CN110006995A - For the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound - Google Patents
For the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/267—Welds
- G01N2291/2675—Seam, butt welding
Abstract
For the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound, include the following steps: S1: preparing calibration block, the horizontal through-hole of multiple and different depth is opened up in calibration block；S2: angle probe type selecting；S3: with the different physical depth D in the difference single calibration block of sector scan of phased array supersonic technologypHorizontal through-hole, and obtain the incidence point of corresponding angle probe to horizontal through-hole angle, θ, sound path SrData；S4: fitting of a polynomial is carried out to above-mentioned data, obtains mapping relations function；S5: it is whether reasonable that mapping relations function is verified by verifying test block, while judging to verify whether test block is applicable in this method；S6: the non-homogeneous metal thick plate weld seam of the phased array supersonic technology scanning velocity of sound is used.The present invention can look into corresponding physical depth by the way that mapping relations function is counter, reduce the depth error with phased array ultrasonic detection technology detection heterogeneity material defect when being actually used in the non-homogeneous metal thick plate weld seam detection of the gradually changeable velocity of sound.
Description
Technical field
The invention belongs to material field of measuring technique, be related to using ultrasound examination weld seam, in particular to it is a kind of to be used for gradual change
The property non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the velocity of sound.
Background technique
With the continuous development of shipping business, the cargo dead-weight of Large Container Ship is also constantly soaring, from 8000TEU collection earlier
Vanning ship and it is developed to current 20000TEU container ship, advancing by leaps and bounds for Large Container Ship has benefited from flying for hull material
Speed development.Currently, the steel more than important features such as deck, the outside plates of 18000TEU container ship are all made of a kind of specially treated
Rolled steel, which is detected, and learns the steel grade that it is a kind of non-homogeneous material of acoustic beam, and welded detection exists smart
Spend poor problem.
TMCP steel is a kind of thermomechanical control technology of use to billet heating temperature, rolling temperature, deflection, rate of deformation
Steel made of reasonable control etc. all Alternatives is processed.TMCP hardness of steel height, good toughness, comprehensive mechanical with higher
Can, it is therefore widely used in the construction of the Large Container Ships such as 18000TEU and 20000TEU.
But TMCP steel the characteristics of anisotropy is made it have due to its special process, and anisotropy seriously affects ultrasound
To the accuracy of defect dipoles when wave detects.At present in TMCP steel non-destructive testing, mainly examined using ultrasonic wave oblique incidence method
In survey, with do not have in anisotropy steel the variation of refraction angle or echo amplitude with the direction of propagation (relative to rolling direction it is longitudinal or
Variation laterally), but the variation of anisotropic steel ultrasound direction of wave travel is more significant.Such as: refraction angle can be with the direction of propagation
And change；Refraction angle can be larger relative to nominal angle on rolling direction (L to), and when perpendicular to rolling direction (T to)
It then can be smaller；The probe for being 60 ° with nominal angle is almost equal to the echo height obtained with T to measurement in L；Use nominal angle
Can be lower in the echo height that L is measured upwards for 70 ° of probes, and maximum amplitude position is very unintelligible.
During on-site test, ultrasonic detection technology is generally divided into three steps and removes calibration instrument: being tried first using IIW
Block determines spread speed of the ultrasonic wave in steel, sees Fig. 1；Secondly entering for ultrasonic wave steel is determined using TMCP steel reference block
Firing angle is shown in Fig. 2: finally drawing the DAC curve of different depth in reference block, sees Fig. 3.For different characterization processes, school
Quasi- technique is also different.
Common detection method disadvantage is obvious at present: firstly, on-site test technique is required to measure material sound using IIW test block
Speed, this calibration method are generally used for isotropism, velocity of sound homogeneity material, and metal material non-uniform for the velocity of sound,
Ultrasonic wave is affected by various factors in internal communication process, and propagation path is there are curved possibility, within the scope of different depth
Its true propagation speed is also inconsistent, therefore removes detection heterogeneity material using the means of calibration homogeneity material,
Positioning on positioning especially depth direction will cause maximum error.
Secondly, steel biggish for thickness, the propagation distance of two subwaves is larger, and ultrasonic wave is propagated energy and reduced more
Obviously, larger for the sensitivity decline of conventional Ultrasound detection technique reception flaw echo, in addition test object is non-homogeneous again
Property material, internal grain causes to reflect to sound wave, may cause when detecting big thickness weld seam, and lesser flaw echo and clutter are mutual
It mutually interferes, the judgement of defect physical location is affected greatly.For steel weld seam lesser for thickness, consequence can be neglected
Slightly, but TMCP steel is chiefly used in Large Container Ship, and using plate thickness in 40mm or more, the error of depth, which will lead to, reprocesses operation
Difficulty increase, cause shipowner to cause to query to the reliability of detection.
The thick-walled metal material weld for non-homogeneous material can be fully solved without open report both at home and abroad at present
Acoustic beam measurement and testing calibration method, the method that each side professional also finds solution in effort.
Summary of the invention
The present invention is in view of the above-mentioned problems, provide a kind of for the non-homogeneous metal thick plate welding-seam phased array supersonic of the gradually changeable velocity of sound
Detection method.
The purpose of the present invention can be realized by following technical proposals: for the non-homogeneous metal thick plate weldering of the gradually changeable velocity of sound
Phased array ultrasonic detecting method is stitched, is included the following steps:
S1: preparation rolling direction and/or the calibration block perpendicular to rolling direction, calibration block are the non-homogeneous metal of the velocity of sound
Manufactured rectangular block opens up the horizontal through-hole of multiple and different depth in calibration block；
S2: angle probe type selecting；
S3: with the different physical depth D in the difference single calibration block of sector scan of phased array supersonic technologypIt is horizontal logical
Hole, and the incidence point of corresponding angle probe is obtained to horizontal through-hole angle, θ, sound path SrData；
S4: to the physical depth D of all horizontal through-holespAnd the incidence point of angle probe is to horizontal through-hole angle, θ, sound path SrNumber
According to fitting of a polynomial is carried out, mapping relations function is obtained；
S5: it is whether reasonable that mapping relations function is verified by verifying test block, while judging to verify whether test block is applicable in the party
Method；
S6: the non-homogeneous metal thick plate weld seam of the phased array supersonic technology scanning velocity of sound is used.
Further, in step S1, the horizontal through-hole of multiple and different depth in calibration block is arranged to a column.
Further, in step S2, it is based on detection zone all standing principle, the detection angle range of probe is determined, uses
Chip number and starting chip, further according to fixed probe detection angle range, use chip number, starting chip, with
And phased array ultrasonic detection standard, determine the model of probe and the type of voussoir.
Further, step S3 includes the following steps:
S3a: the parameter of phased array instrument is arranged in connection phased array instrument and angle probe；
S3b: voussoir delay is calibrated in IIW test block；
S3c: angle probe is placed in calibration block, is detected to a horizontal through-hole in calibration block, in length direction
Upper mobile angle probe finds the echo-signal of the horizontal through-hole to suitable position, and inclined at a certain angle in detection angle range
Turn wave beam and carry out sector scan, when finding maximum echo-signal, records the incidence point of angle probe to the horizontal through-hole angle, θ, sound
Journey Sr, repetitive operation obtains detecting corresponding data when other horizontal through-holes.
Further, in step S3a, the parameter for needing to be arranged on phased array instrument includes the initial detecting velocity of sound, probe
Type, scanning mode, detection angle range, gain, excitation voltage, filter range.
Further, in step S4, mapping relations function includes at least one of following: physical depth value DpWith sound path Sr
Mapping relations function Dp=f (Sr,θ)；In the physical depth D of known a certain horizontal through-holepUnder the conditions of sound path SrWith angle, θ
Mapping relations function Sr=f (Dp,θ)|Dp=D0, D1, D2 ... }, and whereby interpolation obtain in special angle θiUnder the conditions of sound path
SrWith physical depth DpCorrespondence table；In special angle θiUnder the conditions of physical depth value DpWith sound path SrMapping relations function Dp
=f (Sr, θ) | θ=θi。
Further, in step S5, the calibration block or other materials characteristic in verifying test block optional step S1 are identical
And the test block of known each horizontal via depth, it is D with the physical depth in the verifying test block of phased array supersonic technology sector scanv
Horizontal through-hole, obtain a certain special angle θiWhen sound path value Sr, θ thereiniNot with any angle, θ phase obtained in step S3c
Together, the physical depth D of horizontal through-hole is obtained by the mapping relations function in step S4p, compare DpAnd DvError amount, if DpAnd Dv
Error be less than or equal to physical depth Dv10% or 2mm, illustrate that mapping relations function is effective and reasonable, the verifying test block
It is applicable in this method, otherwise re-starts step S3c and S4, and verification is compared again, if DpAnd DvError amount be consistently greater than Dv's
10% or 2mm illustrates that the sonic velocity change of the verifying test block is non-gradually changeable, is not suitable for this method.
Compared with prior art, beneficial effects of the present invention: emitting the rule and feature with reflection using ultrasonic wave, in conjunction with
Phased array ultrasonic detection sectoring technology, the sound path of the subangle measurement horizontal through-hole of different depth in the uneven material of the velocity of sound,
The actual depth of sound path, angle, horizontal through-hole is established into mapping relations function by experimental data by fitting algorithm, for practical
When phased array detects, corresponding physical depth is looked by the way that the mapping relations function is counter, reduces and is examined with phased array ultrasonic detection technology
Survey the depth error of heterogeneity material defect.This method does not pursue practical road of the ultrasonic wave in non-homogeneous metal thick plate weld seam
Diameter and the velocity of sound, but be that guiding counter can push away as long as the defect finally detected provides corresponding angle and sound path with result
Actual physics depth.Phased array ultrasonic detection technology itself can detect missing inspection caused by energy is reduced because of energy attenuation by improving
The mode of problem, sectoring can utmostly detect lesser defect, have higher sensitivity.Moreover, different
The sonic velocity change of the non-homogeneous metal material of the velocity of sound is all different, and this method can not be limited by metal material, if sound wave can
It can satisfy up to property, strong operability, application easy to spread.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of IIW test block.
Fig. 2 is the structural schematic diagram of TMCP steel reference block.
Fig. 3 is the probe placement position of TMCP steel and the schematic diagram of corresponding DAC curve.
Fig. 4 is flow diagram of the invention.
Fig. 5 is the structural schematic diagram of the TMCP steel calibration block of one embodiment of the invention.
Fig. 6 is the three-dimensional mapping relations figure of one embodiment of the invention
Specific embodiment
Below in conjunction with the attached drawing specific embodiment that the present invention will be described in detail, those skilled in the art is made to become apparent from geography
How solution practices the present invention.Although describing the present invention in conjunction with its preferred embodiment, these embodiments are
It illustrates, is not intended to limit the scope of the invention.
For the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound, referring to fig. 4, including walk as follows
It is rapid:
S1: preparation rolling direction and/or the calibration block perpendicular to rolling direction, calibration block are the non-homogeneous metal of the velocity of sound
Manufactured rectangular block, the horizontal through-hole of multiple and different depth is opened up in calibration block, and multiple horizontal through-holes may be disposed to a column.It needs
Illustrate, in actual fabrication process, according to use demand, the horizontal number of openings of preparation is more, then subregion is more, detection
The velocity of sound arrived is more accurate, and detection accuracy is higher, but the disadvantage is that data volume is more, operation difficulty is bigger.
S2: using angle probe, is based on detection zone all standing principle, that is, it is whole to be necessary to ensure that ultrasonic wave acoustic beam covers as far as possible
A welded seam area, the detection angle range for determining probe, the chip number used and starting chip, further according to fixed probe
Detection angle range, the chip number used, starting chip and phased array ultrasonic detection standard determine the model and wedge of probe
The type of block.
S3: with the different physical depth D in the difference single calibration block of sector scan of phased array supersonic technologypIt is horizontal logical
Hole, and the incidence point of corresponding angle probe is obtained to horizontal through-hole angle, θ, sound path SrData include the following steps:
S3a: connection phased array instrument and angle probe are arranged the parameter of phased array instrument, phased array instrument are made to be in work
State, wherein the parameter for needing to be arranged mainly include the initial detecting velocity of sound, probe type, scanning mode, detection angle range,
Gain, excitation voltage, filter range etc..
S3b: postponed in IIW test block (uniform material) using the calibration function calibration voussoir of phased array instrument.
S3c: angle probe is placed in calibration block, is detected to a horizontal through-hole in calibration block, in length direction
Upper mobile angle probe finds the echo-signal of the horizontal through-hole to suitable position, and (the example at a certain angle in detection angle range
Such as, every 5 degree) deflection wave beam carries out sector scan, when finding maximum echo-signal, the incidence point of angle probe is recorded to the cross
Through-hole angle, θ, sound path Sr, wherein the angle, θ of the incidence point of angle probe to the horizontal through-hole can directly measure to obtain, sound path SrIt can
It is obtained with directly being read from phased array instrument；Repetitive operation obtains detecting corresponding data when other horizontal through-holes.
S4: to the physical depth D of all horizontal through-holespAnd the incidence point of angle probe is to horizontal through-hole angle, θ, sound path SrNumber
According to fitting of a polynomial is carried out, mapping relations function is obtained, mapping relations function therein includes at least one of following: physical depth
Value DpWith sound path SrMapping relations function Dp=f (Sr,θ)；In the physical depth D of known a certain horizontal through-holepUnder the conditions of sound path
SrWith the mapping relations function S of angle, θr=f (Dp,θ)|Dp=D0, D1, D2 ... }, and whereby interpolation obtain in special angle θiItem
Sound path S under partrWith physical depth DpCorrespondence table；In special angle θiUnder the conditions of physical depth value DpWith sound path SrMapping
Relation function Dp=f (Sr, θ) | θ=θi。
S5: it is whether reasonable that mapping relations function is verified by verifying test block, while judging to verify whether test block is applicable in the party
Method:
Verify that calibration block in step S1 can be selected in test block or other materials characteristic is identical and known each horizontal through-hole is deep
The test block of degree is D with the physical depth in the verifying test block of phased array supersonic technology sector scanvHorizontal through-hole, obtain it is a certain
Special angle θiWhen sound path value Sr, θ thereiniIt is not identical as any angle, θ obtained in step S3c, by step S4
Mapping relations function obtains the physical depth D of horizontal through-holep, compare DpAnd DvError amount, if DpAnd DvError be less than or equal to object
Manage depth Dv10% or 2mm, illustrate mapping relations function be it is effective and reasonable, which is applicable in this method, otherwise
Step S3c and S4 are re-started, and verification is compared again, if DpAnd DvError amount be consistently greater than Dv10% or 2mm, explanation
The sonic velocity change of the verifying test block is non-gradually changeable, is not suitable for this method.
S6: the non-homogeneous metal thick plate weld seam of the phased array supersonic technology scanning velocity of sound is used.In phased array instrument performance and function
Under conditions of satisfaction, phased array instrument can be set as to the identical parameters of step S3a and record these parameters, then detected
And it records and detects the incidence point for obtaining angle probe to horizontal through-hole angle, θ, sound path SrData pass through the mapping relations letter in step S4
Number obtains respective angles θ and sound path SrLower corresponding physical depth Dp, i.e. the depth of the weld defect.
Calibration block therein has the advantages that 1, can be used for establishing between incident angle, sound path value and actual depth
Mapping relations function；2, flexibility is stronger, can independently modify horizontal through-hole according to the demand of different detection levels and examination grade
Depth and pore size, can be improved or suitably reduce corresponding detection accuracy, meet in different industries and different structure
Testing requirements.TCG the or ACG quantitation curves that the calibration block can also be used for phased array ultrasonic detection are drawn and conventional Ultrasound detection
Sound velocity calibration and ACG Drawing of Curve.In addition, the face of the contact probe head in calibration block is processed as pipe weld seam detection
Different curvature, so that it may meet the requirement of tubing weld seam detection.
An embodiment used below illustrates the step S1 in the above method to step S5.
S1: the TMCP steel calibration block of one rolling direction of preparation, as shown in figure 5, long 500mm, high 50mm, thick 60mm,
On length direction at the 100mm of one end, it is 3mm that diameter is respectively prepared at 1/5,2/5,3/5, the 4/5 of short transverse
Horizontal through-hole.
S2: based on detection all standing principle, 5L64 linear array probe 55S voussoir is selected, and define sector scan angle
Range is 35 °~65 °, and exciting wafer quantity 16, starting wafer number is 1.
S3: respectively testing the horizontal through-hole of different depth in TMCP test block using Olympus MX2 phased array instrument,
And record corresponding reading, the specific steps are as follows:
S3a: Olympus MX2 phased array instrument being connect with 5L64 linear array probe, and installs probe voussoir, setting
The basic parameter of phased array instrument, the initial velocity of sound are set as 3230m/s, match probe type, covering of the fan scanning, excitation voltage
110V, filter range 2.5MHz~7.5MHz etc..
S3b: the calibration function calibration in IIW test block using phased array instrument obtains voussoir and postpones 28.45 μ s, and confirms
These parameters variation useless in entire test process.
S3c: angle probe is placed in calibration block, is detected first to the horizontal through-hole of 12mm buried depth (T*1/5), in length
Mobile angle probe finds the echo-signal of the horizontal through-hole to suitable position on direction, and inclined every 5 degree in detection angle range
Turn wave beam and carry out sector scan, when finding maximum echo-signal, records the incidence point of angle probe to the horizontal through-hole angle, θ, sound
Journey Sr.Repetitive operation obtains detecting corresponding data when other horizontal through-holes.Table 1 show the horizontal through-hole of different buried depth in different scannings
The sound path value obtained under angle.
The sound path value that the horizontal through-hole of 1 different buried depth of table obtains under different scanning angles
| Sr | 35° | 40° | 45° | 50° | 55° | 60° | 65° |
| 12mm | 4.94 | 10.96 | 11.72 | 15.00 | 20.99 | 26.65 | 32.94 |
| 24mm | 19.41 | 27.93 | 31.46 | 34.75 | 41.53 | 52.62 | 62.69 |
| 36mm | 33.90 | 43.71 | 48.59 | 53.96 | 61.90 | 76.55 | 93.38 |
| 48mm | 48.26 | 58.74 | 64.41 | 72.68 | 82.23 | 99.64 | 123.83 |
Method 1: bivariate polynomial fitting is directly carried out:
S41: directly above-mentioned angle, sound path and buried depth are fitted by Matlab, obtain corresponding function and three-dimensional
Mapping relations figure (see Fig. 6) is as follows:
Dp=p00+p10* θ+p01*Sr+p20* θ2+p11*θ*Sr+p02*Sr2+p30*θ3+
p21*θ2*Sr+p12*θ*Sr2+p03*Sr3
Wherein:
P00=31.75
P10=-8.082
P01=18.63
P20=0.3557
P11=-4.578
P02=0.5798
P30=-0.9749
P21=-0.03725
P12=-0.27
P03=-0.08089
S51: respectively under the conditions of 52 ° and 58 °, measuring the horizontal through-hole of 4 different depths, the sound path value Sr of acquisition
It is as shown in table 2:
The sound path value measured under the conditions of 2 52 ° and 58 ° of table
| 12mm | 24mm | 36mm | 48mm | |
| 52° | 17.72 | 38.28 | 57.45 | 75.99 |
| 58° | 23.59 | 46.86 | 69.40 | 91.64 |
Above-mentioned sound path value and angle value are substituted into fitting function, obtain revised depth value, i.e. table 3.
The horizontal via depth proof list (method 1) of table 3
| Depth | T*1/5 | T*2/5 | T*3/5 | T*4/5 |
| Nominal value | 12 | 24 | 36 | 48 |
| 52° | 12.17 | 24.07 | 35.72 | 47.36 |
| 58° | 12.67 | 24.35 | 36.13 | 47.97 |
As can be seen that can be caused to because of acoustic velocity of material variation by way of bivariate polynomial fitting in from the above
Measured value be modified, corresponding result and nominal value error are smaller, meet the requirement of actual use.
Method 2: then sound path Sr and angle, θ relationship first under the conditions of mapping different depth are obtained specific by difference
The mapping relations of physical depth value Dp and sound path Sr under angle.
S42: fitting of a polynomial, typical polynomial construction form are carried out to sound path and angle are as follows:
Sr=A* θ3+B*θ2+C*θ+D
The data of 12mm, 24mm, 36mm and 48mm are fitted respectively, obtain corresponding multinomial coefficient such as 4 institute of table
Show.
4 Sr- θ coefficient of polynomial fitting table of table
It is possible to further obtain the mapping relations between depth value and sound path under particular detection angle:
Dp=E*Sr2+F*Sr+G
5 Dp-Sr coefficient of polynomial fitting table of table
| 52° | 58° | |
| E | 0.0008 | 0.0003 |
| F | 0.5407 | 0.4984 |
| G | 2.1402 | 0.0843 |
S52: sound path value (table corresponding to the horizontal through-hole of different buried depth of acquisition will be measured under the conditions of 52 degree and 58 degree respectively
2) it substitutes into the multinomial of above-mentioned fitting, corresponding correction value can be obtained.
The horizontal via depth proof list (method 2) of table 6
| Depth | T*1/5 | T*2/5 | T*3/5 | T*4/5 |
| Nominal value | 12 | 24 | 36 | 48 |
| 52° | 11.99 | 24.03 | 35.97 | 48.01 |
| 58° | 11.98 | 24.06 | 35.94 | 48.02 |
As can be seen that (initially setting up Sr- θ mapping relations by way of fitting of distribution, then establishing in from the above
Dp-Sr corresponding relationship) can also to changing because of acoustic velocity of material caused by measured value be modified, corresponding result and nominal value miss
Difference is smaller, meets the requirement of actual use.
It should be pointed out that can also have the embodiment of a variety of transformation and remodeling for the present invention through absolutely proving,
It is not limited to the specific embodiment of above embodiment.Above-described embodiment as just explanation of the invention, rather than to this
The limitation of invention.In short, protection scope of the present invention should include that those are apparent to those skilled in the art
Transformation or substitution and remodeling.
Claims (7)
1. being used for the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound, which is characterized in that including as follows
Step:
S1: preparation rolling direction and/or the calibration block perpendicular to rolling direction, calibration block are made of the non-homogeneous metal of the velocity of sound
Rectangular block, the horizontal through-hole of multiple and different depth is opened up in calibration block；
S2: angle probe type selecting；
S3: with the different physical depth D in the difference single calibration block of sector scan of phased array supersonic technologypHorizontal through-hole, and obtain
Corresponding angle probe incidence point to horizontal through-hole angle, θ, sound path SrData；
S4: to the physical depth D of all horizontal through-holespAnd the incidence point of angle probe is to horizontal through-hole angle, θ, sound path SrData into
Row fitting of a polynomial obtains mapping relations function；
S5: it is whether reasonable that mapping relations function is verified by verifying test block, while judging to verify whether test block is applicable in this method；
S6: the non-homogeneous metal thick plate weld seam of the phased array supersonic technology scanning velocity of sound is used.
2. according to claim 1 be used for the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound,
It is characterized in that, the horizontal through-hole of multiple and different depth in calibration block is arranged to a column in step S1.
3. according to claim 1 be used for the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound,
It is characterized in that, it is based on detection zone all standing principle in step S2, the detection angle range for determining probe, the chip used
Number and starting chip, further according to the detection angle range of fixed probe, the chip number used, starting chip and phased
Battle array Ultrasonic Testing Standards, determine the model of probe and the type of voussoir.
4. according to claim 1-3 for the non-homogeneous metal thick plate welding-seam phased array supersonic inspection of the gradually changeable velocity of sound
Survey method, which is characterized in that step S3 includes the following steps:
S3a: the parameter of phased array instrument is arranged in connection phased array instrument and angle probe；
S3b: voussoir delay is calibrated in IIW test block；
S3c: angle probe is placed in calibration block, is detected to a horizontal through-hole in calibration block, is moved in the longitudinal direction
Dynamic angle probe finds the echo-signal of the horizontal through-hole to suitable position, and the deflection wave at a certain angle in detection angle range
Shu Jinhang sector scan records the incidence point of angle probe to the horizontal through-hole angle, θ, sound path S when finding maximum echo-signalr,
Repetitive operation obtains detecting corresponding data when other horizontal through-holes.
5. according to claim 4 be used for the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound,
It is characterized in that, the parameter for needing to be arranged on phased array instrument includes the initial detecting velocity of sound, probe type, scanning in step S3a
Mode, detection angle range, gain, excitation voltage, filter range.
6. according to claim 4 be used for the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound,
It is characterized in that, mapping relations function includes at least one of following: physical depth value D in step S4pWith sound path SrMapping close
It is function Dp=f(Sr,θ)；In the physical depth D of known a certain horizontal through-holepUnder the conditions of sound path SrWith the mapping relations letter of angle, θ
Number Sr=f(Dp,θ)|Dp={D0,D1,D2,…}, and whereby interpolation obtain in special angle θiUnder the conditions of sound path SrAnd physical depth
DpCorrespondence table；In special angle θiUnder the conditions of physical depth value DpWith sound path SrMapping relations function Dp=f(Sr,θ)|θ=
θi。
7. according to claim 6 be used for the non-homogeneous metal thick plate welding-seam phased array supersonic detection method of the gradually changeable velocity of sound,
It is characterized in that, the calibration block or other materials characteristic in verifying test block optional step S1 are identical and known each in step S5
The test block of a horizontal via depth is D with the physical depth in the verifying test block of phased array supersonic technology sector scanvIt is horizontal logical
Hole obtains a certain special angle θiWhen sound path value Sr, θ thereiniIt is not identical as any angle, θ obtained in step S3c, lead to
The mapping relations function crossed in step S4 obtains the physical depth D of horizontal through-holep, compare DpAnd DvError amount, if DpAnd DvMistake
Difference is less than or equal to physical depth Dv10% or 2mm, illustrate mapping relations function be it is effective and reasonable, the verifying test block be applicable in
Otherwise this method re-starts step S3c and S4, and verification is compared again, if DpAnd DvError amount be consistently greater than Dv10%
Or 2mm, illustrate that the sonic velocity change of the verifying test block is non-gradually changeable, is not suitable for this method.
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