CN215574174U - Test medium loading device for slow strain tensile test and slow strain tensile test equipment - Google Patents
Test medium loading device for slow strain tensile test and slow strain tensile test equipment Download PDFInfo
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- CN215574174U CN215574174U CN202121078912.2U CN202121078912U CN215574174U CN 215574174 U CN215574174 U CN 215574174U CN 202121078912 U CN202121078912 U CN 202121078912U CN 215574174 U CN215574174 U CN 215574174U
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Abstract
The utility model discloses a test medium loading device for a slow strain tensile test, which comprises a water bath and a medium groove arranged in the water bath, wherein the water bath comprises a bottom plate, a side plate and a sealing cover, a water inlet hole and a water outlet hole are formed in the side plate, an air inlet hole is formed in the bottom plate corresponding to the medium groove, and an air outlet hole is formed in the sealing cover corresponding to the medium groove. According to the test medium loading device for the slow strain tensile test, the medium groove is arranged in the water bath groove, the medium is separated from the water bath, and the air inlet hole and the air outlet hole are independently arranged, so that on one hand, oxygen in a solution can be removed through introducing inert gas, the experimental environment is kept in an oxygen-free state, and on the other hand, the pressure in the medium groove can be adjusted through gas, and the medium groove is kept in a low-pressure state; therefore, a stable experimental environment is accurately provided for the slow strain tensile test of the metal sample, and an equipment foundation is provided for researching the stress corrosion sensitivity evaluation of the metal material in different medium environments. The utility model also discloses a slow strain tensile test device.
Description
Technical Field
The utility model belongs to the technical field of metal material testing, and particularly relates to a test medium loading device suitable for slow strain tensile testing of a metal material.
Background
Slow Strain Rate Testing (SSRT) is a testing method that accelerates the onset and progression of SCC processes by applying a load to a test piece by a testing machine at a constant, relatively slow strain rate to strengthen the strain state. The method has higher sensitivity to stress corrosion cracking, can quantitatively judge the stress corrosion cracking sensitivity, and is mostly used for researching the influence of the sample on the stress corrosion process under the conditions of different temperatures, electrode potentials, solution pH values and the like. A plurality of high-temperature slow strain rate testing machines are provided with high-temperature high-pressure experimental kettles, and corresponding environment medium containers are not arranged on equipment for room-temperature or low-temperature and low-pressure slow strain rate tests, so that difficulty is brought to the evaluation of stress corrosion sensitivity of metal materials in room-temperature or low-temperature and low-pressure media.
Disclosure of Invention
In view of the above, in order to overcome the defects of the prior art and achieve the above object, the present invention provides a test medium loading device for a slow strain tensile test of a metal material, which is capable of performing the slow strain tensile test of the metal material in a medium at room temperature or low temperature and low pressure.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a test medium loading device for a slow strain tensile test comprises a water bath and a medium groove arranged in the water bath, wherein the water bath comprises a bottom plate, a side plate and a sealing cover, a water inlet hole and a water outlet hole are formed in the side plate, an air inlet hole is formed in the bottom plate corresponding to the medium groove, and an air outlet hole is formed in the sealing cover corresponding to the medium groove.
Through set up the medium groove in the water bath, separate medium and water bath to set up inlet port and venthole alone, can remove the oxygen in the solution through letting in inert gas on the one hand, make experimental environment keep anaerobic state, on the other hand can be through the pressure in the gaseous conditioning medium inslot, make the medium inslot keep low pressure state. The low pressure in this application is still a slight positive pressure and not a negative pressure condition.
According to some preferred implementation aspects of the utility model, the first sealing ring arranged on the sealing cover corresponding to the periphery of the side plate and the second sealing ring arranged on the sealing cover corresponding to the periphery of the medium groove, so as to ensure the sealing performance with the water bath and the medium groove.
According to some preferred aspects of the utility model, the second sealing ring is in threaded connection with the upper end of the media tank to seal the test environment.
According to some preferred implementation aspects of the utility model, sealing rings are arranged between the cover and the top of the side plate and the top of the medium groove, so that the sealing performance is further enhanced.
According to some preferred implementation aspects of the utility model, the side wall of the medium groove is a curved surface, so that the heating area is enlarged, and the heating efficiency is improved.
According to some preferred aspects of the utility model, upper and lower fixing pins are included for fixing the ends of the test specimen. Go up the fixed pin and all be provided with the fixed pinhole on the fixed pin down, be connected with the testing machine through the pinhole.
According to some preferred embodiments of the present invention, the bottom plate has a screw hole extending downward, and the lower fixing pin is coupled to the bottom plate through the screw hole.
According to some preferred embodiments of the present invention, the sample penetrates through the cover, the medium groove and the bottom plate, the cover and the bottom plate have a sample hole for the sample to penetrate through, a sealing plug is arranged in the sample hole, and the sample penetrates through the sealing plug. Namely, the test section of the sample is positioned in the medium groove, is in contact with the medium and is sealed by arranging a sealing plug to prevent the medium from leaking.
According to some preferred aspects of the utility model, there is included a thermocouple extending through the cap and into the media tank. The temperature in the water bath and the test temperature are controlled by connecting the thermocouple with the constant temperature circulating system.
The utility model also provides slow strain tensile test equipment comprising the test medium loading device.
Compared with the prior art, the utility model has the advantages that: according to the test medium loading device for the slow strain tensile test, the medium groove is arranged in the water bath groove, the medium is separated from the water bath, and the air inlet hole and the air outlet hole are independently arranged, so that on one hand, oxygen in a solution can be removed through introducing inert gas, the experimental environment is kept in an oxygen-free state, and on the other hand, the pressure in the medium groove can be adjusted through gas, and the medium groove is kept in a low-pressure state; therefore, a stable experimental environment is accurately provided for the slow strain tensile test of the metal sample, and an equipment foundation is provided for researching the stress corrosion sensitivity evaluation of the metal material in different medium environments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a test media loading unit for slow strain tensile testing in a preferred embodiment of the utility model;
FIG. 2 is a schematic view showing the connection of a test medium loading unit according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the shape of a specimen in a slow strain tensile test;
wherein: firstly, fixing pins are arranged; fixing pins are arranged; thirdly, a lower sealing plug is arranged; fourthly, an upper sealing plug is arranged; fifthly, testing the sample; sixthly, testing a medium groove; seventhly, a constant-temperature water bath tank; eighthly, water inlet holes are formed; ninthly, water outlet hole; an air intake hole at the R;
an air outlet;
sealing the cover;
a thermocouple;
a screw hole;
a seal ring;
a second seal ring;
a constant temperature circulation system;
a flow control valve.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. 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.
Referring to fig. 1 to 3, the slow strain tensile testing apparatus of the present embodiment includes a test medium loading device, a constant temperature circulation system 17, a testing machine, a control system, and the like. The test medium loading device for the slow strain tensile test comprises a water bath tank 7, a medium tank 6 arranged in the water bath tank 7, an upper fixing pin 2 and a lower fixing pin 1, wherein the upper fixing pin and the lower fixing pin are used for fixing the end part of a sample 5 in a threaded mode, the side wall of the medium tank 6 is arranged in a curved surface mode, the heating area is enlarged, and the heating efficiency is improved. The water bath 7 comprises a bottom plate, a side plate and a sealing cover 12, wherein a water inlet hole 8 and a water outlet hole 9 are formed in the side plate, an air inlet hole 10 is formed in the bottom plate corresponding to the medium groove 6, and an air outlet hole 11 is formed in the sealing cover 12 corresponding to the medium groove 6. The bottom of the medium tank 6 and the bottom plate can be sealed by welding.
The first sealing ring arranged on the sealing cover 12 corresponding to the periphery of the side plate and the second sealing ring 16 arranged corresponding to the periphery of the medium groove 6 further ensure the sealing performance with the water bath 7 and the medium groove 6. The second sealing ring 16 is in threaded connection with the upper end of the medium groove 6, and the test environment is sealed. Sealing rings 15 are arranged between the sealing cover 12 and the top of the side plate and the top of the medium groove 6, so that the sealing performance is further enhanced.
All be provided with the fixed pinhole on last fixed pin 2 and the lower fixed pin 1, be connected with the testing machine through the pinhole. The bottom plate is provided with a screw hole extending downwards, and the lower fixing pin 1 is connected to the bottom plate through the screw hole 14. The sample 5 penetrates through the sealing cover 12, the medium groove 6 and the bottom plate, a sample hole 5 for the sample 5 to penetrate through is formed in the sealing cover 12 and the bottom plate, a sealing plug is arranged in the sample hole 5, and the sample 5 penetrates through the sealing plug. Namely, the test section of the sample 5 is positioned in the medium groove 6, is in contact with the medium and is sealed by arranging a sealing plug to prevent the medium from leaking.
The cover 12 in this embodiment is further provided with a thermocouple 13, and the lower end of the thermocouple 13 penetrates through the cover 12 and extends into the medium tank 6. As shown in fig. 2, the thermocouple 13 is connected with the constant temperature circulation system 17 to control the temperature of the liquid in the constant temperature circulation system 17; the water inlet hole 8 and the water outlet hole 9 are communicated with a constant temperature circulating system 17, so that the temperature and the medium temperature in the water bath 7 are controlled.
The constant temperature circulation system 17 of the present embodiment includes a temperature controller, a circulation pump, and a heating water tank. The constant temperature circulating system 17 is connected with the water inlet hole 8 through a rubber hose. After one cycle, the water bath 7 returns to the heating water tank through a water outlet hole 9 of the water bath 7. The constant temperature circulation system 17 may provide an ambient temperature of-5 deg.C to 100 deg.C for the slow strain tensile test media. A flow control valve 18 is also arranged between the constant temperature circulating system 17 and the water inlet hole 8 to control the flow.
As shown in fig. 3, test specimen 5 is a flat dumbbell specimen 5. During testing, the sample 5 is fixed by rotating the threads through the lower fixing pin 1 and the upper fixing pin 2 and is connected with a testing machine through the upper fixing pin hole and the lower fixing pin hole. The test section is placed in a test medium groove 6, and the test sample 5 is sealed by a lower sealing plug 3 and an upper sealing plug 4, so that the medium is prevented from leaking. The medium loading container mainly comprises a test medium groove 6, a constant temperature water bath 7 and a sealing cover 12, wherein the whole container is connected with a lower fixing pin 1 through a connecting screw hole 14 (the lower fixing pin 1 has external threads), so that the whole container is fixed on the testing machine. The wall of the test medium tank 6 is designed into a curved surface, so that the heating area is enlarged, and the heating efficiency of the solution in the medium tank 6 is improved. The bottom of the test medium groove 6 is provided with an air inlet 10, on one hand, the air inlet can remove oxygen in the solution by introducing inert gas to keep the experimental environment in an oxygen-free state, and on the other hand, the pressure in the medium groove 6 can be adjusted by gas to keep the medium groove 6 in a low-pressure state. The gas can be discharged through the gas outlet 11 on the cover 12 after being introduced.
The constant temperature water bath 7 is positioned at the outer side of the test medium tank 6 and has the functions that a medium in the constant temperature medium circulating system enters the water bath 7 through a water inlet 8 of the constant temperature water bath, exits the water bath 7 through a water outlet 9 of the constant temperature water bath and returns to the constant temperature medium circulating system, so that the test medium in the test medium tank 6 is heated by constant temperature thermal circulation, and a test environment with a specific temperature is provided for a slow strain tensile test. Thereby realizing the stress corrosion sensitivity evaluation of the metal material under the specific temperature condition.
The sealing cover 12 of the medium groove 6 is used for providing a sealed experimental environment for a slow tensile test, and a sealing ring 15 is arranged below the sealing cover 12 of the medium groove 6 and is screwed tightly through threads to seal the experimental environment. The thermocouple 13 is immersed in the test medium and connected with the constant temperature medium circulating system, and can monitor the experiment environment temperature in real time, so that the environment temperature is kept in a constant state.
The test medium loading device for the metal material slow strain tensile test can make up the problem that the slow strain rate tensile test machine cannot evaluate the stress corrosion sensitivity in a room temperature or low pressure medium due to the lack of the test medium loading device, has small volume and light weight, and can reduce the using amount of test medium in the experimental process. Meanwhile, the device can be suitable for various testing machines lacking an environment medium container on the premise of not changing the structure of the existing slow strain rate tensile testing machine. The method can accurately provide a stable experimental environment for the slow strain tensile test of the metal sample, and provides an equipment foundation for researching the stress corrosion sensitivity evaluation of the metal material in different medium environments.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the utility model, and not to limit the scope of the utility model, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The utility model provides a test medium loading device of tensile test of slow strain which characterized in that: the water bath comprises a water bath and a medium groove arranged in the water bath, the water bath comprises a bottom plate, a side plate and a sealing cover, a water inlet hole and a water outlet hole are formed in the side plate, the bottom plate corresponds to the medium groove and is provided with an air inlet hole, and the sealing cover corresponds to the medium groove and is provided with an air outlet hole.
2. The test medium loading device according to claim 1, wherein: the seal cover is provided with a first seal ring corresponding to the periphery of the side plate and a second seal ring corresponding to the periphery of the medium groove.
3. The test medium loading device according to claim 2, wherein: and the second sealing ring is in threaded connection with the upper end of the medium groove.
4. The test medium loading device according to claim 1, wherein: and sealing rings are arranged between the sealing cover and the top of the side plate and between the sealing cover and the top of the medium groove.
5. The test medium loading device according to claim 1, wherein: the side wall of the medium groove is arranged in a curved surface mode.
6. The test medium loading device according to claim 1, wherein: the device comprises an upper fixing pin and a lower fixing pin, wherein the upper fixing pin and the lower fixing pin are used for fixing the end part of a sample.
7. The test medium loading device according to claim 6, wherein: the bottom plate is provided with a screw hole extending downwards, and the lower fixing pin is connected to the bottom plate through the screw hole.
8. The test medium loading device according to claim 6, wherein: the test sample penetrates through the sealing cover, the medium groove and the bottom plate, a test sample hole for the test sample to penetrate through is formed in the sealing cover and the bottom plate, a sealing plug is arranged in the test sample hole, and the test sample penetrates through the sealing plug.
9. The test medium loading device according to any one of claims 1 to 8, wherein: including a thermocouple extending through the cap and into the media tank.
10. A slow strain tensile test apparatus comprising a test medium loading device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121078912.2U CN215574174U (en) | 2021-05-19 | 2021-05-19 | Test medium loading device for slow strain tensile test and slow strain tensile test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121078912.2U CN215574174U (en) | 2021-05-19 | 2021-05-19 | Test medium loading device for slow strain tensile test and slow strain tensile test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215574174U true CN215574174U (en) | 2022-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121078912.2U Active CN215574174U (en) | 2021-05-19 | 2021-05-19 | Test medium loading device for slow strain tensile test and slow strain tensile test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215574174U (en) |
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2021
- 2021-05-19 CN CN202121078912.2U patent/CN215574174U/en active Active
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