at the crackle of 5-30% wall thickness crackle, and the crackle that the degree of depth is greater than 30% pipeline nominal wall thickness has 5, and wherein a place is axial crack.Two test block defects are arranged and are all met the demands, according to (a) standard, quantitative-length is carried out an acceptance inspection, phased array detects the root-mean-square deviation that in circumferential test block and axial test block, crack length is quantitative and is respectively 5.03mm and 6.01mm, is all less than 19mm, meets standard-required.
Defect arrangement requirement in quantitative sample during ultrasonic measurement length.
A () has 10 defects at least.
B the defect in () degree of depth quantitative sample group should by following description
Remaining defect should belong to above-mentioned arbitrary classification.
To carry out quantitatively to the degree of depth when the method detects pore, phased array detects pore in circumferential test block and adds up to 10, wherein the degree of depth has 3 at the pore of 5-30% wall thickness pore, and the degree of depth has 3 at the pore of 31-60% wall thickness, and the degree of depth has 4 at the pore of 61-100% wall thickness; Phased array detection axis adds up to 18 to pore in test block, and wherein the degree of depth has 5 at the pore of 5-30% wall thickness pore, and the degree of depth has 7 at the pore of 31-60% wall thickness, and the degree of depth has 6 at the pore of 61-100% wall thickness.Two test block defects are arranged and are all met the demands, according to (b) standard, the degree of depth is quantitatively carried out an acceptance inspection, phased array detects the root-mean-square deviation that in circumferential test block and axial test block, the pore degree of depth is quantitative and is respectively 1.29mm and 1.31mm, is all less than 3.2mm, meets standard-required.
Analysis shows, phased array detects circumferential test block and phased array detection axis is arranged to defect in test block and testing result meets ASME BPVC, prove the acceptance(check) in quantitative of this inspection procedure and equipment, have in engineer applied and important meaning.
Claims (1)
1. by a method for phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam crudy, it is characterized in that: it adopts the detection system comprising the thick centrifugal casting austenic stainless steel main pipe welding seam of detection 66 ~ 99mm that Dynaray Lite ultrasonic phase array detector, UltraVision3.2R9 phased array operation system, low frequency twin crystal compressional wave face battle array probe, scanner and calibration block are formed; The measuring process that it adopts is as follows:
(1) material trademark of detected member, weld seam form, welding technology, size and scope is understood; Surface treatment is carried out to detected member: for surface in contact, remove hinder probe moving freely or weaken ultrasonic vibration propagate welding spatter drip and any coarse thing, guarantee that surface roughness Ra is no more than 6.3 μm, probe is free on surface in contact completely mobile; For face of weld, remove make flaw indication fuzzy or can not be found irregularly shaped; Weld seam mark, welding position tag line and position while welding reference point is clearly made on detected member surface; According to the couplant that detected material selection is suitable;
(2) in UltraVision3.2R9 phased array operation system, set up sample mold type, tested region longitudinal wave velocity, decay are measured;
(3) according to the longitudinal wave velocity in tested region, the test result of decay, material properties in edit model, selects suitable detection angles;
(4) at thickness direction, surveyed area layering is carried out to the mother metal of detected member weld seam and contiguous weld seam at least 10mm scope, use 1.5MHz face battle array probe to detect 0 ~ 20mm region, below scanning surface; 1.0MHz face battle array probe detects 20 ~ 60mm region, below scanning surface; 0.5MHz face battle array probe detects below scanning surface 60mm to bottom surface scope;
(5) 1.5MHz face battle array probe and Dynaray Lite ultrasonic phase array detector is connected, assembling phased array detection system; Apart from the artificial horizontal through hole in surperficial following 0 ~ 20mm region on selection standard block, arrange according to the focusing rule of the degree of depth determination phased array operation system of defect, ultrasonic setting and machinery, add dynamic volume corrected fan sweeping figure, B at the detection interface of UltraVision3.2R9 phased array operation system and sweep figure, C and sweep figure and D and sweep figure; Add static volume corrected fan sweeping figure, B at the assay surface of UltraVision3.2R9 phased array operation system to sweep figure, C and sweep figure and D and sweep figure; Voussoir delay and longitudinal wave velocity calibration are carried out to phased array detection system;
(6) stepping rate of scanner is calibrated, assembling 1.5MHz face battle array probe and scanner; Setting scanning path, resolution and scanning stepping rate; Start scanner and scanning is carried out to detected member, record scanning result; Analyze scanning result, sweep figure and B at static fan sweeping figure, A of obtaining and sweep in figure the defect information reading 0 ~ 20mm region, below scanning surface, judge defect type and recording defect size; For the area-type defect run in scanning process ,-6dB method is utilized to measure defect length in conjunction with multi views;
(7) when using 1.0MHz and 0.5MHz face battle array probe to detect below scanning surface 20 ~ 60mm and 60mm respectively to base surface area, respectively selection standard block carries out the calibration of phased array system apart from the artificial horizontal through hole in following 20 ~ 60mm region, surface and 60mm to the artificial horizontal through hole of base surface area, all the other step method and (5), (6) step are identical.
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