CN103336055A - 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 phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam method for quality of using, it belongs to Ultrasonic NDT and assessment technique field.
Background technology
The centrifugal casting austenic stainless steel of wall thickness 66～99mm (Centrifugal Casting Austenitic Stainless Steel, CCASS) be one of main material of using of pressurized-water reactor nuclear power plant one circuit cools agent pipeline, generally connect by welding between the pipeline, the fine or not direct relation of welding quality security and the 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 have during one's term of military service been proposed the Compulsory Feature of Non-Destructive Testing.Accurately, the research and development of major loop pipe welding seam Dynamic Non-Destruction Measurement reliably are the urgent engineering demands of nuclear plant safety operation.
Present examination criteria and technical conditions require this type of weld seam is carried out layering infiltration detection and ray detection and utilizes conventional Ultrasonic Detection as supplementary means.But the layering infiltration can only detect the 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 big crackle of harmfulness, incomplete fusion homalographic type defective and insensitive, is easy to take place omission, brings very big hidden danger for the safe operation of nuclear power facility; Conventional Ultrasonic Detection accessibility is relatively poor, and the testing result accuracy is subject to coupling condition and technician's level affects, is difficult to detect fast and accurately.
Summary of the invention
The purpose of this invention is to provide a kind of with phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam method for quality.Compare with conventional supersonic detection method, this method produces deflection and focused beam, thereby effectively improves accessibility by adjusting the phase delay of each array element transmitting/receiving in the probe.Simultaneously, by optimal control focal position, burnt district's size and sound beam direction, can also greatly improve and detect resolving power, signal to noise ratio (S/N ratio) and sensitivity.Ultrasonic phase array adopts the scanning of electronic method control acoustic beam, finishes fast checking under the situation of mobile or few mobile probe, has not only improved the speed that detects, and has more guaranteed the stable and consistent of coupling condition.Abundant scanning pattern also helps the correct identification of flaw indication.
The technical solution adopted for the present invention to solve the technical problems is: a kind of with phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam method for quality, it is characterized in that: it adopts and comprises that Dynaray Lite ultrasonic phase array detector, UltraVision3.2R9 phased array operating system, low frequency twin crystal compressional wave face battle array probe, scanner and calibration block constitute the device that detects the thick centrifugal casting austenic stainless steel main pipe welding seam zone of 66～99mm.The measuring process that it adopts is as follows:
(1) material trademark, weld seam pattern, welding technology, size and the scope of understanding detected member; Detected member is carried out surface treatment: for surface in contact, the welding that moving freely or weakening ultrasonic vibration transmission that remove to hinder probe is spattered and is dripped and any coarse thing, guarantee that surface roughness Ra is no more than 6.3 μ m, it is mobile that probe is free at surface in contact completely; For face of weld, removing is blured flaw indication or can not be found irregularly shaped; Make weld seam sign, welding position tag line and position while welding reference point clearly on the detected member surface; According to the detected suitable couplant of material selection;
(2) in UltraVision3.2R9 phased array operating system, set up the sample mold type, tested regional longitudinal wave velocity, decay are measured;
(3) according to the longitudinal wave velocity in tested zone, the test result of decay, material properties in the edit model is selected suitable detection angles;
(4) to detected member weld seam and contiguous mother metal at least the scope of 10mm carry out the surveyed area layering at thickness direction, use 1.5MHz face battle array probe to detect following 0～20mm zone, scanning surface; 1.0MHz face battle array probe detects following 20～60mm zone, scanning surface; 0.5MHz face battle array probe detects the scanning following 60mm in surface to the bottom surface scope;
(5) connect 1.5MHz face battle array probe and Dynaray Lite ultrasonic phase array detector, assembling phased array detection system; The artificial horizontal through hole in following 0～20mm zone, distance surface on the selection standard piece, determine that according to the degree of depth of defective the focusing rule of phased array system, ultrasonic setting and machinery arrange, add the corrected fan sweeping figure of dynamic volume, B at the detection interface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure; Add the corrected fan sweeping figure of static volume, B at the assay surface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure; The phased array detection system is carried out voussoir delay and longitudinal wave velocity calibration;
(6) stepping rate of calibration scanner, assembling 1.5MHz face battle array probe and scanner; Set scanning path, resolution and scanning stepping rate; Start scanner detected member is carried out scanning, record scanning result; Analyze the scanning result, sweep figure and B sweeps the defect information that reads 0～20mm zone below the scanning surface among the figure at the static fan sweeping figure, the A that obtain, judge defect type and recording defect size; For the area-type defective that runs in the scanning process, measure defect length in conjunction with many views utilization-6dB method;
When (7) using 1.0MHz and 0.5MHz face battle array probe to detect the following 20～60mm in scanning surface and 60mm to base surface area respectively, artificial horizontal through hole and the 60mm apart from following 20～60mm zone, surface carries out the calibration of phased array system to the artificial horizontal through hole of base surface area on the selection standard piece respectively, and all the other step method go on foot identical with (5), (6).
The invention has the beneficial effects as follows: overcome the layering infiltration and can only detect the 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 big crackle of harmfulness, incomplete fusion homalographic type defective and insensitive, is easy to take place omission, brings very big hidden danger for the safe operation of nuclear power facility; Conventional Ultrasonic Detection accessibility is relatively poor, and the testing result accuracy is subject to coupling condition and technician's level affects, shortcoming such as is difficult to detect fast and accurately.The present invention can detect quality and the service state of PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam rapidly accurately, the device therefor controllability is strong, the measuring accuracy height, on-the-spot testing result is reliable and stable, and the smooth construction of nuclear power station and safe operation are had very significant meaning.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a kind of hardware configuration connection diagram of using the method equipment therefor 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 30mm and 50mm degree of depth hole correspondence on the circumferential test block weld seam.
Fig. 3 is that phased array detects the strong position fan sweeping figure of the corresponding echo amplitude of place's crackle on the circumferential test block weld seam.
Fig. 4 is that phased array detects on the circumferential test block weld seam two places and closes on the corresponding B of crackle and sweep figure.
Fig. 5 is the fan sweeping figure that phased array detects 35mm and 60mm degree of depth hole correspondence on the axial test block weld seam.
Fig. 6 is that phased array detects the strong position fan sweeping figure of the corresponding echo amplitude of axial test block one place's crackle.
Fig. 7 is that phased array detects the corresponding B of axial test block one place's crackle and sweeps figure.
Embodiment
This phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam method for quality is made of Dynaray Lite ultrasonic phase array detector shown in Figure 1, UltraVision3.2R9 phased array operating system, low frequency twin crystal compressional wave face battle array probe, scanner and calibration block.Can detect the centrifugal casting austenic stainless steel PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipeline of wall thickness 66～99mm.Described testing process is as follows:
(1) be that the centrifugal casting austenic stainless steel phased array of 92mm detects axial test block at thickness, recognize that its welding manner is narrow gap auto welding, must butt welded seam and the scope of contiguous mother metal 10mm carry out 100% and detect.Detected member is carried out surface treatment: for surface in contact, the welding that moving freely or weakening ultrasonic vibration transmission that remove to hinder probe is spattered and is dripped and any coarse thing, guarantee that surface roughness Ra is no more than 6.3 μ m, it is mobile that probe is free at surface in contact completely; For face of weld, removing is blured flaw indication or can not be found irregularly shaped.Make weld seam sign, welding position tag line and position while welding reference point clearly on the detected member surface.Couplant is selected the special-purpose couplant of austenitic stainless steel for use.
(2) according to the pipeline section dimension information, in UltraVision3.2R9 phased array operating system sample 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 operating system.1. focus on the setting of rule: detecting instrument hardware is selected Dynaray Lite; Probe is selected 0.5MHz face battle array TRL probe, 10 of main drive shaft number of wafers, wafer pitch 6.5mm, wafer size 6.4mm, 5 of driven shaft number of wafers, wafer pitch 7mm, wafer size 6.9mm; Voussoir wedge angle arranges 20.5 °, 0 ° of angle of a roof, 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 acoustic beam angle Selection is from-30 ° to 30 ° fan sweeping; The sound beam focusing mode is that projection focuses on focal position distance reference point 8mm; The wafer interface is selected two Hypertronics, and the wafer number of excitations is selected 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 arranges: the type selecting internal clocking; Resolution is set to 1mm; Scope is set to 200mm.Selection standard piece upper bottom surface carries out voussoir delay and longitudinal wave velocity calibration.Sweep figure at the detection interface of the UltraVision3.2R9 phased array operating system interpolation corrected fan sweeping figure of dynamic volume and online A, the longitudinal wave velocity that records the weld seam peripheral region is 5793m/s, decays to 0.08dB/mm.
(3) in UltraVision3.2R9 phased array operating system sample design module, setting material longitudinal wave velocity is 5793m/s.
(4) to detected member weld seam and contiguous mother metal at least the scope of 10mm carry out the surveyed area layering at thickness direction, use 1.5MHz face battle array probe to detect following 0～20mm zone, scanning surface; 1.0MHz face battle array probe detects following 20～60mm zone, scanning surface; 0.5MHz face battle array probe detects following 60mm to 92mm zone, scanning surface.
(5) choose 1.5MHz face battle array probe assembling ultrasonic phase array detection system.In UltraVision3.2R9 phased array operating system, revise partial parameters.1. focus on the setting of rule: probe is selected 1.5MHz face battle array TRL probe, 8 of main drive shaft number of wafers, wafer pitch 3.5mm, wafer size 3.4mm, 4 of driven shaft number of wafers, wafer pitch 4mm, wafer size 3.9mm; Voussoir wedge angle is set to 19 °, 0 ° of angle of a roof, 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; The acoustic beam angle Selection is from 11 ° to 70 ° fan sweeping; The sound beam focusing mode is that projection focuses on 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 the corrected fan sweeping figure of dynamic volume, B at the detection interface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure; Add the corrected fan sweeping figure of static volume, B at the assay surface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure; Voussoir delay and longitudinal wave velocity calibration are carried out in 10mm degree of depth hole on the selection standard piece.
(6) stepping rate of calibration scanner, assembling 1.5MHz face battle array probe and scanner.Set scanner and carry out linear uniform motion with 1mm/s, the scanning scope is 200mm.Start scanner and carry out scanning, record scanning result.Analyze the scanning result, sweeping signal and B at the static fan sweeping figure, the A that obtain sweeps and observes 0～20mm zone below the scanning surface among the figure two place's pores and crackle are everywhere arranged, for pore, make it be imaged on fan sweeping figure centre position, the move left and right probe, make the A of pore correspondence sweep the signal amplitude maximum, read the pore degree of depth; For crackle, make it be imaged on 30 ° of positions on the fan sweeping figure all the time, sweep among the figure at the B that obtains use on the UltraVision3.2R9 phased array operating system-that 6dB area size survey instrument carries out crack length is quantitative.
(7) choose 1.0MHz face battle array probe assembling ultrasonic phase array detection system.In UltraVision3.2R9 phased array operating system, revise partial parameters.1. focus on the setting of rule: probe is selected 1.0MHz face battle array TRL probe, 12 of main drive shaft number of wafers, wafer pitch 5mm, wafer size 4.5mm, 5 of driven shaft number of wafers, wafer pitch 6mm, wafer size 5.5mm; Voussoir wedge angle is set to 19.5 °, 0 ° of angle of a roof, 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 the 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 the corrected fan sweeping figure of dynamic volume, B at the detection interface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure; Add the corrected fan sweeping figure of static volume, B at the assay surface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure.Voussoir delay and longitudinal wave velocity calibration are carried out in 50mm degree of depth hole on the selection standard piece.
(8) stepping rate of calibration scanner, assembling 1.0MHz face battle array probe and scanner.Set scanner and carry out linear uniform motion with 1mm/s, the scanning scope is 200mm.Start scanner and carry out scanning, record scanning result.Analyze the scanning result, sweeping signal and B at the static fan sweeping figure, the A that obtain sweeps and observes among the figure that there is pore everywhere in 20～60mm zone below the scanning surface, wherein the 30mm of a place deep hole and 50mm deep hole are as shown in Figure 2, make pore appear at fan sweeping figure centre position, the move left and right probe, make the A of pore correspondence sweep the signal amplitude maximum, read the pore degree of depth.
(9) choose 0.5MHz face battle array probe assembling ultrasonic phase array detection system.In UltraVision3.2R9 phased array operating system, revise partial parameters.1. focus on the setting of rule: probe is selected 0.5MHz face battle array TRL probe, 10 of main drive shaft number of wafers, wafer pitch 6.5mm, wafer size 6.4mm, 5 of driven shaft number of wafers, wafer pitch 7mm, wafer size 6.9mm; Voussoir wedge angle is set to 20.5 °, 0 ° of angle of a roof, 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 the 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 the corrected fan sweeping figure of dynamic volume, B at the detection interface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure; Add the corrected fan sweeping figure of static volume, B at the assay surface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure.Voussoir delay and longitudinal wave velocity calibration are carried out in 80mm degree of depth hole on the selection standard piece.
(10) stepping rate of calibration scanner, assembling 0.5MHz face battle array probe and scanner.Set scanner and carry out linear uniform motion with 1mm/s, the scanning scope is 200mm.Start scanner and carry out scanning, record scanning result.Analyze the scanning result, sweep signal and B at the static fan sweeping figure, the A that obtain and sweep and observe the following 60mm in scanning surface among the figure and pore and six place's crackles are everywhere arranged to base surface area.For pore, make it be imaged on fan sweeping figure centre position, the move left and right probe makes the A of pore correspondence sweep the signal amplitude maximum, reads the pore degree of depth; For crackle, make it be imaged on the fan sweeping figure 30 ° of positions all the time as shown in Figure 3, sweep at the B that obtains use among the figure on the UltraVision3.2R9 phased array operating system-6dB area size survey instrument carries out crack length quantitatively as shown in Figure 4.
Circumferential test block utilizes phased array ultrasonic detection result and error as shown in Table 1 and Table 2 to above-mentioned phased array.
Table 1 phased array detects pore testing result and error analysis in the circumferential test block
Annotate: wherein the actual diameter of pore is 3mm.
Table 2 phased array detects crackle result and error analysis in the circumferential test block
Annotate: wherein the degree of depth is that the crackle of 83mm is that axially other is circumferentially and arranges.
(11) according to above-mentioned method the thick phased array of 92mm being detected axial test block detects, the fan sweeping figure that phased array detects 35mm and 60mm degree of depth hole correspondence on the axial test block weld seam as shown in Figure 5, phased array detects the strong position fan sweeping figure of the corresponding echo amplitude of axial test block one place's crackle as shown in Figure 6, and the corresponding B of this place's crackle sweeps figure as shown in Figure 7.Defectoscopy result and error are shown in table 3 and table 4.
Table 3 phased array detects pore testing result and error analysis in the axial test block
Annotate: wherein the actual diameter of pore is 3mm.
Table 4 phased array detects crackle result and error analysis on the axial test block weld seam
Annotate: wherein second place's degree of depth is that the crackle of 83mm is that axially other is circumferentially and arranges.
In the ASME BPVC XI volume nuclear power plant equipment inservice inspection rule coarse-grain austenite pipe welding seam ultrasonic examination checking is required to stipulate, if quantitatively the performance verification result satisfies following criterion, then inspection procedure, equipment and personnel are qualified by inspection aspect quantitatively.
(a) compare with the defective 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) compare with the defective actual grade, ultrasonic measurement depth of defect root-mean-square error is no more than 0.125in. (3.2mm).
Defective arrangement requirement in quantitative sample during ultrasonic measurement length.
(a) have 10 defectives at least.
(b) at least 1/3 of the defective sum, round, its degree of depth should be 5%-30% pipeline nominal wall thickness.At least 1/3 of the defective sum, round, its degree of depth should be greater than 30% pipeline nominal wall thickness.Have one and mostly be 10% of defective sum most at least, round, should be axial.
When this method detects crackle length has been carried out quantitatively, phased array detects that crackle adds up to 10 in the circumferential test block, and wherein the degree of depth has 4 at the crackle of 5-30% wall thickness crackle, and the degree of depth has 6 greater than the crackle of 30% pipeline nominal wall thickness, and wherein a place is axial crack; Phased array detects that crackle adds up to 10 in the axial test block, and wherein the degree of depth has 5 at the crackle of 5-30% wall thickness crackle, and the degree of depth has 5 greater than the crackle of 30% pipeline nominal wall thickness, and wherein a place is axial crack.Two test block defectives are arranged and all to be met the demands, according to (a) standard length is quantitatively carried out an acceptance inspection, phased array detect circumferential test block and axially in the test block the quantitative root-mean-square deviation of crack length be respectively 5.03mm and 6.01mm, all less than 19mm, satisfy standard-required.
Defective arrangement requirement in quantitative sample during ultrasonic measurement length.
(a) have 10 defectives at least.
(b) defective in the degree of depth quantitative sample group should be by following description
Remaining defective should belong to above-mentioned arbitrary classification.
When this method detects pore the degree of depth has been carried out quantitatively, phased array detects that pore adds up to 10 in the circumferential test block, 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 detects that pore adds up to 18 in the axial 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 defectives are arranged and all to be met the demands, according to (b) standard the degree of depth is quantitatively carried out an acceptance inspection, phased array detect circumferential test block and axially in the test block the quantitative root-mean-square deviation of the pore degree of depth be respectively 1.29mm and 1.31mm, all less than 3.2mm, satisfy standard-required.
The analysis showed that, phased array detects circumferential test block and phased array and detects in the axial test block that defective is arranged and testing result satisfies the ASME BPVC, prove the acceptance(check) aspect quantitatively of this inspection procedure and equipment, have and important meaning in the engineering application facet.
Claims (1)
1. method with phased array ultrasonic detection PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipe welding seam crudy is characterized in that: its adopts the detection system of the thick centrifugal casting austenic stainless steel main pipe welding seam of detection 66～99mm that comprises that Dynaray Lite ultrasonic phase array detector, UltraVision3.2R9 phased array operating system, low frequency twin crystal compressional wave face battle array probe, scanner and calibration block constitute; The measuring process that it adopts is as follows:
(1) material trademark, weld seam pattern, welding technology, size and the scope of understanding detected member; Detected member is carried out surface treatment: for surface in contact, the welding that moving freely or weakening ultrasonic vibration transmission that remove to hinder probe is spattered and is dripped and any coarse thing, guarantee that surface roughness Ra is no more than 6.3 μ m, it is mobile that probe is free at surface in contact completely; For face of weld, removing is blured flaw indication or can not be found irregularly shaped; Make weld seam sign, welding position tag line and position while welding reference point clearly on the detected member surface; According to the detected suitable couplant of material selection;
(2) in UltraVision3.2R9 phased array operating system, set up the sample mold type, tested regional longitudinal wave velocity, decay are measured;
(3) according to the longitudinal wave velocity in tested zone, the test result of decay, material properties in the edit model is selected suitable detection angles;
(4) to detected member weld seam and contiguous mother metal at least the scope of 10mm carry out the surveyed area layering at thickness direction, use 1.5MHz face battle array probe to detect following 0～20mm zone, scanning surface; 1.0MHz face battle array probe detects following 20～60mm zone, scanning surface; 0.5MHz face battle array probe detects the scanning following 60mm in surface to the bottom surface scope;
(5) connect 1.5MHz face battle array probe and Dynaray Lite ultrasonic phase array detector, assembling phased array detection system; The artificial horizontal through hole in following 0～20mm zone, distance surface on the selection standard piece, determine that according to the degree of depth of defective the focusing rule of phased array system, ultrasonic setting and machinery arrange, add the corrected fan sweeping figure of dynamic volume, B at the detection interface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure; Add the corrected fan sweeping figure of static volume, B at the assay surface of UltraVision3.2R9 phased array operating system and sweep that figure, C sweep figure and D sweeps figure; The phased array detection system is carried out voussoir delay and longitudinal wave velocity calibration;
(6) stepping rate of calibration scanner, assembling 1.5MHz face battle array probe and scanner; Set scanning path, resolution and scanning stepping rate; Start scanner detected member is carried out scanning, record scanning result; Analyze the scanning result, sweep figure and B sweeps the defect information that reads 0～20mm zone below the scanning surface among the figure at the static fan sweeping figure, the A that obtain, judge defect type and recording defect size; For the area-type defective that runs in the scanning process, measure defect length in conjunction with many views utilization-6dB method;
When (7) using 1.0MHz and 0.5MHz face battle array probe to detect the following 20～60mm in scanning surface and 60mm to base surface area respectively, artificial horizontal through hole and the 60mm apart from following 20～60mm zone, surface carries out the calibration of phased array system to the artificial horizontal through hole of base surface area on the selection standard piece respectively, and all the other step method go on foot identical with (5), (6).
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