High-temperature oxidation corrosion testing system

Abstract

The invention discloses a high-temperature oxidation corrosion testing system which comprises a heating furnace and a rack arranged below the heating furnace, an alundum tube is arranged in the heating furnace, a feeding mechanism extending into the alundum tube is arranged on one side of the heating furnace, and a gas supply mechanism is arranged on one side of the heating furnace; one side of the heating furnace is provided with a gas feeding pipe connected with the alundum tube, and a platinum-rhodium gas conveying pipe connected with a gas supply mechanism is arranged in the gas feeding pipe; the cantilever is arranged in the corundum tube in a sliding mode, the bearing frame is arranged on one side of the cantilever and used for bearing materials, the linear driving assembly is used for controlling the cantilever to move, and one side of the corundum tube penetrates through the heating furnace and is provided with an opening for the cantilever to enter and exit. The device is novel in design, the material testing efficiency is effectively improved through automatic material testing and control over the gas atmosphere at the high temperature, and the reliability of the testing result is improved by simulating the actual using working condition of the material through design of material thermal circulation.

Description

Technical Field

[0001] The invention relates to the technical field of material detection, and in particular to a high-temperature oxidation corrosion testing system. Background Art

[0002] In modern industrial applications, many materials need to be used for a long time in high temperature and complex environments, such as key components of aircraft engines, gas turbines, boilers and nuclear power equipment. These materials usually experience severe oxidation corrosion and aging in high temperature, water vapor and oxygen environments, which in turn affects their service life and reliability. Therefore, during material research and development and material selection, it is necessary to conduct appropriate high temperature oxidation corrosion tests on the materials to detect whether the performance of the materials meets the requirements.

[0003] Traditional high-temperature oxidation corrosion testing methods are usually only carried out under constant temperature and atmosphere conditions, which cannot fully reflect the complex thermal cycles and environmental changes experienced by the materials in actual applications, and the test reliability is generally average. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that the test is only carried out under constant temperature and atmosphere conditions, cannot fully reflect the complex thermal cycles and environmental changes experienced by the material in actual application, and has general test reliability, and to propose a high-temperature oxidation corrosion test system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high temperature oxidation corrosion test system comprises a heating furnace and a frame arranged below the heating furnace, wherein a corundum tube is arranged in the heating furnace, a feeding mechanism extending into the corundum tube is arranged on one side of the heating furnace, and a gas supply mechanism is arranged on one side of the heating furnace;

[0007] An air delivery pipe connected to the corundum tube is provided on one side of the heating furnace, and a platinum-rhodium air delivery pipe connected to the air supply mechanism is provided in the air delivery pipe;

[0008] The feeding mechanism includes a cantilever slidably arranged in the corundum tube, a support frame arranged on one side of the cantilever for supporting materials, and a linear drive component for controlling the movement of the cantilever, wherein one side of the corundum tube passes through the heating furnace and one side is provided with an opening for the cantilever to enter and exit.

[0009] Preferably, the gas supply mechanism is provided with a water vapor generator, the water vapor generator is provided with an air outlet pipe connected to the platinum-rhodium gas pipeline, and a heating belt is mounted on the outer side of the air outlet pipe.

[0010] More preferably, the air outlet pipe is provided with a stop valve, and the stop valve is provided with a drain outlet.

[0011] Preferably, a plurality of corundum cushion columns are provided at the lower end of the corundum tube.

[0012] Preferably, the linear drive assembly comprises a sliding support plate for fixedly mounting the cantilever and a ball screw module for driving the sliding support plate, and the ball screw module is fixedly mounted on the frame.

[0013] Preferably, the support bracket is made of a plurality of silicon carbide rods, and a platinum-rhodium tube is sleeved on the outer side of the silicon carbide rods.

[0014] Preferably, a thermocouple is slidably installed in the cantilever at a position corresponding to the placement of the material.

[0015] Preferably, a protective plate is mounted on the cantilever, and a protective frame is provided on one side of the heating furnace.

[0016] Preferably, a control component is provided in the rack, and an interaction component electrically connected to the control component is provided on one side of the rack.

[0017] A method for using a high temperature oxidation corrosion testing system comprises the following steps:

[0018] Step 1: Start the heating furnace for preheating, place the prepared material on the support frame for clamping, and move the thermocouple to make it contact with the material;

[0019] Step 2: Start the feeding mechanism to feed the material into the corundum tube, start the heating furnace for heating, and start the steam generator to introduce water vapor or a mixture of water vapor and argon into the corundum tube, heat it to the specified test temperature, and then keep it warm for a period of time;

[0020] Step 3: Start the feeding mechanism to move the material out of the heating furnace into the air. After cooling for a period of time, send it into the corundum tube for reheating. Repeat this process several times to complete the high temperature oxidation corrosion test.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, by cycling the material under high temperature and cooling conditions, the thermal cycle in actual application is simulated, which can effectively reproduce the thermal stress and oxidation reaction of the material under temperature change and environmental change, and ensure the reliability of the high temperature oxidation corrosion test of the material;

[0023] 2. In the present invention, by controlling the gas atmosphere under the high temperature environment of the material, the aging process of the material is accelerated, long-term performance data is obtained in a relatively short time, and the testing efficiency of the material is improved;

[0024] 3. In the present invention, the high-temperature oxidation corrosion detection of materials can be automated, and no human intervention is required during the long-term detection process, which greatly improves the detection efficiency of materials and the reliability of detection results.

[0025] The present invention is novel in design and effectively improves the material testing efficiency through automated material testing and control of gas atmosphere at high temperature. It also simulates the actual use conditions of the material through the design of the material thermal cycle, thereby improving the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the appearance structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of the heating furnace and the gas supply mechanism of the present invention.

[0028] Figure 3 It is a schematic diagram of the material removal state of the present invention.

[0029] Figure 4 It is a schematic diagram of the supporting frame structure of the present invention.

[0030] Figure 5 It is a schematic diagram of the heating furnace structure of the present invention.

[0031] Figure 6 It is a schematic structural diagram of the feeding mechanism of the present invention.

[0032] In the figure: heating furnace 1, protection frame 11, corundum tube 2, air supply pipe 21, platinum-rhodium air supply pipe 211, corundum cushion column 22, steam generator 3, air outlet pipe 31, heating belt 311, stop valve 32, feeding mechanism 4, cantilever 41, protection plate 411, support bracket 42, thermocouple 43, linear drive assembly 44, sliding support plate 441, ball screw module 442, frame 5, interactive assembly 51. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Reference Figure 1-6 A high temperature oxidation corrosion test system includes a heating furnace 1 and a frame 5 arranged below the heating furnace 1. A corundum tube 2 is arranged in the heating furnace 1. A feeding mechanism 4 extending into the corundum tube 2 is arranged on one side of the heating furnace 1. A gas supply mechanism is arranged on one side of the heating furnace 1. The heating furnace 1 uses silicon molybdenum rods for heating, and the furnace cavity temperature can be heated to 1700°C, meeting the high temperature oxidation corrosion test requirements of different materials.

[0035] One side of the heating furnace 1 is provided with an air delivery pipe 2 connected to the corundum tube 2, and a platinum-rhodium gas delivery pipe 211 connected to the gas supply mechanism is provided in the air delivery pipe 2. The gas supply mechanism cooperates with the platinum-rhodium gas delivery pipe 211 to fill the corundum tube 2 with gas such as water vapor or mixed gas, and perform high-temperature oxidation detection on the material in a high-temperature oxidation environment or other gas atmosphere set as needed.

[0036] The feeding mechanism 2 includes a cantilever 41 slidably arranged in the corundum tube 2, a support frame 42 for supporting materials arranged on one side of the cantilever 41, and a linear drive assembly 44 for controlling the movement of the cantilever 41, wherein one side of the corundum tube 2 passes through the heating furnace 1 and one side is provided with an opening for the cantilever 41 to enter and exit. The feeding mechanism 2 drives the material into the heating furnace 1 or removes the material from the heating furnace, which facilitates the automation of the high-temperature oxidation corrosion test process. The design of the feeding mechanism 2 also reduces manual participation and improves the safety of the high-temperature oxidation corrosion test.

[0037] Based on the above technical solution, when a high-temperature corrosion test of a material is required, the material is placed on a support frame 42, the cantilever 41 is driven to move by a linear drive assembly 44, the material is fed into the corundum tube 2, the heating furnace 1 is started for heating, and water vapor or a mixture of water vapor and argon is introduced into the corundum tube 2 in cooperation with the gas supply mechanism. According to different material testing requirements, the material is heated to 600-1200°C and kept warm for a period of time. According to actual material testing requirements, a suitable temperature and time are selected. After keeping warm for a period of time, the material is removed from the heating furnace and exposed to the air in cooperation with the feeding mechanism, simulating the thermal stress and strain caused by temperature changes in thermal materials in actual use, so as to ensure the reliability of the high-temperature oxidation corrosion test of the material.

[0038] In this technical solution, if Figure 1-5 As shown, the gas supply mechanism is provided with a water vapor generator 3, and the water vapor generator 3 is provided with an outlet pipe 31 connected to the platinum-rhodium gas pipe 211, and a heating belt 311 is sleeved on the outer side of the outlet pipe 31. A stop valve 32 is provided on the outlet pipe 31, and a drain port is provided on the stop valve 32. Through the design of the heating belt 311, the outlet pipe 31 is heated to ensure the temperature of the water vapor and avoid its condensation. Due to the good chemical inertness of the platinum-rhodium alloy in high temperature resistance and water vapor resistance, the gas pipe made of the platinum-rhodium alloy can ensure the stability of the water vapor sent at high temperature, and ensure that the water vapor and its protective gas can fill the surrounding of the material.

[0039] Water vapor can significantly accelerate the oxidative corrosion process of certain materials. Under high temperature conditions, water vapor can also react with the surface of metals or alloys to form volatile oxides or hydroxides, thereby accelerating the corrosion process. This acceleration effect helps to evaluate the long-term stability and durability of materials in a shorter time. The presence of water vapor can also change the composition and structure of the oxide film. For some metals, water vapor may cause the oxide film to be more porous or fragile, thereby affecting the protective ability of the material. By introducing water vapor, this change can be observed and analyzed, and help optimize the material's resistance to high-temperature oxidation. By mixing argon with water vapor, the oxygen partial pressure of the experimental atmosphere can be controlled to prevent excessive oxidation. In addition, argon can help evenly distribute water vapor to ensure consistent experimental conditions.

[0040] In this technical solution, if Figure 1-5 As shown, a plurality of corundum cushion columns 22 are provided at the lower end of the corundum tube 2 to support the corundum tube 2, thereby preventing the corundum tube 2 from bending and deforming in a high temperature environment and ensuring the stability of the corundum tube 2 in a long-term high temperature environment.

[0041] In this technical solution, if Figure 1-6 As shown, the linear drive assembly 44 includes a sliding support plate 441 for fixing the cantilever 41 and a ball screw module 442 for driving the sliding support plate 441, and the ball screw module 442 is fixedly mounted on the frame 5. The sliding support plate 441 is driven to slide stably by the ball screw module 442, and a weighing assembly for weighing the cantilever 41 can also be set on the sliding support plate 441. The weight of the material is monitored in real time by the weighing assembly, which is convenient for counting the weight change of the material due to high-temperature oxidation corrosion and facilitating the analysis of the material's resistance to high-temperature corrosion.

[0042] In this technical solution, if Figure 1-6 As shown, the support frame 42 is made of a plurality of silicon carbide rods, and a platinum-rhodium tube is sleeved on the outside of the silicon carbide rods. The selection of silicon carbide rods can ensure its service life in an environment of alternating high and low temperatures and water vapor, reduce the frequency of equipment maintenance, and through the design of the platinum-rhodium tube, avoid the support frame 42 from bonding with the material during the experiment, thereby ensuring the test effect of the material.

[0043] In this technical solution, if Figure 1-6 As shown, a thermocouple 43 is slidably installed in the cantilever 41 at the position corresponding to the placement of the material. The actual temperature of the material is detected by the thermocouple 43 to ensure the accuracy of the material test temperature and the reliability of the test result.

[0044] In this technical solution, if Figure 1-6As shown, a protective plate 411 is mounted on the cantilever 41, and a protective frame 11 is provided on one side of the heating furnace 1. The protective plate 411 prevents the high temperature of the furnace chamber of the heating furnace 1 from injuring people when the materials are removed, and the protective frame 11 also prevents the high temperature from affecting the surrounding environment. A receiving box can be provided on the lower side of the protective frame 11 to catch the materials when they fall accidentally, so as to prevent the high temperature materials from splashing and injuring people, thereby improving the safety of the equipment.

[0045] In this technical solution, if Figure 1-3 As shown, a control component is provided in the frame 5, and an interactive component 51 electrically connected to the control component is provided on one side of the frame 5. The control component is used to uniformly control the heating furnace 1, the steam generator 3, the thermocouple 43, the ball screw module 442 and peripheral equipment, etc. The operator can adjust the control component through the interactive component 51, which is convenient for the use of the test equipment.

[0046] In combination with the above technical solution, when using this test system, perform high temperature oxidation corrosion test according to the following steps:

[0047] Step 1: Start the heating furnace 1 for preheating, place the prepared material on the support frame 42 for clamping, and move the thermocouple 43 to make it abut against the material.

[0048] Step 2: Start the feeding mechanism 4 to feed the material into the corundum tube 2, start the heating furnace 1 for heating, and start the steam generator 3 to introduce water vapor or a mixture of water vapor and argon into the corundum tube 2, heat it to the specified test temperature and keep it warm for a period of time.

[0049] Step 3: Start the feeding mechanism 4 to move the material from the heating furnace 1 into the air, cool it down for a period of time, and then feed it into the corundum tube 2 for reheating. Repeat the process several times to complete the high-temperature oxidation corrosion test. Through reciprocating heating and cooling, combined with water vapor or other mixed gases, the oxidation corrosion environment of the material under actual working conditions is simulated. In addition, periodic high-temperature exposure and cooling in the air can accelerate the oxidation and aging process of the material, which helps to quickly evaluate the long-term stability and reliability of the material. Ensure the reliability of the test results.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high temperature oxidation corrosion testing system, comprising a heating furnace (1) and a frame (5) arranged below the heating furnace (1), characterized in that: The heating furnace (1) is provided with a corundum tube (2), one side of the heating furnace (1) is provided with a feeding mechanism (4) extending into the corundum tube (2), and one side of the heating furnace (1) is provided with a gas supply mechanism; An air supply pipe (2) connected to the corundum tube (2) is provided on one side of the heating furnace (1), and a platinum-rhodium air supply pipe (211) connected to the air supply mechanism is provided in the air supply pipe (2); The feeding mechanism (2) comprises a cantilever (41) slidably arranged in the corundum tube (2), a support frame (42) arranged on one side of the cantilever (41) for supporting materials, and a linear drive component (44) for controlling the movement of the cantilever (41), wherein one side of the corundum tube (2) passes through the heating furnace (1) and one side is provided with an opening for the cantilever (41) to enter and exit.

2. A high temperature oxidation corrosion testing system according to claim 1, characterized in that: The gas supply mechanism is provided with a water vapor generator (3), the water vapor generator (3) is provided with a gas outlet pipe (31) connected to the platinum-rhodium gas delivery pipe (211), and a heating belt (311) is sleeved on the outer side of the gas outlet pipe (31).

3. A high temperature oxidation corrosion testing system according to claim 2, characterized in that: The air outlet pipe (31) is provided with a stop valve (32), and the stop valve (32) is provided with a water discharge port.

4. A high temperature oxidation corrosion testing system according to claim 1, characterized in that: A plurality of corundum cushion columns (22) are provided at the lower end of the corundum tube (2).

5. A high temperature oxidation corrosion testing system according to claim 1, characterized in that: The linear drive assembly (44) comprises a sliding support plate (441) for fixing the cantilever (41) and a ball screw module (442) for driving the sliding support plate (441), wherein the ball screw module (442) is fixedly mounted on the frame (5).

6. A high temperature oxidation corrosion testing system according to claim 1, characterized in that: The support frame (42) is made of a plurality of silicon carbide rods, and a platinum-rhodium tube is sleeved on the outer side of the silicon carbide rods.

7. A high temperature oxidation corrosion testing system according to claim 1, characterized in that: A thermocouple (43) is slidably mounted in the cantilever (41) at a position corresponding to the placement of the material.

8. A high temperature oxidation corrosion testing system according to claim 1, characterized in that: A protective plate (411) is mounted on the cantilever (41), and a protective frame (11) is provided on one side of the heating furnace (1).

9. A high temperature oxidation corrosion testing system according to claim 1, characterized in that: A control component is provided in the frame (5), and an interaction component (51) electrically connected to the control component is provided on one side of the frame (5).

10. The method for using the high temperature oxidation corrosion testing system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Start the heating furnace (1) for preheating, place the prepared material on the support frame (42) for clamping, and move the thermocouple (43) so that it contacts the material; Step 2: Start the feeding mechanism (4) to feed the material into the corundum tube (2), start the heating furnace (1) to heat, and simultaneously start the steam generator (3) to introduce steam or a mixture of steam and argon into the corundum tube (2), heat to a specified test temperature, and then keep the temperature for a period of time; Step 3: Start the feeding mechanism (4) to move the material from the heating furnace (1) into the air, cool it down for a period of time, and then feed it into the corundum tube (2) to heat it again. Repeat this process several times to complete the high temperature oxidation corrosion test.

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