CN113008695A - Creep property testing device for heat-resistant steel micro-sample for power station - Google Patents
Creep property testing device for heat-resistant steel micro-sample for power station Download PDFInfo
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- CN113008695A CN113008695A CN202110245636.2A CN202110245636A CN113008695A CN 113008695 A CN113008695 A CN 113008695A CN 202110245636 A CN202110245636 A CN 202110245636A CN 113008695 A CN113008695 A CN 113008695A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0688—Time or frequency
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a creep property testing device for a heat-resistant steel micro-sample for a power station, wherein weights are placed on a supporting seat, the upper end of a punch rod is connected with the supporting seat, the lower end of the punch rod penetrates through an upper cross beam and is inserted into a quartz tube, the upper end of the quartz tube is fixed on the upper cross beam, the lower end of the quartz tube is fixed on a lower cross beam, an open-type tube furnace is sleeved on the outer side of the quartz tube, a clamp is arranged in the quartz tube and comprises an upper clamp and a lower clamp, wherein a sample to be tested is clamped between the upper clamp and the lower clamp, the lower end of the punch rod penetrates through the lower clamp and is contacted with the central position of the upper surface of a sample to be tested, the upper end of the quartz rod is contacted with the central position of the bottom of the sample to be tested, the lower end of the quartz rod penetrates through the, the device can accurately measure the relation between the deformation of the micro sample and the time, and has the characteristic of short test time.
Description
Technical Field
The invention belongs to the field of mechanical property testing of metal materials, and relates to a creep property testing device for a heat-resistant steel micro-sample for a power station.
Background
Due to the particularity of energy resources in China, thermal power generation is still the main mode of power resource supply and storage in China. With the continuous increase of the demand of China on electric power, thermal power generation equipment is continuously optimized and improved, and an ultra-supercritical thermal power generator set becomes the first choice equipment at present. The operating temperature of the ultra-supercritical thermal power generating unit is higher than 600 ℃, the internal steam pressure is high, the service environment is severe, the operating conditions are harsh, and the requirements on the performance of key component materials of the unit are high.
The creep performance of a thermal power generating set is an important basis for measuring the service life and the operation condition of the set when the thermal power generating set works under a high-temperature working condition for a long time, a single-shaft creep tensile test method is generally adopted for testing the creep performance at present by using a standard creep sample, but the method has the problems of large sample size, long test time consumption, high cost, high consumption and the like, and for an in-service set, the standard creep sample is prepared and needs to be directly cut and sampled on equipment/parts in service, so that the equipment is directly damaged and cannot be used, which is the biggest defect of the method at present. Therefore, it is the best way to solve the above problems at present to develop a new micro-sample testing device and creep performance testing method for non-destructive sampling of in-service equipment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a creep property testing device for a heat-resistant steel micro-sample for a power station, which can accurately measure the relation between the deformation of the micro-sample and the time and has the characteristics of short test time, low cost and less consumption.
In order to achieve the purpose, the creep property testing device for the heat-resistant steel micro-sample for the power station comprises a supporting seat, a punch, an upper cross beam, a quartz tube, a lower cross beam, an open tubular furnace, a quartz rod, a displacement sensor, a supporting base and a displacement recorder, wherein the punch is arranged on the supporting seat;
the weight has been placed on the supporting seat, and the upper end of jumper bar is connected with the supporting seat, and the lower extreme of jumper bar passes the entablature and inserts in the quartz capsule, and on the entablature was fixed in to the upper end of quartz capsule, the lower extreme of quartz capsule was fixed in on the bottom end rail, and open tubular furnace cup joints in the outside of quartz capsule, is provided with anchor clamps in the quartz capsule, anchor clamps include anchor clamps and lower anchor clamps, and wherein, the sample centre gripping that awaits measuring between upper clamp and lower anchor clamps, the lower extreme of jumper bar passes the lower anchor clamps and contacts with the central point that awaits measuring the appearance upper surface, and the upper end of quartz bar contacts with the central point that awaits measuring the sample bottom, and the lower extreme of quartz bar cooperatees with displacement sensor after passing the lower anchor clamps, and.
The quartz tube is connected with the upper cross beam and the lower cross beam through flanges and bolts.
The upper clamp and the lower clamp are connected through a fastening bolt.
The ceramic tube is positioned in the quartz tube, the lower end of the ceramic tube is fixed on the lower cross beam, and the upper end of the ceramic tube is fixed on the lower clamp.
The device also comprises a K-type thermocouple for detecting the temperature in the quartz tube, wherein the K-type thermocouple is connected with the open tube furnace.
The punching die further comprises a sleeve, wherein the sleeve penetrates through the upper cross beam, and a sliding bearing is arranged between the sleeve and the punch.
The quartz tube protection device further comprises a gas protection system, wherein the gas protection system is communicated with the quartz tube.
The displacement sensor is fixed on the supporting base through the magnetic attraction base.
The invention has the following beneficial effects:
the creep property testing device for the heat-resistant steel micro-sample for the power station is convenient and simple to operate, low in cost and short in testing time, a sample to be tested is positioned in the quartz tube and clamped in the clamp, an acting force is applied to the central position of the upper part of the sample to be tested through the weight and the punch during measurement, meanwhile, the upper end of the quartz rod is in contact with the central position of the lower surface of the sample to be tested, the lower end of the quartz rod is matched with the displacement sensor, so that the change of the central deflection of the sample to be tested is directly measured, the relation between the deformation of the micro-sample and time is recorded, and the creep property of the sample is obtained according to the change of the central deflection of the sample.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an upper clamp according to the present invention;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 4 is a schematic view of the structure of the lower clamp of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
fig. 6 is a schematic structural view of a flange according to the present invention.
Wherein, 1 is a weight, 2 is a support base, 3 is a punch, 4 is an open tubular furnace, 5 is a clamp, 6 is a flange, 7 is a displacement sensor, 8 is a support base, 9 is a sleeve, 10 is an upper beam, 11 is a quartz tube, 12 is a fastening bolt, 13 is a ceramic tube, 14 is a K-type thermocouple, and 15 is a quartz rod.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 6, the creep property testing device for the heat-resistant steel micro-sample for the power station comprises a supporting seat 2, a punch 3, an upper cross beam 10, a quartz tube 11, a lower cross beam, an open tubular furnace 4, a quartz rod 15, a displacement sensor 7, a supporting base 8 and a displacement recorder, wherein the upper cross beam is arranged on the supporting seat 2; the weight 1 is placed on the supporting seat 2, the upper end of the punch 3 is connected with the supporting seat 2, the lower end of the punch 3 penetrates through the upper cross beam 10 and is inserted into the quartz tube 11, the upper end of the quartz tube 11 is fixed on the upper cross beam 10, the lower end of the quartz tube 11 is fixed on the lower cross beam, the open-type tube furnace 4 is sleeved outside the quartz tube 11, the clamp 5 is arranged in the quartz tube 11 and comprises an upper clamp and a lower clamp, wherein a sample to be tested is clamped between the upper clamp and the lower clamp, the lower end of the punch 3 penetrates through the lower clamp and is contacted with the central position of the upper surface of a sample to be tested, the upper end of the quartz rod 15 is contacted with the central position of the bottom of the sample to be tested, the lower end of the quartz rod 15 penetrates through the lower clamp and is matched with the displacement sensor 7, the displacement sensor 7 is positioned on the supporting base, the displacement sensor 7 is fixed on the supporting base 8 through the magnetic suction base.
The quartz tube 11 is connected with the upper crossbeam 10 and the lower crossbeam through the flange 6 and the bolt; the upper clamp and the lower clamp are connected through a fastening bolt 12.
The invention also comprises a gas protection system, a sleeve 9, a ceramic tube 13 and a K-type thermocouple 14 for detecting the temperature in the quartz tube 11, wherein the ceramic tube 13 is positioned in the quartz tube 11, the lower end of the ceramic tube 13 is fixed on the lower cross beam, and the upper end of the ceramic tube 13 is fixed on the lower clamp; the K-type thermocouple 14 is connected with the open type tube furnace 4; the sleeve 9 penetrates through the upper cross beam 10, and a sliding bearing is arranged between the sleeve 9 and the punch 3; the gas protection system is in communication with the quartz tube 11.
The upper surface of lower anchor clamps is provided with the cylindrical recess that is used for placing the sample, and this cylindrical recess is the same with the diameter of the sample that awaits measuring, can guarantee that the sample center that awaits measuring is in loading ram 3 under, and the sample specification is phi 8 x 0.5mm, can carry out the nondestructive sample to the equipment of being in service and not cause the destructive damage of equipment.
The lower terminal surface of going up anchor clamps is provided with the boss, the up end of lower anchor clamps be provided with boss matched with recess, and clearance fit between the two, anchor clamps are connected through fastening bolt 12 under with between the anchor clamps on it to exert the pretightning force to the sample that awaits measuring, effectively prevent that the sample from taking place relative slip and causing the test result accuracy to reduce between test procedure and anchor clamps, effectively guarantee that miniature sample can not take place the relative slip beyond the deformation at the test procedure, improve the measuring accuracy.
The upper end of the quartz rod is in contact with the center of the ground of the sample to be measured, and the quartz rod is matched with the displacement sensor, so that the change of the central deflection of the sample to be measured is directly measured, the measurement is more accurate compared with the measurement of the downward displacement of the punch rod, and the test error is reduced.
The punch 3 is of a stepped structure, so that the possibility of strength reduction of the punch 3 caused by stress concentration is effectively reduced.
The punch 3 is provided with a water cooling channel, so that the punch 3 is effectively prevented from generating thermal deformation during high-temperature testing, and the accuracy of a testing result is improved.
The gas protection system adopts 99.9% argon as the protective gas during the test, can prevent the surface oxidation of miniature sample during the test, the required precision when guaranteeing the sample test.
The specific test process of the invention is as follows:
1) the test sample to be tested is placed on the lower clamp, the lower clamp and the upper clamp are connected through the fastening bolt 12, and meanwhile pre-tightening force is exerted, so that the test sample to be tested cannot slide with the clamps in the test process.
2) The temperature required by the test is set, and protective gas is introduced before heating is started, so that the test accuracy is prevented from being influenced by the oxidation of the sample to be tested in a high-temperature environment.
3) And (3) preserving the temperature of the sample to be tested for 1-2 hours at the required temperature, then starting to apply a load, and simultaneously starting to record the displacement data of the central position of the sample to be tested until the sample breaks.
4) And outputting the displacement-time curve recorded by the displacement recorder, and performing equivalent transformation and analysis on the curve to finally obtain the creep performance parameters of the material.
Claims (8)
1. A creep property testing device for a heat-resistant steel micro-sample for a power station is characterized by comprising a supporting seat (2), a punch rod (3), an upper cross beam (10), a quartz tube (11), a lower cross beam, an open tubular furnace (4), a quartz rod (15), a displacement sensor (7), a supporting base (8) and a displacement recorder;
weights (1) are placed on the supporting seat (2), the upper end of a punch rod (3) is connected with the supporting seat (2), the lower end of the punch rod (3) penetrates through an upper cross beam (10) and is inserted into a quartz tube (11), the upper end of the quartz tube (11) is fixed on the upper cross beam (10), the lower end of the quartz tube (11) is fixed on a lower cross beam, an open tube furnace (4) is sleeved on the outer side of the quartz tube (11), a clamp (5) is arranged in the quartz tube (11), the clamp (5) comprises an upper clamp and a lower clamp, a sample to be tested is clamped between the upper clamp and the lower clamp, the lower end of the punch rod (3) penetrates through the lower clamp and is contacted with the central position of the upper surface of a sample to be tested, the upper end of a quartz rod (15) is contacted with the central position of the bottom of the sample to be tested, and the lower end of the quartz rod (15) penetrates, the displacement sensor (7) is positioned on the supporting base (8), and the output end of the displacement sensor (7) is connected with the displacement recorder.
2. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, wherein the quartz tube (11) is connected with the upper beam (10) and the lower beam through the flange (6) and the bolt.
3. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, wherein the upper clamp and the lower clamp are connected by a fastening bolt (12).
4. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, further comprising a ceramic tube (13), wherein the ceramic tube (13) is positioned in the quartz tube (11), the lower end of the ceramic tube (13) is fixed on the lower beam, and the upper end of the ceramic tube (13) is fixed on the lower clamp.
5. The creep property testing device for the heat-resistant steel micro-specimen for a power station according to claim 1, further comprising a K-type thermocouple (14) for detecting the temperature in the quartz tube (11), wherein the K-type thermocouple (14) is connected to the open tube furnace (4).
6. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, characterized by further comprising a sleeve (9), wherein the sleeve (9) penetrates through the upper cross beam (10), and a sliding bearing is arranged between the sleeve (9) and the punch (3).
7. The creep property testing device for the heat-resistant steel micro-specimen for the power station as claimed in claim 1, further comprising a gas protection system, wherein the gas protection system is communicated with the quartz tube (11).
8. The creep property testing device for the heat-resistant steel micro-sample for the power station as claimed in claim 1, wherein the displacement sensor (7) is fixed on the supporting base (8) through a magnetic base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110245636.2A CN113008695A (en) | 2021-03-05 | 2021-03-05 | Creep property testing device for heat-resistant steel micro-sample for power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110245636.2A CN113008695A (en) | 2021-03-05 | 2021-03-05 | Creep property testing device for heat-resistant steel micro-sample for power station |
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| Publication Number | Publication Date |
|---|---|
| CN113008695A true CN113008695A (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110245636.2A Pending CN113008695A (en) | 2021-03-05 | 2021-03-05 | Creep property testing device for heat-resistant steel micro-sample for power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112363A (en) * | 2021-11-29 | 2022-03-01 | 华东理工大学 | Displacement measurement system for high-temperature and high-pressure bulging test of metal sheet |
-
2021
- 2021-03-05 CN CN202110245636.2A patent/CN113008695A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112363A (en) * | 2021-11-29 | 2022-03-01 | 华东理工大学 | Displacement measurement system for high-temperature and high-pressure bulging test of metal sheet |
| CN114112363B (en) * | 2021-11-29 | 2022-11-11 | 华东理工大学 | Displacement measurement system for high-temperature and high-pressure bulging test of metal sheet |
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