CN108169030B - High-temperature stretching experiment device and method for realizing uniform heating of sample - Google Patents
High-temperature stretching experiment device and method for realizing uniform heating of sample Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 23
- 238000002474 experimental method Methods 0.000 title claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 24
- 239000010949 copper Substances 0.000 claims abstract description 24
- 230000006698 induction Effects 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 7
- 229910001566 austenite Inorganic materials 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 5
- 239000012720 thermal barrier coating Substances 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000004088 simulation Methods 0.000 abstract description 6
- 238000011156 evaluation Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 2
- 239000007921 spray Substances 0.000 abstract description 2
- 238000009864 tensile test Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000077 insect repellent Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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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
- G01N3/068—Special adaptations of indicating or recording means with optical 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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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
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a high-temperature stretching experimental device for realizing uniform heating of a sample piece, which is characterized by taking a horizontal electronic universal stretcher as a main body and comprising the following steps: the stretching mechanism is respectively connected with a movable cross beam and a right fixed cross beam of the horizontal electronic universal stretcher through bolts by a left stretching rod and a right stretching rod; a high-temperature resistant pin is embedded in the cylindrical copper electrode, the exposed end of the upper part of the high-temperature resistant pin is provided with a thread, and the high-temperature resistant pin is matched with the left stretching rod and the right stretching rod to clamp a stretching sample piece and form a current path; the device also comprises a high-frequency induction coil, a CCD camera, an infrared thermometer, a high-pressure air spray head and a temperature control device. The invention can realize rapid heating and heat preservation of the magnetic permeability sample, can effectively reduce the temperature gradient in the gauge length of the stretching sample, and ensures the uniformity of the temperature of the stretching sample, thereby improving the accuracy of experimental data and providing effective data support for finite element numerical simulation and material performance evaluation.
Description
Technical Field
The invention relates to the field of high-temperature material performance test, in particular to a high-temperature stretching experimental device and method for realizing uniform heating of a sample.
Background
Lightweight is a research hotspot of current transportation equipment. The application of the high-strength metal plate can effectively lighten the weight of equipment and meet the requirement of safety. However, the high-strength sheet metal has poor toughness at room temperature, and is prone to cracking, wrinkling and other problems during the forming process, and meanwhile, the rebound problem of the formed piece is serious, so that the high-strength sheet metal is difficult to meet the quality requirement of the formed piece during room-temperature forming.
The hot stamping forming technology can effectively improve the formability of the high-strength metal sheet and is beneficial to the stamping forming of complex parts. In the thermoforming process, a high strength sheet is first heated to a certain temperature and then rapidly transferred to a die for press forming and dwell quenching. During this time, a severe heat exchange between the sheet and the die occurs. Thus, hot stamping is a process in which the temperature of the sheet material continuously changes. The change in temperature can have a significant effect on the mechanical properties of the material.
In modern industrial production, finite element simulation is an indispensable technical link. The method can effectively predict and evaluate the forming performance of the plate under a certain process, and is beneficial to the optimization of engineers on the forming process. The accuracy of finite element simulation is strongly dependent on the constitutive relation of materials, so that accurate obtaining of stress-strain data of a high-strength plate at high temperature is a necessary condition for ensuring the accuracy of the thermoforming finite element simulation. On the other hand, the high-temperature stretching data of the material can also be used as an important basis for evaluating the performance of the material.
In order to obtain high-temperature tensile data of a material and research the high-temperature mechanical properties of the material, china patent with application number 201410140121.6 discloses an electrified thermal tensile test device and a tensile test method. The temperature of the tensile test piece is monitored through the infrared temperature measuring sensor and fed back to the temperature comparator, and the temperature comparator converts the temperature difference into an electric signal and outputs the electric signal to the power regulator so as to realize the constancy of the temperature of the tensile test piece. Then, simply adopting the mode of electric heating, the sample temperature must exist great temperature gradient along the tensile direction, and its general rule is that the intermediate temperature is high, and both sides temperature gradually reduces. Thus, the obtained stretch data is inaccurate. The Chinese patent with application number 201611113306.3 discloses a high-temperature stretching experimental device. The patent uses an electromagnetic induction coil around the sample to heat, which can simulate the real production environment, but the induction coil around the sample can prevent the installation of deformation measuring devices such as a high-temperature extensometer and the like, so that the stress-strain curve of the sample cannot be accurately obtained.
Disclosure of Invention
According to the technical problems that the temperature of the sample is constant and difficult to control during high-temperature stretching, the material stretching data is inaccurate and the like, which affect the thermal forming finite element analysis, the high-temperature stretching experimental device and the method for realizing uniform heating of the sample are provided. The invention mainly heats the sample rapidly and uniformly and can realize the heat preservation function; meanwhile, according to the process requirements, the sample can be rapidly cooled, so that experimental results can be effectively supported for finite element simulation and material performance evaluation.
The invention adopts the following technical means:
the utility model provides a realize high temperature tensile experimental apparatus of even heating of sample, its characterized in that, this experimental apparatus regard horizontal electronic omnipotent stretcher as the main part, includes:
the stretching mechanism is respectively connected with the movable cross beam and the right fixed cross beam of the horizontal electronic universal stretcher through bolts by a left stretching rod and a right stretching rod;
the cylindrical copper electrode is a left cylindrical copper electrode and a right cylindrical copper electrode respectively, a high-temperature-resistant pin is embedded in the cylindrical copper electrode, the exposed end of the upper part of the high-temperature-resistant pin is provided with threads, the high-temperature-resistant pin is matched with the left stretching rod and the right stretching rod to clamp a stretching sample piece, a current path is formed, and the heat preservation of the stretching sample piece at high temperature is realized through electrifying;
the high-frequency induction coil is arranged at the rear of the stretching sample piece and is positioned at the same height as the stretching sample piece, and is used for quickly and uniformly heating the stretching sample piece to a preset temperature when in operation;
the CCD camera is arranged in front of the stretching sample piece and is used for shooting the deformation of the stretching sample piece in the high-temperature stretching process;
the infrared thermometer is arranged in front of the stretching sample piece and is used for detecting and feeding back the instant temperature of the stretching sample piece;
the high-pressure air spray nozzle is arranged at the rear of the stretching sample piece and is positioned at the same height as the stretching sample piece and is used for quenching specific materials;
and the temperature control device is used for controlling the experimental temperature and adjusting the high-frequency induction output power and the current output.
Further, the high-frequency induction coil is matched with the size of the stretching sample, and the shape and the size can be adjusted according to the size of the stretching sample so as to ensure the uniformity of the temperature of the stretching sample.
Further, the contact ends of the left stretching rod and the right stretching rod with the stretching sample piece are provided with thermal barrier coatings for effectively blocking heat exchange between the stretching sample piece and the stretching mechanism, so that the temperature uniformity of the stretching sample piece is ensured.
The invention also discloses a method for realizing uniform heating and high-temperature stretching of the sample by using the experimental device, which is characterized by comprising the following steps:
s1, a stretching sample piece with black and white high-temperature-resistant speckles sprayed on the surface is matched with a left stretching rod and a right stretching rod through high-temperature-resistant pins arranged in a left cylindrical copper electrode and a right cylindrical copper electrode respectively to clamp the stretching sample piece, and a current path is formed by the stretching sample piece and a horizontal electronic universal stretcher;
s2, the stretching sample piece is quickly and uniformly heated to a preset austenite temperature by adopting a high-frequency induction coil, and then the temperature of the stretching sample piece is constant by adopting an electrifying mode, so that the austenite structure of the stretching sample piece is homogenized;
s3, detecting and feeding back the instant temperature of the stretching sample piece by adopting a thermal infrared imager while the step S2 is carried out;
s4, rapidly cooling the austenitic sample to a preset test temperature by adopting a high-pressure air nozzle positioned behind the stretching sample; controlling the experimental temperature through a temperature control device, and adjusting the high-frequency induction output power and the current output;
s5, shooting and recording the deformation of the stretching sample piece by adopting a CCD camera, and then realizing calculation of strain by using image analysis software, wherein the method is suitable for stretching sample pieces with different gauge length sizes; and calculating to obtain the high-temperature stress-strain data of the stretching sample piece by combining the force data acquired by the horizontal electronic universal stretching machine.
Compared with the prior art, the invention has the following advantages:
1) According to the invention, the high-frequency induction coil is arranged behind the stretching sample piece, so that on one hand, the rapid and uniform heating of the stretching sample piece can be realized, and on the other hand, the strain measurement cannot be influenced;
2) According to the invention, the thermal barrier coating is coated at the contact end of the stretching sample piece and the left and right stretching rods, so that the heat exchange between the high-temperature stretching sample piece and the left and right stretching rods can be effectively reduced, and the temperature uniformity of the sample piece is ensured;
3) According to the invention, the high-temperature stretching sample is subjected to heat preservation treatment in an electrode electrifying mode, so that the experimental conditions of isothermal stretching can be ensured;
4) The invention is provided with the high-pressure air nozzle, and can rapidly cool the high-temperature stretching sample piece so as to simulate different forming processes.
In conclusion, the invention can realize rapid heating and heat preservation of the magnetic permeability sample, can effectively reduce the temperature gradient in the gauge length of the stretching sample, and ensures the uniformity of the temperature of the stretching sample, thereby improving the accuracy of experimental data and providing effective and reliable data support for finite element numerical simulation and material performance evaluation.
Based on the reasons, the invention can be widely popularized in the field of high-temperature material performance test.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a high temperature tensile test apparatus according to the present invention.
Fig. 2 is a schematic structural view of the left stretching rod of the present invention, (a) is a front view, and (b) is a right view.
Fig. 3 is a schematic structural view of the right stretching rod of the present invention, (a) is a front view, and (b) is a left view.
Fig. 4 is a schematic structural view of a cylindrical copper electrode according to the present invention, (a) is a front view, and (b) is a top view.
Fig. 5 is a schematic structural diagram of a high-frequency induction coil according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a tensile sample in an embodiment of the present invention.
In the figure: 1. a left stretching rod; 2. a right stretching rod; 3. a high-frequency induction coil; 4. a left cylindrical copper electrode; 5. a right cylindrical copper electrode; 6. a high pressure air jet; 7. a CCD camera I; 8. a CCD camera II; 9. an infrared thermometer; 10. a thermal barrier coating; 11. stretching the sample piece; 12. a nut; 13. a temperature control device; 14. a horizontal electronic universal stretcher.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a high-temperature tensile test apparatus for uniformly heating a sample is provided, in which a tensile sample 11 (as shown in fig. 6) is a high-strength steel plate with black and white specks sprayed on the surface, and the tensile sample 11 is required to be rapidly cooled from a high-temperature austenitic state to a test temperature according to an actual hot stamping process.
The experimental device takes a horizontal electronic universal stretcher 14 as a main body and comprises:
the stretching mechanism is formed by connecting a left stretching rod 1 (shown in fig. 2, the front end of the stretching rod is provided with a stepped table structure according to actual needs) and a right stretching rod 2 (shown in fig. 3, the tail ends of the left stretching rod 1 are different from the tail ends of the left stretching rod and the right stretching rod, which are connected with a horizontal electronic universal stretcher 14) with a movable cross beam and a right fixed cross beam of the horizontal electronic universal stretcher 14 respectively through bolts; the contact ends of the left stretching rod 1, the right stretching rod 2 and the stretching sample piece 11 are provided with the thermal barrier coating 10, so that heat exchange between the stretching sample piece 11 and the stretching mechanism can be effectively blocked.
The cylindrical copper electrodes (as shown in fig. 4) are a left cylindrical copper electrode 4 and a right cylindrical copper electrode 5 respectively, a high-temperature resistant pin is embedded in the cylindrical copper electrodes, the exposed end of the upper part of the high-temperature resistant pin is provided with threads, and in the experiment, the high-temperature resistant pins on the left cylindrical copper electrode 4 and the right cylindrical copper electrode 5 are matched with the left stretching rod 1 and the right stretching rod 2 to form a sample fixture, the high-temperature resistant pins are sequentially inserted into round holes at the two ends of a stretching sample 11 and the ends of the left stretching rod and the right stretching rod, and are fixed through nuts 12, so that the clamping of the stretching sample 11 is realized, and a current path is formed;
the high-frequency induction coil 3 (shown in fig. 5) is a mosquito-repellent incense disc and is arranged behind the stretching sample piece 11, and when the device works, the stretching sample piece 11 is quickly and uniformly heated to the austenite temperature, and further, the heat preservation of the stretching sample piece 11 at the high temperature is realized by electrifying, so that the homogenization of the austenite structure of the sample piece is realized; the high-frequency induction coil 3 is matched with the size of the stretching sample 11, and the shape and the size are adjusted according to the size of the stretching sample 11.
The infrared thermometer 9 is arranged in front of the stretching sample piece 11 and is used for detecting and feeding back the instant temperature of the stretching sample piece 11;
the high-pressure air nozzle 6 is arranged behind the stretching sample piece 11 and is used for rapidly cooling the austenite sample piece to a test temperature;
in the experiment, the left stretching rod 1 moves leftwards, and the right stretching rod 2 is fixed so as to stretch the stretching sample piece 11; a temperature control device 13 for controlling the experimental temperature and adjusting the high-frequency induction output power and the current output;
the left CCD camera and the right CCD camera, namely the CCD camera I7 and the CCD camera II 8, are arranged in front of the lens, are provided with optical filters and are arranged in front of the stretching sample piece 11 and are used for shooting deformation of the stretching sample piece 11 in a high-temperature stretching process, and then the strain calculation is realized through image analysis software. And finally, calculating to obtain high-temperature stress-strain data of the high-strength steel plate sample by combining the high-temperature stress-strain data with the force data acquired by the stretcher.
The invention also discloses a method for realizing uniform heating and high-temperature stretching of the sample by using the experimental device, which comprises the following steps:
s1, clamping a stretching sample 11 is achieved by matching a high-temperature resistant pin arranged in a left cylindrical copper electrode 4 and a right cylindrical copper electrode 5 with the left stretching rod 1 and the right stretching rod 2 respectively, and a current path is formed by the stretching sample 11 and a horizontal electronic universal stretcher 14;
s2, the high-frequency induction coil 3 is adopted to rapidly and uniformly heat the stretching sample piece 11 to a preset austenite temperature, and then the constant temperature of the stretching sample piece 11 is realized in an electrifying mode, so that the homogenization of the austenite structure of the stretching sample piece 11 is realized;
s3, detecting the temperature of the stretching sample piece 11 and feeding back the instant temperature of the stretching sample piece 11 by adopting a thermal infrared imager 9 while the step S2 is carried out;
s4, rapidly cooling the austenite state sample to a preset test temperature by adopting a high-pressure air nozzle 6 positioned behind the stretching sample 11; the experimental temperature is controlled by a temperature control device 13, and the high-frequency induction output power and the current output are regulated;
s5, shooting and recording deformation of the stretching sample piece 11 by adopting a CCD camera I7 and a CCD camera II 8, and then calculating strain by image analysis software; the high temperature stress-strain data of the tensile sample 11 is calculated by combining the force data collected by the horizontal electronic universal stretcher 14.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (3)
1. The high-temperature stretching experiment method for realizing uniform heating of the sample is characterized in that an experiment device applied by the method takes a horizontal electronic universal stretcher (14) as a main body and comprises the following steps:
the stretching mechanism is respectively connected with a movable cross beam and a right fixed cross beam of the horizontal electronic universal stretcher (14) through bolts by a left stretching rod (1) and a right stretching rod (2);
the cylindrical copper electrode is a left cylindrical copper electrode (4) and a right cylindrical copper electrode (5) respectively, a high-temperature-resistant pin is embedded in the cylindrical copper electrode, the exposed end of the upper part of the high-temperature-resistant pin is provided with threads, the high-temperature-resistant pin is matched with the left stretching rod (1) and the right stretching rod (2) to clamp a stretching sample piece (11) and form a current path, and the heat preservation of the stretching sample piece (11) at high temperature is realized by electrifying;
the high-frequency induction coil (3) is arranged behind the stretching sample piece (11) and is positioned at the same height as the stretching sample piece (11), and is used for quickly and uniformly heating the stretching sample piece (11) to a preset temperature when in operation;
the CCD camera is arranged in front of the stretching sample piece (11) and is used for shooting the deformation of the stretching sample piece (11) in the high-temperature stretching process;
the infrared thermometer (9) is arranged in front of the stretching sample piece (11) and is used for detecting and feeding back the instant temperature of the stretching sample piece (11);
the high-pressure air nozzle (6) is arranged behind the stretching sample piece (11) and is positioned at the same height as the stretching sample piece (11) and is used for quenching specific materials;
the temperature control device (13) is used for controlling the experimental temperature and adjusting the high-frequency induction output power and the current output;
the method comprises the following steps:
s1, a stretching sample piece (11) with black and white high-temperature-resistant speckles sprayed on the surface is matched with a left stretching rod (1) and a right stretching rod (2) through high-temperature-resistant pins arranged in a left cylindrical copper electrode (4) and a right cylindrical copper electrode (5) respectively to clamp the stretching sample piece (11), and a current path is formed between the stretching sample piece and a horizontal electronic universal stretcher (14);
s2, the high-frequency induction coil (3) is adopted to rapidly and uniformly heat the stretching sample piece (11) to a preset austenite temperature, and then the constant temperature of the stretching sample piece (11) is realized in an electrified mode, so that the homogenization of the austenite structure of the stretching sample piece (11) is realized;
s3, detecting and feeding back the instant temperature of the stretching sample piece (11) by adopting an infrared thermometer (9) while the step S2 is carried out;
s4, rapidly cooling the austenite state sample to a preset test temperature by adopting a high-pressure air nozzle (6) positioned behind the stretching sample (11); the experimental temperature is controlled by a temperature control device (13), and the high-frequency induction output power and the current output are regulated;
s5, shooting and recording the deformation of the stretching sample piece (11) by adopting a CCD camera, and then calculating the strain by using image analysis software; and calculating to obtain high-temperature stress-strain data of the stretching sample piece (11) by combining the force data acquired by the horizontal electronic universal stretcher (14).
2. The high-temperature stretching experimental method for realizing uniform heating of a sample according to claim 1, wherein the high-frequency induction coil (3) is matched with the size of the stretching sample (11), and the shape and the size are adjusted according to the size of the stretching sample (11).
3. The high-temperature stretching experiment method for realizing uniform heating of a sample according to claim 1, wherein the contact ends of the left stretching rod (1) and the right stretching rod (2) with the stretching sample (11) are provided with a thermal barrier coating (10) for effectively blocking heat exchange between the stretching sample (11) and a stretching mechanism.
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| CN112945766B (en) * | 2021-01-28 | 2022-12-09 | 西安交通大学 | Equivalent verification test method for reliability of thermal protection coating under high-temperature, high-pressure and high-frequency working conditions |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58186030A (en) * | 1982-04-24 | 1983-10-29 | Nhk Spring Co Ltd | Testing apparatus of heating and cooling |
| JP2006162472A (en) * | 2004-12-08 | 2006-06-22 | Sumitomo Metal Ind Ltd | Method, device and test piece for testing thermal fatigue |
| CN103900911A (en) * | 2014-04-09 | 2014-07-02 | 西北工业大学 | Electrified thermal stretching testing device and stretching testing method |
| CN103995551A (en) * | 2014-05-29 | 2014-08-20 | 江苏大学 | Device and method for assisting in achieving hot forming testing and variable-rate cooling of metal sheet |
| CN104502203A (en) * | 2015-01-08 | 2015-04-08 | 哈尔滨工业大学 | Testing device for current auxiliary type micro-stretching mechanical property of metal thin plate |
| CN204924996U (en) * | 2015-08-21 | 2015-12-30 | 中钢集团邢台机械轧辊有限公司 | Hot fatigue testing machine of roll |
| CN106769429A (en) * | 2017-01-20 | 2017-05-31 | 东北大学 | The improved method that a kind of thermal expansion phase transformation instrument drawing by high temperature sample has thermograde |
| CN106769525A (en) * | 2016-11-28 | 2017-05-31 | 哈尔滨工业大学 | The system and method for testing of tested conductor material mechanical performance under vacuum environment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7363822B2 (en) * | 2005-02-11 | 2008-04-29 | Dynamic Systems Inc. | Technique for applying direct resistance heating current to a specific location in a specimen under test while substantially reducing thermal gradients in the specimen gauge length |
-
2018
- 2018-03-13 CN CN201810205628.3A patent/CN108169030B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58186030A (en) * | 1982-04-24 | 1983-10-29 | Nhk Spring Co Ltd | Testing apparatus of heating and cooling |
| JP2006162472A (en) * | 2004-12-08 | 2006-06-22 | Sumitomo Metal Ind Ltd | Method, device and test piece for testing thermal fatigue |
| CN103900911A (en) * | 2014-04-09 | 2014-07-02 | 西北工业大学 | Electrified thermal stretching testing device and stretching testing method |
| CN103995551A (en) * | 2014-05-29 | 2014-08-20 | 江苏大学 | Device and method for assisting in achieving hot forming testing and variable-rate cooling of metal sheet |
| CN104502203A (en) * | 2015-01-08 | 2015-04-08 | 哈尔滨工业大学 | Testing device for current auxiliary type micro-stretching mechanical property of metal thin plate |
| CN204924996U (en) * | 2015-08-21 | 2015-12-30 | 中钢集团邢台机械轧辊有限公司 | Hot fatigue testing machine of roll |
| CN106769525A (en) * | 2016-11-28 | 2017-05-31 | 哈尔滨工业大学 | The system and method for testing of tested conductor material mechanical performance under vacuum environment |
| CN106769429A (en) * | 2017-01-20 | 2017-05-31 | 东北大学 | The improved method that a kind of thermal expansion phase transformation instrument drawing by high temperature sample has thermograde |
Non-Patent Citations (1)
| Title |
|---|
| 张方举 等.一种改进的金属材料的高温动态拉伸实验技术.《实验力学》.2011,第26卷(第06期),750-754. * |
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