A device and method for in-situ observation of the counter-gravity solidification process of high melting point alloys

Abstract

The application provides a device and method for in-situ observation of high melting point alloy anti-gravity solidification process, which comprises a fixing mechanism in a frame structure, a melt tube mechanism comprising a quartz tube and a thermocouple arranged on the tube wall of the quartz tube, the interior of the upper part and the lower part of the quartz tube is provided with a first slot, and the interior of the middle part of the quartz tube is provided with a second slot; two movement mechanisms are respectively arranged symmetrically at the top end and the bottom end inside the frame structure, and each comprises a pressure sensor and a sleeve rod capable of being inserted into the quartz tube through movement along the Z-axis direction, and the upper surface of the sleeve rod at the bottom end is arranged to be capable of placing a block-shaped high temperature alloy to be observed; a heating mechanism is fixed to the melt tube mechanism and is used for heating the block-shaped high temperature alloy to be observed and controlling the heating temperature, and the heating mechanism comprises a temperature controller connected with the thermocouple. The device of the application can realize in-situ observation of the solidification behavior of high melting point alloy under anti-gravity casting conditions under the condition of a synchrotron radiation source.

Description

Technical Field

[0001] This invention relates to the field of anti-gravity solidification technology for high-melting-point alloy melts, specifically to an apparatus and method for in-situ observation of the solidification process of high-melting-point alloys under anti-gravity casting conditions. Background Technology

[0002] The antigravity solidification process of molten metal is an unavoidable and crucial step in the antigravity casting production of alloys. In-depth research on this process is essential for optimizing casting techniques and improving casting performance. However, due to the high temperature and opacity of molten alloys, researchers find it difficult to observe the antigravity solidification process in real time.

[0003] In recent years, the rapid development of synchrotron radiation technology has made it possible to observe the solidification behavior of alloy melts in situ, thereby understanding the solidification mechanism. However, current experimental setups for in-situ observation of alloy melt solidification processes based on synchrotron radiation are generally only applicable to low-melting-point alloys (such as aluminum / magnesium alloys) and cannot be applied to high-melting-point alloys (especially high-temperature alloys). Furthermore, in actual anti-gravity casting processes, pressure is a crucial process parameter; pressurization can refine grains, increase casting density, and improve casting quality. Especially during the filling and solidification of molten metal, the melt is usually subjected to a certain pressure, and during filling, the melt is not in a fixed state but is in a continuously flowing state under pressure. Therefore, to gain a deeper understanding of the anti-gravity solidification mechanism of high-melting-point alloy melts under pressure, designing and providing an experimental setup capable of using a synchrotron radiation source to observe the anti-gravity solidification process of high-temperature alloys under pressure in situ is a key problem that researchers in this field need to solve. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an apparatus and method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys.

[0005] According to one aspect of the present invention, an apparatus for in-situ observation of the antigravity solidification process of a high-melting-point alloy is provided, the apparatus comprising:

[0006] The fixing mechanism is a frame structure;

[0007] The melt tube mechanism includes a quartz tube and a thermocouple disposed on the wall of the quartz tube. The quartz tube is arranged along the height direction of the fixing mechanism and fixed inside the frame structure. The upper and lower parts of the quartz tube are provided with a first slot, and the middle part of the quartz tube is provided with a second slot. The first slot and the second slot are used to form a channel for high-temperature alloy melt.

[0008] Two motion mechanisms are symmetrically arranged at the top and bottom of the frame structure, respectively. Each motion mechanism includes a pressure sensor and a sleeve that can be inserted into the quartz tube by moving along the Z-axis. The upper surface of the sleeve at the bottom is configured to hold the block of high-temperature alloy to be observed. The pressure sensor is used to detect the pressure applied by the sleeve to the high-temperature alloy melt.

[0009] A heating mechanism, fixed to the melt tube mechanism, is used to heat the block-shaped high-temperature alloy to be observed and control the heating temperature. The heating mechanism includes a temperature controller, which is connected to the thermocouple.

[0010] Furthermore, the fixing mechanism has a symmetrical structure, including a vertically arranged fixing bracket. A first fixing platform is fixedly connected to the top of the fixing bracket, and a second fixing platform is fixedly connected to the bottom of the fixing bracket. The first fixing platform and the second fixing platform are located on the same side of the fixing bracket. A first fixing clamp and a second fixing clamp for fixing the quartz tube are provided between the first fixing platform and the second fixing platform. One end of the first fixing clamp and one end of the second fixing clamp are respectively fixedly connected to the side wall of the fixing bracket, and both ends of the quartz tube pass through the first fixing clamp and the second fixing clamp respectively.

[0011] Furthermore, the motion mechanism also includes a precision motor, a lifting platform, and a sleeve rod retainer; one end of the precision motor is fixed to the lower surface of the first fixed platform, and the other end of the precision motor is connected to one end of the lifting platform, and the precision motor is used to drive the lifting platform to move along the Z-axis direction; the sleeve rod retainer is fixedly connected to the other end of the lifting platform, and the sleeve rod is inserted into the sleeve rod retainer.

[0012] Furthermore, there are three thermocouples, namely a first thermocouple, a second thermocouple, and a third thermocouple, which are sequentially disposed on the wall of the quartz tube. The first thermocouple is located at the upper part of the center in the height direction of the quartz tube, the second thermocouple is located at the center in the height direction of the quartz tube, and the third thermocouple is located at the lower part of the center in the height direction of the quartz tube.

[0013] Furthermore, the first slot is a circular slot, and the second slot is a rectangular slot.

[0014] Furthermore, the thickness of the rectangular groove is less than 0.50 mm.

[0015] Furthermore, the quartz tube is made of high-purity alumina material with a purity of 99.7% or higher.

[0016] Furthermore, the heating mechanism also includes a heating coil, which is sleeved on the quartz tube, and the inner diameter of the heating coil is the same as the outer diameter of the quartz tube.

[0017] Furthermore, the heating coil is made of silicon molybdenum rod.

[0018] According to another aspect of the present invention, a method for in-situ observation of the anti-gravity solidification process of a high-melting-point alloy is provided, the method comprising:

[0019] The above-mentioned device for in-situ observation of the anti-gravity solidification process of high melting point alloys was placed on the beamline of the synchrotron radiation source, so that the light source radiated by the beamline could directly illuminate the middle part of the quartz tube.

[0020] The block of high-temperature alloy to be observed is placed on the upper surface of the sleeve rod of the motion mechanism at the bottom, and the block of high-temperature alloy to be observed is fed into the quartz tube by the movement of the sleeve rod.

[0021] The heating mechanism is used to heat the block-shaped high-temperature alloy to be observed, and the heating temperature is controlled.

[0022] The reading on the thermostat connected to the thermocouple is used to determine whether the heating temperature has reached the required level.

[0023] Once the heating temperature reaches the required level, the high-temperature alloy melt is pressurized by the sleeves at the bottom and top. The pressure values ​​applied by the sleeves are monitored in real time by the pressure sensors at the bottom and top. The high-temperature alloy melt is pushed upward against gravity according to the required pressure value.

[0024] The high-temperature alloy melt is cooled and its temperature is controlled by a heating mechanism, allowing it to gradually cool under the irradiation of a synchrotron radiation source. Experimental signals are collected by a detector.

[0025] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0026] 1. This invention, through the cooperation of the motion mechanism, the melt tube mechanism and the heating mechanism, can realize the melting of high melting point alloys and the observation of melt flow and anti-gravity solidification process under pressure. The technology is simple to implement and more in line with actual production conditions.

[0027] 2. This invention can be applied to synchrotron radiation sources. Using the device of this invention, the antigravity solidification behavior of high melting point alloy melts under pressure can be observed in situ under synchrotron radiation source conditions.

[0028] 3. The entire device of this invention can achieve extremely high operating temperatures and is applicable to low, medium and high melting point alloys, making it highly versatile. Attached Figure Description

[0029] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the device for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the fixing mechanism according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the motion mechanism according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the melt tube mechanism according to an embodiment of the present invention;

[0034] In the diagram: 100 is the fixing mechanism, 110 is the fixing bracket, 120 is the first fixing platform, 130 is the first fixing clamp, 140 is the second fixing clamp, 150 is the second fixing platform, 200 is the motion mechanism, 210 is the precision motor, 220 is the lifting platform, 230 is the sleeve rod fixer, 240 is the sleeve rod, 300 is the melt tube mechanism, 310 is the quartz tube, 320 is the first thermocouple, 330 is the second thermocouple, 340 is the third thermocouple, and 400 is the heating mechanism. Detailed Implementation

[0035] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention. In the description of the embodiments of the present invention, it should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in orders other than those illustrated or described herein.

[0036] Reference Figure 1This is a schematic diagram of a device for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to an embodiment of the present invention. The device includes: a fixing mechanism 100, which is a frame structure; and a melt tube mechanism 300, including a quartz tube 310 and a thermocouple disposed on the wall of the quartz tube 310. The quartz tube 310 is arranged along the height direction of the fixing mechanism 100 and fixed inside the frame structure. The quartz tube 310 includes an upper part, a middle part, and a lower part in sequence along the height direction. The upper part and the lower part of the quartz tube 310 are each provided with a first slot, and the middle part of the quartz tube 310 is provided with a second slot, which communicates with the first slot. The first and second slots are used to form channels for the high-temperature alloy melt. During in-situ observation, the synchrotron radiation source is always aligned with the center part of the quartz tube 310. The molten gold is pushed through the first slot in the lower part, then through the second slot in the middle part, and finally through the first slot in the upper part. Two motion mechanisms 200 are symmetrically arranged at the top and bottom of the frame structure. The motion mechanism 200 includes a pressure sensor and a sleeve 240 that can be inserted into the quartz tube 310 by moving along the Z-axis direction. The Z-axis direction refers to the longitudinal direction of the quartz tube 310 in the figure. The upper surface of the sleeve 240 at the bottom end, that is, the end near the quartz tube 310, is set to place the block of high-temperature alloy to be observed. The pressure sensor is used to detect the pressure applied by the sleeve 240 to the high-temperature alloy melt. The heating mechanism 400 is fixed on the melt tube mechanism 300 and is used to heat the block of high-temperature alloy to be observed and control the heating temperature. The heating mechanism 400 includes a temperature controller, which is connected to a thermocouple.

[0037] The embodiments of the present invention, through the cooperation of the motion mechanism 200, the melt tube mechanism 300 and the heating mechanism 400, can realize the melting of high melting point alloys and the observation of the melt flow process. The device can be used in conjunction with synchrotron radiation technology to realize in-situ observation of the anti-gravity solidification process of the flowing melt of high temperature alloys under pressure.

[0038] Reference Figure 2In some specific embodiments, the fixing mechanism 100 has a symmetrical structure, including a vertically arranged fixing bracket 110. Specifically, the fixing bracket 110 has a plate-like structure. A first fixing platform 120 is fixedly connected to the top of the fixing bracket 110, and a second fixing platform 150 is fixedly connected to the bottom of the fixing bracket 110. The first fixing platform 120 and the second fixing platform 150 are located on the same side of the fixing bracket 110. A first fixing clamp 130 and a second fixing clamp 140 for fixing the quartz tube 310 are provided between the first fixing platform 120 and the second fixing platform 150. 0. The second fixing clamp 140, the first fixing platform 120, and the second fixing platform 150 are all located on the same side of the fixing bracket 110. The fixing platforms are symmetrical vertically, and the fixing clamps are also symmetrical vertically. One end of the first fixing clamp 130 and one end of the second fixing clamp 140 are respectively fixedly connected to the side wall of the fixing bracket 110. Both ends of the quartz tube 310 pass through the first fixing clamp 130 and the second fixing clamp 140 respectively. Specifically, the first fixing clamp 130 and the second fixing clamp 140 can be fixedly connected to the quartz tube 310 by bolts. Of course, in some other embodiments, the first fixing clamp 130 and the second fixing clamp 140 can also be connected to the quartz tube 310 in other ways, as long as the same function as in the embodiments of the present invention can be achieved. The embodiments of the present invention do not specifically limit this.

[0039] Reference Figure 3 In some specific embodiments, the motion mechanism 200 further includes a precision motor 210, a lifting platform 220, and a sleeve rod retainer 230. One end of the precision motor 210 is fixed to the lower surface of the first fixed platform 120, and the other end of the precision motor 210 is connected to one end of the lifting platform 220. The precision motor 210 drives the lifting platform 220 to move along the Z-axis. The sleeve rod retainer 230 is fixedly connected to the other end of the lifting platform 220 by bolts, or by other means. The sleeve rod 240 is inserted into the sleeve rod retainer 230. The operation of the precision motor 210 enables the lifting platform 220 to move stably and accurately along the Z-axis. The movement of the lifting platform 220, in turn, drives the sleeve rod 240, allowing the sleeve rod 240 to be stably and accurately inserted into the quartz tube 310. By using the motion mechanism 200 at the bottom to uniformly push the high-temperature alloy melt upward against gravity at different speeds, the effect of the melt flow velocity on solidification can be observed. By coordinating the motion mechanisms 200 at the top and bottom, the effect of the movement of the high-temperature alloy melt under different pressures on solidification can be observed.

[0040] Reference Figure 4In some specific embodiments, three thermocouples are used: a first thermocouple 320, a second thermocouple 330, and a third thermocouple 340, sequentially disposed on the wall of the quartz tube 310. The first thermocouple 320 is located slightly above the center of the quartz tube 310 in the height direction, the second thermocouple 330 is located at the center of the quartz tube 310 in the height direction, and the third thermocouple 340 is located slightly below the center of the quartz tube 310 in the height direction. Circular holes are provided at the center, slightly above the center, and slightly below the center of the quartz tube 310 for placing the thermocouples to measure temperature. Through these three temperature measuring positions, the melt temperature at the observed location can be precisely controlled. Of course, in other embodiments, other numbers of thermocouples can be used, as long as the same function as in the embodiments of the present invention can be achieved.

[0041] The two first slots at the top and bottom and the second slot in the middle of the quartz tube 310 serve as channels for the high-temperature alloy melt. To meet the needs of synchrotron radiation experiments, in some specific embodiments, the first slot is a circular hole and the second slot is a rectangular slot. Of course, in other embodiments, the first and second slots can also be other shapes, as long as they can achieve the same function as in the embodiments of the present invention. The embodiments of the present invention do not specifically limit this. The rectangular slot is essentially a cuboid slot with thickness in three dimensions. Since the irradiation part of the synchrotron radiation source is at the center of the quartz tube 310, in order to meet the transmittance of the synchrotron radiation source, the thickness of the central rectangular slot of the quartz tube 310 is extremely small. Preferably, the thickness of the rectangular slot, i.e., the distance between one side surface and the opposite side surface of the rectangular slot, is less than 0.50 mm.

[0042] To meet extremely high operating temperatures, in some specific implementations, the quartz tube 310 is made entirely of high-purity alumina material with a purity of over 99.7%, which can meet operating temperatures up to 1600℃ and is applicable to low, medium, and high melting point alloys, making it highly versatile.

[0043] Continue to refer to Figure 1In some specific embodiments, the heating mechanism 400 further includes a heating coil and a temperature controller. The heating coil is fitted onto the quartz tube 310, and the inner diameter of the heating coil is the same as the outer diameter of the quartz tube 310, so that the heating coil can be directly fitted onto the quartz tube 310 for heating, which is simple and convenient. Thermocouples detect the temperature during the heating process of the observed bulk high-temperature alloy and the cooling process of the melt. The temperature measured by the thermocouples is fed back to the heating behavior of the heating coil, realizing a closed-loop feedback between the heating coil, thermocouple, and temperature controller. In order to meet the ultra-high temperature required for melting the high-temperature alloy, in some preferred embodiments, the heating coil is made of silicon molybdenum rod, and the heating temperature can reach up to 1800°C. The heating temperature of the melt can be accurately controlled by the temperature controller and the three thermocouples on the quartz tube 310.

[0044] This invention, through the coordinated operation of the motion mechanism 200, the melt tube mechanism 300, and the heating mechanism 400, enables the observation of the melting and flow process of high-melting-point alloys under pressure. The technology is simple to implement and better suits actual production conditions. This invention is applicable to synchrotron radiation sources. Using the device of this invention, the anti-gravity solidification behavior of high-melting-point alloy melts under pressure can be observed in situ under synchrotron radiation source conditions. Furthermore, the entire device can achieve a stable operating temperature (1600℃) and is applicable to low, medium, and high-melting-point alloys, demonstrating strong versatility.

[0045] Another embodiment of the present invention provides a method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys, the method comprising:

[0046] S1. Place the device for in-situ observation of the anti-gravity solidification process of high melting point alloy in the above embodiment on the beamline of the synchrotron radiation source, so that the light source radiated by the beamline can directly illuminate the middle part of the quartz tube.

[0047] S2. Place the block of high-temperature alloy to be observed on the upper surface of the sleeve rod of the motion mechanism at the bottom, and send the block of high-temperature alloy to be observed into the quartz tube by the movement of the sleeve rod;

[0048] S3. Use a heating mechanism to heat the block-shaped high-temperature alloy to be observed and control the heating temperature;

[0049] S4. Determine whether the heating temperature has reached the required level by checking the reading on the thermostat connected to the thermocouple;

[0050] S5. Once the required heating temperature is reached, the high-temperature alloy melt is pressurized by the bottom and top sleeves. Pressure sensors on the bottom and top motion mechanisms monitor the applied pressure in real time, pushing the high-temperature alloy melt upwards against gravity according to the required pressure value. Specifically, the bottom pressure sensor detects the pressure applied by the bottom sleeve, while the top pressure sensor detects the pressure applied by the top sleeve, ensuring that the pressure difference between the bottom and top of the high-temperature alloy melt meets the preset pressure value. For example, if the pressure applied by the bottom sleeve is P1 and the pressure applied by the top sleeve is P2, where P1 > P2, the melt experiences a pressure of P = (P1 - P2), moving upwards against gravity. Closed-loop feedback is achieved through the pressure sensors and a precision motor.

[0051] S6. The high-temperature alloy melt is cooled and its temperature controlled by a heating mechanism, allowing it to gradually cool under synchrotron radiation. Experimental signals are collected using different detectors. Specifically, an imaging detector can be used to collect the transmission signals from the high-energy synchrotron radiation source. Processing these signals allows for imaging observation of the anti-gravity solidification process, including the observation of dendrite growth. A diffraction signal detector can also be used to collect diffraction signals from the high-energy synchrotron radiation source, enabling real-time analysis of phase precipitation and phase transformation during anti-gravity solidification.

[0052] In some specific embodiments, the method includes: first, placing the device from the above embodiments above a beamline of a synchrotron radiation source, so that the light emitted by the beamline can directly illuminate the middle part of the quartz tube. The block of high-temperature alloy to be observed is placed on the upper surface of the sleeve rod of the bottom moving mechanism. It should be noted that because the high-temperature alloy block is pushed into the quartz tube by the sleeve rod, the high-temperature alloy block will melt inside the quartz tube. The size of the first slotted circular hole at the bottom of the quartz tube is the same as the size of the sleeve rod. If the size of the high-temperature alloy block exceeds the surface size of the sleeve rod, it will be impossible to push the high-temperature alloy block into the quartz tube by the sleeve rod. Therefore, the size of the block of high-temperature alloy to be tested cannot exceed the surface size of the sleeve rod. The sleeve rod is positioned directly opposite the circular slot at the bottom of the quartz tube. A precision motor drives the sleeve rod to slowly feed the high-temperature alloy to be tested into the quartz tube and rise to a suitable position. The movement speed and distance of the sleeve rod are accurately controlled by computer software. The power is turned on to heat the heating coil of the heating mechanism, and the heating temperature is controlled by a temperature controller. The reading on the thermocouple-connected temperature controller is used to determine whether the heating temperature has reached the experimental requirements. Once the required temperature is reached, the precision motor is restarted. The precision motor continues to drive the sleeve to pressurize the melt, and the pressure sensor monitors the pressure applied by the sleeve in real time, pushing the high-temperature alloy melt to flow in a specified direction at the required pressure. The temperature controller of the heating mechanism is used to control the cooling, allowing the melt to gradually cool under the irradiation of the synchrotron radiation source. Experimental signals are collected by different detectors, and the experiment is completed.

[0053] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention. The above preferred features can be used in any combination without conflict.

Claims

1. A method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys, characterized in that, This is achieved using an in-situ observation device for the anti-gravity solidification process of high-melting-point alloys. The device includes: The fixing mechanism is a frame structure; The melt tube mechanism includes a quartz tube and a thermocouple disposed on the tube wall of the quartz tube. The quartz tube is arranged along the height direction of the fixing mechanism and fixed inside the frame structure. The upper and lower parts of the quartz tube are provided with a first slot, and the middle part of the quartz tube is provided with a second slot. The first slot and the second slot are used to form a channel for high-temperature alloy melt. Two motion mechanisms are symmetrically arranged at the top and bottom of the frame structure, respectively. Each motion mechanism includes a pressure sensor and a sleeve that can be inserted into the quartz tube by moving along the Z-axis. The upper surface of the sleeve at the bottom is configured to hold the block of high-temperature alloy to be observed. The pressure sensor is used to detect the pressure applied by the sleeve to the high-temperature alloy melt. A heating mechanism, fixed to the melt tube mechanism, is used to heat the block-shaped high-temperature alloy to be observed and control the heating temperature. The heating mechanism includes a temperature controller, which is connected to the thermocouple. The method includes: The device for in-situ observation of the anti-gravity solidification process of high-melting-point alloys was placed above the beamline of the synchrotron radiation source, so that the light source radiated by the beamline could directly illuminate the middle part of the quartz tube. The block of high-temperature alloy to be observed is placed on the upper surface of the sleeve rod of the motion mechanism at the bottom, and the block of high-temperature alloy to be observed is fed into the quartz tube by the movement of the sleeve rod. The heating mechanism is used to heat the block-shaped high-temperature alloy to be observed, and the heating temperature is controlled. The reading on the thermostat connected to the thermocouple is used to determine whether the heating temperature has reached the required level. Once the heating temperature reaches the required level, the high-temperature alloy melt is pressurized by the sleeves at the bottom and top. The pressure values ​​applied by the sleeves are monitored in real time by the pressure sensors at the bottom and top. The high-temperature alloy melt is pushed upward against gravity according to the required pressure value. The high-temperature alloy melt is cooled and its temperature is controlled by a heating mechanism, allowing it to gradually cool under the irradiation of a synchrotron radiation source. Experimental signals are collected by a detector.

2. The method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to claim 1, characterized in that, The fixing mechanism is a symmetrical structure, including a vertically arranged fixing bracket. A first fixing platform is fixedly connected to the top of the fixing bracket, and a second fixing platform is fixedly connected to the bottom of the fixing bracket. The first fixing platform and the second fixing platform are located on the same side of the fixing bracket. A first fixing clamp and a second fixing clamp are provided between the first fixing platform and the second fixing platform for fixing the quartz tube. One end of the first fixing clamp and one end of the second fixing clamp are respectively fixedly connected to the side wall of the fixing bracket. The two ends of the quartz tube pass through the first fixing clamp and the second fixing clamp respectively.

3. The method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to claim 2, characterized in that, The motion mechanism also includes a precision motor, a lifting platform, and a sleeve retainer; One end of the precision motor is fixed to the lower surface of the first fixed platform, and the other end of the precision motor is connected to one end of the lifting platform. The precision motor is used to drive the lifting platform to move along the Z-axis. The sleeve rod fixing device is fixedly connected to the other end of the lifting platform, and the sleeve rod is inserted into the sleeve rod fixing device.

4. The method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to claim 1, characterized in that, The number of thermocouples is three, namely a first thermocouple, a second thermocouple, and a third thermocouple, which are sequentially disposed on the tube wall of the quartz tube. The first thermocouple is located at the upper part of the center in the height direction of the quartz tube, the second thermocouple is located at the center in the height direction of the quartz tube, and the third thermocouple is located at the lower part of the center in the height direction of the quartz tube.

5. The method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to claim 1, characterized in that, The first slot is a circular slot, and the second slot is a rectangular slot.

6. The method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to claim 5, characterized in that, The thickness of the rectangular groove is less than 0.50 mm.

7. The method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to claim 1, characterized in that, The quartz tube is made of high-purity alumina material with a purity of over 99.7%.

8. The method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to claim 1, characterized in that, The heating mechanism further includes a heating coil, which is sleeved on the quartz tube, and the inner diameter of the heating coil is the same as the outer diameter of the quartz tube.

9. The method for in-situ observation of the anti-gravity solidification process of high-melting-point alloys according to claim 8, characterized in that, The heating coil is made of silicon molybdenum rod.

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