A high-temperature environment sample bending test device and test method

Abstract

The application discloses a sample bending test device and test method in a high-temperature environment. The sample bending test device comprises a base, a lower clamp assembly connected to the upper part of the base, an upper pressing tool assembly above the lower clamp assembly, and a mechanical loading mechanism connected to the upper pressing tool assembly. The upper pressing tool assembly and the lower clamp assembly are symmetrically provided with a first heating furnace body and a second heating furnace body. The first heating furnace body has a first cavity, two heating lamp tubes symmetrically arranged upward and downward are arranged in the first cavity, and the inner side wall of the first cavity is an arc-shaped first reflecting surface. A first cooling cavity is formed in the first heating furnace body. The internal structure of the second heating furnace body is consistent with that of the first heating furnace body. Under the action of the reflection focusing mechanism, the test temperature of the test sample area can reach 1500 DEG C at most, and the temperature rising speed can reach 50 DEG C / s, which provides a hardware foundation for simulating the rapid thermal shock and thermal fatigue performance of materials in extreme service environments.

Description

Technical Field

[0001] This invention relates to the field of material performance testing, and in particular to a specimen bending test apparatus and test method in a high-temperature environment. Background Technology

[0002] In cutting-edge fields such as aerospace, nuclear engineering, and hypersonic vehicles, critical structural components (such as ceramic matrix composites and ultra-high temperature alloys) often need to withstand extremely high temperature loads and complex mechanical stresses during actual service. In order to accurately assess the reliability of these materials under extreme environments, it is necessary to simulate their high-temperature mechanical properties in a laboratory environment, among which high-temperature bending tests are one of the most basic and critical testing methods.

[0003] However, existing high-temperature mechanical testing equipment has shortcomings in practical applications: First, the heating rate of the testing equipment is slow, making it unable to simulate thermal shock. Traditional high-temperature furnaces mostly use resistance wire heating, which has high thermal inertia, and it usually takes several hours to heat up to above 1000 ℃. This not only results in low testing efficiency but also fails to simulate the extreme "thermal shock" conditions experienced by materials during actual service. Second, conventional radiation heating lacks effective energy focusing methods, leading to significant heat loss. To achieve test temperatures above 1500 ℃, extremely high power is often required, which can easily cause the entire testing equipment to overheat. In addition, during long-term or high-power high-temperature testing, a large amount of residual heat radiated outward from the furnace body will be conducted to the supporting base and mechanical loading mechanism. This can easily lead to thermal deformation of the mechanical structure, reduce the accuracy of sensor testing, and may even directly cause damage to expensive mechanical loading systems (such as sensors and actuators) due to overheating. Summary of the Invention

[0004] In view of this, the present invention provides a specimen bending test device and test method in a high-temperature environment. The main purpose is to detect the bending resistance of the specimen under rapid heating and high-temperature environment, so as to provide technical support for further optimization design and safety analysis.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A first aspect of the present invention provides a specimen bending test apparatus for a high-temperature environment. The specimen bending test apparatus includes: a base with a lower clamp assembly connected to its upper part for supporting the test specimen; an upper pressure assembly above the lower clamp assembly; a mechanical loading mechanism connected to the upper pressure assembly for driving the upper pressure assembly downward and detecting the load applied to the test specimen; the upper pressure assembly and the lower clamp assembly cooperate to apply a bending action to the test specimen;

[0007] The upper pressure assembly and the lower clamping assembly are symmetrically arranged with a first heating furnace body and a second heating furnace body. The first heating furnace body has a first cavity open to the upper pressure assembly and / or the lower clamping assembly, and the second heating furnace body has a second cavity open to the upper pressure assembly and / or the lower clamping assembly. The first heating furnace body and the second heating furnace body can be in a spliced ​​state and a separated state.

[0008] The first cavity contains two heating lamps arranged symmetrically vertically, and the inner wall of the first cavity is a first reflective surface arranged symmetrically vertically. The second cavity contains two heating lamps arranged symmetrically vertically, and the inner wall of the second cavity is a second reflective surface arranged symmetrically vertically. When the first and second heating furnace bodies are joined together, the first and second cavities together form a heating chamber. The first and second reflective surfaces reflect the heat from the heating lamps and concentrate it in the test sample area. The length direction of the test sample is parallel to the length direction of the heating lamps.

[0009] The first heating furnace body has a first cooling chamber inside. The first heating furnace body is provided with a first liquid inlet and a first liquid outlet that are respectively connected to the first cooling chamber. The first liquid inlet and the first liquid outlet are connected to an external liquid supply device through pipelines.

[0010] The second heating furnace body has a second cooling chamber inside. The second heating furnace body is provided with a second liquid inlet and a second liquid outlet that are respectively connected to the second cooling chamber. The second liquid inlet and the second liquid outlet are connected to an external liquid supply device.

[0011] The specimen bending test apparatus also includes a temperature detection element for detecting the temperature of the test specimen area within the heating chamber.

[0012] According to the aforementioned high-temperature environment specimen bending test device, the specimen bending test device further includes a drive mechanism for switching between the spliced ​​state and the separated state of the first heating furnace body and the second heating furnace body; the drive mechanism is connected to one or both of the first heating furnace body and the second heating furnace body, and the drive mechanism drives one or both of the first heating furnace body and the second heating furnace body to move.

[0013] Furthermore, the driving mechanism is a three-way linear motion device, and the first heating furnace body and / or the second heating furnace body are connected to the moving end of the three-way linear motion device; the three-way linear motion device includes an X-axis linear motion device, a Y-axis linear motion device and a Z-axis linear motion device;

[0014] The X-axis linear moving device moves in a first horizontal direction, approaching or moving away from the mating surface between the first and second heating furnace bodies; the Y-axis linear moving device moves in a second horizontal direction perpendicular to the X-axis linear moving device; and the Z-axis linear moving device moves in a vertical direction perpendicular to the horizontal plane formed by the X-axis and Y-axis.

[0015] Furthermore, the X-axis linear motion device, the Y-axis linear motion device, and the Z-axis linear motion device independently employ electric actuators or manual adjustment mechanisms.

[0016] According to the aforementioned high-temperature environment sample bending test apparatus, the surfaces of the first and second reflective surfaces are gold-plated.

[0017] According to the aforementioned high-temperature environment sample bending test device, the upper pressure assembly and the lower clamp assembly are made of silicon carbide.

[0018] According to the aforementioned high-temperature environment sample bending test device, the upper pressure assembly consists of an upper connecting seat, an upper connecting rod, and an upper pressure head from top to bottom, with the bottom end of the upper pressure head being an arc surface;

[0019] The upper connecting seat is detachably connected to the mechanical loading mechanism.

[0020] According to the aforementioned high-temperature environment sample bending test device, the lower clamp assembly consists of a lower connecting seat, a lower connecting rod, and a bending support from bottom to top. The top of the bending support has symmetrical arc-shaped support surfaces on both sides, and a columnar support is provided inside the arc-shaped support surface. The test sample is on the columnar support and is in contact with the arc surface of the columnar support.

[0021] The lower connecting part is detachably connected to the base.

[0022] Furthermore, a snap-fit ​​protrusion is formed at the top of the lower connecting rod, and a snap-fit ​​groove is formed at the bottom of the curved support to cooperate with the snap-fit ​​protrusion, so that the lower connecting rod and the curved support are detachably connected.

[0023] A second aspect of the present invention provides a method for testing the bending of a specimen in a high-temperature environment, the method employing the high-temperature environment specimen bending test apparatus described in the first aspect of the present invention; the specimen bending test method includes the following steps:

[0024] S1. Place the prepared test sample onto the lower fixture assembly;

[0025] S2. The first heating furnace body and the second heating furnace body are joined together, and the first cavity and the second cavity form a heating cavity;

[0026] S3. The liquid supply device operates, supplying cooling medium to the first and second cooling chambers; and controlling the heating lamp tubes to rise in temperature.

[0027] S4. When the temperature of the test sample area in the heating chamber reaches the set value and is kept at that temperature for 5 minutes, the mechanical loading mechanism is controlled to run, and the upper pressure assembly is pressed down to apply a load to the sample.

[0028] S5. After the test sample is completed, control the heating lamp to stop heating. After the heating chamber temperature cools down to room temperature, separate the first heating furnace body and the second heating furnace body, take out the test sample, and turn off the liquid supply device.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) Under the effect of the reflection focusing mechanism, the test temperature of the test sample area of ​​the present invention can reach up to 1500 ℃ and the heating rate can reach 50 ℃ / second, which greatly improves the test efficiency and provides a hardware foundation for simulating the rapid thermal shock and thermal fatigue performance of materials under extreme service environment.

[0031] (2) The present invention removes the residual heat of the first and second heating furnace bodies by forced convection heat exchange, ensuring that the radiant heat inside the furnace is efficiently focused on the central test area, and controls the surface temperature of the heating furnace body within a safe range. Under the action of the cooling structure, the bottom overheating is avoided, which would cause damage to the mechanical test system.

[0032] (3) The temperature detection device of the present invention, together with the temperature control function of the cooling system and the high-response heating lamp, can establish a high-precision, high-response dynamic temperature control closed-loop system to ensure the stability and accuracy of the temperature curve during the test. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the specimen bending test apparatus.

[0034] Figure 2 This is a schematic diagram of the first and second heating furnace bodies in the specimen bending test apparatus when they are separated.

[0035] Figure 3 This is a schematic diagram of the first and second heating furnace bodies in the specimen bending test apparatus when they are joined together.

[0036] Figure 4 This is a top view of the first and second heating furnace bodies in the specimen bending test apparatus, with them joined together.

[0037] Figure 5 for Figure 4 Sectional view along the middle AA direction;

[0038] Figure 6 for Figure 4 Sectional view along the BB direction;

[0039] Figure 7 A three-dimensional structural diagram showing the combination of the first heating furnace body, the second heating furnace body, and the heating lamp tube;

[0040] Figure 8 This is a three-dimensional structural diagram of the upper presser assembly;

[0041] Figure 9 for Figure 8 A magnified view of a section at point C;

[0042] Figure 10 This is a three-dimensional structural diagram of the lower presser assembly;

[0043] Figure 11 A three-dimensional structural diagram of the bending support section;

[0044] Figure 12 This is a three-dimensional structural diagram of the lower connecting seat and the lower connecting rod of the lower clamp assembly.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Test specimen; 1. Base; 2. Lower clamp assembly; 21. Lower connecting seat; 22. Lower connecting rod; 221. Snap-fit ​​protrusion; 23. Bending support; 231. Arc-shaped support surface; 232. Snap-fit ​​groove; 24. Columnar support; 3. Upper pressure assembly; 31. Upper connecting seat; 32. Upper connecting rod; 33. Upper pressure head; 4. Mechanical loading mechanism; 5. First heating furnace body; 51. First cavity; 52. First reflective surface; 53. First cooling chamber; 54. First liquid inlet connection port; 55. First liquid outlet connection port; 6. Second heating furnace body; 61. Second cavity; 62. Second reflective surface; 63. Second cooling chamber; 64. Second liquid inlet connection port; 65. Second liquid outlet connection port; 7. Heating lamp tube; 8. Temperature detection element; 9. Drive mechanism. Detailed Implementation

[0047] To make the technical problem to be solved, the technical solution and advantages of the present invention clearer, the following description will be provided in conjunction with the accompanying drawings. Figures 1 to 12 The technical solution of the present invention will be clearly and completely described in conjunction with specific embodiments.

[0048] This invention provides a high-temperature environment specimen bending test device for performing bending tests on test specimens 100 at high temperatures.

[0049] like Figure 1As shown, the specimen bending test apparatus includes a base 1, a clamp assembly, a mechanical loading mechanism 4, a first heating furnace body 5, and a second heating furnace body 6. The clamp assembly consists of a lower clamp assembly 2 and an upper pressure assembly 3, which are used to support the test specimen 100 and perform a bending test under the action of the mechanical loading mechanism 4.

[0050] The base 1 is connected to a lower clamp assembly 2, which supports the test specimen 100. Above the lower clamp assembly 2 is an upper pressure assembly 3, which is connected to a mechanical loading mechanism 4. The mechanical loading mechanism 4 drives the upper pressure assembly 3 to move downward and detects the load applied to the test specimen. The upper pressure assembly 3 and the lower clamp assembly 2 cooperate to apply a bending force to the test specimen 100.

[0051] like Figure 1 and Figure 2 As shown, a first heating furnace body 5 and a second heating furnace body 6 are symmetrically arranged on the left and right sides of the upper pressure assembly 3 and the lower clamping assembly 2. The first heating furnace body 5 has a first cavity 51 open to one side of the upper pressure assembly 3 and / or the lower clamping assembly 2, and the second heating furnace body 6 has a second cavity 61 open to one side of the upper pressure assembly 3 and / or the lower clamping assembly 2. The first heating furnace body 5 and the second heating furnace body 6 can be in a spliced ​​state and a separated state.

[0052] The splicing surfaces of the first heating furnace body 5 and the second heating furnace body 6 are provided with vertical clearance grooves, which serve as channels for the upper pressure assembly 3 and the lower clamping assembly 2. After the first heating furnace body 5 and the second heating furnace body 6 are spliced ​​together, the upper pressure assembly 3 and the lower clamping assembly 2 are located in the clearance grooves of the first heating furnace body 5 and the second heating furnace body 6.

[0053] like Figure 5 and Figure 7 As shown, two heating lamps 7 are symmetrically arranged vertically within the first cavity 51, and the inner wall of the first cavity 51 is a symmetrically arranged arc-shaped first reflective surface 52. Two heating lamps 7 are symmetrically arranged vertically within the second cavity 61, and the inner wall of the second cavity 61 is a symmetrically arranged arc-shaped second reflective surface 62. When the first heating furnace body 5 and the second heating furnace body 6 are joined together, the first cavity 51 and the second cavity 61 together form a heating chamber. The first reflective surface 52 and the second reflective surface 62 reflect the heat from the heating lamps 7 and concentrate it in the area of ​​the test sample 100; the length direction of the test sample 100 is parallel to the length direction of the heating lamps 7. Specifically, the heating lamps 7 are quartz tubes.

[0054] This invention utilizes symmetrically arranged arc-shaped reflective surfaces (first reflective surface 52 and second reflective surface 62) on the inner walls of the first cavity 51 and the second cavity 61. When the two furnace bodies are joined, the thermal radiation emitted by the quartz heating lamp 7 can be precisely and efficiently focused onto the central test sample 100 area. Under the effect of the reflection focusing mechanism, the test temperature in the test sample area can reach a maximum of 1500 ℃, with a heating rate of 50 ℃ / second. This effect perfectly solves the problem of slow heating in traditional resistance furnaces, significantly improving testing efficiency and providing a technical hardware foundation for simulating the rapid thermal shock and thermal fatigue performance of materials under extreme service environments.

[0055] like Figure 5 As shown, a first cooling chamber 53 is formed inside the first heating furnace body 5. The first heating furnace body 5 is provided with a first liquid inlet 54 and a first liquid outlet 55, which are respectively connected to the first cooling chamber 53. The first liquid inlet 54 and the first liquid outlet 55 are connected to an external liquid supply device through pipelines. The first liquid inlet 54 and the first liquid outlet 55 are arranged vertically on the first heating furnace body 5, with the first liquid inlet 54 located at the bottom and the first liquid outlet 55 located at the top, forming convection of the cooling medium. A second cooling chamber 63 is formed inside the second heating furnace body 6. The second heating furnace body 6 is provided with a second liquid inlet 64 and a second liquid outlet 65, which are respectively connected to the second cooling chamber 63. The second liquid inlet 64 and the second liquid outlet 65 are connected to an external liquid supply device. When the liquid supply device is running, it supplies cooling medium to the first cooling chamber 53 and the second cooling chamber 63 and controls the heating lamp 7 to heat up. By using forced convection heat exchange to remove residual heat from the first heating furnace body 5 and the second heating furnace body 6, the residual heat is efficiently focused on the central testing area, while the surface temperature of the heating furnace body is controlled within a safe range. The cooling structure also prevents overheating at the bottom, which could damage the mechanical testing system. Furthermore, the cooling structure reduces the temperature in the area where the heating lamp 7 is located, providing good protection for the lamp, extending its lifespan, and reducing equipment maintenance costs. Water can be used as the cooling medium.

[0056] like Figure 8 As shown, the specimen bending test apparatus also includes a temperature sensing element 8, used to detect the temperature of the test specimen 100 region within the heating chamber. The temperature sensing element 8 employs a double platinum-rhodium thermocouple (measuring range 0~1800℃) or an infrared optical thermometer (measuring range 1500~2200℃), with the measuring point being the test specimen 100 region. The temperature sensing element, in conjunction with the temperature control function of the cooling system and the high-response heating lamp, establishes a high-precision, high-response dynamic temperature control closed-loop system, ensuring the stability and accuracy of the temperature curve during the test. The temperature sensing element 8 is connected to the control system, transmitting the temperature signal to the control system.

[0057] In some specific embodiments, the specimen bending test apparatus further includes a drive mechanism 9 for switching between the spliced ​​state and the separated state of the first heating furnace body 5 and the second heating furnace body 6, such as... Figure 1 As shown. The drive mechanism 9 can move one or both of the first heating furnace body 5 and the second heating furnace body 6, realizing the switching between the spliced ​​state and the separated state of the first heating furnace body 5 and the second heating furnace body 6. The drive mechanism 9 can move the first heating furnace body 5 and / or the second heating furnace body 6 only in the front-back direction, or it can move the first heating furnace body 5 and / or the second heating furnace body 6 in the front-back, left-right, and up-down directions.

[0058] Furthermore, the drive mechanism 9 is a three-axis linear motion device, with the first heating furnace body 5 and / or the second heating furnace body 6 connected to the moving end of the three-axis linear motion device; the three-axis linear motion device includes an X-axis linear motion device, a Y-axis linear motion device, and a Z-axis linear motion device. The X-axis linear motion device moves in a first horizontal direction towards or away from the mating surface of the first heating furnace body 5 and the second heating furnace body 6; the Y-axis linear motion device moves in a second horizontal direction perpendicular to the X-axis linear motion device; and the Z-axis linear motion device moves in a vertical direction perpendicular to the horizontal plane formed by the X-axis and Y-axis. Furthermore, the X-axis, Y-axis, and Z-axis linear motion devices independently employ electric actuators or manual adjustment mechanisms. When high-precision automated control is desired or remote synchronous control is required, all three axes of linear motion devices employ electric actuators (preferably electric push rod structures, servo electric cylinders, or lead screw stepper motor structures).

[0059] In some specific embodiments, the surfaces of the first reflective surface 52 and the second reflective surface 62 are gold-plated. Through the specular thermal reflection effect, the radiated heat energy from the four heating lamps 7 is efficiently reflected and focused onto the central region of the cavity. This synergistic effect of geometric symmetry and high reflectivity reduces lateral heat loss and creates a uniform constant-temperature region with minimal temperature gradient at the center of the heating cavity.

[0060] The upper clamping assembly 3 and the lower clamping assembly 2 are made of silicon carbide. The upper clamping assembly 3 and the lower clamping assembly 2 do not deform under high temperature conditions, ensuring the smooth progress of the test.

[0061] In some specific embodiments, the structure of the upper pressure assembly 3 is as follows: Figure 8 and Figure 9As shown, the upper pressure assembly 3 consists of an upper connecting seat 31, an upper connecting rod 32, and an upper pressure head 33 from top to bottom. The bottom end of the upper pressure head 33 is an arc surface. The upper connecting seat 31, the upper connecting rod 32, and the upper pressure head 33 can be integral parts, i.e., the upper pressure assembly 3 is integrally formed, which facilitates manufacturing; or, the upper connecting seat 31 and the upper connecting rod 32, and the upper connecting rod 32 and the upper pressure head 33 can be detachably connected. Specifically, the detachable connection method can be a "nested-pin" connection structure. The upper connecting seat 31 is detachably connected to the mechanical loading mechanism 4, which can be a threaded connection or a pin-type connection structure. The arc surface at the bottom end of the upper pressure head 33 achieves linear contact of the pressure point during the test, thereby improving the test accuracy. At the same time, the arc surface structure is conducive to the normal transmission of the load and avoids load deflection.

[0062] In some specific embodiments, the structure of the lower clamp assembly 2 is as follows: Figure 10 As shown, the lower clamp assembly 2 consists of a lower connecting seat 21, a lower connecting rod 22, and a bending support 23 from bottom to top. The top of the bending support 23 has symmetrically arranged arc-shaped support surfaces 231 on both sides, and a columnar support member 24 is arranged inside the arc-shaped support surface 231. The test specimen 100 is placed on the columnar support member 24 and in contact with the arc surface of the columnar support member 24. The two ends of the test specimen 100 make point contact with the arc of the columnar support member 24, which is conducive to the normal transmission of load and avoids load deflection. The lower connecting seat 21 is detachably connected to the base 1. The lower connecting seat 21, the lower connecting rod 22, the bending support 23, and the columnar support member 24 can be integral parts, that is, the lower clamp assembly 2 is integrally molded, which is convenient for manufacturing; or, the lower connecting seat 21 and the lower connecting rod 22, and the lower connecting rod 22 and the bending support 23 can be detachably connected. The lower connecting rod 22 and the bending support 23 are detachably connected, and the bending support 23 with different spans can be replaced. The bending support 23 can be flexibly replaced and adapted according to the size and specifications of the test specimen 100, making it widely applicable to testing.

[0063] Furthermore, the lower connecting rod portion 22 and the bending support portion 23 are detachably connected, one connection method being that the top end of the lower connecting rod portion 22 has a snap-fit ​​protrusion 221, such as... Figure 12 As shown; the bottom end of the curved support portion 23 has a snap-fit ​​groove 232 that mates with the snap-fit ​​protrusion 221, as shown. Figure 11 As shown, the lower connecting rod portion 22 and the bending support portion 23 are detachably connected.

[0064] This invention also provides a method for testing specimen bending in a high-temperature environment, wherein the method utilizes the high-temperature specimen bending test apparatus described in the first aspect of this invention; the method includes the following steps:

[0065] S1. Place the prepared test sample 100 on the lower clamp assembly 2;

[0066] S2. The first heating furnace body 5 and the second heating furnace body 6 are spliced ​​together, and the first cavity 51 and the second cavity 61 form a heating cavity;

[0067] S3. The liquid supply device operates, supplying cooling medium to the first cooling chamber 53 and the second cooling chamber 63; and controlling the heating lamp tube 7 to heat up.

[0068] S4. When the temperature of the test sample 100 area in the heating chamber reaches the set value and is kept at that temperature for 5 minutes, the mechanical loading mechanism 4 is controlled to run, and the upper pressure assembly 3 is pressed down to apply a load to the sample.

[0069] S5. After the test sample 100 is completed, control the heating lamp 7 to stop heating. After the heating chamber temperature cools down to room temperature, separate the first heating furnace body 5 and the second heating furnace body 6, take out the test sample 100, and turn off the liquid supply device.

[0070] The high-temperature environment specimen bending test method has the same technical effect as the high-temperature environment specimen bending test device, which will not be elaborated here.

[0071] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0072] In the description of this invention, it should be understood that the terms "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating orientation or positional relationships, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0073] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0074] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A specimen bending test apparatus for high-temperature environment, comprising: A base (1) has a lower clamp assembly (2) connected to its upper part, the lower clamp assembly (2) being used to support the test specimen (100); an upper pressure assembly (3) is located above the lower clamp assembly (2); a mechanical loading mechanism (4) is connected to the upper pressure assembly (3), the mechanical loading mechanism (4) being used to drive the upper pressure assembly (3) to move downward and detect the load applied to the test specimen; the upper pressure assembly (3) and the lower clamp assembly (2) cooperate with each other to apply a bending action to the test specimen (100); characterized in that: The upper pressure assembly (3) and the lower clamp assembly (2) are symmetrically arranged with a first heating furnace body (5) and a second heating furnace body (6). The first heating furnace body (5) has a first cavity (51) open to the upper pressure assembly (3) and / or the lower clamp assembly (2). The second heating furnace body (6) has a second cavity (61) open to the upper pressure assembly (3) and / or the lower clamp assembly (2). The first heating furnace body (5) and the second heating furnace body (6) can be in a spliced ​​state and a separated state. The first cavity (51) is provided with two heating lamps (7) arranged symmetrically at the top and bottom. The inner wall of the first cavity (51) is a first reflective surface (52) arranged symmetrically at the top and bottom. The second cavity (61) is provided with two heating lamps (7) arranged symmetrically at the top and bottom. The inner wall of the second cavity (61) is a second reflective surface (62) arranged symmetrically at the top and bottom. When the first heating furnace body (5) and the second heating furnace body (6) are in the splicing state, the first cavity (51) and the second cavity (61) together form a heating cavity. The first reflective surface (52) and the second reflective surface (62) reflect the heat of the heating lamps (7) and concentrate it in the area of ​​the test sample (100). The length direction of the test sample (100) is parallel to the length direction of the heating lamps (7). The first heating furnace body (5) has a first cooling chamber (53) inside. The first heating furnace body (5) is provided with a first liquid inlet (54) and a first liquid outlet (55) that are respectively connected to the first cooling chamber (53). The first liquid inlet (54) and the first liquid outlet (55) are connected to an external liquid supply device through pipelines. The second heating furnace body (6) has a second cooling chamber (63) inside. The second heating furnace body (6) is provided with a second liquid inlet (64) and a second liquid outlet (65) that are respectively connected to the second cooling chamber (63). The second liquid inlet (64) and the second liquid outlet (65) are connected to an external liquid supply device. The specimen bending test apparatus also includes a temperature detection element (8) for detecting the temperature of the test specimen (100) area inside the heating chamber.

2. The high-temperature environment specimen bending test apparatus according to claim 1, characterized in that, It also includes a drive mechanism (9) for switching between the spliced ​​state and the separated state of the first heating furnace body (5) and the second heating furnace body (6); the drive mechanism (9) is connected to one or both of the first heating furnace body (5) and the second heating furnace body (6), and the drive mechanism (9) drives one or both of the first heating furnace body (5) and the second heating furnace body (6) to move.

3. The high-temperature environment specimen bending test apparatus according to claim 2, characterized in that, The drive mechanism (9) is a three-way linear motion device. The first heating furnace body (5) and / or the second heating furnace body (6) are connected to the moving end of the three-way linear motion device. The three-way linear motion device includes an X-axis linear motion device, a Y-axis linear motion device and a Z-axis linear motion device. The X-axis linear moving device moves in a first horizontal direction toward or away from the mating surface of the first heating furnace body (5) and the second heating furnace body (6); the Y-axis linear moving device moves in a second horizontal direction perpendicular to the X-axis linear moving device; and the Z-axis linear moving device moves in a vertical direction perpendicular to the horizontal plane formed by the X-axis and Y-axis.

4. The high-temperature environment specimen bending test apparatus according to claim 3, characterized in that, The X-axis linear motion device, Y-axis linear motion device, and Z-axis linear motion device independently employ electric actuators or manual adjustment mechanisms.

5. The high-temperature environment specimen bending test apparatus according to claim 1, characterized in that, The surfaces of the first reflective surface (52) and the second reflective surface (62) are gold-plated.

6. The high-temperature environment specimen bending test apparatus according to claim 1, characterized in that, The upper clamping assembly (3) and the lower clamping assembly (2) are made of silicon carbide.

7. The high-temperature environment specimen bending test apparatus according to claim 1, characterized in that, The upper pressure assembly (3) consists of an upper connecting seat (31), an upper connecting rod (32), and an upper pressure head (33) from top to bottom. The bottom end of the upper pressure head (33) is an arc surface. The upper connecting seat (31) is detachably connected to the mechanical loading mechanism (4).

8. The high-temperature environment specimen bending test apparatus according to claim 1, characterized in that, The lower clamp assembly (2) consists of a lower connecting seat (21), a lower connecting rod (22), and a bending support (23) from bottom to top. The top of the bending support (23) has symmetrical arc-shaped support surfaces (231) on both sides, and a columnar support (24) is provided inside the arc-shaped support surface (231). The test specimen (100) is on the columnar support (24) and is in contact with the arc surface of the columnar support (24). The lower connecting seat (21) is detachably connected to the base (1).

9. The high-temperature environment specimen bending test apparatus according to claim 8, characterized in that, The lower connecting rod (22) has a snap-fit ​​protrusion (221) at the top and a snap-fit ​​groove (232) at the bottom of the curved support (23) that matches the snap-fit ​​protrusion (221). The lower connecting rod (22) and the curved support (23) are detachably connected.

10. A method for testing the bending of a specimen in a high-temperature environment, characterized in that, The specimen bending test method uses the specimen bending test apparatus for high-temperature environment as described in any one of claims 1 to 9; the specimen bending test method includes the following steps: S1. Place the prepared test specimen (100) on the lower clamp assembly (2); S2. The first heating furnace body (5) and the second heating furnace body (6) are spliced ​​together, and the first cavity (51) and the second cavity (61) form a heating cavity; S3. The liquid supply device operates, supplying cooling medium to the first cooling chamber (53) and the second cooling chamber (63); and controlling the heating lamp tube (7) to heat up; S4. When the temperature of the test specimen (100) area in the heating chamber reaches the set value and is kept warm for 5 minutes, the mechanical loading mechanism (4) is controlled to run, and the upper pressure assembly (3) is pressed down to apply a load to the specimen. S5. After the test sample (100) is completed, control the heating lamp (7) to stop heating. After the heating chamber temperature cools down to room temperature, separate the first heating furnace body (5) and the second heating furnace body (6), take out the test sample (100), and turn off the liquid supply device.

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