CN111500826A - An experimental device for high-throughput heat treatment of superalloys - Google Patents

Abstract

The present application discloses an experimental device for high-throughput heat treatment of high-temperature alloys, comprising a casing and an infrared heating rod installed at the center of the casing, wherein a plurality of rotatable and uniformly distributed infrared heating rods are installed in the casing. There are two lower rotating disks, and a quartz tube is installed at the center of rotation of each lower rotating disk; a refractory fiber block is installed on the lower rotating disk, and an elliptical gold surface reflector is inlaid on the elliptical surface of the refractory fiber block. The quartz tube is located at the focal point of the ellipse gold surface reflector, and receives the direct radiation of the infrared heating rod and the infrared rays reflected by the ellipse gold surface reflector to heat the sample in the quartz tube; each quartz tube is connected separately There is a cooling system to cool the sample in the quartz tube. The application is provided with a plurality of heat treatment stations, and the process parameters of the heat treatment of each station can be adjusted according to the requirements, so as to realize the preparation of high-throughput samples, and provide the possibility for the rapid realization of orthogonal experiments and gradient experiments.

Description

An experimental device for high-throughput heat treatment of superalloys

technical field

The present application relates to the technical field of superalloy heating furnaces, in particular to an experimental device for high-flux heat treatment of superalloys.

Background technique

Superalloy refers to a class of metal materials based on iron, nickel and cobalt, which can work for a long time at a high temperature above 600 ° C and under certain stress; and has high high temperature strength, good oxidation resistance and corrosion resistance, Good fatigue properties, fracture toughness and other comprehensive properties. The superalloy is a single austenite structure, which has good structure stability and service reliability at various temperatures.

The heat treatment temperature of superalloys is high, the time is long, and the heat treatment process is complicated. In order to ensure the surface quality, the heat treatment experiments of superalloys generally need to be carried out in a vacuum environment of a tube furnace. These factors limit the development of new heat treatment processes for superalloys, resulting in heat treatment. The process development process is long.

The existing superalloy experimental tube furnace is designed with a single quartz tube. If multiple samples need to be tested at the same time, they need to be stacked or placed in a quartz tube. Due to the limited temperature uniformity area of the tube furnace and the placement of the samples, Multiple samples cannot be processed at the same time, and there are certain temperature differences in the heat treatment of each sample due to uniformity issues.

At the same time, due to the complex heat treatment process of superalloys, it is necessary to study the effects of heating rate, cooling rate, solution temperature and time, aging temperature and time, and vacuum degree on the service performance of superalloys to optimize the heat treatment process of superalloys. The tube furnace can only process samples of the same process, and high-throughput experiments of different processes cannot be carried out, which also prolongs the development cycle of superalloy heat treatment.

In the prior art, there are few reports on heat treatment experimental equipment dedicated to superalloys, and the workstations of the heating equipment are also very limited, which cannot really meet the needs of heat treatment samples of superalloys.

SUMMARY OF THE INVENTION

Based on the above deficiencies in the prior art, the technical problem to be solved by this application is to provide a high-throughput heat treatment experimental device for superalloys, which is provided with a plurality of heat treatment stations, and the process parameters of the heat treatment of each station can be adjusted according to requirements, so as to realize High-throughput sample preparation makes it possible to quickly realize orthogonal experiments and gradient experiments.

The present application provides an experimental device for high-throughput heat treatment of superalloys, including a casing and an infrared heating rod installed at the center of the casing, wherein a plurality of rotatable and uniformly distributed infrared heating rods are installed in the casing. There are two lower rotating disks, and a quartz tube is installed at the rotation center of each lower rotating disk; a refractory fiber block is installed on the lower rotating disk, and an elliptical gold surface reflector is inlaid on the elliptical surface of the refractory fiber block. The quartz tube is located at the focal point of the ellipse gold surface reflector, and receives the direct radiation of the infrared heating rod and the infrared rays reflected by the ellipse gold surface reflector to heat the sample in the quartz tube; each quartz tube is connected separately There is a cooling system to cool the sample in the quartz tube.

Further, the cooling system includes an air inlet connected to the lower end face of the quartz tube, and an air outlet connected to the upper end face of the quartz tube; the air inlet and the air outlet are respectively equipped with air inlets. Solenoid valve and exhaust solenoid valve are used to control the flow of cooling gas into and out of the quartz tube.

Further, the upper part of the casing is provided with a cover that is moved up and down by the lifting column, and the cover is provided with an upper rotating disk corresponding to the lower rotating disk one-to-one and rotating synchronously with the lower rotating disk. An upper support sealing ring for fixing and sealing the upper end face of the quartz tube is arranged at the rotational center position of the upper rotary disc; the exhaust port is installed on the upper rotary disc at a position corresponding to the upper end face of the quartz tube.

Furthermore, each lower rotating disk is provided with a lower supporting sealing ring for fixing and sealing the lower end surface of the quartz tube; the air inlet is installed on the lower rotating disk at a position corresponding to the lower end surface of the quartz tube.

Optionally, an observation window corresponding to the refractory fiber block is opened on the outer shell, and the observation window is opened and closed by an observation baffle; in the cooling stage, the lower rotating disk rotates to make the elliptical gold surface The reflector is facing the direction of the observation window to block the thermal radiation of the sample in the quartz tube.

Further, the quartz tube is provided with a thermocouple for measuring the temperature of the sample.

Optionally, the number of the lower rotating discs is 6, and the refractory fiber blocks, the oval gold-faced reflector, and the quartz tube are arranged in a regular hexagon.

Optionally, the outer shell is circular and fixed on the base, and the lower rotary disk is rotatably connected to the base.

From the above, the experimental device for high-throughput heat treatment of superalloys of the present invention has at least the following beneficial effects:

1. The six elliptical reflection devices are arranged in a regular hexagon. The infrared emission device is set at the confocal point of the six elliptical reflection devices. The quartz tube where the sample is placed is located at the focus of each elliptical gold surface reflector to ensure that the quartz tube can receive direct and The infrared rays reflected by the ellipsoid heat the sample inside the tube. The elliptical surface is designed to be evenly distributed around the circumference, with high thermal efficiency. When the focus of the elliptical gold surface reflector is facing the infrared emitting device in the center, it can ensure that the six stations receive the same infrared intensity and ensure that each station has the same heating conditions.

2. The elliptical reflector is designed to be rotatable, and the elliptical gold-faced reflector is embedded on the refractory fiber block. By calculating and adjusting the rotation angle, the sample heating rate, holding temperature and time can be controlled, and the individual heat treatment processes of samples at different stations can be realized. control, and will not affect other station processes.

3. The quartz tube of each sample is separately provided with an air inlet and an exhaust port, and the flow of gas in and out is controlled by a solenoid valve. The cooling rate, vacuum degree and other conditions of each sample can be individually controlled, and it will not cause any problems in other station processes. influences.

4. Multiple samples can be processed at the same time, and the infrared reflectivity and heating efficiency can be improved through the elliptical gold surface reflector, and the temperature uniformity is good.

5. It can carry out heat treatment experiments of multiple groups of different processes at one time. It has the characteristics of large amount of experiments at one time, high thermal efficiency, small footprint, simple operation, high efficiency, and easy control of parameter variables.

6. The superalloy high-throughput heat treatment experimental device of the present application does not control the power of the heating rod, but adjusts the heating and heat preservation process of the sample through the rotation angle of the reflection module, which is more flexible and controllable.

Description of drawings

Fig. 1 is the structural representation of the high-throughput heat treatment experimental device of superalloy provided by the application;

FIG. 2 is a schematic diagram of the heating principle of the experimental apparatus for high-flux heat treatment of superalloys of the present application.

Reference symbols: 1-lifting column; 2-ellipse gold-faced reflector; 3-refractory fiber block; 4-infrared heating rod; 5-cover; 6-exhaust port; 7-upper support sealing ring; 8-quartz Tube; 9-observation window; 10-observation baffle; 11-lower rotating disk; 12-air inlet; 13-lower bearing sealing ring; 14-shell; 15-base; 16-upper rotating disk.

Detailed ways

The present application will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

The experimental device for high-throughput heat treatment of superalloys of the present application includes a base 15, a casing 14 located on the base 15, and an infrared heating rod 4 mounted on the base 15 and placed at the center of the casing 14. The base 15 is rotatably mounted with a Six lower rotating disks 11, the six lower rotating disks 11 are evenly arranged around the circumference of the infrared heating rod 4 and are distributed in a regular hexagon, each lower rotating disk 11 is installed with a refractory fiber block 3, and an elliptical gold surface reflector 2 is installed On the elliptical surface of the refractory fiber block 3, a quartz tube 8 is arranged on the lower rotary disk 11 near the focal point of the refractory fiber block 3. Each rotation of the lower rotary disk 11 can make the elliptical gold surface reflector 2 face the infrared heating rod 4. , so that the quartz tube 8 is in the heating station, the quartz tube 8 receives the direct radiation of the infrared heating rod 4 and the infrared rays reflected by the elliptical gold surface reflector 2, and the sample in the quartz tube 8 is heated. It is ensured that the six heating stations receive the same infrared intensity, ensure that each station has the same heating conditions, and has high thermal efficiency.

The lower end face of the quartz tube 8 is fixed by the lower support sealing ring 13 located on the lower rotating disk 11. The quartz tube 8 is provided with a thermocouple for measuring the temperature of the sample, which can monitor the temperature of the experimental sample in real time. In addition, the lower end surface of the quartz tube 8 is connected to an air inlet 12 installed on the lower rotary disk 11, and an air inlet solenoid valve (not shown in the figure) is installed on the air inlet 12.

A cover 5 is provided above the outer casing 14 , the height and rotation angle of the cover 5 are controlled by the lifting column 1 , and there are six groups of exhaust gas distributed in a regular hexagon and corresponding to the position of the quartz tube 8 on the cover 5 Port 6, exhaust solenoid valve (not shown in the figure), upper support sealing ring 7, upper rotary disk 16. When the device is in a sealed state, the upper end face of the quartz tube 8 is connected to the exhaust port 6 installed on the upper rotary disk 16, and is fixed and sealed by the upper support sealing ring 7. Valves (intake solenoid valve and exhaust solenoid valve) control. The air inlet 12 , the air inlet solenoid valve, the air outlet 6 , and the air discharge solenoid valve constitute a cooling system, which can individually cool the samples in each quartz tube 8 . The air inlet 12 and the exhaust port 6 of the present invention are used as the connection ports with the external pipeline and the solenoid valve. Tube 8 is sealed.

In the sealed state, the rotation centers of the upper rotating disk 16 and the lower rotating disk 11 coincide with the axis of the quartz tube 8, so that the elliptical gold-faced reflector 2 and the refractory fiber block 3 can be rotated 360° around the axis of the quartz tube 8, which can be adjusted by adjusting Different rotation angles can achieve precise control of sample heating rate and heating temperature. When cooling the sample, the elliptical gold-faced reflector 2 is rotated in the direction facing the observation window 9 on the housing 14 to block the thermal radiation received by the sample.

An observation window 9 is opened on the outer casing 14 at the position corresponding to each quartz tube 8, which is used to observe the state of the sample in the cooling stage. In order to avoid infrared harm to personnel. Each lower rotating disk 11 can be rotated so that the elliptical gold-faced reflector 2 faces the direction of the observation window 9, so that the quartz tube 8 is in the cooling position to prevent the sample from being radiated by heat. When the sample is in the cooling state, the observation baffle 10 can When it is turned on, the state of the sample can be observed through the observation window 9.

Below, with reference to Figures 1 and 2 and in conjunction with the description of the above-mentioned structural features, the working principle of the experimental device for high-flux heat treatment of superalloys of the present application will be introduced:

According to the requirements, the high temperature alloy experimental sample that needs to be heat treated is connected to the thermocouple and placed in the quartz tube 8 , and the quartz tube 8 is inserted into the lower support sealing ring 13 . The lifting column 1 adjusts the horizontal position of the cover 5 so that the upper support sealing ring 7 corresponds to the position of the quartz tube 8 . The lifting column 1 controls the cover 5 to descend, and the upper end face of the quartz tube 8 is inserted into the upper support sealing ring 7 to confirm that the device is completely sealed at this time, and open the solenoid valve (exhaust solenoid valve) at the exhaust outlet end, so that the exhaust pipe and the The quartz tube 8 is in a negative pressure state.

The heat treatment process of the station sample is set by the program. During the experiment, according to the process curve set by the program, the infrared heating rod 4 is turned on to heat the sample in the heating stage. The principle is shown in Figure 2. Speed and holding temperature adjust the rotation angle. When a certain station enters the cooling stage, the elliptical gold-faced reflector 2 rotates in the direction facing the observation window 9 to block the thermal radiation received by the sample, the intake solenoid valve is opened, and the flow of the cooling medium is controlled to achieve the cooling rate. For precise control, the observation baffle 10 can be opened at this time, and the experimenter can observe the state of the sample through the observation window 9 . If there is still a subsequent heating process, the observation baffle 10 is closed, and the oval gold-surfaced reflector 2 is rotated to an appropriate angle to heat the sample.

For example, after the heat treatment process of a sample at a certain station is completed, the elliptical gold surface reflector 2 is rotated to the direction facing the observation window 9 and is on standby. When all samples are tested, turn off the infrared heating rod 4. After the device is cooled, turn off the Air solenoid valve, the air intake solenoid valve controls the internal atmospheric pressure of the quartz tube 8 to be equal to the outside, and closes the air intake solenoid valve. The lifting column 1 controls the cover 5 to move upward. When the moving distance is greater than the height of the upper support seal 7, the cover 5 is moved horizontally, the quartz tube 8 is removed from the lower support seal 13, and the internal experimental sample is taken out.

During the experiment, the sample temperature data was collected in real time through the thermocouple and fed back to the control program to ensure that the experiment was carried out according to the set process.

It can be seen from the technical solutions of the above embodiments of the present invention that the present invention is a multi-station device suitable for heat treatment experiments of superalloys. Compared with the prior art, the present invention can perform heat treatment experiments of multiple groups of different processes at one time , has the characteristics of a large amount of one-time experiments and high thermal efficiency. And it has the advantages of small footprint, simple operation, high efficiency, and easy control of parameter variables.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (8)

1. A high-flux thermal treatment experimental device for high-temperature alloy comprises a shell (14) and an infrared heating rod (4) installed at the central position of the shell (14), and is characterized in that:

a plurality of lower rotary tables (11) which are uniformly distributed around the circumference of the infrared heating rod (4) are rotatably arranged in the shell (14), and a quartz tube (8) is arranged at the rotating center of each lower rotary table (11);

the lower rotary table (11) is provided with a refractory fiber block (3), an elliptical gold surface reflecting cover (2) is embedded in the elliptical surface of the refractory fiber block (3), the quartz tube (8) is located at the focus of the elliptical gold surface reflecting cover (2) and receives direct radiation of the infrared heating rod (4) and infrared rays reflected by the elliptical gold surface reflecting cover (2) to heat a sample in the quartz tube (8);

each quartz tube (8) is independently connected with a cooling system for cooling the sample in the quartz tube (8).

2. The high-heat-treatment experimental device for high-temperature alloy according to claim 1, wherein the cooling system comprises an air inlet (12) connected with the lower end face of the quartz tube (8), and an air outlet (6) connected with the upper end face of the quartz tube (8);

and the air inlet (12) and the air outlet (6) are respectively provided with an air inlet electromagnetic valve and an air outlet electromagnetic valve which are used for controlling the flow of cooling gas entering and discharging the quartz tube (8).

3. The experimental device for high-flux thermal treatment of high-temperature alloy according to claim 2, wherein a cover (5) which moves up and down through a lifting column (1) is arranged above the housing (14), upper rotating discs (16) which correspond to the lower rotating discs (11) one by one and rotate synchronously with the lower rotating discs (11) are arranged on the cover (5), and an upper supporting sealing ring (7) for fixing and sealing the upper end surface of the quartz tube (8) is arranged at the rotation center position of each upper rotating disc (16);

the exhaust port (6) is arranged on the upper rotating disc (16) at a position corresponding to the upper end face of the quartz tube (8).

4. The experimental device for high-temperature alloy heat treatment in high flux according to claim 2 or 3, wherein each lower rotary table (11) is provided with a lower supporting sealing ring (13) for fixing and sealing the lower end face of the quartz tube (8);

the air inlet (12) is arranged on the lower rotating disc (11) at a position corresponding to the lower end face of the quartz tube (8).

5. The experimental device for high-flux heat treatment of the high-temperature alloy according to claim 1, wherein the housing (14) is provided with observation windows (9) corresponding to the refractory fiber blocks (3) in a one-to-one manner, and the observation windows (9) are opened and closed by observation baffles (10);

in the cooling stage, the lower rotating disc (11) rotates to enable the elliptical gold surface reflection cover (2) to face the direction of the observation window (9), and the heat radiation of the sample in the quartz tube (8) is blocked.

6. The experimental device for high-flux thermal treatment of high-temperature alloy according to claim 1, wherein a thermocouple for measuring the temperature of the sample is arranged in the quartz tube (8).

7. The experimental device for high-throughput thermal treatment of high-temperature alloy according to claim 1 or 3, wherein the number of the lower rotary table (11) is 6, and the refractory fiber block (3), the elliptical gold-faced reflecting cover (2) and the quartz tube (8) are arranged in a regular hexagon.

8. The experimental apparatus for high heat treatment of high temperature alloy according to claim 1, wherein the housing (14) is circular and fixed on a base (15), and the lower rotary table (11) is rotatably connected to the base (15).

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