CN105628276B - A kind of ultra-supercritical boiler heat resisting pipe residual stress test method - Google Patents
A kind of ultra-supercritical boiler heat resisting pipe residual stress test method Download PDFInfo
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- CN105628276B CN105628276B CN201510991244.5A CN201510991244A CN105628276B CN 105628276 B CN105628276 B CN 105628276B CN 201510991244 A CN201510991244 A CN 201510991244A CN 105628276 B CN105628276 B CN 105628276B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/25—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons
- G01L1/255—Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, microwaves, neutrons using acoustic waves, or acoustic emission
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The present invention relates to a kind of ultra-supercritical boiler heat resisting pipe residual stress test methods, include the following steps：It is popped one's head in using the polarized wave of transmitting, a coupling device is set, and coupling device can be coupled with outer surface of steel tube, and can be fixedly secured probe；It will be introduced into the surface of steel pipe with the ultrasonic incidence wave that frequency is F, adjust the excitation angle of ultrasonic incidence wave, using the amplitude of detectors measure incidence and outgoing wave, and according to the time of incidence, is emitted time and frequency/wavelength, calculates and determine residual stress；The heat resisting pipe is austenite heat-resistance steel pipe；The supersonic frequency F is 51-54MHz.Nondestructively, and it can be suitable for being measured the steel pipe with curvature by the above method.
Description
Technical field
The present invention relates to a kind of methods of residual stress more particularly to a kind of ultra-supercritical boiler to be answered with heat resisting pipe remnants
Force test method.
Background technique
Super critical boiler refers to that outlet vapor pressure is greater than the critical pressure 22.1MPa of water, operation temperature is higher than facing for water
The boiler that 374 DEG C of boundary's temperature.Ultra-supercritical boiler is to use on the basis of super critical boiler in order to promote operating thermal efficiency
The New-type boiler of higher pressure and temperature.Definition for ultra-supercritical boiler, in our times power industry not yet
Unified delimitation, it is considered that it is ultra-supercritical boiler that steam pressure, which is higher than boiler of the 26MPa vapor (steam) temperature higher than 590 DEG C,.It is difficult to understand
Family name's body heat resisting pipe is received significant attention with its high temperature corrosion and heat resistant and oxidation resistance in steam.
All various stress can be generated in boiler heat resisting steel pipe in manufacture, installation and operation, the wherein influence of residual stress
It is very big, it is be easy to cause the rupture etc. of water-cooling wall, therefore it is necessary for carrying out test to the residual stress of boiler heat resisting steel pipe.
Austenite heat-resistance steel pipe has enough corrosion resistancies, is usually used in ultra-supercritical boiler, and austenite heat-resistance steel pipe
The range of Cr in 24-26%, the range of Ni in 17-23%,
The measurement method of residual stress is broadly divided into following two from measuring principle:Mechanical Method and physical method.Mechanical Method
Measuring principle be to be calculated by carrying out the cutting processing such as separation to measurand using the front and back variable quantity that strain relief generates
Residual stress out.According to measurand failure mode and degree can be divided into, subdivision method, layer stripping, ring core method, Blind Hole Method
Deng.Physical measure.The principle of physical measure be using all kinds of rays, ultrasonic wave etc. as testing tool, by its
The measuring and calculating of different reflection echos on the object of different residual stress, to carry out residual stress detection.Common physical detection
There are many method, mainly include x-ray method, magnetic survey method, supercritical ultrasonics technology etc..And physical method detection is because of its non-destructive, it is wide
General concern.Conventionally employed ultrasonic wave carries out the method that ultrasonic wave is tested to planes such as plates, is not suitable for surveying steel pipe
It is fixed, more it is measured not for austenite heat-resistance steel pipe.
And residual stress test is carried out with heat resisting pipe to ultra-supercritical boiler there has been no use ultrasonic wave in the prior art,
Particular without the carry out residual stress test for being directed to austenite heat-resistance steel pipe.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of using ultrasonic wave to ultra-supercritical boiler heat resisting pipe
The method for carrying out residual stress test, especially a kind of carry out residual stress survey that austenite heat-resistance steel pipe is directed to using ultrasonic wave
The method of examination.
The technical solution that the present invention solves above-mentioned technical problem is as follows：It is a kind of using ultrasonic wave to ultra-supercritical boiler with resistance to
The method that hot steel pipe carries out residual stress test.
Specific method is：It is popped one's head in using the polarized wave of transmitting, a coupling device is set, and coupling device can face with super
Boundary's boiler is coupled with heat resisting pipe outer surface, and can be fixedly secured probe；It will be introduced into the ultrasonic incidence wave that frequency is F
The surface of ultra-supercritical boiler heat resisting pipe adjusts the excitation angle of ultrasonic incidence wave, using detectors measure incidence and goes out
The amplitude of ejected wave, and calculated according to time of incidence, outgoing time and frequency/wavelength and determine residual stress.
The beneficial effects of the invention are as follows：Nondestructively, and it can be suitable for being measured the steel pipe with curvature.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the ultra-supercritical boiler is austenite heat-resistance steel pipe with heat resisting pipe.
Further, the supersonic frequency F is 51-54MHz, it is preferable that the supersonic frequency F is 52-52.5MHz.
Beneficial effect using above-mentioned further scheme is：It can be more suitable austenite heat-resistance steel pipe.
Further, the excitation angle for adjusting ultrasonic incidence wave makes the excitation angle and theory of ultrasonic incidence wave adjusted
The absolute value of the difference of incident angle is less than 5 degree.
Beneficial effect using above-mentioned further scheme is：Can more nondestructively, and it be suitable for the steel with curvature
Pipe is measured.
Specific embodiment
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit
Determine the scope of the present invention.
Embodiment one：
A method of residual stress test is carried out with heat resisting pipe to ultra-supercritical boiler using ultrasonic wave.Specific method
For：It is popped one's head in using the polarized wave of transmitting, a coupling device is set, and coupling device can be coupled with outer surface of steel tube, and can
It is fixedly secured probe；It will be introduced into the surface of steel pipe with the ultrasonic incidence wave that frequency is F, adjusts the excitation angle of ultrasonic incidence wave
Degree is emitted time and frequency/wavelength, pushes away using the amplitude of detectors measure incidence and outgoing wave, and according to the time of incidence
It calculates and determines residual stress.
The beneficial effects of the invention are as follows：Nondestructively, and it can be suitable for being measured the steel pipe with curvature.
Embodiment two：
When applicant detects residual stress using the method for embodiment one for common steel tube, ultrasonic conventional frequency is selected
15-35MHz, the residual stress of measurement and the residual stress of Blind Hole Technique for Measuring are almost the same, and error range is not necessarily in reasonable interval
Amendment.
Embodiment three：
When applicant detects residual stress using the method for embodiment one for austenite heat-resistance steel pipe, also selection is ultrasonic
Conventional frequency 15-35MHz, the residual stress of measurement and the residual stress of Blind Hole Technique for Measuring have relatively large deviation, need by result into
Row fitting, but what is be fitted is nonlinear fitting as the result is shown, so that this method is detected in the residual stress of austenite heat-resistance steel pipe
Applicability weaken significantly.
Example IV：
Applicant in test, chances on, when selecting frequency F range for 52MHz or so, using in embodiment one
The residual stress of the method and Blind Hole Technique for Measuring that measure residual stress is almost the same, is not needing further fitting.Although adopting
Easily decayed with high-frequency 51-54MHz, the high requirements on the equipment.But this method can obtain partial data, and can extrapolate residual
The size of residue stress.
Therefore, the frequency F range is 51-54MHz, preferably 52-52.5MHz.Using having for above-mentioned further scheme
Beneficial effect is can be more suitable austenite heat-resistance steel pipe.It traces it to its cause, it may be possible to because of the model of the Cr of austenite heat-resistance steel pipe
Be trapped among 24-26%, for the range of Ni in 17-23%, the content of Cr and N i is higher, or other addition metallic element or
The influence of carbon eventually leads to the difference of the crystal structure inside steel duct crystal structure and common steel tube.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of ultra-supercritical boiler heat resisting pipe residual stress test method, which is characterized in that include the following steps：It uses
The polarized wave of transmitting is popped one's head in, and a coupling device is arranged, and the coupling device can be with ultra-supercritical boiler heat resisting pipe appearance
Face coupling, and probe can be fixedly secured；Ultra-supercritical boiler heat resisting steel will be introduced into the ultrasonic incidence wave that frequency is F
The surface of pipe adjusts the excitation angle of ultrasonic incidence wave, using the amplitude of detectors measure incidence and outgoing wave, and according to incidence
Time is emitted time and frequency/wavelength, calculates and determines residual stress, the ultra-supercritical boiler is Ovshinsky with heat resisting pipe
Body heat resisting pipe, ultrasound incidence wave frequency rate F are 51-54MHz；The excitation angle for adjusting ultrasonic incidence wave, makes ultrasound adjusted
The excitation angle of incidence wave and the absolute value of the difference of theoretical incident angle are less than 5 degree.
2. a kind of ultra-supercritical boiler heat resisting pipe residual stress test method according to claim 1, which is characterized in that
The ultrasound incidence wave frequency rate F is 52-52.5MHz.
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| CN201510991244.5A CN105628276B (en) | 2015-12-24 | 2015-12-24 | A kind of ultra-supercritical boiler heat resisting pipe residual stress test method |
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| CN105628276B true CN105628276B (en) | 2018-11-20 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1261434A (en) * | 1997-05-15 | 2000-07-26 | 荷高文斯铝轧制品有限公司 | Meassurement of residual stress |
| CN104048786A (en) * | 2014-06-09 | 2014-09-17 | 中国航空工业集团公司北京航空材料研究院 | Method for nondestructive measurement of residual stress field in metal plate through ultrasonic waves |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20120073410A (en) * | 2010-12-27 | 2012-07-05 | 주식회사 포스코 | Residual stress measuring apparatus |
| CN102636303B (en) * | 2012-04-12 | 2013-12-18 | 中国人民解放军装甲兵工程学院 | Method for measuring residual stress of thin plating layer based on surface ultrasonic waves |
| CN103018326A (en) * | 2012-11-29 | 2013-04-03 | 北京理工大学 | Contact type ultrasonic non-destructive testing straight-line automatic scanning device |
| CN104142195B (en) * | 2014-04-30 | 2016-11-09 | 李祚华 | Steel structure member based on supercritical ultrasonics technology internal primary stress detection apparatus and method |
| CN104048785B (en) * | 2014-06-09 | 2016-02-24 | 中国航空工业集团公司北京航空材料研究院 | A kind of method of ultrasonic nonodestruction evaluation aluminum alloy forge piece internal residual stress level |
| CN104316237A (en) * | 2014-11-12 | 2015-01-28 | 武汉钢铁(集团)公司 | Steel plate surface residual stress detection device and method based on online ultrasonic wave |
-
2015
- 2015-12-24 CN CN201510991244.5A patent/CN105628276B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261434A (en) * | 1997-05-15 | 2000-07-26 | 荷高文斯铝轧制品有限公司 | Meassurement of residual stress |
| CN104048786A (en) * | 2014-06-09 | 2014-09-17 | 中国航空工业集团公司北京航空材料研究院 | Method for nondestructive measurement of residual stress field in metal plate through ultrasonic waves |
Non-Patent Citations (2)
| Title |
|---|
| Chung-Seok Kim+.Creep Characterization in Advanced Heat-Resistant Steel Using Ultrasonic Nonlinearity Technique.《Materials Transactions》.2012,第53卷(第11期), * |
| 孙望军等.9%~12%Cr新型马氏体耐热钢焊接构件的无损检测.《无损检测》.2010,第32卷(第2期), * |
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