CN113008716A - Thin-walled tube stress corrosion crack initiation high-flux experimental device and experimental method - Google Patents
Thin-walled tube stress corrosion crack initiation high-flux experimental device and experimental method Download PDFInfo
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- CN113008716A CN113008716A CN202110192431.2A CN202110192431A CN113008716A CN 113008716 A CN113008716 A CN 113008716A CN 202110192431 A CN202110192431 A CN 202110192431A CN 113008716 A CN113008716 A CN 113008716A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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Abstract
The invention provides a thin-walled tube stress corrosion crack initiation high-flux experimental device and an experimental method, which comprise an experimental container for installing a thin-walled tube sample, a heating system, a hydrochemical control system, a loading system and a detection system, wherein the thin-walled tube sample penetrates through the experimental container, and two ends of the thin-walled tube sample extend out of the experimental container; the heating system is used for controlling the temperature of the environment in the experiment container, the water chemistry control system and the environment in the experiment container form a loop, the water chemistry control system is used for controlling the pressure of the environment in the experiment container, the loading system is used for applying load to the thin-walled pipe sample, and the detection system is used for recording and monitoring relevant parameters of experiment water chemistry. The device is characterized in that the actual working environment of the thin-walled tube is simulated, continuous load is applied to the thin-walled tube sample through the loading system, and the voltage at two ends of the thin-walled tube sample is detected through the direct current voltage drop method detection assembly, so that the time for crack initiation is determined, and the thin-walled tube crack initiation test device is realized.
Description
Technical Field
The invention relates to the technical field of design and manufacture of material testing machines, in particular to a thin-walled tube stress corrosion crack initiation high-throughput experimental device and an experimental method.
Background
The stress corrosion cracking failure of the material in a service environment is a process which evolves along with time and mainly comprises two stages of crack initiation and crack propagation. Under the combined action of stress and a corrosion medium, fine micro-cracks gradually grow on the surface of the material of the equipment part at the defect position; subsequently, the microcracks continue to coalesce and propagate into the material, eventually leading to failure of the device by fracture.
The loads of the structural material, particularly the pressure boundary material, in the service environment are mainly caused by the operation pressure, the welding/machining residual stress/strain and the like, and the loads are closer to constant loads. Therefore, it is necessary to study the initiation behavior of stress corrosion cracking by loading with a static load closer to the service condition of the equipment.
The traditional Chinese patent with publication number CN210166281U discloses a high-temperature high-pressure water triaxial multi-sample loading stress corrosion crack initiation testing device, which solves the problems that the traditional single-axis single-sample testing efficiency of stress corrosion crack initiation in high-temperature high-pressure water is low, the insulation of a sample, the leading-out of a signal wire, the balance of loads among three loading shafts and the like. The device is provided with: high-pressure kettle lid, the high-pressure kettle body, annular heating device, thermocouple, stand, hydraulic pump, step motor, loading axle I, loading axle II, flange, displacement sensor, load cell, manometer, pressure sensor, reference electrode seat, auxiliary electrode seat, working electrode seat, sample fixed plate support and switch board etc. can realize that a plurality of samples in high temperature high pressure water carry out stress corrosion crack initiation test simultaneously.
The inventor considers that the test device in the prior art is difficult to test the thin-wall pipe, and has a point to be improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a thin-walled tube stress corrosion crack initiation high-throughput experimental device and an experimental method.
The thin-walled tube stress corrosion crack initiation high-flux experimental device comprises an experimental container for mounting a thin-walled tube sample, a heating system, a hydrochemical control system, a loading system and a detection system, wherein the experimental container is arranged in the thin-walled tube sample in a penetrating manner, and two ends of the thin-walled tube sample extend out of the experimental container; the heating system is used for controlling the temperature of the environment in the experiment container, the water chemistry control system and the environment in the experiment container form a loop, the water chemistry control system is used for controlling the pressure of the environment in the experiment container, the loading system is used for applying load to the thin-walled pipe sample, and the detection system is used for recording and monitoring relevant parameters of experiment water chemistry.
Preferably, the heating system comprises a heating sleeve and a heating seat, the heating sleeve is sleeved on the outer wall of the experimental container, and the heating seat is sleeved with the heating sleeve.
Preferably, water chemistry control system includes water storage column, magnetic drive pump, high pressure measuring pump and back pressure valve, the delivery port of water storage column communicates magnetic drive pump, high pressure measuring pump and experimental container's water inlet in proper order through the pipeline, the delivery port of experimental container passes through the pipeline and communicates with the water inlet of water storage column, the back pressure valve sets up on the pipeline of experimental container delivery port department.
Preferably, the loading system comprises a loading frame and a stretcher, the loading frame is coaxially and fixedly connected with the thin-walled tube sample, and a piston rod of the stretcher is coaxially and fixedly connected with the loading frame.
Preferably, the detection system comprises a direct current voltage drop method detection component and a measuring instrument; the direct current voltage drop method detection assembly is used for introducing current to two ends of the thin-walled tube sample and detecting and recording voltage changes of the two ends of the thin-walled tube sample; the measuring instrument is arranged on a loop formed by the water chemistry control system and the experimental container, and is used for detecting and recording the conductivity, the PH value and the dissolved oxygen of the liquid in the loop.
Preferably, a sealing assembly is arranged between the thin-walled tube sample and the experimental container, the sealing assembly comprises a sealing sleeve, a sealing cutting sleeve and a sealing ring, the sealing sleeve is fixedly connected with the outer wall of the experimental container, the sealing cutting sleeve is arranged at one end, far away from the experimental container, of the sealing sleeve, the sealing sleeve and the sealing cutting sleeve are both sleeved with the thin-walled tube sample, the sealing ring is arranged in the sealing cutting sleeve, and the sealing assembly is arranged at the upper side and the lower side of the experimental container in a group.
Preferably, the outer wall of the sealing sleeve is sleeved with a water cooling jacket.
Preferably, be provided with the auxiliary stay subassembly on the experiment container, the auxiliary stay subassembly includes experiment pipe clamp plate and lead screw, the lead screw is fixed to be provided with a plurality ofly at the upside of experiment container, experiment pipe clamp plate is provided with two, arbitrary at lead screw horizontal interval experiment pipe clamp plate all with the lead screw cooperation of sliding, just two experiment pipe clamp plates are worn to establish by thin wall pipe sample.
Preferably, branch pipes are coaxially welded and fixed at two ends of the thin-walled pipe sample, and the branch pipes are communicated with a protective gas cylinder through pipelines.
The invention provides a thin-walled tube stress corrosion crack initiation high-flux experimental method, which comprises the following steps: s1, welding threads at two ends of the thin-walled tube sample through an electron beam, respectively welding and fixing branch pipes at two ends of the thin-walled tube sample, and then installing the thin-walled tube sample on an experimental container, wherein two ends of the thin-walled tube sample extend out of the experimental container; s2, communicating a branch pipe at the upper end of the thin-walled pipe sample with a protective gas cylinder through a pipeline, and connecting the lower end of the thin-walled pipe sample with a piston rod of a stretcher through a loading frame; s3, opening the magnetic pump, the high-pressure metering pump and the backpressure valve, and cleaning a loop formed by the water chemistry control system and the experimental container; and S4, opening the magnetic pump, the high-pressure metering pump and the heating sleeve to enable the temperature and the pressure of the environment in the experimental container to reach the experimental standard, then starting the stretcher, and detecting and recording relevant parameters and experimental data of the experiment through the direct current voltage drop method detection assembly and the measuring instrument.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the temperature and the pressure of the environment in the experimental container are controlled by the hydrochemical control system and the heating system, so that the actual working environment of the thin-walled pipe is simulated, a continuous load is applied to the thin-walled pipe sample by the loading system, and then the voltage at two ends of the thin-walled pipe sample is detected by the direct current voltage drop method detection assembly, so that the time for crack initiation is determined, the thin-walled pipe crack initiation test device is realized, and the improvement of the precision of the crack initiation test on the thin-walled pipe is facilitated;
2. according to the invention, the branch pipes fixed at two ends of the thin-walled tube sample by welding are communicated with the protective gas cylinders, so that the thin-walled tube sample is filled with enough protective gas to maintain the internal pressure in the experimental process, and the progress of a crack initiation test is improved;
3. according to the invention, through adjusting corresponding equipment parameters, a material slow strain rate stretching experiment and an online crack propagation rate measurement experiment can be carried out, which is beneficial to improving the applicability of the experimental device.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of the overall structure of a circuit of an experimental facility embodying the present invention;
FIG. 2 is a schematic diagram of the main structure of the experimental device according to the present invention;
FIG. 3 is a schematic cross-sectional view of the main body structure of a uniaxial experimental apparatus embodying the invention;
fig. 4 is a schematic view of a variation 1 of the present invention mainly showing the main structure of the experimental apparatus.
Reference numerals: 1. a thin-walled tube sample; 11. a branch pipe; 12. a high-purity argon bottle; 2. an autoclave; 21. a support plate; 3. a heating system; 31. heating a jacket; 32. a heating base; 4. a water chemistry control system; 41. a water column; 42. a magnetic pump; 43. a high pressure metering pump; 44. a back pressure valve; 45. an ion bed; 5. loading the system; 51. loading a frame; 52. a stretcher; 6. a detection system; 61. a direct current voltage reduction method detection component; 62. a measuring instrument; 7. a seal assembly; 71. a sealing sleeve; 72. sealing the cutting sleeve; 73. a seal ring; 74. water cooling jacket; 8. an auxiliary support assembly; 81. experiment tube pressing plate; 82. and (4) a screw rod.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in FIG. 1, the thin-walled tube stress corrosion crack initiation high-throughput experimental device provided by the invention comprises an experimental container for mounting a thin-walled tube sample 1, a heating system 3, a water chemistry control system 4, a loading system 5 and a detection system 6. The length of the thin walled tube sample 1 is about 500 mm.
As shown in fig. 1, 2 and 3, the experimental container is an autoclave 2, the autoclave 2 is vertically arranged, a support plate 21 is arranged at the lower side of the autoclave 2, the autoclave 2 is fixedly connected with the support plate 21, and the support plate 21 plays a role of stably supporting the autoclave 2. Both ends of the thin-walled tube sample 1 are welded with threads through electron beams, the thin-walled tube sample 1 vertically penetrates through the autoclave 2 and is fixedly connected with the autoclave 2 through the threads, and both ends of the thin-walled tube sample 1 extend out of the autoclave 2. The two ends of the thin-wall pipe sample 1 extending out of the autoclave 2 are coaxially welded and fixed with branch pipes 11, the length of each branch pipe 11 is about eight inches, and the branch pipe 11 positioned on the upper side is communicated with a protective gas cylinder through a pipeline.
The protective gas bottle is a high-purity argon gas bottle 12, the high-purity argon gas bottle 12 fills pressure into the thin-walled tube sample 1 and maintains the internal pressure of the thin-walled tube sample 1, and the situation that the thin-walled tube sample 1 is deformed, leaked and collapsed in the stretching process is reduced.
The heating system 3 comprises a heating sleeve 31 and a heating seat 32, the heating sleeve 31 is sleeved on the outer wall of the high-pressure kettle 2, the high-pressure kettle 2 is heated through the heating sleeve 31, and the uniformity of the environment temperature in the high-pressure kettle 2 is improved. The heating seat 32 is sleeved on the outer side wall of the heating sleeve 31, and the heating seat 32 is fixedly connected with the support plate 21 through a bolt, so that the uniformity of the ambient temperature in the autoclave 2 is further ensured.
As shown in fig. 3, a sealing assembly 7 is installed between the thin-walled tube sample 1 and the autoclave 2, the sealing assembly 7 is installed in a group on the upper side and the lower side of the autoclave 2, any group of sealing assembly 7 comprises a sealing sleeve 71, a sealing cutting sleeve 72 and a sealing ring 73, and the sealing sleeve 71 is a polytetrafluoroethylene anti-collapse end plug. One of the sealing sleeves 71 is fixedly installed on the upper side wall of the autoclave 2, the other sealing sleeve 71 is fixedly installed on the lower side wall of the autoclave 2, and the two sealing sleeves 71 are sleeved with the thin-walled tube sample 1. The two sealing cutting sleeves 72 are respectively installed on one side, far away from the autoclave 2, of the two sealing sleeves 71, the two sealing cutting sleeves 72 are coaxially arranged in the thin-walled tube sample 1 in a penetrating mode, the two sealing rings 73 are embedded in the corresponding sealing cutting sleeves 72 and play a sealing role in the thin-walled tube sample 1, and the situation that liquid in the autoclave 2 flows out from the connecting position between the thin-walled tube sample 1 and the autoclave 2 is reduced.
All the water cooling jackets 74 are sleeved on the outer walls of the two further sealing sleeves 71, and the water cooling jackets 74 are used for continuously cooling the sealing sleeves 71, so that the sealing assembly 7 is prevented from being failed due to overheating.
The upper side of autoclave 2 still installs supplementary supporting component 8, and supplementary supporting component 8 includes experiment pipe clamp plate 81 and lead screw 82, and the lower extreme of lead screw 82 vertically penetrates in the outer wall of autoclave 2 and rather than screw-thread fit, and four are installed on autoclave 2 to lead screw 82. Two experiment pipe pressing plates 81 are horizontally arranged at intervals on the upper side of the high-pressure kettle 2, and any screw rod 82 penetrates through the two experiment pipe pressing plates 81 and is in sliding fit with the two experiment pipe pressing plates. Equal screw-thread fit has the nut on arbitrary lead screw 82, and two experiment pipe clamp plates 81 all realize the location installation on lead screw 82 through a plurality of nut cooperations. The thin-walled tube sample 1 vertically penetrates through the two experimental tube pressing plates 81, and the two experimental tube pressing plates 81 play a limiting and supporting role on the thin-walled tube sample 1, so that the stability of the thin-walled tube sample 1 mounted on the autoclave 2 is improved, and the accuracy of an experiment is further improved.
As shown in fig. 3, the loading system 5 includes a loading frame 51 and a drawing machine 52, the loading frame 51 is coaxially and fixedly connected with the lower end of the thin-walled tube sample 1 through the matching of a key and a groove, the loading frame 51 is coaxially and fixedly connected with a telescopic rod of the drawing machine 52 through the matching of a thread, and the drawing machine 52 draws the thin-walled tube sample 1 and applies a stable load to the thin-walled tube sample 1.
As shown in fig. 1, the water chemistry control system 4 comprises a water storage column 41, a magnetic pump 42, a high-pressure metering pump 43 and a backpressure valve 44, wherein a water outlet of the water storage column 41 is sequentially communicated with the magnetic pump 42, the high-pressure metering pump 43 and a water inlet of the autoclave 2 through pipelines, and a water outlet of the autoclave 2 is communicated with the water inlet of the water storage column 41 through a pipeline to form a loop. A back pressure valve 44 is installed on the pipe at the water outlet of the autoclave 2. Further, an ion bed 45 is installed at a water inlet of the water storage column 41, and the ion bed 45 can absorb corrosion products released by the loop in time to purify water in the loop.
The detection system 6 comprises a direct current voltage drop method detection assembly 61 and a measuring instrument 62, current is introduced into two ends of the thin-walled tube sample 1 through the direct current voltage drop method detection assembly 61, voltage changes at two ends of the thin-walled tube sample 1 are detected and recorded through the direct current voltage drop method detection assembly 61, and when cracks are initiated in a gauge length section, voltage signals at two sides of the gauge length section can rise, so that crack initiation time is determined. The instrumentation 62 is installed in the loop formed by the water chemistry control system 4 and the test vessel and detects and records the conductivity, PH, and dissolved oxygen of the liquid in the loop.
The invention provides a thin-walled tube stress corrosion crack initiation high-flux experimental method, which comprises the following steps:
s1, welding threads at two ends of a thin-walled tube sample 1 through an electron beam, respectively welding and fixing branch pipes 11 at two ends of the thin-walled tube sample 1, then installing the thin-walled tube sample 1 on an autoclave 2, and enabling two ends of the thin-walled tube sample 1 to extend out of the autoclave 2;
s2, communicating a branch pipe 11 at the upper end of the thin-walled tube sample 1 with a high-purity argon bottle 12 through a pipeline, and connecting the lower end of the thin-walled tube sample 1 with a piston rod of a stretcher 52 through a loading frame 51;
s3, opening the magnetic pump 42, the high-pressure metering pump 43 and the backpressure valve 44, and cleaning a loop formed by the water chemistry control system 4 and the autoclave 2;
s4, turning on the magnetic pump 42, the high-pressure metering pump 43 and the heating jacket 31 to enable the temperature and the pressure of the environment in the autoclave 2 to reach the experimental standards, then starting the stretcher 52, and detecting and recording relevant parameters and experimental data of the experiment through the direct current voltage drop method detection assembly 61 and the measuring instrument 62.
Modification example 1
As shown in fig. 4, a plurality of thin-walled tube samples 1 can be simultaneously installed in the autoclave 2, and a multi-axis tensile test is performed, wherein the installation mode and the measurement mode of the specific samples are consistent with those of a single thin-walled tube sample 1, and each thin-walled tube sample 1 is independently loaded.
Principle of operation
During work, a worker fixedly installs the thin-walled tube sample 1 in the autoclave 2, then communicates the upper end of the thin-walled tube sample 1 with the high-purity argon gas bottle 12, fixedly connects the lower end of the thin-walled tube sample 1 with a piston rod of the stretcher 52 through the loading frame 51, then starts the magnetic pump 42, the high-pressure metering pump 43 and the heating sleeve 31 to enable the temperature and the pressure of the environment in the autoclave 2 to reach the experimental standards, then starts the stretcher 52, and detects and records relevant parameters and experimental data of the experiment through the direct current voltage drop method detection assembly 61 and the measuring instrument 62.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The thin-walled tube stress corrosion crack initiation high-flux experimental device is characterized by comprising an experimental container for mounting a thin-walled tube sample (1), a heating system (3), a hydrochemical control system (4), a loading system (5) and a detection system (6), wherein the experimental container is penetrated by the thin-walled tube sample (1), and two ends of the thin-walled tube sample (1) extend out of the experimental container;
the heating system (3) is used for controlling the temperature of the environment in the experiment container, the water chemistry control system (4) and the environment in the experiment container form a loop, the water chemistry control system (4) is used for controlling the pressure of the environment in the experiment container, the loading system (5) is used for applying load to the thin-walled tube sample (1), and the detection system (6) is used for recording and monitoring relevant parameters of experiment water chemistry.
2. The thin-walled tube stress corrosion crack initiation high-flux experimental device according to claim 1, wherein the heating system (3) comprises a heating sleeve (31) and a heating seat (32), the heating sleeve (31) is sleeved on the outer wall of the experimental container, and the heating seat (32) is sleeved on the heating sleeve (31).
3. The thin-walled pipe stress corrosion crack initiation high-flux experimental device according to claim 1, wherein the water chemistry control system (4) comprises a water storage column (41), a magnetic pump (42), a high-pressure metering pump (43) and a back pressure valve (44), a water outlet of the water storage column (41) is communicated with the magnetic pump (42), the high-pressure metering pump (43) and a water inlet of an experimental container in sequence through a pipeline, a water outlet of the experimental container is communicated with the water inlet of the water storage column (41) through a pipeline, and the back pressure valve (44) is arranged on the pipeline at the water outlet of the experimental container.
4. The thin-walled tube stress corrosion crack initiation high-flux experimental device according to claim 1, wherein the loading system (5) comprises a loading frame (51) and a stretcher (52), the loading frame (51) is coaxially and fixedly connected with the thin-walled tube specimen (1), and a piston rod of the stretcher (52) is coaxially and fixedly connected with the loading frame (51).
5. The thin-walled tube stress corrosion crack initiation high-throughput experimental device according to claim 1, wherein the detection system (6) comprises a direct current voltage drop method detection assembly (61) and a measuring instrument (62);
the direct current voltage drop method detection assembly (61) leads current to two ends of the thin-walled tube sample (1), and the direct current voltage drop method detection assembly (61) also detects and records voltage changes of two ends of the thin-walled tube sample (1);
the measuring instrument (62) is installed on a loop formed by the water chemistry control system (4) and the experiment container, and the measuring instrument (62) is used for detecting and recording the conductivity, the PH value and the dissolved oxygen of the liquid in the loop.
6. The thin-walled tube stress corrosion crack initiation high-flux experimental device according to claim 1, wherein a sealing assembly (7) is arranged between the thin-walled tube sample (1) and the experimental container, the sealing assembly (7) comprises a sealing sleeve (71), a sealing cutting sleeve (72) and a sealing ring (73), the sealing sleeve (71) is fixedly connected with the outer wall of the experimental container, the sealing cutting sleeve (72) is arranged at one end, far away from the experimental container, of the sealing sleeve (71), the thin-walled tube sample (1) is sleeved with both the sealing sleeve (71) and the sealing cutting sleeve (72), the sealing ring (73) is arranged in the sealing cutting sleeve (72), and the sealing assembly (7) is provided with a set on the upper side and the lower side of the experimental container.
7. The thin-walled tube stress corrosion crack initiation high-flux experimental device as claimed in claim 6, wherein the outer wall of the sealing sleeve (71) is sleeved with a water cooling jacket (74).
8. The thin-walled tube stress corrosion crack initiation high-flux experimental device according to claim 1, wherein an auxiliary support assembly (8) is arranged on the experimental container, the auxiliary support assembly (8) comprises an experimental tube pressing plate (81) and a screw rod (82), a plurality of screw rods (82) are fixedly arranged on the upper side of the experimental container, two experimental tube pressing plates (81) are horizontally arranged on the screw rod (82) at intervals, any one of the experimental tube pressing plates (81) is in sliding fit with the screw rod (82), and the thin-walled tube sample (1) penetrates through the two experimental tube pressing plates (81).
9. The thin-walled tube stress corrosion crack initiation high-flux experimental device according to claim 1, wherein both ends of the thin-walled tube specimen (1) are coaxially welded and fixed with branch tubes (11), and the branch tubes (11) are communicated with a protective gas cylinder through a pipeline.
10. A high flux experimental method for stress corrosion crack initiation of a thin-walled tube is characterized by comprising the following steps:
s1, welding threads at two ends of the thin-walled tube sample (1) through electron beams, respectively welding and fixing branch tubes (11) at two ends of the thin-walled tube sample (1), and then installing the thin-walled tube sample (1) on an experimental container to enable two ends of the thin-walled tube sample (1) to extend out of the experimental container;
s2, communicating a branch pipe (11) at the upper end of the thin-walled pipe sample (1) with a protective gas cylinder through a pipeline, and connecting the lower end of the thin-walled pipe sample (1) with a piston rod of a stretcher (52) through a loading frame (51);
s3, opening the magnetic pump (42), the high-pressure metering pump (43) and the backpressure valve (44), and cleaning a loop consisting of the water chemistry control system (4) and the experimental container;
and S4, turning on the magnetic pump (42), the high-pressure metering pump (43) and the heating sleeve (31) to enable the temperature and the pressure of the environment in the experimental container to reach experimental standards, then starting the stretcher (52), and detecting and recording relevant experimental parameters and experimental data through the direct current voltage drop method detection assembly (61) and the measuring instrument (62).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279946A (en) * | 2021-12-24 | 2022-04-05 | 苏州热工研究院有限公司 | Device and method for evaluating stress corrosion sensitivity of metal sample through electrochemical monitoring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201285358Y (en) * | 2008-11-12 | 2009-08-05 | 中国科学院金属研究所 | Apparatus for implementing loading under high temperature high pressure environment |
| CN110286050A (en) * | 2019-07-23 | 2019-09-27 | 西安热工研究院有限公司 | A kind of slow tensile stress etching pilot system of full pipe sample high-temperature high pressure water of metal tube |
| CN210465220U (en) * | 2019-01-30 | 2020-05-05 | 上海凯尔孚应力腐蚀试验设备有限公司 | Water chemistry measurement circulation loop and experimental kettle |
| CN112082931A (en) * | 2019-06-12 | 2020-12-15 | 中国科学院金属研究所 | High-temperature high-pressure water triaxial multi-sample loading stress corrosion crack initiation testing device |
-
2021
- 2021-02-20 CN CN202110192431.2A patent/CN113008716A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201285358Y (en) * | 2008-11-12 | 2009-08-05 | 中国科学院金属研究所 | Apparatus for implementing loading under high temperature high pressure environment |
| CN210465220U (en) * | 2019-01-30 | 2020-05-05 | 上海凯尔孚应力腐蚀试验设备有限公司 | Water chemistry measurement circulation loop and experimental kettle |
| CN112082931A (en) * | 2019-06-12 | 2020-12-15 | 中国科学院金属研究所 | High-temperature high-pressure water triaxial multi-sample loading stress corrosion crack initiation testing device |
| CN110286050A (en) * | 2019-07-23 | 2019-09-27 | 西安热工研究院有限公司 | A kind of slow tensile stress etching pilot system of full pipe sample high-temperature high pressure water of metal tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279946A (en) * | 2021-12-24 | 2022-04-05 | 苏州热工研究院有限公司 | Device and method for evaluating stress corrosion sensitivity of metal sample through electrochemical monitoring |
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