CN207396414U - Boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block - Google Patents
Boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block Download PDFInfo
- Publication number
- CN207396414U CN207396414U CN201721218270.5U CN201721218270U CN207396414U CN 207396414 U CN207396414 U CN 207396414U CN 201721218270 U CN201721218270 U CN 201721218270U CN 207396414 U CN207396414 U CN 207396414U
- Authority
- CN
- China
- Prior art keywords
- test block
- boiler
- special test
- steel plates
- 12cr1mov
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A kind of boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block,Test block material is 12Cr1MoV,Scale lengths × width × thickness is 500mm × 400mm × 4mm,It is respectively 0.2mm for making the 9 of DAC curves corrosion pit depths,0.5mm,1mm,1.5mm,2mm,2.5mm,3mm,3.5mm,4mm,Along test block length direction, in width centre position, homogenous linear is distributed etch pit successively from shallow to deep,Each etch pit is at a distance of 50mm,And the minimum defect that the test block can simulate is the etch pit that depth is steel plate wall thickness 5%,Ultrasound detection is carried out after instrument is adjusted and is verified using this test block,The defects of being cheated to boiler 12Cr1MoV steel plates inner wall corrosion recall rate significantly improves,And the defects of to etch pit, positions and quantifies accurately,Inspection result is true,Reliably.
Description
Technical field
The utility model is related to boiler plate inner wall corrosion hole ultrasound detection fields, and in particular to a kind of boiler 12Cr1MoV
Steel plate inner wall corrosion cheats ultrasound detection Special test block.
Background technology
At present, the non-destructive testing technology of domestic and international inner wall corrosion hole defect mainly has low frequency electromagnetic detection technique and ultrasound to examine
Survey technology.
Low frequency electromagnetic detection technique uses discrete excitation and receiving sensor, is excited under relatively low frequency (≤10Hz)
An alternating electromagnetic field is generated, and penetrates measured material, corresponding information treatment technology is worked out according to defect mechanism of production and is shown
Show means, so as to draw defect information.The factor for influencing low frequency electromagnetic detection data accuracy is main in actual mechanical process
Show as two kinds：One is clutter pollutes, the second is the detection speed of detection probe.Boiler exam is typically to borrow boiler maintenance machine
It can carry out, so inevitably detection work and other service works are carried out at the same time, and low frequency electromagnetic detection needs a peace and quiet
Environment but Overhaul site because maintenance need, certainly exist the electromechanical works such as sanding machine, it is also possible to have electric welding machine
In operation, sanding machine " piping " sound ear-piercing when working and the high strong electromagnetic of the electric welding machine work starting the arc and the generation in welding process
Ripple, which generates low frequency electromagnetic detection process, inevitably to be influenced.Site environment interference is too many, numerous interference signals and low frequency
Electromagnetic signal superposition causes measured signal distortion.Low frequency electromagnetic detection speed be to detection quality another big influence factor,
The detection speed requirement of low frequency electromagnetic detection probe is preferably maintained in uniform detection.In actually detected environment, bad environments are detected,
By limited space, manual operations is needed under existence conditions, it is impossible to keep uniformly detection in detection process；Low-frequency electronic detection
Precision is low, and tiny etch pit can not be detected accurately, and the minimum defect that can be detected is that depth is steel plate wall thickness 30%
Etch pit.
In view of low frequency electromagnetic detection technique has more than limitation, select ultrasonic detecting technology that there is detection sensitivity more
Height quantifies and positions more accurately and reliably advantage.At this stage, the country there is no the ultrasound inspection of boiler 12Cr1MoV steel plates inner wall corrosion hole
Special test block is surveyed, accurately boiler 12Cr1MoV steel plates inner wall corrosion can not be cheated and carry out ultrasound detection, therefore research and develop pot
Stove 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block, there is important practical value and dissemination.
The content of the invention
In order to solve the above-mentioned problems of the prior art, the purpose of this utility model is to provide a kind of boilers
12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block, surpasses after instrument is adjusted and is verified using this test block
The defects of sound detection, boiler 12Cr1MoV steel plates inner wall corrosion is cheated, recall rate was high, and to etch pit the defects of positions and quantitative accurate,
Inspection result is true, reliable.
In order to achieve the above object, the utility model adopts the following technical solution：
A kind of boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block, and the Special test block is plate, and one
Face is provided with to make 9 etch pits of DAC curves along its length in the centre position of width successively, and depth is respectively
0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm and 4mm, this 9 etch pits are made by semi-spherical bit
It forms, the minimum defect simulated is the etch pit that depth is steel plate wall thickness 5%；Homogenous linear divides etch pit successively from shallow to deep
Cloth, adjacent etch pit avoid interfering with each other between etch pit when scanning adjustment and tester at a distance of 50mm.
The material of the Special test block, thickness are identical with boiler 12Cr1MoV steel plate material objects.
The acoustical behavior of the Special test block is identical with the acoustical behavior of boiler 12Cr1MoV steel plate material objects.
The Special test block is the plate that length x width x thickness is 500mm × 400mm × 4mm.
Compared to the prior art compared with the utility model possesses following advantage：
1st, can ultrasound inspection be cheated in boiler 12Cr1MoV steel plates inner wall corrosion with accurate alignment angle probe shear wave using this test block
Velocity of sound during survey.
2nd, the position that can be cheated using this test block with Accurate Determining boiler 12Cr1MoV steel plates inner wall corrosion.
3rd, the depth that can be cheated using this test block with Accurate Determining boiler 12Cr1MoV steel plates inner wall corrosion.
4th, the defects of boiler 12Cr1MoV steel plates inner wall corrosions hole can be improved using this test block recall rate, and defect
It positions and quantitative accurate.
Description of the drawings
Fig. 1 cheats ultrasound detection Special test block front view for a kind of boiler 12Cr1MoV steel plates inner wall corrosion of the utility model,
Unit is mm in figure.
Fig. 2 cheats ultrasound detection Special test block sectional view for a kind of boiler 12Cr1MoV steel plates inner wall corrosion of the utility model,
Unit is mm in figure.
Specific embodiment
Before ultrasound detection being cheated below in conjunction with attached drawing and this Special test block of application to boiler 12Cr1MoV steel plates inner wall corrosion
Instrument adjusts and the specific embodiment of verification, and the utility model is described in further detail.
As depicted in figs. 1 and 2, a kind of boiler 12Cr1MoV steel plates inner wall corrosion hole special examination of ultrasound detection of the utility model
Block, the Special test block are plate, are provided with to make DAC curves on one side successively in the centre position of width along its length
9 etch pits, depth are respectively 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, this 9 corrode
Hole is made by semi-spherical bit, and the minimum defect simulated is the etch pit that depth is steel plate wall thickness 5%；Test block specification
Length x width x thickness is 500mm × 400mm × 4mm, and homogenous linear is distributed etch pit successively from shallow to deep, adjacent etch pit
At a distance of 50mm, interfering with each other between etch pit when scanning adjustment and tester is avoided.
During detection, first, using Special test block accurate alignment angle probe shear wave in boiler 12Cr1MoV steel plate inner wall corrosions
Cheat refraction angle during ultrasound detection, it is known that the forward position of probe is A, and the probe 1 in Fig. 1 is placed near test block left end, is looked for
Echo of maximum of outlet angle bottom surface, at this moment 1 front end of measuring probe to test block left end distance is L, due to test block thickness
For 4mm, then refraction angle numerical value is inputted ultrasonic instrument parameter by the refraction angle β=arctg that pops one's head in [(L+A)/4].It secondly, will be in Fig. 1
Probe 2 be placed in depth be respectively 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm etch pit the back of the body
Face top position looks for respective highest back wave to make DAC curves successively, to determine the sensitivity of ultrasound detection.Finally, it is sharp
Carry out ultrasound detection with the instrument calibrated and probe are in kind to boiler 12Cr1MoV steel plates, reach when the wave amplitude of etch pit or
When person is more than DAC curves, then the etch pit that the equivalent size of the etch pit is simulated up to or over the Special test block is can determine that,
And then the inner wall corrosion of discovery can be cheated and be accurately positioned and quantify.This test block is cheated applied to boiler 12Cr1MoV steel plates inner wall corrosion
Before ultrasound detection instrument adjustment and verification, using the Special test block carry out ultrasound detection it can be found that minimum defect be depth
For the etch pit of steel plate wall thickness 5%.
Claims (4)
1. a kind of boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block, it is characterised in that：The Special test block
For plate, it is provided with to make 9 etch pits of DAC curves, depth on one side successively in the centre position of width along its length
Degree is respectively 0.2mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm and 4mm, this 9 etch pits are by hemispherical
Drill bit is made, and the minimum defect simulated is the etch pit that depth is steel plate wall thickness 5%；, etch pit is from shallow to deep successively
Homogenous linear is distributed, and adjacent etch pit avoids interfering with each other between etch pit when scanning adjustment and tester at a distance of 50mm.
2. a kind of boiler 12Cr1MoV steel plates inner wall corrosion hole ultrasound detection Special test block according to claim 1, special
Sign is：The material of the Special test block, thickness are identical with boiler 12Cr1MoV steel plate material objects.
3. a kind of boiler 12Cr1MoV steel plates inner wall corrosion hole ultrasound detection Special test block according to claim 1, special
Sign is：The acoustical behavior of the Special test block is identical with the acoustical behavior of boiler 12Cr1MoV steel plate material objects.
4. a kind of boiler 12Cr1MoV steel plates inner wall corrosion hole ultrasound detection Special test block according to claim 1, special
Sign is：The Special test block is the plate that length x width x thickness is 500mm × 400mm × 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721218270.5U CN207396414U (en) | 2017-09-21 | 2017-09-21 | Boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721218270.5U CN207396414U (en) | 2017-09-21 | 2017-09-21 | Boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207396414U true CN207396414U (en) | 2018-05-22 |
Family
ID=62403715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721218270.5U Active CN207396414U (en) | 2017-09-21 | 2017-09-21 | Boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207396414U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406641A (en) * | 2018-12-06 | 2019-03-01 | 中国航发贵州黎阳航空动力有限公司 | A kind of curved surface longitudinal wave ultrasonic wave reference block calibration method |
-
2017
- 2017-09-21 CN CN201721218270.5U patent/CN207396414U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406641A (en) * | 2018-12-06 | 2019-03-01 | 中国航发贵州黎阳航空动力有限公司 | A kind of curved surface longitudinal wave ultrasonic wave reference block calibration method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201107301Y (en) | Non-destructive test standard block | |
| KR101163549B1 (en) | Calibration block for phased-array ultrasonic inspection | |
| CN105628610A (en) | Integration equipment and detection method for evaluating coating bonding strength based on interface fracture toughness | |
| CN104501750B (en) | A kind of method of ultrasonic phase array measurement U rib weld penetrations | |
| CA2711303A1 (en) | Method for the non-destructive testing of a test specimen by means of ultrasound as well as a device for this purpose | |
| CN105021142B (en) | The measuring method and equipment therefor of a kind of laser lap weld width | |
| KR101163554B1 (en) | Calibration block for phased-array ultrasonic inspection and verification | |
| CN111751448B (en) | Surface leakage wave ultrasonic synthetic aperture focusing imaging method | |
| CN103822971A (en) | Resolution detecting and calibrating method for ultrasonic microscope | |
| KR100591686B1 (en) | Ultrasonic inspection method for weld zone | |
| CN207396414U (en) | Boiler 12Cr1MoV steel plates inner wall corrosion cheats ultrasound detection Special test block | |
| KR200406096Y1 (en) | The Calibration Standard for Phased Array Ultrasonic Testing | |
| KR101163551B1 (en) | Sensistivity calibration referece block for phased-array ultrasonic inspection | |
| CN203117167U (en) | Ultrasonic detector for road steel bridge | |
| CN203069556U (en) | Ultrasonic detection device for highway steel bridge | |
| CN207248826U (en) | Boiler 12Cr1MoV low-temperature reheater inside pipe wall etch pit ultrasound detection Special test blocks | |
| CA2012374C (en) | Ultrasonic crack sizing method | |
| Marció et al. | Nondestructive inspection of metal specimen using tone-burst vibro-acoustography | |
| Lavender | Ultrasonic testing of steel castings | |
| Razygraev et al. | Investigation of the technique of ultrasonic thickness control using the EMA method | |
| Kemnitz et al. | Measurements of the acoustic field on austenitic welds: a way to higher reliability in ultrasonic tests | |
| CN103207240B (en) | The measuring method of the longitudinal acoustic pressure distribution of a kind of angle probe ultrasonic field | |
| CN111896623A (en) | Method for positioning defects of cast forging through ultrasonic detection | |
| JP4761147B2 (en) | Ultrasonic flaw detection method and apparatus | |
| Dobmann et al. | Development and qualification of the Eddy-Current testing techniques “EC” and “EC+” in combination with Leeb-Hardness-Measurements for detection and verification of hardness spots on heavy steel plates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |