Cooling roller and vacuum rapid quenching equipment

Abstract

The utility model discloses a cooling roller and vacuum rapid quenching equipment, belongs to the technical field of rapid solidification, and solves the problem of insufficient cooling strength of the existing cooling roller. The cooling roller comprises a flange plate, a cooling sleeve and a core barrel, the flange plate, the cooling sleeve and the core barrel form a spindle-shaped streamline internal flow path, and the cooling medium flows through the internal flow path. The cooling roller further comprises a rotating shaft and a rotating dynamic seal, the cooling sleeve is a hollow cylinder without an end face, the two ends of the cooling sleeve are respectively connected with one flange plate, and the other ends of the two flange plates are respectively connected with the rotating shaft. The two flange plates and the cooling sleeve form a spindle-shaped internal space, the core barrel is arranged in the spindle-shaped internal space, and gaps are respectively reserved between the core barrel and the flange plates and between the core barrel and the cooling sleeve, so that a cooling medium from a rotating shaft can flow through the gaps; the two ends of the core barrel are respectively connected with the rotating shaft, and the rotating dynamic seal is arranged at the joint of the core barrel and the rotating shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rapid solidification technology, especially to a cooling roller and vacuum rapid quenching equipment. BACKGROUND

[0002] Vacuum rapid quenching technology (vacuum single roller strip casting) is the main technical means for batch preparation of amorphous alloy foil (thickness 10-50 microns). Due to the special state of vacuum, the alloy melt can only rely on heat conduction with the cooling roller to solidify to form amorphous foil, in order to achieve the cooling speed of 10 4 ~10 9 K / s for amorphous formation, which requires the cooling roller to provide sufficient cooling strength.

[0003] The internal waterway design of the cooling roller is the main means to improve the cooling strength, and the applicant has made related elaboration in the patent (ZL201621099453.5) and achieved certain effect in actual use, but the cooling strength still needs to be further improved. INVENTION CONTENTS

[0004] In view of the above, the utility model aims to provide a cooling roller and vacuum rapid quenching equipment and vacuum rapid quenching equipment, which are used to solve the problem of insufficient cooling strength of the existing cooling roller.

[0005] The utility model mainly aims to realize the following technical scheme:

[0006] In the first aspect, the utility model provides a cooling roller, which comprises a flange plate, a cooling sleeve and a core barrel; the flange plate, the cooling sleeve and the core barrel construct a spindle-shaped internal flow path of streamline type, and the cooling medium flows through the internal flow path.

[0007] Optionally, it also comprises a rotating shaft and a rotating dynamic seal, the cooling sleeve is a hollow cylinder without end face, both ends of the cooling sleeve are connected with a flange plate respectively, and the other end of the two flange plates is connected with the rotating shaft respectively;

[0008] The two flange plates form a spindle-shaped internal space with the cooling sleeve, the core barrel is arranged in the spindle-shaped internal space, and a gap is left between the core barrel and the flange plate and the cooling sleeve respectively to allow the cooling medium to flow from the rotating shaft;

[0009] Both ends of the core barrel are connected with the rotating shaft respectively, and the rotating dynamic seal is arranged at the connection between the core barrel and the rotating shaft.

[0010] Optionally, the rotating shaft is hollow to allow the cooling medium to flow; the rotating shaft comprises two sections, one section is used for the inflow of the cooling medium, and the other section is used for the outflow of the cooling medium; each section of the rotating shaft is connected with the smaller end of the flange plate in diameter.

[0011] Optionally, each rotating shaft has one end open and the other end closed.

[0012] Optionally, a through hole is arranged on the side wall of each rotating shaft and communicates with the outside, and the through hole is arranged at the gap between the flange plate and the core barrel to realize the inflow or outflow of the cooling medium in the rotating shaft and the internal flow path.

[0013] Optionally, the number of through holes is multiple, and the multiple through holes are uniformly arranged along the circumference of the rotating shaft.

[0014] Optionally, a locking member is further arranged at the connection between the core barrel and the rotating shaft to fix the core barrel and the rotating shaft.

[0015] Optionally, the locking member comprises a buckle.

[0016] Optionally, the core barrel has a cavity structure.

[0017] In the second aspect, the utility model also provides a vacuum rapid quenching equipment, including the rapid quenching vacuum storehouse, be equipped with above-mentioned cooling roll in the rapid quenching vacuum storehouse.

[0018] Compared with the prior art, the utility model can realize at least one of the following beneficial effects:

[0019] a) The flange plate of the utility model has a conical structure, and after being connected with the hollow cooling sleeve without end face, an internal space in the shape of spindle is formed, the core barrel is in the shape of spindle and has a sealed cavity structure, and the core barrel corresponds to the internal space in the shape of spindle formed by the flange plate and the cooling sleeve and has a gap between the flange plate and the cooling sleeve, so that an internal flow path in the shape of spindle is constructed. The streamlined structure design is beneficial to overcome the centrifugal force, can reduce the influence of the centrifugal force of the high-speed rotating cooling roll on the internal flow of the cooling medium, especially the cooling medium in the annular water path between the cooling sleeve and the core barrel, and is further beneficial to the rapid distribution of the cooling medium through the inlet and the rapid collection of the cooling medium through the internal flow path to the outlet, so that the cooling medium can be quickly passed, on the one hand, more heat can be taken away in a short time, and the purpose of efficient heat exchange is achieved, so that the cooling strength is improved; on the other hand, the cooling uniformity is increased, and the amorphous ribbon yield is increased to more than 80% (the amorphous ribbon yield of the prior art is about 50%).

[0020] b) The utility model is connected with a rolling bearing at the connection end of the core barrel and the rotating shaft, so that the core barrel is in a follow-up state when the rotating shaft and the cooling sleeve rotate, which is equivalent to applying a shear force perpendicular to the centrifugal force direction to the internal cooling medium, the purpose is to offset a part of the centrifugal force, increase the axial movement efficiency of the cooling medium, and improve the cooling strength of the rotating cooling roll.

[0021] c) The utility model discloses a locking piece is set up to fix core bucket with rotating shaft, realizes that core bucket is in the rotating state, namely core bucket rotates with rotating shaft and rotates. The cooling intensity of core bucket is different in the follow-up state and rotating state (see table 1), thereby realize the adjustment of cooling intensity, expand the application range of the utility model discloses rotating cooling roller.

[0022] d) The utility model discloses the inner wall of flange plate sets up the flow guide groove, can realize the quick distribution of cooling medium, guarantees that cooling medium can pass through quickly, can take away more heat in short time, plays the purpose of high -efficient heat exchange, thereby further improves cooling intensity.

[0023] e) The utility model discloses the inner wall of cooling jacket is equipped with single -way or multichannel spiral groove, through the control cooling medium's flow direction and cooling roller's rotating direction are opposite, increase system cooling capacity, thereby improve cooling intensity.

[0024] f) The cooling roller of the utility model has good popularization and practical value, is applied to vacuum rapid quenching equipment, can prepare the alloy system amorphous foil belt of urgent need in the field of aviation and spaceflight, not having strong noncrystalline formation ability, and after widely popularization and application, will produce good economic benefit and social benefit.

[0025] g) The utility model discloses the rotating cooling roller in vacuum rapid quenching equipment constructs the internal flow path of fusiform streamline structure, is favorable to overcome centrifugal force effect, can reduce the influence of cooling roller high -speed rotation centrifugal force to cooling medium internal flow not smooth, especially cooling medium in the annular waterway between cooling jacket and core bucket, further favorable to cooling medium through the entrance quick distribution, and gather to the export flow through internal flow path, guarantee that cooling medium can pass through quickly, on the one hand, can take away more heat in short time, plays the purpose of high -efficient heat exchange, thereby improves cooling intensity, on the other hand, can increase cooling uniformity, improves amorphous band material yield rate to 80% or above (the amorphous band material yield rate of prior art is about 50%).

[0026] The other features and advantages of the present application will be further clarified by the following description of the specification, and some become apparent from the specification, or are learned by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the contents particularly pointed out in the written specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application, and together with the description serve to explain the principles of the present application.

[0028] Figure 1 It is the structure schematic diagram of the utility model discloses rotating cooling roller;

[0029] Figure 2 Figure 6 is a flow field velocity vector diagram (longitudinal section) of the rotating cooling roller of the present application; (a) core barrel rotation, (b) core barrel follow-up;

[0030] Figure 3 Figure 7 is a flow field velocity vector diagram (longitudinal section) of the rotating cooling roller of the present application; (a) core barrel rotation, (b) core barrel follow-up;

[0031] Figure 4 Figure 8 is a schematic diagram of the structure of the vacuum rapid quenching device of the present application.

[0032] Reference signs:

[0033] 1-rotating shaft; 2-flange plate; 3-cooling copper sleeve; 4-core barrel; 5-rotary dynamic seal; 6-rolling bearing; D-spiral groove width; h-spiral groove height; 7-melting furnace vacuum chamber; 8-melting device; 9-rapid quenching vacuum chamber; 10-vacuum stock bin; 11-online instant polishing device; 12-rotating cooling roller; 13-rotary disc type tundish system; 14-strip guiding and cooling roller; 15-strip anti-accumulation track. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, wherein the drawings form a part of the present application and are used to explain the principles of the present application together with the embodiments of the present application.

[0035] In a first aspect, the present application provides a rotating cooling roller. As shown in Figure 1 the rotating cooling roller comprises a rotating shaft 1, a flange plate 2, a cooling sleeve 3, a core barrel 4, a rotary dynamic seal 5 and a rolling bearing 6.

[0036] The flange plate 2, the core barrel 4 and the cooling sleeve 3 form an internal flow path, and the cooling medium flows through the internal flow path. Figure 1 The arrows indicate the flow direction of the cooling medium.

[0037] The cooling sleeve 3 is a hollow cylinder without an end face, and the two ends of the cooling sleeve are connected with a flange plate 2 respectively, and the other ends of the two flange plates 2 are connected with the rotating shaft 1 respectively. The two flange plates 2 and the cooling sleeve 3 form a spindle-shaped internal space, and the core barrel 4 is arranged in the internal space formed by the flange plate 2 and the cooling sleeve 3, and gaps are respectively left between the core barrel 4 and the flange plate 2 and between the core barrel 4 and the cooling sleeve 3 for the cooling medium to flow through. Specifically, as shown in Figure 1 the longitudinal section of the structure formed by the flange plate 2 and the cooling sleeve 3 is similar to a hexagon.

[0038] The flange 2 has a conical structure with a conical angle of 40-70 degrees, for example, 40 degrees, 50 degrees, 60 degrees, or 70 degrees. The inner wall of the flange 2 is provided with a flow guide groove, which can enable the cooling medium (for example, water) to be quickly distributed after entering the cooling roller.

[0039] Specifically, the flange 2 is connected to the cooling sleeve 3 at the end with a large diameter, and is connected to the rotating shaft 1 at the end with a small diameter.

[0040] The core barrel 4 has a spindle-shaped sealing cavity structure, and its shape corresponds to the internal space of the spindle shape. The two ends of the core barrel 4 are respectively connected to the rotating shaft 1. The connection between the core barrel 4 and the rotating shaft 1 is fixedly connected with a rolling bearing 6, which can enable the core barrel 4 to be in a follow-up state (water flow) when the rotating shaft 1 and the cooling sleeve 3 rotate.

[0041] The flange 2, the core barrel 4, and the cooling sleeve 3 form an internal flow path with a spindle-shaped streamline structure. The streamline structure design is beneficial to overcome the centrifugal force effect, can reduce the influence of the centrifugal force of the high-speed rotating cooling roller on the cooling medium, especially the cooling medium in the annular water path between the cooling sleeve and the core barrel, and is further beneficial to the quick distribution of the cooling medium through the inlet and the quick collection of the cooling medium through the internal flow path to the outlet, thereby improving the cooling strength.

[0042] In a preferred embodiment, the longitudinal section of the core barrel 4 is similar to a hexagon.

[0043] In another embodiment, the rotating cooling roller further comprises a locking member (for example, a buckle), which is arranged at the connection between the core barrel 4 and the rotating shaft 1 to fix the core barrel 4 and the rotating shaft 1. At this time, the core barrel 4 is in a rotating state, that is, the core barrel 4 rotates with the rotating shaft 1. The present application can realize the switching of the core barrel 4 between the follow-up state and the rotating state by arranging the locking member, and the cooling strength of the core barrel 4 in the follow-up state and the rotating state is different (see Table 1), thereby realizing the adjustment of the cooling strength and expanding the application range of the rotating cooling roller of the present application.

[0044] Specifically, the rotating shaft 1 is hollow inside to allow the cooling medium to flow through. The rotating shaft 1 includes two sections, one section for the inflow of the cooling medium and the other section for the outflow of the cooling medium. Each section of the rotating shaft is connected to the small-diameter end of the flange 2. The rotating shaft 1 is open at one end and closed at the other end. Each section of the rotating shaft is provided with a through hole communicating with the outside, which is arranged at the gap between the flange 2 and the core barrel 4 to realize the inflow or outflow of the cooling medium in the rotating shaft and the internal flow path, that is, the inflow of the cooling medium in the rotating shaft 1 into the internal flow path or the outflow of the cooling medium in the internal flow path into the rotating shaft 1, thereby realizing the collection of the cooling medium flowing through the internal flow path to the outlet.

[0045] Specifically, the number of through holes is multiple, and the multiple through holes are uniformly arranged along the circumference of the rotating shaft 1.

[0046] In a preferred embodiment, a rotary dynamic seal 5 is further arranged at the connection between the core barrel and the rotating shaft to prevent the cooling medium in the internal flow path from flowing into the cavity of the core barrel 4.

[0047] It should be noted that, compared with the solid structure, the design of the core barrel 4 in the cavity structure is beneficial to reduce the weight of the cooling roller, save raw materials, and reduce the cost.

[0048] The inner wall of the cooling jacket 3 is provided with single or multiple spiral grooves to form spiral water channels. Preferably, multiple spiral grooves are provided, for example, 3-5 parallel spiral grooves. In use, the cooling medium flows in the opposite direction to the rotation direction of the cooling roller to increase the cooling capacity of the system.

[0049] Specifically, the pitch S of the spiral groove is 50-100 mm. The cross section of the spiral groove is semi-elliptical, semicircular, triangular, rectangular or trapezoidal. When the cross section of the spiral groove is semi-elliptical or rectangular, the ratio of the width to the height is 2-3.5. By arranging the spiral groove on the inner wall of the cooling jacket 3, the present application can reduce the dead zone of the cooling medium in the spiral water channel formed by high-speed rotation, which is relatively stationary with the inner surface of the cooling roller. The existence of the dead zone causes the cooling medium water to contact and vaporize on the inner surface of the cooling roller, forming a gas film that hinders heat transfer, and in severe cases (excessive steam pressure), it is easy to cause danger. By arranging the spiral groove on the inner wall of the cooling jacket 3, the present application improves the cooling intensity and the production safety.

[0050] The material of the cooling jacket 3 is copper, copper alloy or other materials with high thermal conductivity. The gap between the cooling jacket 3 and the core barrel 4 is 5-10 mm, for example, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. The gap between the flange plate 2 and the core barrel 4 is 30-40 mm, for example, 30 mm, 32 mm, 35 mm, 37 mm, 39 mm or 40 mm.

[0051] In a second aspect, the present application provides a vacuum rapid quenching device, as shown in the accompanying drawings, comprising a melting furnace vacuum chamber 7, a rapid quenching vacuum chamber 9 and a vacuum material chamber 10 arranged in sequence. Figure 4 The melting furnace vacuum chamber 7, the rapid quenching vacuum chamber 9 and the vacuum material chamber are independent and closed structures, and can be connected with the atmosphere to perform corresponding operations respectively without affecting each other.

[0052] The melting furnace vacuum chamber 7 is provided with a smelting device 8, and the smelting device 8 is provided with a smelting crucible for placing a master alloy.

[0053] The rotating cooling roller 12, the rotary disc type tundish system 13, the strip guiding and cooling roller 14 and the strip anti-piling track 15 are sequentially arranged in the vacuum quenching chamber 9.

[0054] In a specific embodiment, the melting device 8 is a medium frequency melting furnace. The capacity of the medium frequency melting furnace is 10-300 kg, preferably 50-150 kg.

[0055] The rotary disc type tundish system 13 is provided with 3-5 rotatable independent tundishes, each of which can be driven by a horizontal disc to rotate and / or stop along the circumference of the disc. The rotating cooling roller 12 is arranged below the tundish, and a nozzle is arranged below each tundish to spray a cooling medium to the rotating cooling roller 12. Exemplarily, the capacity of the tundish is 25-100 kg.

[0056] In a preferred embodiment, the vacuum rapid quenching device further comprises an online instant polishing device 11 arranged towards the working surface of the rotating cooling roller 12, which can polish and finish the surface of the rotating cooling roller 12 when the melting device 8 is charging and melting.

[0057] The strip guiding and cooling roller 14 is a two-roller adjustable slit structure arranged at the exit end of the strip from the rotating cooling roller 12, which controls the flight state of the strip after leaving the roller, guides the strip to pass through the slit into the strip anti-piling track 15, and performs secondary cooling on the strip.

[0058] Example 1 (spindle-shaped cooling roller, core barrel follow-up)

[0059] In this embodiment, the rotating cooling roller has a shaft diameter of 100 mm, a cooling sleeve material of copper, an outer diameter of 380 mm, a core barrel outer diameter of 304 mm, and four parallel spiral grooves formed on the inner wall of the copper sleeve. The width-height ratio D / h of the spiral groove is 2.5, and the pitch S is 80 mm.

[0060] Example 2 (spindle-shaped cooling roller, core barrel rotation)

[0061] This embodiment is basically the same as Example 1, except that it further includes a locking member (buckle) for fixing the core barrel 4 to the rotating shaft 1, so that the core barrel is in a rotating state.

[0062] Comparative Example 1 (right-angle-shaped cooling roller, core barrel rotation)

[0063] Compared with Example 1, the structure of the rotating cooling roller is the structure disclosed in the patent with the patent number ZL201621099453.5.

[0064] Under the same simulation conditions, the velocity field and temperature field of the rotating cooling rollers in Example 1, Example 2 and Comparative Example 1 during cooling were analyzed by using finite element simulation means, and the results are as follows Figure 2 and Figure 3The simulation data is listed in Table 1.

[0065] Table 1 Simulation data analysis table

[0066]

[0067] From the data in Table 1, it can be seen that the outlet water speed of the spindle-shaped cooling roller (Example 1 and Example 2) is obviously greater than that of the right-angle-shaped cooling roller (Comparative Example 1), and the outlet speed of the cooling medium after passing through the spindle-shaped copper roller is faster, which indicates that the cooling medium can take away more heat in a short time, so that the outlet water temperature of the spindle-shaped cooling roller (Example 1 and Example 2) is obviously higher than that of the right-angle-shaped cooling roller (Comparative Example 1), which proves that the cooling strength of the spindle-shaped cooling roller is obviously greater than that of the right-angle-shaped cooling roller.

[0068] Further, by comparing the data of Example 1 and Example 2 in Table 1, it is found that, compared with the core barrel rotation (Example 2), the outlet water speed of the core barrel follow-up (Example 1) is faster, and the tangential direction speed of the cooling medium between the cooling jacket and the core barrel is smaller. The smaller the tangential direction speed of the cooling medium between the cooling jacket and the core barrel, the smaller the effect of centrifugal force. Therefore, it can be known that, compared with the core barrel rotation (Example 2), the core barrel follow-up (Example 1) can reduce the influence of centrifugal force, improve the axial passing capacity of the cooling medium, further improve the cooling efficiency, and then improve the cooling strength.

[0069] In addition, from the velocity nephogram of the cooling medium between the cooling jacket and the core barrel, Figure 2 and Figure 3 It can be seen that, although the outlet water speed of the core barrel rotation (Example 2) is slower than that of the core barrel follow-up (Example 1), the outlet water speed of the core barrel rotation (Example 2) is faster than that of the right-angle-shaped cooling roller (Comparative Example 1). Figure 2 In the velocity nephogram, the left side is the core barrel rotation state, and the cooling water flow rate is faster (the nephogram is red), but from the right side, the core barrel follow-up state, the cooling water flow rate is slower (the nephogram is blue). Figure 3 It can be further known that the fast speed is because the tangential direction speed is large, that is, the influence of centrifugal force is large, which finally causes the slow outlet water speed.

[0070] Example 3

[0071] The cooling rollers of Example 1 and Example 2 are respectively installed and vacuum rapid quenching experiments are carried out, an alloy system Ti-based alloy is selected, the alloy composition is TiZrCuNiNb, and under the same rapid quenching process parameters (as shown in Table 2), a strip is prepared.

[0072] Table 2 Vacuum rapid quenching process parameter table

[0073] Vacuum (Pa) 4 x 10 -2 ]] Melt temperature (°C) 1350 Roll nip (mm) 0.5 Nozzle gap (mm) 0.4 Copper roll speed (m / s) 30 Blow air pressure (Pa) 50000

[0074] The alloy system uses the spindle-shaped copper roller (Example 2, core barrel rotation) to carry out vacuum rapid quenching experiment, and the band-shaped edge has local crystallization, which indicates that the cooling strength of the cooling roller is insufficient to prepare completely amorphous band material. The spindle-shaped copper roller (Example 1, core barrel follow-up) of the utility model can prepare the band material with bright surface quality, complete band type and complete amorphous.

[0075] Example 4

[0076] The cooling rollers of Example 1 and Example 2 are respectively installed and vacuum rapid quenching experiments are carried out, an alloy system Ti-based alloy is selected, the alloy composition is TiZrNiBe, under the same rapid quenching process parameters (as shown in Table 3), the band material is prepared.

[0077] Table 3: Vacuum rapid quenching process parameters

[0078] Vacuum (Pa) 4 x 10 -2 ]] Melt temperature (°C) 1200 Roll nip (mm) 0.4 Nozzle gap (mm) 0.3 Copper roll speed (m / s) 28 Blow air pressure (Pa) 17000

[0079] The alloy system uses the spindle-shaped copper roller (Example 2, core barrel rotation) to carry out vacuum rapid quenching experiment, and the band-shaped is discontinuous, which indicates that the cooling strength of the cooling roller is insufficient to prepare completely amorphous band material. The spindle-shaped copper roller (Example 1, core barrel follow-up) of the utility model can prepare the band material with complete band shape, continuity and complete amorphous.

[0080] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of the changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A cooling roll, characterized in that The cooling roll comprises a flange, a cooling jacket and a core barrel; the flange, the cooling jacket and the core barrel form a spindle-shaped internal flow path through which a cooling medium flows.

2. The cooling roll according to claim 1, characterized in that The cooling jacket is a hollow cylinder without end face, and two ends of the cooling jacket are connected with two flanges respectively; the other ends of the two flanges are connected with a rotating shaft respectively; The two flanges form a spindle-shaped internal space with the cooling jacket, and the core barrel is arranged in the spindle-shaped internal space and has a gap with the flange and the cooling jacket respectively to allow the cooling medium to flow from the rotating shaft; Two ends of the core barrel are connected with the rotating shaft respectively, and the rotating dynamic seal is arranged at the connection between the core barrel and the rotating shaft.

3. The cooling roll according to claim 2, characterized in that The rotating shaft is hollow to allow the cooling medium to flow therethrough; the rotating shaft comprises two sections, one section for inflow of the cooling medium and the other section for outflow of the cooling medium; each section of the rotating shaft is connected with a small-diameter end of the flange.

4. The cooling roll according to claim 3, characterized in that Each section of the rotating shaft is open at one end and closed at the other end.

5. The cooling roll of claim 4, wherein A through hole is arranged on the side wall of each section of the rotating shaft to communicate with the outside; the through hole is arranged at the gap between the flange and the core barrel to realize inflow or outflow of the cooling medium in the rotating shaft and the internal flow path.

6. The cooling roll of claim 5, wherein The number of the through holes is multiple, and the multiple through holes are uniformly arranged along the circumference of the rotating shaft.

7. The cooling roll of claim 2, wherein A locking member is further arranged at the connection between the core barrel and the rotating shaft to fix the core barrel and the rotating shaft.

8. The cooling roll of claim 7, wherein The locking member comprises a buckle.

9. Cooling roll according to any of claims 1 to 8, characterized in that The core barrel has a cavity structure.

10. A vacuum rapid quench apparatus characterized by, The cooling roll further comprises a quick-quench vacuum chamber, and the quick-quench vacuum chamber is provided with the cooling roll according to any one of claims 1-9.

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