CN217304658U - High-strength steel sample delayed fracture test device - Google Patents
High-strength steel sample delayed fracture test device Download PDFInfo
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- CN217304658U CN217304658U CN202220522116.1U CN202220522116U CN217304658U CN 217304658 U CN217304658 U CN 217304658U CN 202220522116 U CN202220522116 U CN 202220522116U CN 217304658 U CN217304658 U CN 217304658U
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- strength steel
- steel sample
- pressure sensor
- device base
- delayed fracture
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Abstract
The utility model discloses a high-strength steel sample delayed fracture test device, which comprises a device base and a pressure sensor arranged on the device base; the device is characterized in that a threaded hole is formed in the lower portion of the device base, an acid solution containing area is arranged inside the device base, a sealing cover is arranged at the top of the acid solution containing area, coaxial central holes are formed in the sealing cover and the pressure sensor, threads are formed in two ends of the high-strength steel sample, one end of the high-strength steel sample is screwed into the threaded hole formed in the lower portion of the device base, and the other end of the high-strength steel sample is screwed into the nut after penetrating through the central holes of the sealing cover and the pressure sensor. Compared with the prior art, the utility model has the positive effects that: 1. the device has simple structure and simple operation, and improves the test efficiency. 2. Simple operation and high safety. 3. The loading load precision is high. 4. The time to break is accurately recorded.
Description
Technical Field
The utility model relates to a device for high strength steel delayed fracture is experimental solves the problem that present high strength steel delayed fracture test frock is complicated, complex operation.
Background
Hydrogen embrittlement fracture is a common problem of high-strength steel in use, and in order to reduce or eliminate the occurrence probability of the hydrogen embrittlement fracture problem, the high-strength steel needs to be subjected to hydrogen embrittlement delayed fracture detection, and the most common test method at present is a ' constant load tensile test ' method in GB/T39039 ' evaluation method for hydrogen induced delayed fracture of high-strength steel. However, no unique specification is made in GB/T39039 for a specific test device and operation method of the constant load tensile test, and the most common test scheme at present applies a constant load by using a lever principle, as shown in FIG. 1. However, the test device of the scheme is heavy, needs to move weights and needs a special field, and is not beneficial to simultaneously carrying out multiple groups of tests; after the sample is broken, the acidic solution is easy to splash, and the safety is low; the load loading precision through the weight is not high; the recorded break time is inaccurate.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above shortcoming of prior art, the utility model provides a high strength steel sample delayed fracture test device for the delayed fracture test of high strength steel aims at overcoming the defect that current "constant load tensile test" scheme exists.
The utility model provides a technical scheme that its technical problem adopted is: a high-strength steel sample delayed fracture test device comprises a device base and a pressure sensor arranged on the device base; the device is characterized in that a threaded hole is formed in the lower portion of the device base, an acid solution containing area is arranged inside the device base, a sealing cover is arranged at the top of the acid solution containing area, coaxial central holes are formed in the sealing cover and the pressure sensor, threads are formed in two ends of the high-strength steel sample, one end of the high-strength steel sample is screwed into the threaded hole formed in the lower portion of the device base, and the other end of the high-strength steel sample is screwed into the nut after penetrating through the central holes of the sealing cover and the pressure sensor.
Further, the pressure sensor is connected with the paperless recorder through the transmitter.
Further, the pressure sensor is provided with uniformly distributed bolt holes, and the pressure sensor is connected with the device base through bolts.
Furthermore, a clamping surface is arranged at the lower end of the device base.
Further, the sealing cover is provided with a rubber sealing ring.
Further, the pressure sensor is an annular pressure sensor.
Compared with the prior art, the utility model has the positive effects that:
1. the device has simple structure, small placing field and can simultaneously carry out a plurality of groups of tests. The nut is rotated to load and unload, so that the operation is simple; the volume is extremely small (the diameter of revolution is less than 120mm), so the occupied area is small and the device can move in the loading process if necessary; because the occupied area is small, a plurality of groups of tests can be simultaneously carried out, and the test efficiency is improved.
2. Simple operation and high safety. According to the scheme, the nut is rotated in the loading and unloading process, and weights do not need to be moved; the acid solution is not easy to splash after the fracture.
3. The loading load precision is high, the accurate control of the force value of the applied load can be realized by utilizing the annular pressure sensor, and manual correction can be carried out when the force value changes in the test process.
4. The time to break is accurately recorded. The device can display and record the load value in real time and can also accurately record the breaking time of the sample.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a test protocol of a prior delayed fracture test "constant load tensile test";
FIG. 2 is a front view of the testing device of the present invention;
fig. 3 is a sectional view a-a of fig. 2.
Detailed Description
A high-strength steel sample delayed fracture test device is structurally shown in figures 2 and 3 and comprises: but nut 1, pressure sensor 2, sealed lid 3, device base 4, base clamping face 5, acid solution splendid attire district 6, high strength steel sample 7, bolt hole 8 etc. wherein:
the high-strength steel sample 7 is made into a structural form with threads at two ends, one end of the high-strength steel sample is screwed into a threaded hole at the lower part of the base 4 of the device, the other end of the high-strength steel sample penetrates through the sealing cover 3 and a central hole of the pressure sensor 2, and an acid solution containing area 6 is arranged inside the base 4 of the device and used for containing the prepared acid test solution. Set up the external screw thread in 7 upper ends of high strength steel samples, exert test load to pressure sensor 2 through screwing nut 1 on the external screw thread of sample upper end, pressure sensor 2 passes through the changer to be connected with the paperless record appearance, shows and takes notes the load value in real time. The pressure sensor 2 is provided with 3-8 evenly distributed bolt holes 8, and the pressure sensor 2 is connected with the device base 4 through bolts. The lower end of the device base 4 is provided with a clamping surface 5 which is used for being clamped by bench clamp and can fix the test device in the process of load application.
An acid solution containing area 6 arranged in the device base 4 is a space for storing acid solutions such as HCl and the like, and the high-strength steel sample 7 is charged with hydrogen by using the acid solutions. The sealing cover 3 is matched with a rubber sealing ring for use, so that the leakage of an acidic solution is prevented, the danger to test operators can be avoided, and the corrosion to the pressure sensor 2 can also be avoided.
The test device comprises the following installation steps:
step one, clamping and fixing a device base 4 on bench clamp through a clamping surface 5;
step two, processing two ends of the high-strength steel sample 7 into threaded structures, and screwing the lower end of the high-strength steel sample 7 into a threaded hole in the lower part of the device base 4;
filling acid solutions such as HCl and the like into an acid solution containing area 6 arranged in the device base 4 so as to conveniently and subsequently charge hydrogen into the high-strength steel sample 7;
step four, the sealing cover 3 is matched with a rubber sealing ring and arranged at the top of the acid solution containing area 6 to seal the acid solution containing area;
step five, connecting and fixing the pressure sensor 2 with the device base 4 through bolts;
step six, connecting the pressure sensor 2 with a paperless recorder through a transmitter;
step seven, screwing the nut 1 into the upper end of the high-strength steel sample 7 until the pressure value displayed by the paperless recorder meets the requirement, (and performing screwing supplement when the pressure is attenuated);
and step eight, displaying, recording and storing the test load pressure in real time by the paperless recorder.
The utility model has the characteristics that:
(1) the clamping surface 5 arranged on the test device base 4 is convenient for clamping and fixing the test device; the threaded hole at the lower part of the device base 4 is convenient for connecting and fixing the high-strength steel sample 7 and assembling and disassembling the sample;
(2) the sealing form of matching the sealing cover 3 with the rubber sealing ring is beneficial to preventing the leakage of the acid solution;
(3) the pressure sensor 2 and the device base 4 are connected through bolts, so that the pressure sensor can be conveniently disassembled and assembled, and the measurement of the test load pressure is convenient;
(4) the high-strength steel sample 7 applies load through rotation of the nut 1 and is transmitted to the pressure sensor 2, so that the pressure sensor 2 can conveniently measure; the measuring signal is transmitted to the paperless recorder through the transmitter, so that the measuring data can be conveniently displayed, recorded and stored in real time.
Claims (6)
1. The utility model provides a high strength steel sample delayed fracture test device which characterized in that: comprises a device base and a pressure sensor arranged on the device base; the device comprises a device base and is characterized in that a threaded hole is formed in the lower portion of the device base, an acid solution containing area is arranged inside the device base, a sealing cover is arranged at the top of the acid solution containing area, coaxial central holes are formed in the sealing cover and a pressure sensor, two ends of a high-strength steel sample are threaded, one end of the high-strength steel sample is screwed into the threaded hole formed in the lower portion of the device base, and the other end of the high-strength steel sample is screwed into a nut after penetrating through the central holes of the sealing cover and the pressure sensor.
2. The high-strength steel sample delayed fracture test device according to claim 1, characterized in that: and the pressure sensor is connected with the paperless recorder through the transmitter.
3. The high-strength steel sample delayed fracture test device according to claim 1, characterized in that: the pressure sensor is provided with uniformly distributed bolt holes, and the pressure sensor is connected with the device base through bolts.
4. The high-strength steel sample delayed fracture test device according to claim 1, characterized in that: the lower end of the device base is provided with a clamping surface.
5. The high-strength steel sample delayed fracture test device according to claim 1, characterized in that: the sealing cover is a sealing cover with a rubber sealing ring.
6. The high-strength steel sample delayed fracture test device according to claim 1, characterized in that: the pressure sensor is an annular pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220522116.1U CN217304658U (en) | 2022-03-09 | 2022-03-09 | High-strength steel sample delayed fracture test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220522116.1U CN217304658U (en) | 2022-03-09 | 2022-03-09 | High-strength steel sample delayed fracture test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217304658U true CN217304658U (en) | 2022-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220522116.1U Active CN217304658U (en) | 2022-03-09 | 2022-03-09 | High-strength steel sample delayed fracture test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217304658U (en) |
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2022
- 2022-03-09 CN CN202220522116.1U patent/CN217304658U/en active Active
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