CN113176331B - Method for detecting hydrogen damage of material through ultrasonic circumferential guided wave sound velocity - Google Patents
Method for detecting hydrogen damage of material through ultrasonic circumferential guided wave sound velocity Download PDFInfo
- Publication number
- CN113176331B CN113176331B CN202110332123.5A CN202110332123A CN113176331B CN 113176331 B CN113176331 B CN 113176331B CN 202110332123 A CN202110332123 A CN 202110332123A CN 113176331 B CN113176331 B CN 113176331B
- Authority
- CN
- China
- Prior art keywords
- hydrogen
- circumferential
- guided wave
- ultrasonic
- sound velocity
- 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
Images
Classifications
-
- 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
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
-
- 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
- G01N29/24—Probes
-
- 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
-
- 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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
-
- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0423—Surface waves, e.g. Rayleigh waves, Love waves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a method for detecting material hydrogen damage through ultrasonic circumferential guided wave sound velocity, which comprises the steps of manufacturing a group of original reference blocks, carrying out a hydrogen permeation test on the original reference blocks, manufacturing a circumferential hydrogen damage annular comparison test block group, setting up an ultrasonic axial guided wave sound velocity detection system, testing the circumferential guided wave sound velocity of the circumferential hydrogen damage annular comparison test block group, measuring the average hydrogen concentration, drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve, and detecting the hydrogen damage degree of in-service equipment to be detected. The method finds out the corresponding relation between the circumferential guided wave sound velocity change and the material hydrogen damage degree, and draws a material circumferential guided wave sound velocity-material average hydrogen concentration reference curve, thereby evaluating the hydrogen damage condition of the chemical oil refining hydrogenation equipment and the hydrogen equipment which have smaller internal diameter in service and can not enter or stop. The invention has low cost in the detection process, does not need to stop the detected in-service hydrogenation equipment, and has very positive effect on monitoring the hydrogen damage of the in-service chemical oil refining hydrogenation equipment.
Description
Technical Field
The invention relates to the technical field of nondestructive inspection of metal materials, in particular to a method for detecting hydrogen damage of a metal material through ultrasonic guided waves, and particularly relates to a method for detecting hydrogen damage of the material through ultrasonic circumferential guided wave sound velocity.
Background
Hydrogen damage to metals includes hydrogen embrittlement, hydrogen blistering, and hydrogen induced cracking, among other things, where hydrogen embrittlement is recoverable and hydrogen blistering and hydrogen induced cracking are permanent, and thus it is of great importance to be able to assess the extent of hydrogen damage in the early stages of metal hydrogen damage. At present, a method for evaluating the hydrogen damage degree of a metal material generally adopts a material mechanical property detection method, and the method belongs to a destructive method, so that in-service equipment cannot be detected by adopting the method.
The existing in-service equipment detection material hydrogen damage nondestructive inspection method mainly focuses on the characterization of the hydrogen damage degree by ultrasonic longitudinal wave sound velocity VL and transverse wave sound velocity VS. Theoretical studies show that: microcracks in the material affect the bulk elastic modulus, thereby reducing the longitudinal wave velocity VL and the transverse wave velocity VS, the longitudinal wave velocity VL and the transverse wave velocity VS of the hydrogen damaged material being reduced by at least 10% and 7% respectively, the percentage of VL reduction being greater than the percentage of VS reduction, compared to the material without hydrogen damage. Therefore, hydrogen damage will increase the value of VS/VL, and VS, VL are measured separately, and the ratio is calculated to measure the degree of hydrogen damage to the material. The hydrogen damage detection by adopting the existing ultrasonic longitudinal wave and transverse wave has the advantages that the hydrogen damage of the material can be detected under the condition of non-damage to the material; the method has the disadvantages that if ultrasonic longitudinal wave and transverse wave body waves are adopted for representation, the wall thickness of the material needs to be known, and the condition of wall thickness reduction sometimes occurs in the use process of the material, so that the corresponding relation cannot be established; on the other hand, if the material is judged by the aspect ratio method, only serious hydrogen damage and no damage of the material can be judged, and the initial hydrogen damage of the material cannot be judged well.
The publication number is: 103245726B, a method for detecting hydrogen damage of a material by using an ultrasonic surface wave is introduced, which has a core technology that a corresponding relation between the ultrasonic wave speed of the material and the hydrogen damage of the material is established, and the hydrogen damage degree of the material can be obtained by measuring the ultrasonic wave speed of the material. The method has the advantages that the corresponding relation between the wave speed of the ultrasonic surface wave of the material and the average hydrogen concentration in a certain depth of the surface of the material is established, and the hydrogen damage degree of the material on the detected surface of the material can be detected and judged; the energy of the ultrasonic surface wave is rapidly weakened along with the increase of the propagation depth, and the depth of a detection material is generally 2 times of the ultrasonic wavelength; while the pressure vessel or pressure pipeline of the petrochemical system hydrogenation equipment or the hydrogenation equipment is in operation, the inner wall of the equipment is a hydrogen contact surface. Therefore, if the hydrogen damage degree of the inner wall of the material is detected by adopting the ultrasonic surface wave, the detection is carried out on the inner wall of the equipment, and the detection cannot be carried out on the equipment with small inner diameter and no access or shutdown.
Therefore, it is necessary to invent a method for detecting hydrogen damage of a material by ultrasonic guided wave, which can perform online nondestructive detection of hydrogen damage of the material on equipment with smaller inner diameter and incapable of entering or stopping.
Disclosure of Invention
Aiming at the defects of the existing method for detecting the hydrogen damage of the material by the ultrasonic surface wave, the invention provides a method for detecting the hydrogen damage of the material by the ultrasonic circumferential guided wave sound velocity. The method has the advantages of simple scheme and convenient operation, and can realize on-line nondestructive detection of material hydrogen damage on chemical oil refining hydrogenation and hydrogenation equipment with smaller inner diameter and incapable of entering or stopping.
The invention adopts the following technical scheme:
a method for detecting hydrogen damage of a material by ultrasonic circumferential guided wave sound velocity comprises the following steps:
step 1: making a group of original annular reference blocks;
the number of the original ring-shaped reference blocks is 6, and the 6 original ring-shaped reference blocks have the same size and are numbered from S0 to S5;
step 2: carrying out a hydrogen permeation test on the original annular reference block;
carrying out a high-temperature high-pressure hydrogen permeation test on the original annular reference block with the serial number of S5 until hydrogen bubbling or hydrogen induced cracking is just generated, and recording the duration as H;
and step 3: manufacturing a circumferential hydrogen damage annular comparison test block group;
performing a hydrogen permeation test on four original annular reference test blocks numbered from S1 to S4 under the same test environment, wherein the test time of the hydrogen permeation test of the original annular reference test block No. S1 is 0.2H, the test time of the hydrogen permeation test of the original annular reference test block No. S2 is 0.4H, the test time of the hydrogen permeation test of the original annular reference test block No. S3 is 0.6H, and the test time of the hydrogen permeation test of the original annular reference test block No. S4 is 0.8H;
defining 5 original annular comparison test blocks in total of S1-S5 which finish the hydrogen permeation test as a circumferential hydrogen damage annular comparison test block group, and renumbering the original annular comparison test blocks into circumferential hydrogen damage annular comparison test blocks of SHH 1-SHH 5 numbers; the S0 original annular reference block is an original annular reference block which is not subjected to the hydrogen permeation test;
and 4, step 4: setting up an ultrasonic circumferential guided wave sound velocity detection system;
the ultrasonic circumferential guided wave sound velocity detection system comprises a multi-channel ultrasonic guided wave detector and a circumferential guided wave probe, wherein the circumferential guided wave probe comprises a probe main body, an arc wedge block is arranged at the bottom of the probe main body, the inside of the probe main body and the arc wedge block are divided into a left side transmitting part and a right side receiving part through a sound insulation layer, a transmitting piezoelectric wafer is obliquely arranged in the left side transmitting part, a receiving piezoelectric wafer is obliquely arranged in the right side receiving part, damping blocks are arranged on the transmitting piezoelectric wafer and the receiving piezoelectric wafer, a transmitting signal interface and a receiving signal interface are arranged at the top of the probe main body, the transmitting piezoelectric wafer is electrically connected with the transmitting signal interface, the receiving piezoelectric wafer is electrically connected with the receiving signal interface, and the transmitting signal interface and the receiving signal interface are electrically connected with the multi-channel ultrasonic guided wave detector;
and 5: testing the circumferential guided wave sound velocity of the circumferential hydrogen damage annular comparison test block group;
sequentially measuring the sound velocity of the ultrasonic circumferential guided waves in circumferential hydrogen damage annular reference test blocks from SHH1 to SHH5 by using an ultrasonic circumferential guided wave sound velocity detection system, wherein the corresponding values are Cd1, cd2, cd3, cd4 and Cd5;
measuring the sound velocity of the ultrasonic circumferential guided wave in an S0 original annular reference test block which is not subjected to the hydrogen permeation test, wherein the corresponding value is Cd0;
step 6: measuring the average concentration content of hydrogen in circumferential hydrogen damage annular reference test blocks of SHH 1-SHH 5 by using a hydrogen determination instrument, and respectively and correspondingly obtaining the average hydrogen concentrations a, b, c, d and e in the test blocks;
and 7: drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve;
and 8: and detecting the hydrogen damage degree of the in-service equipment to be detected.
Preferably, in the step 1, the original annular comparison test block is made of a material of the in-service hydrogen equipment which is not put into use, and the material and the thickness of the original annular comparison test block are consistent with those of the in-service hydrogen equipment to be detected.
Preferably, in step 2, the hydrogen permeation test environment is selected according to the actual working parameters of the in-service equipment to be detected.
Preferably, in step 3, the circumferential hydrogen damage annular reference blocks SHH1 to SHH5 correspond to the hydrogen damage levels of 1 to 5-level in-service hydrogen equipment.
Preferably, the transmitting piezoelectric wafer and the receiving piezoelectric wafer are both arranged on an arc-shaped wedge.
Preferably, the probe body is made of a sound absorbing material.
Preferably, in step 5, the test process of the circumferential guided wave sound velocity of the circumferential hydrogen damage annular reference block is as follows:
placing circumference guided wave probe circumference on the surface of SHH1 circumference hydrogen damage annular contrast test block, start multichannel supersound guided wave detector, the supersound guided wave is sent by launching piezoelectric wafer, propagate with circumference guided wave mode in SHH1 circumference hydrogen damage annular contrast test block, through probe itself, get into and receive piezoelectric wafer and lead into multichannel supersound guided wave detector for the first time, the supersound guided wave before this is called probe starting wave, then the supersound guided wave continues to propagate in SHH1 circumference hydrogen damage annular contrast test block, until the second time gets into and receives piezoelectric wafer, the time that the supersound guided wave got into between receiving piezoelectric wafer twice is that the guided wave accomplishes a whole circle of propagation time T1 in SHH1 circumference hydrogen damage annular contrast test block promptly, multichannel supersound guided wave detector can measure propagation time T1, then there is the following relational expression:
Cd1＝πD1/T1；(1)
in the formula, cd1 is the sound velocity of ultrasonic circumferential guided waves in an SHH1 circumferential hydrogen damage annular comparison test block;
d1 is the outer diameter of an SHH1 circumferential hydrogen damage annular reference block;
by the same method, the ultrasonic circumferential guided wave sound velocity Cd2 in the SHH2 circumferential hydrogen damage annular comparison test block is measured, the ultrasonic circumferential guided wave sound velocity Cd3 in the SHH3 circumferential hydrogen damage annular comparison test block is measured, the ultrasonic circumferential guided wave sound velocity Cd4 in the SHH4 circumferential hydrogen damage annular comparison test block is measured, the ultrasonic circumferential guided wave sound velocity Cd5 in the SHH5 circumferential hydrogen damage annular comparison test block is measured, and the ultrasonic circumferential guided wave sound velocity Cd0 in the S0 original annular comparison test block is measured.
Preferably, the average hydrogen concentration in the S0 original ring-shaped reference block is 0.
Preferably, the step 7 of drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve specifically includes:
and (3) drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve by using the ultrasonic circumferential guided wave sound velocities Cd0, cd1, cd2, cd3, cd4 and Cd5 obtained in the step (5) and the average hydrogen concentrations a, b, c, d, e and 0 obtained in the step (6), wherein the longitudinal coordinate of the curve is the circumferential guided wave sound velocity, and the horizontal coordinate of the curve is the average hydrogen concentration content of the test block.
Preferably, the step 8 of detecting the hydrogen damage degree of the in-service equipment to be detected specifically includes:
the method comprises the following steps of placing a circumferential guided wave probe on a pressure container or a pressure pipeline of the in-service equipment to be detected in service in a circumferential manner, starting a multi-channel ultrasonic guided wave detector, wherein ultrasonic guided waves are emitted by a transmitting piezoelectric wafer, and are propagated in the pressure container or the pressure pipeline of the in-service equipment to be detected in service in a circumferential guided wave mode, the ultrasonic guided waves pass through the probe, enter a receiving piezoelectric wafer for the first time and are led into the multi-channel ultrasonic guided wave detector, the former ultrasonic guided waves are called probe initial waves, then the ultrasonic guided waves are continuously propagated in the pressure container or the pressure pipeline of the in-service equipment to be detected in service until the ultrasonic guided waves enter the receiving piezoelectric wafer for the second time, the time between the ultrasonic guided waves twice entering the receiving piezoelectric wafer is the time that the guided waves complete one full circle of propagation time tau in the pressure container or the pressure pipeline of the in-service equipment to be detected in service, and the multi-channel ultrasonic guided wave detector can measure the propagation time tau, and has the following relations:
Cds＝πDs/τ；
in the formula, cdS is the sound velocity of ultrasonic circumferential guided waves in a pressure container or a pressure pipeline of a hydrogen equipment to be detected in service;
ds is the outer diameter of a pressure vessel or a pressure pipeline of the equipment to be detected in service;
and (4) according to the circumferential guided wave sound velocity-average hydrogen concentration reference curve obtained in the step (7), obtaining the actual average hydrogen concentration of the pressure vessel or pressure pipeline of the in-service equipment to be detected.
The invention has the beneficial effects that:
by means of the developed special circumferential guided wave probe and the circumferential hydrogen damage annular comparison test block group, a circumferential guided wave sound velocity-average hydrogen concentration reference curve of the material is manufactured, and a corresponding relation between circumferential guided wave sound velocity change and the material hydrogen damage degree is established; and grading the hydrogen damage condition of the detected in-service hydrogen equipment by using the manufactured reference curve.
The invention develops a special circumferential guided wave probe, which adopts a transmitting-receiving piezoelectric wafer, wherein guided waves transmitted by the transmitting wafer are transmitted into the receiving piezoelectric wafer twice; and selecting an arc wedge block to be better coupled with the detected pipe of the hydrogen equipment.
The circumferential hydrogen damage annular comparison test block group developed by the invention can realize the adjustment of the damage level range by adjusting the hydrogen permeation time of the test block, and has the advantage of wide test range.
The method for detecting the material ultrasonic guided wave can measure the circumferential guided wave sound velocity of the material on the outer wall of the in-service hydrogen equipment, and realizes hydrogen damage evaluation on the full-thickness dimension of the in-service hydrogen equipment, including hydrogen damage degree information of the inner wall of the equipment. By finding out the corresponding relation between the change of the circumferential guided wave sound velocity and the hydrogen damage degree of the material, drawing a reference curve of the material circumferential guided wave sound velocity-material average hydrogen concentration, and further evaluating the hydrogen damage condition of the chemical oil refining hydrogenation equipment and the hydrogen equipment which have smaller inner diameter in service and can not enter or stop. The detection process is low in cost, auxiliary equipment or destructive evaluation of related materials is not needed, the detected in-service hydrogenation equipment does not need to be shut down, and the method has a very positive effect on monitoring hydrogen damage of the in-service chemical oil refining hydrogenation equipment.
The amplitude parameter obtained by the invention is intuitive, the curve is simple to manufacture, and the detection efficiency is high.
The circumferential hydrogen damage annular comparison test block group used by the invention has the same specification and material as those of in-service hydrogen equipment, can fully utilize excess materials, saves resources and has low cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
Figure 1 is a schematic view of a circumferential guided wave probe.
FIG. 2 is a schematic diagram of detecting hydrogen damage of a material through ultrasonic circumferential guided wave sound velocity.
FIG. 3 is a circumferential guided wave sound velocity-average hydrogen concentration reference graph.
1. A transmit signal interface; 2. a connecting wire; 3. emitting the piezoelectric wafer; 4. a damping block; 5. a receive signal interface; 6. receiving a piezoelectric wafer; 7. a sound insulating layer; 8. a probe body; 9. an arc wedge block; 10. a multi-channel ultrasonic guided wave detector; 11. a circumferential guided wave probe; 12. a cable wire; 13. pressure vessel or pressure pipeline of the in-service equipment to be detected.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "circumferential", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Ultrasonic guided waves are mechanical waves generated due to the existence of a medium boundary, and can be propagated in a medium with a boundary, such as a container, a pipeline, a flat plate, a rod and the like, and the propagation direction is parallel to the boundary surface of the medium. In the pipe medium, ultrasonic guided waves exist in various waveforms such as longitudinal waves, torsional waves, and bending waves. The ultrasonic guided wave can propagate vibration in the whole medium boundary and can reflect the acoustic characteristics of the equipment in the full thickness range. Therefore, the hydrogen damage of the hydrogen-contacting material can influence the overall elastic modulus of the material, thereby influencing the circumferential guided wave sound velocity of the material.
The invention is based on an ultrasonic guided wave technology, and utilizes a special guided wave hydrogen damage detection device to manufacture a special hydrogen damage detection grading evaluation comparison test block group, measures the circumferential guided wave sound velocity of a material on the outer wall of equipment, finds out the corresponding relation between the circumferential guided wave sound velocity change and the material hydrogen damage degree, draws a material circumferential guided wave sound velocity-material average hydrogen concentration reference curve, and further evaluates the hydrogen damage conditions of chemical refining hydrogenation and hydrogen-contacting equipment which have smaller internal diameter in service and can not enter or stop.
With reference to fig. 1 to 3, a method for detecting hydrogen damage of a material by ultrasonic circumferential guided wave sound velocity is characterized by comprising the following steps:
step 1: making a group of original annular reference blocks;
the number of the original annular reference blocks is 6, and the 6 original annular reference blocks have the same size and are numbered from S0 to S5.
The original annular contrast test block is made of a material of the equipment which is not put into use, and the material and the thickness of the original annular contrast test block are consistent with those of the equipment to be detected in service.
Step 2: carrying out a hydrogen permeation test on the original annular reference block;
and (3) carrying out a high-temperature high-pressure hydrogen permeation test on the original annular reference block with the serial number of S5 until hydrogen bubbling or hydrogen induced cracking is just generated, and recording the duration as H.
And selecting the hydrogen permeation test environment according to the actual working parameters of the equipment to be detected in service.
And step 3: manufacturing a circumferential hydrogen damage annular comparison test block group;
performing a hydrogen permeation test on four original annular reference test blocks numbered from S1 to S4 under the same test environment, wherein the test time of the hydrogen permeation test of the original annular reference test block No. S1 is 0.2H, the test time of the hydrogen permeation test of the original annular reference test block No. S2 is 0.4H, the test time of the hydrogen permeation test of the original annular reference test block No. S3 is 0.6H, and the test time of the hydrogen permeation test of the original annular reference test block No. S4 is 0.8H;
and defining 5 original annular comparison test blocks in total for S1-S5 which finish the hydrogen permeation test as a circumferential hydrogen damage annular comparison test block group, and numbering the original annular comparison test blocks again as circumferential hydrogen damage annular comparison test blocks of SHH 1-SHH 5.
The original annular reference test block of the number S0 is an original annular reference test block which is not subjected to the hydrogen permeation test.
The circumferential hydrogen damage annular reference blocks of SHH 1-SHH 5 correspond to the hydrogen damage level of 1-5-level in-service hydrogen equipment.
And 4, step 4: setting up an ultrasonic circumferential guided wave sound velocity detection system;
the ultrasonic circumferential guided wave sound velocity detection system comprises a multi-channel ultrasonic guided wave detector 10 and a circumferential guided wave probe 11.
The circumferential guided wave probe comprises a probe body 8 which is made of sound absorbing material.
The bottom of probe main part is provided with arc voussoir 9, divide into left side transmission part and right side receiving part through sound insulating layer 7 in probe main part and the arc voussoir, and the slope is provided with transmission piezoelectric wafer 3 in the transmission part of left side, and the slope is provided with receiving piezoelectric wafer 6 in the receiving part of right side, and transmission piezoelectric wafer all sets up on the arc voussoir with receiving piezoelectric wafer.
And damping blocks 4 are arranged on the transmitting piezoelectric wafer and the receiving piezoelectric wafer.
The top of the probe body is provided with a transmitting signal interface 1 and a receiving signal interface 5.
The transmitting piezoelectric wafer is electrically connected with the transmitting signal interface through a connecting wire 2, and the receiving piezoelectric wafer is electrically connected with the receiving signal interface through a connecting wire.
The transmitting signal interface and the receiving signal interface are electrically connected with the multi-channel ultrasonic guided wave detector through a cable 12.
The transmitting piezoelectric wafer 3 and the receiving piezoelectric wafer 6 are arranged obliquely in order to enable better transmission and reception of the main acoustic beam.
The main sound beam emitted by the transmitting piezoelectric wafer can be focused at the middle of the receiving piezoelectric wafer after being reflected.
The ultrasonic circumferential guided wave sound velocity detection system selects a pitch-catch working mode, and sets parameters such as frequency dispersion characteristic analysis and frequency selection for the detection system.
And 5: testing the circumferential guided wave sound velocity of the circumferential hydrogen damage annular comparison test block group;
sequentially measuring the sound velocity of the ultrasonic circumferential guided waves in circumferential hydrogen damage annular reference test blocks from SHH1 to SHH5 by using an ultrasonic circumferential guided wave sound velocity detection system, wherein the corresponding values are Cd1, cd2, cd3, cd4 and Cd5;
and measuring the sound velocity of the ultrasonic circumferential guided waves in the S0 original annular reference test block which is not subjected to the hydrogen permeation test, wherein the corresponding value is Cd0.
The test process of the circumferential guided wave sound velocity of the circumferential hydrogen damage annular comparison test block is as follows:
the circumferential guided wave probe is circumferentially placed on the surface of the SHH No. 1 circumferential hydrogen damage annular comparison test block, and a coupling agent is smeared between the circumferential guided wave probe and the SHH No. 1 circumferential hydrogen damage annular comparison test block. Under the excitation of the multi-channel ultrasonic guided wave detector, the transmitting piezoelectric wafer transmits signals on the surface of the circumferential hydrogen damage annular comparison test block, the receiving piezoelectric wafer receives the signals and transmits the received signals back to the multi-channel ultrasonic guided wave detector, and the ultrasonic guided wave mode is displayed by the liquid crystal panel.
Start multichannel supersound guided wave detector, the supersound guided wave is sent by launching piezoelectric wafer, propagate with circumference guided wave mode in SHH1 circumference hydrogen damage annular comparison test block, through probe itself, first time gets into and receives piezoelectric wafer and leads to multichannel supersound guided wave detector, the supersound guided wave before this is called the probe and begins the ripples, then the supersound guided wave continues to propagate in SHH1 circumference hydrogen damage annular comparison test block, until the second time gets into and receives piezoelectric wafer, the time that the supersound guided wave got into between the receiving piezoelectric wafer is that the guided wave accomplishes a whole circle of propagation time T1 in SHH1 circumference hydrogen damage annular comparison test block promptly, multichannel supersound guided wave detector can measure propagation time T1, then there is following relation:
Cd1＝πD1/T1；(1)
in the formula, cd1 is the sound velocity of ultrasonic circumferential guided waves in an SHH1 number circumferential hydrogen damage annular comparison test block;
d1 is the outer diameter of an SHH1 circumferential hydrogen damage annular reference block;
by the same method, the ultrasonic circumferential guided wave sound velocity Cd2 in the SHH2 circumferential hydrogen damage annular comparison test block is measured, the ultrasonic circumferential guided wave sound velocity Cd3 in the SHH3 circumferential hydrogen damage annular comparison test block is measured, the ultrasonic circumferential guided wave sound velocity Cd4 in the SHH4 circumferential hydrogen damage annular comparison test block is measured, the ultrasonic circumferential guided wave sound velocity Cd5 in the SHH5 circumferential hydrogen damage annular comparison test block is measured, and the ultrasonic circumferential guided wave sound velocity Cd0 in the S0 original annular comparison test block is measured.
Step 6: measuring the average concentration content of hydrogen in circumferential hydrogen damage annular reference test blocks of SHH 1-SHH 5 by using a hydrogen determinator, and respectively and correspondingly obtaining the average hydrogen concentrations a, b, c, d and e in the test blocks;
the average hydrogen concentration in the original ring-shaped reference block of S0 number is 0.
And 7: drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve;
the method specifically comprises the following steps:
and (3) drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve by using the ultrasonic circumferential guided wave sound velocities Cd0, cd1, cd2, cd3, cd4 and Cd5 obtained in the step (5) and the average hydrogen concentrations a, b, c, d, e and 0 obtained in the step (6), wherein the longitudinal coordinate of the curve is the circumferential guided wave sound velocity, and the horizontal coordinate of the curve is the average hydrogen concentration content of the test block.
And 8: and detecting the hydrogen damage degree of the in-service equipment to be detected.
The method specifically comprises the following steps:
the method comprises the following steps of placing a circumferential guided wave probe on a pressure container or a pressure pipeline 13 of the in-service equipment to be detected in service in a circumferential manner, starting a multi-channel ultrasonic guided wave detector, wherein ultrasonic guided waves are emitted by a transmitting piezoelectric wafer, and are propagated in the pressure container or the pressure pipeline of the in-service equipment to be detected in service in a circumferential guided wave mode, the ultrasonic guided waves pass through the probe, enter a receiving piezoelectric wafer for the first time and are guided into the multi-channel ultrasonic guided wave detector, the former ultrasonic guided waves are called probe initial waves, then the ultrasonic guided waves are continuously propagated in the pressure container or the pressure pipeline of the in-service equipment to be detected in service until the ultrasonic guided waves enter the receiving piezoelectric wafer for the second time, the time between the ultrasonic guided waves twice entering the receiving piezoelectric wafer is the time that the guided waves complete a whole circle of propagation time tau in the pressure container or the pressure pipeline of the in-service equipment to be detected in service, and the multi-channel ultrasonic guided wave detector can measure the propagation time tau, and has the following relational expression:
Cds＝πDs/τ；
in the formula, cdS is the sound velocity of ultrasonic circumferential guided waves in a pressure vessel or a pressure pipeline of the equipment to be detected in service;
ds is the outer diameter of a pressure vessel or a pressure pipeline of the equipment to be detected in service;
the hydrogen damage level of the pressure vessel or the pressure pipeline of the in-service equipment to be detected can be obtained according to the CdS value, and the actual average hydrogen concentration of the pressure vessel or the pressure pipeline of the in-service equipment to be detected can be obtained according to the circumferential guided wave sound velocity-average hydrogen concentration reference curve obtained in the step 7.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. A method for detecting hydrogen damage of a material through ultrasonic circumferential guided wave sound velocity is characterized by comprising the following steps:
step 1: making a group of original annular reference blocks;
the number of the original ring-shaped reference blocks is 6, and the 6 original ring-shaped reference blocks have the same size and are numbered from S0 to S5;
step 2: carrying out a hydrogen permeation test on the original annular reference block;
carrying out a high-temperature high-pressure hydrogen permeation test on the original annular reference block with the serial number of S5 until hydrogen bubbling or hydrogen induced cracking is just generated, and recording the duration as H;
and step 3: manufacturing a circumferential hydrogen damage annular comparison test block group;
performing a hydrogen permeation test on four original annular reference test blocks numbered from S1 to S4 under the same test environment, wherein the test time of the hydrogen permeation test of the original annular reference test block No. S1 is 0.2H, the test time of the hydrogen permeation test of the original annular reference test block No. S2 is 0.4H, the test time of the hydrogen permeation test of the original annular reference test block No. S3 is 0.6H, and the test time of the hydrogen permeation test of the original annular reference test block No. S4 is 0.8H;
defining 5 original annular comparison test blocks in total of S1-S5 which finish the hydrogen permeation test as a circumferential hydrogen damage annular comparison test block group, and renumbering the original annular comparison test blocks into circumferential hydrogen damage annular comparison test blocks of SHH 1-SHH 5 numbers; the S0 original annular reference block is an original annular reference block which is not subjected to the hydrogen permeation test;
and 4, step 4: setting up an ultrasonic circumferential guided wave sound velocity detection system;
the ultrasonic circumferential guided wave sound velocity detection system comprises a multi-channel ultrasonic guided wave detector and a circumferential guided wave probe, wherein the circumferential guided wave probe comprises a probe main body, an arc wedge block is arranged at the bottom of the probe main body, the inside of the probe main body and the arc wedge block are divided into a left side transmitting part and a right side receiving part through a sound insulation layer, a transmitting piezoelectric wafer is obliquely arranged in the left side transmitting part, a receiving piezoelectric wafer is obliquely arranged in the right side receiving part, damping blocks are arranged on the transmitting piezoelectric wafer and the receiving piezoelectric wafer, a transmitting signal interface and a receiving signal interface are arranged at the top of the probe main body, the transmitting piezoelectric wafer is electrically connected with the transmitting signal interface, the receiving piezoelectric wafer is electrically connected with the receiving signal interface, and the transmitting signal interface and the receiving signal interface are electrically connected with the multi-channel ultrasonic guided wave detector;
and 5: testing the circumferential guided wave sound velocity of the circumferential hydrogen damage annular comparison test block group;
sequentially measuring the sound velocity of the ultrasonic circumferential guided waves in circumferential hydrogen damage annular reference test blocks from SHH1 to SHH5 by using an ultrasonic circumferential guided wave sound velocity detection system, wherein the corresponding values are Cd1, cd2, cd3, cd4 and Cd5;
measuring the sound velocity of the ultrasonic circumferential guided wave in an S0 original annular reference test block which is not subjected to the hydrogen permeation test, wherein the corresponding value is Cd0;
the test process of the circumferential guided wave sound velocity of the circumferential hydrogen damage annular comparison test block is as follows:
placing circumference guided wave probe circumference on the surface of SHH1 circumference hydrogen damage annular contrast test block, start multichannel supersound guided wave detector, the supersound guided wave is sent by launching piezoelectric wafer, propagate with circumference guided wave mode in SHH1 circumference hydrogen damage annular contrast test block, through probe itself, get into and receive piezoelectric wafer and lead into multichannel supersound guided wave detector for the first time, the supersound guided wave before this is called probe starting wave, then the supersound guided wave continues to propagate in SHH1 circumference hydrogen damage annular contrast test block, until the second time gets into and receives piezoelectric wafer, the time that the supersound guided wave got into between receiving piezoelectric wafer twice is that the guided wave accomplishes a whole circle of propagation time T1 in SHH1 circumference hydrogen damage annular contrast test block promptly, multichannel supersound guided wave detector can measure propagation time T1, then there is the following relational expression:
Cd1＝πD1/T1； (1)
in the formula, cd1 is the sound velocity of ultrasonic circumferential guided waves in an SHH1 circumferential hydrogen damage annular comparison test block;
d1 is the outer diameter of the SHH1 circumferential hydrogen damage annular reference block;
measuring an ultrasonic circumferential guided wave sound velocity Cd2 in an SHH2 circumferential hydrogen damage annular comparison test block, measuring an ultrasonic circumferential guided wave sound velocity Cd3 in an SHH3 circumferential hydrogen damage annular comparison test block, measuring an ultrasonic circumferential guided wave sound velocity Cd4 in an SHH4 circumferential hydrogen damage annular comparison test block, measuring an ultrasonic circumferential guided wave sound velocity Cd5 in an SHH5 circumferential hydrogen damage annular comparison test block, and measuring an ultrasonic circumferential guided wave sound velocity Cd0 in an S0 original annular comparison test block by the same method;
step 6: measuring the average concentration content of hydrogen in circumferential hydrogen damage annular reference test blocks of SHH 1-SHH 5 by using a hydrogen determination instrument, and respectively and correspondingly obtaining the average hydrogen concentrations a, b, c, d and e in the test blocks;
and 7: drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve;
and step 8: detecting the hydrogen damage degree of the in-service equipment to be detected;
the specific process comprises the following steps:
the method comprises the following steps of placing a circumferential guided wave probe on a pressure container or a pressure pipeline of the in-service equipment to be detected in service in a circumferential manner, starting a multi-channel ultrasonic guided wave detector, wherein ultrasonic guided waves are emitted by a transmitting piezoelectric wafer, and are propagated in the pressure container or the pressure pipeline of the in-service equipment to be detected in service in a circumferential guided wave mode, the ultrasonic guided waves pass through the probe, enter a receiving piezoelectric wafer for the first time and are led into the multi-channel ultrasonic guided wave detector, the former ultrasonic guided waves are called probe initial waves, then the ultrasonic guided waves are continuously propagated in the pressure container or the pressure pipeline of the in-service equipment to be detected in service until the ultrasonic guided waves enter the receiving piezoelectric wafer for the second time, the time between the ultrasonic guided waves twice entering the receiving piezoelectric wafer is the time that the guided waves complete one full circle of propagation time tau in the pressure container or the pressure pipeline of the in-service equipment to be detected in service, and the multi-channel ultrasonic guided wave detector can measure the propagation time tau, and has the following relations:
Cds＝πDs/τ；
in the formula, cdS is the sound velocity of ultrasonic circumferential guided waves in a pressure vessel or a pressure pipeline of the equipment to be detected in service;
ds is the outer diameter of a pressure vessel or a pressure pipeline of the equipment to be detected in service;
and (4) according to the circumferential guided wave sound velocity-average hydrogen concentration reference curve obtained in the step (7), obtaining the actual average hydrogen concentration of the pressure vessel or the pressure pipeline of the in-service hydrogen equipment to be detected.
2. The method for detecting hydrogen damage of a material by ultrasonic circumferential guided wave sound velocity (IVR) according to claim 1, wherein in step 1, the original annular comparison test block is made of a material of a non-used in-service hydrogen equipment, and the material and the thickness of the original annular comparison test block are consistent with those of in-service hydrogen equipment to be detected.
3. The method for detecting hydrogen damage of a material by ultrasonic circumferential guided wave sound velocity according to claim 1, wherein in the step 2, the hydrogen permeation test environment is selected according to actual working parameters of the in-service equipment to be detected.
4. The method for detecting hydrogen damage of a material by ultrasonic circumferential guided wave sound velocity according to claim 1, wherein in step 3, the circumferential hydrogen damage annular reference test blocks SHH1 to SHH5 correspond to the hydrogen damage level of 1-5 grade in-service hydrogen equipment.
5. The method for detecting the hydrogen damage of the material by the ultrasonic circumferential guided wave sound velocity is characterized in that the transmitting piezoelectric wafer and the receiving piezoelectric wafer are arranged on the arc-shaped wedge block.
6. The method for detecting hydrogen damage of a material by utilizing the ultrasonic circumferential guided wave sound velocity as claimed in claim 1, wherein the probe body is made of a sound absorption material.
7. The method for detecting the hydrogen damage of the material by the ultrasonic circumferential guided wave sound velocity is characterized in that the average hydrogen concentration in the S0 original annular reference test block is 0.
8. The method for detecting hydrogen damage of a material through ultrasonic circumferential guided wave sound velocity according to claim 7, wherein the step 7 of drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve specifically comprises:
and (3) drawing a circumferential guided wave sound velocity-average hydrogen concentration reference curve by using the ultrasonic circumferential guided wave sound velocities Cd0, cd1, cd2, cd3, cd4 and Cd5 obtained in the step (5) and the average hydrogen concentrations a, b, c, d, e and 0 obtained in the step (6), wherein the longitudinal coordinate of the curve is the circumferential guided wave sound velocity, and the horizontal coordinate of the curve is the average hydrogen concentration content of the test block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110332123.5A CN113176331B (en) | 2021-03-29 | 2021-03-29 | Method for detecting hydrogen damage of material through ultrasonic circumferential guided wave sound velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110332123.5A CN113176331B (en) | 2021-03-29 | 2021-03-29 | Method for detecting hydrogen damage of material through ultrasonic circumferential guided wave sound velocity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113176331A CN113176331A (en) | 2021-07-27 |
| CN113176331B true CN113176331B (en) | 2022-11-08 |
Family
ID=76922605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110332123.5A Active CN113176331B (en) | 2021-03-29 | 2021-03-29 | Method for detecting hydrogen damage of material through ultrasonic circumferential guided wave sound velocity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113176331B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4890496A (en) * | 1988-09-07 | 1990-01-02 | Electric Power Research Institute | Method and means for detection of hydrogen attack by ultrasonic wave velocity measurements |
| US5404754A (en) * | 1993-02-10 | 1995-04-11 | Shell Oil Company | Ultrasonic detection of high temperature hydrogen attack |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4685334A (en) * | 1986-01-27 | 1987-08-11 | The Babcock & Wilcox Company | Method for ultrasonic detection of hydrogen damage in boiler tubes |
| WO2002077634A2 (en) * | 2001-03-22 | 2002-10-03 | The Regents Of The University Of California | Guided acoustic wave inspection system |
| CN103245726B (en) * | 2013-04-02 | 2015-05-27 | 华东理工大学 | Method for detecting material hydrogen damage through ultrasonic surface waves |
| CN103293225B (en) * | 2013-05-28 | 2015-01-07 | 国家电网公司 | Ultrasonic detection and diagnosis method for hydrogen damages on water-cooling wall pipe of boiler |
| CN103926324B (en) * | 2014-04-08 | 2016-05-18 | 国家电网公司 | A kind of ultrasonic surface wave detects the method for live steam piping creep impairment |
| CN108845032B (en) * | 2018-05-28 | 2021-02-12 | 菏泽市产品检验检测研究院 | Ultrasonic detection method for hydrogen damage of boiler water wall pipe |
-
2021
- 2021-03-29 CN CN202110332123.5A patent/CN113176331B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4890496A (en) * | 1988-09-07 | 1990-01-02 | Electric Power Research Institute | Method and means for detection of hydrogen attack by ultrasonic wave velocity measurements |
| US5404754A (en) * | 1993-02-10 | 1995-04-11 | Shell Oil Company | Ultrasonic detection of high temperature hydrogen attack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113176331A (en) | 2021-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4658649A (en) | Ultrasonic method and device for detecting and measuring defects in metal media | |
| JP4910770B2 (en) | Tubular ultrasonic inspection apparatus and ultrasonic inspection method | |
| JP2700901B2 (en) | Electromagnetic ultrasonic conversion method | |
| JP5590249B2 (en) | Defect detection apparatus, defect detection method, program, and storage medium | |
| US5092176A (en) | Method for determining deposit buildup | |
| CN101398409B (en) | Automatic detection method for oblique incidence wave technology steel plate and device thereof | |
| EP2598866B1 (en) | Ultrasonic pipe inspection with signal processing arrangement | |
| CN201408181Y (en) | Ultrasonic probe of pressure pipeline elbow with dome-shaped wedge block | |
| US4366711A (en) | Method of testing fuel rods for assemblies for nuclear reactors and corresponding apparatus | |
| JPH0447798B2 (en) | ||
| CN113176331B (en) | Method for detecting hydrogen damage of material through ultrasonic circumferential guided wave sound velocity | |
| JP4241529B2 (en) | Ultrasonic inspection method and ultrasonic inspection apparatus | |
| CN113176332B (en) | Method for detecting hydrogen damage of material through ultrasonic axial guided wave sound velocity | |
| CN116183726A (en) | Ultrasonic detection capability evaluation method and system for stainless steel small-diameter pipe weld joint | |
| CN113189199B (en) | Nonlinear ultrasonic detection grading evaluation method for heat-resistant steel part performance degradation | |
| KR101826917B1 (en) | Multi-channel ultrasonic diagnostic method for long distance piping | |
| JP5121214B2 (en) | Tube group thinning inspection device and inspection method | |
| CN213068722U (en) | Ultrasonic device for detecting damage of grid structure | |
| CN113189205B (en) | Method for detecting creep damage of in-service main steam pipeline by ultrasonic guided wave | |
| EP4086620A1 (en) | Method and device for checking the wall of a pipeline for flaws | |
| Willems et al. | Recent improvements regarding ultrasonic crack inspection of pipelines | |
| Wu et al. | Detection and identification of dents in pipelines using guided waves | |
| JPH11211700A (en) | Ultrasonic flaw detecting method and ultrasonic flaw detecting device used for same | |
| CN113280766A (en) | Method for measuring pipeline strain based on ultrasonic waves | |
| Mudge | Practical enhancements achievable in long range ultrasonic testing by exploiting the properties of guided waves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |