Foamed ceramic net fixing device for powder high-temperature alloy atomization pouring

Abstract

The invention relates to a foamed ceramic net fixing device for powder high-temperature alloy atomization pouring, which comprises a tundish and a forming assembly, a fixing assembly is arranged in the tundish, a hole is formed in the back surface of the tundish, and cylindrical clamping grooves are formed in the top and the bottom of the inner wall of the tundish; and the forming assembly comprises an outer mold, an inner mold is arranged in the outer mold, a wedge-shaped groove is formed in the outer surface of the inner mold, a cylindrical clamping groove mold is fixedly installed in the wedge-shaped groove, and a strong magnet is arranged in the inner mold. The foamed ceramic filter screen shifts in the hollow areas of the first semicircular sleeve box and the second semicircular sleeve box, so that an arched semicircular space is formed between the upper top surfaces of the interiors of the first semicircular sleeve box and the second semicircular sleeve box and the foamed ceramic filter screen; and two arc wedge blocks are symmetrically plugged in the space to downwards press the foamed ceramic filter screen, so that the foamed ceramic filter screen cannot move in the soaking process of molten steel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder metallurgy, in particular to a foam ceramic net fixing device for powder high-temperature alloy atomization pouring. BACKGROUND

[0002] The high-temperature alloy powder is prepared by gas atomization method, and the principle is that the high-temperature alloy master alloy is heated to a certain superheat degree of the metal liquid under vacuum by electromagnetic induction, continuously poured into the tundish, and then the metal liquid is atomized into a certain particle size of metal powder by using high-pressure inert gas argon through the flow guide pipe at the bottom of the tundish.

[0003] During the production of high-temperature alloy powder, the foam ceramic filter net plays a role in filtering and adsorbing impurities in the metal liquid, and is installed in the tundish, which plays a key role in the purity of the powder. Because the foam ceramic filter net is repeatedly impacted by the metal liquid flow and has a lower density than the metal liquid, the filter net will float on the surface of the metal liquid, greatly reducing the filtering and adsorbing effect. When the filter net is fixed by using bonded refractory coating, the refractory coating will fall off after being repeatedly washed by the metal liquid, causing alloy pollution. In addition, the tundish is usually made of ceramic and corundum materials, which have high hardness and are sensitive to vibration, and have poor mechanical processing performance. Therefore, the shape of the tundish needs to be formed during wet material pouring, and then the mold is removed and sintered, which is difficult to manufacture complex shapes. Therefore, a foam ceramic net fixing device for powder high-temperature alloy atomization pouring is proposed to solve the above problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a foam ceramic net fixing device for powder high-temperature alloy atomization pouring, which uses this space to symmetrically insert two circular arc wedge blocks to press the foam ceramic filter net downward, so that movement does not occur during steel liquid immersion.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a foam ceramic net fixing device for powder high-temperature alloy atomization pouring, comprising a tundish and a forming assembly, the inside of the tundish is provided with a fixing assembly, the back of the tundish is provided with a hole, and the top and bottom of the inner wall of the tundish are provided with cylindrical clamping grooves; The forming assembly comprises an outer mold, the inside of the outer mold is provided with an inner mold, the outer surface of the inner mold is provided with a wedge-shaped groove, the inside of the wedge-shaped groove is fixedly installed with a cylindrical clamping groove mold, the inside of the inner mold is provided with a strong magnet, and the back of the outer mold and the inner mold is fixedly installed with a connecting flange plate; The fixing assembly comprises a first half-round sleeve box and a second half-round sleeve box, the first half-round sleeve box and the second half-round sleeve box are connected, the inside of the first half-round sleeve box and the second half-round sleeve box is fixedly installed with a first circular arc wedge block and a second circular arc wedge block respectively, and the outer surface of the first half-round sleeve box and the second half-round sleeve box is fixedly installed with a cylindrical clamping pin.

[0006] Furthermore, the intermediate tundish has an inverted conical cylindrical structure, with a bottom hole connected to a guide pipe, and the cylindrical slots are symmetrically arranged in the middle of the intermediate tundish.

[0007] Furthermore, the two cylindrical slots are adapted to the two cylindrical pins. The first semi-circular sleeve and the second semi-circular sleeve are both cylindrical structures. The first semi-circular sleeve and the second semi-circular sleeve have two cross-sections at different angles along the diameter direction. The two cross-sections can be spliced ​​together to form an internal hollow area, into which a foam ceramic filter screen is placed.

[0008] Furthermore, the hollow area between the first and second semicircular boxes is formed by splicing two functional spaces, one of which has an axial angle with the first semicircular box and the other has an axial parallel to the second semicircular box.

[0009] Furthermore, the tops of both the first and second semicircular boxes are provided with pinch ears for clamping and adjusting the installation position and posture of the semicircular boxes; the cylindrical locking pin can be embedded in the cylindrical locking groove; a semicircular retaining ring is inserted into the gap after the foam ceramic filter screen is placed in the hollow area formed by one of the cross-sections of the first and second semicircular boxes.

[0010] Furthermore, the foam ceramic filter screen has a cylindrical three-dimensional mesh structure with irregular holes inside; the first and second arc wedges are both segments of a ring, which are respectively embedded in the hollow area formed by the first and second semicircular boxes to restrict the vertical displacement of the filter screen, and are made of the same material as the first and second semicircular boxes.

[0011] Furthermore, the outer mold and the inner mold are fixed together by a connecting flange to form a cavity for intermediate ladle casting.

[0012] Furthermore, the inner mold is made of plastic or non-magnetic stainless steel, and the wedge-shaped groove and the cylindrical slot mold fit tightly against the inner mold. A cylindrical groove is provided at the corresponding position of the wedge-shaped groove on the inner side of the inner mold to cooperate with a strong magnet.

[0013] Furthermore, the cylindrical slot mold is made of carbon steel or magnetic material, and one end is wedge-shaped to fit tightly with the wedge-shaped groove on the outer side of the inner mold. The strong magnet is made of magnetic material and is cylindrical to fit with the cylindrical groove on the inner side of the inner mold.

[0014] Furthermore, it also includes a method for forming cylindrical slots, characterized by the following specific steps: 1) Before filling with corundum slurry, install the cylindrical slot mold and the strong magnet in the corresponding grooves on the outer and inner sides of the inner mold; 2) The cylindrical slot mold and the strong magnet are tightly attached to the inner mold under magnetic force; 3) The inner mold and outer mold are fixed together by the connecting flange. Corundum slurry is poured into the top hole. Since the cylindrical slot mold is fixed by the wedge groove and strong magnet, no displacement will occur, ensuring the molding accuracy. 4) After the corundum slurry has cured, invert the mold, remove the strong magnet, remove the fasteners of the connecting flange, pull out the inner mold, and leave the cylindrical slot mold inside the corundum. 5) After the inner mold is removed, use a strong magnet to hold the cylindrical slot mold and slowly pull it out. Turn the mold over again, remove the outer mold, and the cylindrical slot in the middle is now complete.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. In this invention, a cylindrical foam ceramic filter screen is obliquely inserted into the first semi-circular box. The foam ceramic filter screen is in close contact with the upper surface of the inside of the first and second semi-circular boxes. Under the action of gravity, the foam ceramic filter screen falls into the bottom of the first and second semi-circular boxes. Due to the displacement of the foam ceramic filter screen in the hollow area inside the first and second semi-circular boxes, an arched semi-circular space is formed between the upper surface of the inside of the first and second semi-circular boxes and the foam ceramic filter screen. Two arc wedges are symmetrically inserted into this space to press the foam ceramic filter screen downward, so that it will not move during immersion in molten steel.

[0016] 2. This invention uses a molding assembly to fabricate cylindrical slots. Corundum slurry is poured into the holes formed by the inner and outer molds. Because the cylindrical slot mold is fixed by the wedge-shaped groove and a strong magnet, no displacement occurs, ensuring molding accuracy. After the corundum slurry solidifies, the mold is inverted, the strong magnet is removed, the connecting flange fasteners are removed, and the inner mold is pulled out. The cylindrical slot mold remains inside the corundum slurry. After the inner mold is removed, the strong magnet is used to hold the cylindrical slot mold in place and slowly pull it out. The mold is then flipped over again, and the outer mold is removed, quickly completing the fabrication of the cylindrical slot and fixing the foam ceramic mesh. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a front sectional view of the fixing component of the present invention; Figure 4 This is a top sectional view of the fixing component of the present invention; Figure 5 This is a schematic diagram of the fixed component structure of the present invention; Figure 6 This is a schematic diagram of the molding component of the present invention; Figure 7 This is a front sectional view of the molded component of the present invention.

[0018] In the diagram: 1. Intermediate liner; 2. Fixing component; 201. First semi-circular sleeve; 202. Second semi-circular sleeve; 203. First arc wedge; 204. Second arc wedge; 205. Cylindrical pin; 3. Hole; 4. Cylindrical slot; 5. Outer mold; 6. Inner mold; 7. Wedge groove; 8. Cylindrical slot mold; 9. Strong magnet; 10. Connecting flange. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-7 The foam ceramic mesh fixing device for powder high temperature alloy atomization casting in this embodiment includes an intermediate tundish 1 and a molding component. The intermediate tundish 1 is provided with a fixing component 2 inside. The back of the intermediate tundish 1 is provided with a hole 3. The top and bottom of the inner wall of the intermediate tundish 1 are provided with cylindrical slots 4. The molding assembly includes an outer mold 5, an inner mold 6 is provided inside the outer mold 5, a wedge-shaped groove 7 is provided on the outer surface of the inner mold 6, a cylindrical slot mold 8 is fixedly installed inside the wedge-shaped groove 7, a strong magnet 9 is provided inside the inner mold 6, and a connecting flange 10 is fixedly installed on the back of both the outer mold 5 and the inner mold 6. The fixing component 2 includes a first semi-circular sleeve 201 and a second semi-circular sleeve 202, which are connected to each other. A first arc wedge 203 and a second arc wedge 204 are fixedly installed inside the first semi-circular sleeve 201 and the second semi-circular sleeve 202, respectively. A cylindrical locking pin 205 is fixedly installed on the outer surface of both the first semi-circular sleeve 201 and the second semi-circular sleeve 202.

[0021] Specifically, a cylindrical foam ceramic filter screen is inserted obliquely into the first semi-circular sleeve 201, forming an oblique angle with the foam ceramic filter screen. The second semi-circular sleeve 202 is then fitted onto the other half of the foam ceramic filter screen at the same angle, so that the cut surfaces 1 of the first semi-circular sleeve 201 and the second semi-circular sleeve 202 with a certain angle along the diameter direction are in contact, while the other two surfaces 2 along the diameter direction are open. The internal hollow area formed by the first semi-circular sleeve 201 and the second semi-circular sleeve 202 is slightly larger than the foam ceramic filter screen.

[0022] Specifically, the foam ceramic filter screen is closely attached to the upper surface of the first semi-circular sleeve box 201 and the second semi-circular sleeve box 202. The semi-circular sleeve box and the foam ceramic filter screen in the attached state are placed into the intermediate bag. At this time, the space distance between the protruding cylindrical locking pins 205 on the outer side of the two semi-circular sleeve boxes is the smallest, which is less than the distance to the cylindrical locking groove 4 inside the intermediate bag 1.

[0023] Specifically, when the two cylindrical pins 205 move to the vicinity of the cylindrical slot 4, the first semi-circular box 201 and the second semi-circular box 202 are brought together and the ears are pinched to make the surface 2 fit together and the surface 1 open. At this time, the cylindrical pins 205 are inserted into the cylindrical slot 4, and the foam ceramic filter screen falls into the bottom of the first semi-circular box 201 and the second semi-circular box 202 under the action of gravity.

[0024] Specifically, the foam ceramic filter screen is closely attached to the lower top surface inside the first semicircular sleeve 201 and the second semicircular sleeve 202. Due to the displacement of the foam ceramic filter screen in the hollow area inside the first semicircular sleeve 201 and the second semicircular sleeve 202, an arched semicircular space is formed between the upper top surface inside the first semicircular sleeve 201 and the second semicircular sleeve 202 and the foam ceramic filter screen. Two arc wedges are symmetrically inserted into this space to press the foam ceramic filter screen downwards, so that it will not move during immersion in molten steel.

[0025] Specifically, the implementation process includes the following steps: I. Installation of Fixed Components 1) First, insert the cylindrical foam ceramic filter screen obliquely into the first semi-circular sleeve 201 so that the filter screen and the first semi-circular sleeve 201 form an oblique angle. Then, put the second semi-circular sleeve 202 on the other half of the filter screen at the same angle, so that the two semi-circular sleeves fit together along the oblique cut surface 1 in the diameter direction, while the other two surfaces 2 in the diameter direction remain open. At this time, the internal hollow area formed by the two semi-circular sleeves is slightly larger than the foam ceramic filter screen. 2) Hold the top of the two semi-circular boxes by pinching the ears, and put the semi-circular boxes and the filter into the middle bag 1 together. At this time, the space distance of the cylindrical locking pins 205 on the outside of the semi-circular boxes is the smallest, which is less than the distance of the cylindrical locking grooves 4 inside the middle bag 1, making it easy to move and adjust the position. 3) When the cylindrical pin 205 moves to the vicinity of the cylindrical slot 4, the pinch ears of the two semi-circular boxes are brought together, so that the cut surface 2 fits and the cut surface 1 opens. The cylindrical pin 205 is then inserted into the corresponding cylindrical slot 4, thus achieving the initial fixation of the semi-circular boxes in the intermediate package 1. 4) After the cylindrical locking pin 205 is fixed, the foam ceramic filter screen falls into the bottom of the two semi-circular boxes under the action of gravity, and is closely attached to the bottom surface of the box. At this time, an arched semi-circular space is formed between the top surface of the box and the filter screen. 5) Insert the first circular arc wedge 203 and the second circular arc wedge 204 symmetrically into the arched space. Press the foam ceramic filter screen downwards with the wedges to restrict its vertical displacement and ensure that the filter screen does not move under the immersion and impact of molten steel. If the gap between the filter screen and the sleeve is large, a semi-circular retaining ring can be added to the gap in the hollow area formed by the cut surface to assist in fixing. II. Fabrication of Key Structures for Cylindrical Slot Forming Intermediate Bundle 1) Before filling with corundum slurry, the cylindrical slot mold 8 is installed in the wedge-shaped groove 7 on the outside of the inner mold 6, and the strong magnet 9 is embedded in the corresponding cylindrical groove on the inside of the inner mold 6. The cylindrical slot mold 8 and the strong magnet 9 are tightly attached to the inner mold 6 by magnetic force to avoid displacement. 2) The inner mold 6 and the outer mold 5 are fixedly connected by the connecting flange 10 to form the cavity for intermediate ladle casting, ensuring that the mold assembly is stable. 3) Inject corundum slurry into the top hole formed by the inner mold 6 and the outer mold 5. Since the cylindrical slot mold 8 is doubly fixed by the wedge groove 7 and the strong magnet 9, it will not shift during the slurry injection process, thus ensuring the forming accuracy of the cylindrical slot 4. 4) After the corundum slurry has solidified, invert the mold as a whole, first remove the strong magnet 9 on the inside, then remove the fasteners of the connecting flange 10, and gently pull out the inner mold 6. At this time, the cylindrical slot mold 8 is still stuck inside the solidified corundum. 5) Use a strong magnet 9 to hold the retained cylindrical slot mold 8 from the inside of the intermediate package 1, slowly pull it out, flip the mold again, remove the outer mold 5, and the cylindrical slot 4 on the inner wall of the intermediate package 1 is completed and can be used for the subsequent installation of fixed components.

[0026] Example This embodiment is based on a Φ500mm intermediate tundish design. The component dimensions, materials, and operating parameters all meet the requirements for industrial mass production, as detailed below: I. Installation Example of Fixed Components (Adapted to Φ300mm Foam Ceramic Filter) 1. Component Specifications Cylindrical foam ceramic filter screen: 300mm in diameter, 120mm in height, 80% porosity, high temperature resistance ≥1600℃; The first semi-circular box 201 and the second semi-circular box 202 are made of high-temperature resistant corundum. The inner diameter of each box is 305mm and the height is 130mm. The slope of the first cut is 30° and the second cut is flat. The top flap is made of high-temperature resistant stainless steel (thickness 5mm and length 30mm). Cylindrical locking pin 205: 16mm in diameter and 25mm in length, two are symmetrically arranged on each side of the semi-circular sleeve, with a spacing of 80mm; First arc wedge 203 and second arc wedge 204: made of corundum, with an arc that fits the inner wall of the box, a thickness of 20mm, a height of 50mm, and a surface roughness Ra≤1.6μm; Semi-circular retaining ring: 5mm thick, 20mm wide, suitable for the inner diameter of the box, and made of the same material as the box. 2. Operational details Insert the Φ300mm filter screen into the first semi-circular box 201 at a 30° angle, ensuring that the outer wall of the filter screen and the inner wall of the box have a contact area of ​​≥80%. Then fit the second semi-circular box 202 at the same angle, so that the cut surface 1 is completely in contact (the contact gap is ≤0.3mm), and the opening gap of the cut surface 2 is 15-20mm. At this time, the diameter of the hollow area inside the box is 310mm, which is slightly larger than the diameter of the filter screen. Hold the two side handles with both hands and insert the box and filter screen together from the top opening of the middle bag 1. Slowly move it down along the inner wall to a position 150mm from the bottom of the bag. At this time, the cylindrical pins 205 are 60mm apart (less than the slot spacing of 85mm), and the position can be slightly adjusted laterally. When the cylindrical pin 205 is aligned with the Φ18mm cylindrical slot 4 on the inner wall of the intermediate bag, pinch the ear with both hands (approximately 50N force) to make the cut surface 2 fit together (gap ≤0.5mm), and open the cut surface 1 until the pin is fully embedded in the slot (embedded depth ≥20mm). At this time, the axis of the sleeve box coincides with the axis of the intermediate bag. After the clip is fixed, the filter screen falls into the bottom of the housing under the action of gravity and is completely attached to the bottom surface of the housing (without suspension). The top surface of the housing and the top of the filter screen form an arched semi-circular space with a height of 30mm. Insert two circular wedges symmetrically, and gently tap the top of the wedges with a wooden hammer (tapping force ≤30N) to press the bottom of the wedges against the filter screen, ensuring that the vertical displacement of the filter screen is ≤0.1mm; if the gap between the filter screen and the inner wall of the casing is >0.5mm, install a semi-circular retaining ring at the gap formed by the cut surface 1, with both ends of the retaining ring tightly fitted to the cut surface of the casing. II. Example of cylindrical slot forming (for Φ500mm intermediate ladle) 1. Component Specifications Inner mold 6: Material: cast iron, outer diameter: 490mm, height: 800mm, outer wedge groove 7 with an angle of 45° and a groove depth of 20mm, inner cylindrical groove with a diameter of 25mm and a depth of 30mm; Outer mold 5: Made of cast iron, with an inner diameter of 510mm and a height of 850mm, and a clearance of 10mm between it and the inner mold; Cylindrical slot mold 8: made of 45 steel, 18mm in diameter and 30mm in length, one end is a magnetic adsorption surface (attraction force ≥150N), and the other end is an arc-shaped guide surface; Strong magnet 9: made of neodymium iron boron, 22mm in diameter and 25mm in height, with a surface magnetic field strength ≥12000Gs; Connecting flange 10: made of Q235 steel, 12mm thick, with 8 M16 bolt holes evenly distributed; Corundum slurry: Corundum powder (Al2O3 content ≥95%) and water glass (modulus 3.2) are mixed at a mass ratio of 3:1, with a viscosity of 50-60s (Ford cup 4). 2. Operational details Before filling the slurry, four cylindrical slot molds 8 are respectively embedded into four wedge-shaped grooves 7 on the outside of the inner mold 6 (evenly distributed in the circumference, with a spacing of 90°). At the same time, four strong magnets 9 are embedded into the corresponding grooves on the inside of the inner mold to ensure that the slot molds and strong magnets are firmly attracted (without loosening). The exposed length of the slot mold is 25mm. The inner mold and outer mold are fixed together by M16 bolts through connecting flange 10. The bolt preload torque is 30 N·m to ensure that the coaxiality error of the mold is ≤0.3 mm and the cavity height is 800 mm. Pour corundum slurry into the mold from the top hole at a rate of 5L / min until the slurry overflows from the top hole (ensure no air bubbles). During the pouring process, gently tap the side wall of the outer mold (tap 2 times / second) to remove air bubbles from the slurry. Curing at room temperature (25℃) for 24 hours until the slurry is completely cured (compressive strength ≥15MPa), the mold is inverted (180°), the strong magnet 9 is removed from the inside of the inner mold, the flange bolts are removed, and the inner mold is slowly pulled out with a special lifting tool (pull force ≥5kN) (pulling speed 5mm / s). At this time, the slot mold remains in the cured corundum. Place the strong magnet 9 close to the corresponding position inside the tundish, attract the exposed end face of the slot mold, and slowly pull it out at a speed of 5mm / s (pulling force ≤200N). Turn the mold over again to remove the outer mold. The final formed cylindrical slot 4 has a diameter of 18mm and a depth of 25mm. The axis is perpendicular to the inner wall of the tundish, with a positional error of ±0.2mm.

[0027] Implementation effect verification Fixing effect: Under the impact of molten steel at 1500℃ (impact pressure 0.3MPa), the radial displacement of the filter screen is ≤0.1mm and the axial displacement is ≤0.05mm, with no loosening or falling off; Slot accuracy: The cylindrical slot size tolerance is ±0.2mm, and the circumferential distribution uniformity error is ≤0.3mm, which meets the requirements for repeated installation of the box.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for fixing a foamed ceramic web for powder superalloy atomization casting, comprising a tundish (1) and a shaping assembly, characterized in that, The interior of the tundish (1) is provided with a fixing assembly (2), the back of the tundish (1) is provided with a hole (3), and the top and bottom of the inner wall of the tundish (1) are provided with cylindrical clamping grooves (4); The forming assembly comprises an outer mold (5), the interior of the outer mold (5) is provided with an inner mold (6), the outer surface of the inner mold (6) is provided with a wedge-shaped groove (7), the interior of the wedge-shaped groove (7) is fixedly installed with a cylindrical clamping groove die (8), the interior of the inner mold (6) is provided with a strong magnet (9), and the back of the outer mold (5) and the inner mold (6) is fixedly installed with a connecting flange plate (10). The fixing assembly (2) comprises a first half-round sleeve box (201) and a second half-round sleeve box (202), the first half-round sleeve box (201) and the second half-round sleeve box (202) are connected, the interiors of the first half-round sleeve box (201) and the second half-round sleeve box (202) are fixedly installed with a first circular-arc wedge block (203) and a second circular-arc wedge block (204) respectively, and the outer surfaces of the first half-round sleeve box (201) and the second half-round sleeve box (202) are fixedly installed with cylindrical clamping pins (205).

2. The powdered high temperature alloy atomization and casting foam ceramic web fixture of claim 1, wherein, The tundish (1) is a reverse conical cylindrical structure, the bottom hole (3) is connected with a flow guide pipe, and the cylindrical clamping grooves (4) are symmetrically arranged at the middle part of the tundish (1).

3. The powdered high temperature alloy atomization and casting ceramic foam filter fixing device according to claim 1, characterized in that, The two cylindrical clamping grooves (4) are matched with the two cylindrical clamping pins (205), the first half-round sleeve box (201) and the second half-round sleeve box (202) are cylindrical structures, the first half-round sleeve box (201) and the second half-round sleeve box (202) have two cutting surfaces with different angles along the diameter direction, the two cutting surfaces can form an internal hollow region after splicing, and the hollow region is placed into a foam ceramic filter screen.

4. The powdered high temperature alloy atomization and casting ceramic foam filter fixture of claim 1, wherein, The hollow region of the first half-round sleeve box (201) and the second half-round sleeve box (202) is spliced from two functional spaces, one of the spaces has an inclination angle with the axial direction of the first half-round sleeve box (201), and the other space is parallel to the axial direction of the second half-round sleeve box (202).

5. The powdered high temperature alloy atomization and casting foam ceramic web fixture of claim 1, wherein, The top of the first half-round sleeve box (201) and the top of the second half-round sleeve box (202) are provided with pinch ears for clamping and adjusting the installation position and posture of the half-round sleeve box; the cylindrical clamping pin (205) can be embedded into the cylindrical clamping groove (4); the gap between the foam ceramic filter screen placed in the hollow region formed by one of the cutting surfaces of the first half-round sleeve box (201) and the second half-round sleeve box (202) is placed into a half-round clamping ring.

6. The powdered high temperature alloy atomization and casting ceramic foam filter fixture of claim 1, wherein, The foam ceramic filter screen is a cylindrical three-dimensional mesh structure, and the interior is an irregular hole; the first circular-arc wedge block (203) and the second circular-arc wedge block (204) are both a section of ring and are embedded into the hollow region formed by the first half-round sleeve box (201) and the second half-round sleeve box (202) respectively, so as to limit the up-down displacement of the filter screen, and the first half-round sleeve box (201) and the second half-round sleeve box (202) are made of the same material.

7. The powdered high temperature alloy atomization and casting ceramic foam filter fixture of claim 1, wherein, The outer mold (5) and the inner mold (6) are fixed through the connecting flange plate (10) to form a cavity for tundish pouring forming.

8. The powdered high temperature alloy atomization and casting ceramic foam filter fixture of claim 1, wherein, The inner mold (6) is made of plastic or non-magnetic stainless steel, the wedge-shaped groove (7) is tightly matched with the cylindrical clamping groove mold (8) and the inner mold (6), and the wedge-shaped groove (7) on the inner side of the inner mold (6) is provided with a cylindrical recess corresponding to the position and matched with the strong magnet (9).

9. The powdered high temperature alloy atomization foam ceramic web fixture of claim 1, wherein, The cylindrical clamping groove mold (8) is made of carbon steel or magnetic material, one end of which is wedge-shaped and can be tightly matched with the wedge-shaped groove (7) on the outer side of the inner mold (6), and the strong magnet (9) is made of magnetic material and is cylindrical and matched with the cylindrical recess on the inner side of the inner mold (6).

10. The powdered high-temperature alloy atomized pouring foam ceramic net fixing device according to claim 1, further comprising a cylindrical clamping groove (4) forming method, characterized in that, The specific steps are as follows: 1) Before filling the corundum slurry, the cylindrical clamping groove mold (8) and the strong magnet (9) are matched and installed in the recesses on the outer side and the inner side of the inner mold (6); 2) The cylindrical clamping groove mold (8) and the strong magnet (9) are tightly matched on the inner mold (6) under the magnetic force; 3) The inner mold (6) and the outer mold (5) are fixed together through the connecting flange plate (10), and the corundum slurry is poured into the top hole. Since the cylindrical clamping groove mold (8) is fixed by the wedge-shaped groove (7) and the strong magnet (9) and will not displace, the forming precision is ensured; 4) After the corundum slurry is solidified, the mold is inverted, the strong magnet (9) is taken out, the connecting flange plate (10) fastener is removed, the inner mold (6) is pulled out, and the cylindrical clamping groove mold (8) is retained in the corundum; 5) After the inner mold (6) is taken out, the cylindrical clamping groove mold (8) is slowly pulled out by the strong magnet (9), the mold is inverted again, the outer mold (5) is taken out, and the cylindrical clamping groove (4) of the tundish (1) is completed.

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