Cooling system and cooling method and rapid solidification alloy sheet

Abstract

The application provides a cooling system and a cooling method and a rapid solidification alloy sheet. The cooling system comprises a chamber, a first chamber and a second chamber which are mutually through in a material conveying direction; at least one feeding hole is arranged on the top of the first chamber near one end of the second chamber; a plug valve is arranged on the end of the second chamber far from the first chamber for discharging and sealing; the second chamber is provided with a pressurizing valve and a decompressing valve; a collecting device is arranged in the first chamber and is provided with a water cooling unit; a conveying device is arranged on the bottom of the chamber for conveying the collecting device in the material conveying direction. The cooling system and the cooling method can greatly improve the cooling speed of the alloy sheet, thereby refining the size of the secondary particles in the rapid solidification alloy sheet, making the secondary particles more easily broken in the subsequent hydrogen breaking process, thereby improving the magnetic performance of the product; and the discharging and conveying time is saved, the production efficiency is greatly improved, and the use of manpower is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a cooling system and a cooling method and a rapid solidification alloy sheet. BACKGROUND

[0002] In the prior art, after the neodymium-iron-boron alloy sheet is cast, air cooling or water cooling needs to be carried out in an oxygen-free sealed container for secondary crystallization. It takes about 4 hours or more to cool the alloy sheet, and then the alloy sheet can be discharged out of the vacuum. However, when the alloy sheet is discharged, the alloy sheet needs to be poured out of the alloy sheet tank into a transfer container, and then transported to the next process for feeding. In the process of discharging and feeding, 1.5 hours is needed, which seriously affects the production capacity and work efficiency. SUMMARY

[0003] The present application solves the technical problem of the slow cooling speed of the alloy sheet in the prior art, which affects the subsequent process and reduces the magnetic properties of the magnetic material in the subsequent process. A cooling system and a cooling method and a rapid solidification alloy sheet are provided. The cooling system and the cooling method of the present application can greatly improve the cooling speed of the alloy sheet, thereby refining the size of the secondary particles in the rapid solidification alloy sheet, making it easier to be broken in the subsequent hydrogen breaking process, thereby improving the magnetic properties of the product. The cooling system and the cooling method of the present application save the discharging and transporting time, greatly improve the production efficiency and reduce the use of manpower.

[0004] The present application provides a cooling system, which comprises:

[0005] a chamber, the chamber comprising a first chamber and a second chamber which are mutually through in a material conveying direction; the first chamber is provided with at least one feeding hole at the top of one end close to the second chamber; the second chamber is provided with a plug valve at one end away from the first chamber for discharging and sealing; the second chamber is provided with a pressurizing valve and a depressurizing valve;

[0006] a collecting device, the starting position of the collecting device being located in the interior of the first chamber; the collecting device is provided with a water cooling unit;

[0007] a conveying device, the conveying device being located at the bottom of the chamber for conveying the collecting device in the material conveying direction.

[0008] In some embodiments, the height of the first chamber is less than the height of the second chamber.

[0009] In some embodiments, the water cooling unit comprises a cooling water pipeline; preferably, the cooling water pipeline is arranged at the bottom, the side wall or the interior of the collecting tank.

[0010] In some embodiments, the number of feeding holes is two; preferably, the arrangement direction of the two feeding holes at the top of the first chamber is perpendicular to the material conveying direction.

[0011] In some embodiments, a material guiding cylinder is installed above the feeding hole, which includes one feeding port and at least one discharging port; preferably, the material guiding cylinder is in inverted Y shape, including one feeding port and two discharging ports; more preferably, the diameter of the material guiding cylinder is 400 mm. The inverted Y-shaped material guiding cylinder can divide the added alloy pieces into two piles, so as to avoid the alloy pieces from piling up together, which affects the cooling speed and cooling effect.

[0012] In some embodiments, a baffle is arranged in the vertical direction inside the chamber, which is arranged downstream of the feeding hole in the material conveying direction, so as to flatten the material during the conveying process, so that the alloy pieces are piled up in a limited height, thereby improving the cooling effect; preferably, the bottom of the baffle is in sawtooth shape, more preferably, the length of the sawtooth is 10 mm; preferably, the baffle is arranged inside the second chamber close to the side of the first chamber; preferably, the baffle is connected to a telescopic rod arranged on the lower surface of the top surface of the chamber, which is used to control the up-and-down movement of the baffle in the vertical direction.

[0013] In further embodiments, the length, height and thickness of the baffle are 1400 mm, 150 mm and 15 mm, respectively.

[0014] In some embodiments, the conveying device includes a guide rail; the guide rail is arranged on the inner bottom surface of the chamber.

[0015] In some embodiments, the side surface of the chamber is provided with a plurality of sealing windows for maintenance and cleaning; preferably, the side surface of the first chamber is provided with two sealing windows; preferably, the side surface of the second chamber is provided with two sealing windows.

[0016] In some embodiments, the collecting device includes a collecting groove.

[0017] In some embodiments, a hydraulic cylinder is further attached to the bottom of the collecting groove, which is used to lift one side of the collecting device after the material is cooled, so as to realize the dumping of the material; the hydraulic cylinder can move with the collecting groove.

[0018] In specific embodiments, the inlet end of the cooling system is connected to the discharging port of the smelting device; thereby realizing the automatic discharging of the alloy pieces obtained from the smelting process.

[0019] In specific embodiments, the outlet end of the cooling system is connected to the inlet end of the hydrogen breaking device; thereby realizing the automatic feeding of the hydrogen breaking process.

[0020] In a further embodiment, the sum of the length of the first cavity and the second cavity is 8500 mm, wherein the length of the first cavity is 4300 mm and the length of the second cavity is 4200 mm; the width of the first cavity and the second cavity is 2000 mm; the height of the first cavity is 1000 mm and the height of the second cavity is 2000 mm.

[0021] In a further embodiment, the length, width and height of the collecting groove are 4000 mm, 1500 mm and 250 mm, respectively. The collecting groove can collect 4 t of alloy pieces.

[0022] The application also provides a cooling method, which uses the cooling system as described above and comprises the following steps:

[0023] S1, adding the material to be cooled into the collecting device through the feeding hole for water cooling;

[0024] S2, transporting the collecting device from the first chamber to the second chamber through the conveying device;

[0025] S3, introducing or discharging the protective gas into the second chamber through the pressurizing valve and the depressurizing valve, respectively, for air cooling, wherein the air cooling time is 0.5-2 h, and the rapidly solidified alloy pieces are obtained;

[0026] In some embodiments, step S1 is performed before step S2, or step S1 is performed simultaneously with step S2.

[0027] In some embodiments, in step S1, the bulk density of the material to be cooled in the collecting device is 2.5-2.9 g / cm 3 , for example, 2.72 g / cm 3 .

[0028] In some embodiments, in step S1, the collecting device is provided with a cooling water pipeline, wherein the water flow in the cooling water pipeline is 30-50 m 3 / h, and the water temperature in the cooling water pipeline is less than 35℃.

[0029] In some embodiments, in step S1, two feeding holes are formed at the top of the first chamber, and two discharge outlets of the inverted Y-shaped guide cylinder are respectively inserted into the two feeding holes, and the material to be cooled is added into the collecting device through the inverted Y-shaped guide cylinder.

[0030] In some embodiments, in step S1, the baffle inside the second chamber on the side close to the first chamber in the vertical direction is moved downward by the telescopic rod when the material to be cooled is added; the baffle is moved to a position 45 mm away from the bottom of the collecting groove.

[0031] In specific embodiments, in step S2, the conveying speed of the conveying device is 4.5-5.0 mm / s, for example 4.87 mm / s, so that the material to be cooled can be evenly laid in the collecting device, which is conducive to uniform cooling.

[0032] In specific embodiments, in step S2, after the material to be cooled is evenly distributed in the collecting device, the baffle is moved upward by the telescopic rod.

[0033] In some embodiments, in step S3, the protective gas comprises argon.

[0034] In some embodiments, in step S3, the second chamber is pressurized to 60-80 kPa by the pressurizing valve.

[0035] In some embodiments, in step S3, after the protective gas is cooled for 30 min, the second chamber is depressurized to 2 kPa by the depressurizing valve.

[0036] In some embodiments, in step S3, the time for air cooling is 1-1.5 h.

[0037] In some embodiments, in step S3, the temperature of the rapid-solidified alloy sheet is less than 50℃.

[0038] In some embodiments, in step S3, after the rapid-solidified alloy sheet is obtained, the conveying device is moved out of the second chamber by 1500 mm, and then the ejection is prepared.

[0039] In some embodiments, in step S3, after the rapid-solidified alloy sheet is obtained, the hydraulic cylinder attached to the bottom of the collecting groove is opened, and the rapid-solidified alloy sheet is transferred.

[0040] In specific embodiments, in step S3, the collecting device is lifted by the hydraulic cylinder at a lifting speed of 1.8 mm / s to realize the ejection.

[0041] In the present application, the above cooling device can be used to simultaneously perform air cooling and water cooling on the alloy sheet, further shorten the cooling time, and is conducive to the uniform distribution of the neodymium-rich phase, the refinement of the size of the secondary particles in the rapid-solidified alloy sheet, and the easier breaking of the secondary particles in the subsequent hydrogen breaking process, thereby improving the magnetic performance of the product.

[0042] The application also provides a rapid solidification alloy sheet, and a preparation method thereof, which comprises the cooling method as described above.

[0043] On the basis of common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily, thereby obtaining preferred examples of the application.

[0044] The reagents and raw materials used in the application are commercially available.

[0045] The positive progress effect of the application is that:

[0046] (1) The cooling system and the cooling method of the application can greatly increase the cooling speed of the alloy sheet and reduce the time required for cooling, thereby refining the size of the secondary particles in the rapid solidification alloy sheet, making it easier to be broken in the subsequent hydrogen breaking process, and thus improving the magnetic properties of the product.

[0047] (2) The cooling system and the cooling method of the application save the time for discharging and transferring, greatly improve the production efficiency and reduce the use of manpower. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is a perspective view of the cooling system of Example 1 of the application.

[0049] Figure 2 It is a front view of the cooling system of Example 1 of the application.

[0050] Figure 3 It is a left view of the cooling system of Example 1 of the application.

[0051] Figure 4 It is a top view of the cooling system of Example 1 of the application.

[0052] Figure 5 It is a structural schematic view of the cooling equipment commonly used for cooling alloy sheets in Comparative Example 1.

[0053] Figure 6 It is a distribution diagram of the neodymium-rich phase of the rapid solidification alloy sheet prepared in Example 2 of the application.

[0054] Figure 7 It is a distribution diagram of the neodymium-rich phase of the rapid solidification alloy sheet prepared in Comparative Example 1.

[0055] Explanation of reference signs:

[0056] First chamber 1

[0057] Second chamber 2

[0058] Sealing window 3

[0059] Collecting groove 4

[0060] Water inlet pipe 5

[0061] water outlet pipe 6

[0062] material guide cylinder 7

[0063] baffle 8

[0064] guide rail 9

[0065] pressurizing valve 10

[0066] depressurizing valve 11

[0067] plug valve 12

[0068] hydraulic cylinder 13

[0069] telescopic rod 14

[0070] cooling device 15

[0071] tank 16

[0072] cooling layer 17 DETAILED DESCRIPTION

[0073] The present application will be further described by way of example with reference to the accompanying drawings, but the present application is not limited to the described examples. The experimental methods in the following examples, for which no specific conditions are indicated, are carried out according to conventional methods and conditions, or according to the instructions of the commercial suppliers.

[0074] Example 1

[0075] This example provides a cooling device. Figure 1 is a perspective view of the cooling system of this example; Figure 2 is a front view of the cooling system of this example; Figure 3 is a left side view of the cooling system of this example; Figure 4 is a top view of the cooling system of this example;

[0076] The cooling system comprises:

[0077] The chamber is composed of a first chamber 1 and a second chamber 2 which are mutually through in the material conveying direction; the height of the first chamber 1 is less than that of the second chamber 2; two feeding holes are arranged on the top of the end of the first chamber 1 close to the second chamber 2, the arrangement direction of the feeding holes on the top of the first chamber 1 is perpendicular to the material conveying direction, a material guiding cylinder 7 is arranged above the feeding holes, the material guiding cylinder 7 is in inverted Y shape, the diameter is 400 mm, and the material guiding cylinder 7 comprises one feeding port and two discharging ports, the two discharging ports correspond to the above two feeding holes respectively; a plug valve 12 is arranged at the end of the second chamber 2 away from the first chamber 1, for discharging and sealing; the second chamber 2 is provided with a pressurizing valve 10 and a decompressing valve 11; a baffle 8 is arranged in the chamber in the vertical direction, the baffle 8 is arranged downstream of the feeding holes in the material conveying direction, for flattening the material in the conveying process; the bottom of the baffle 8 is in sawtooth shape, the length of the sawtooth is 10 mm; the baffle 8 is located in the interior of the second chamber 2 close to the first chamber 1; the baffle 8 is connected to an extension rod 14 arranged on the inner surface of the top of the chamber, the extension rod 14 is used for controlling the up and down movement of the baffle 8 in the vertical direction; two sealing windows 3 are arranged on the side of the first chamber 1; two sealing windows 3 are arranged on the side of the second chamber 2.

[0078] The collecting device is a collecting groove 4 with the length, width and height of 4000 mm, 1500 mm and 250 mm respectively, and the starting position is located in the interior of the first chamber 1; the collecting device is provided with a water cooling unit comprising a cooling water pipeline, which is arranged in the interior of the collecting device and comprises a water inlet pipe 5 and a water outlet pipe 6.

[0079] The conveying device is located at the bottom of the chamber and comprises a guide rail 9; the guide rail 9 is located on the inner bottom surface of the chamber, for conveying the collecting device in the material conveying direction.

[0080] The bottom of the collecting groove 4 is further attached with a hydraulic cylinder 13; the hydraulic cylinder 13 can move to the second chamber with the collecting groove, for lifting one side of the collecting device after the material is cooled, so as to realize the pouring of the material.

[0081] The sum of the lengths of the first chamber 1 and the second chamber 2 is 8500 mm, wherein the length of the first chamber is 4300 mm, and the length of the second chamber is 4200 mm; the width of the first chamber 1 and the second chamber 2 is 2000 mm; the height of the first chamber 1 is 1000 mm, and the height of the second chamber 2 is 2000 mm.

[0082] The inlet end of the cooling system is connected with the discharging port of the smelting device; the outlet end of the cooling system is connected with the inlet end of the hydrogen breaking device.

[0083] Example 2

[0084] The reaction material of the embodiment is composed of PrNd (30.9%), B (0.98%), Fe (64.39%), Cu (0.2%), Dy (0.7%), Ho (0.5%), Nb (0.2%), Al (0.5%), Co (1.5%), and Ca (0.13%), wherein the percentages are the mass percentages of the components in the total material.

[0085] The embodiment discloses a preparation process of a rapid solidification alloy sheet. The preparation of the rapid solidification alloy sheet comprises a melting casting step and a cooling step.

[0086] In the melting casting step, the reaction material is first put into a medium-frequency induction vacuum melting furnace, and leak detection and vacuumization are performed, the gas pressure in the furnace is ≤15 Pa, the power of the melting furnace is 200 KW, then argon is filled into the melting furnace, the power of the melting furnace is 400 KW when the material is melted, and then refining is performed at 1480 °C, and casting and strip casting are performed at 1420 °C.

[0087] In the cooling step, the cooling device of the embodiment 1 is used, and the cooling device specifically comprises the following steps:

[0088] S1, the collecting tank 4 is provided with a cooling device, cooling water is supplied into the collecting tank 4 at a flow rate of 41 m 3 / h, the water temperature in the water inlet pipe 5 is less than 35 °C, two feeding holes are formed in the top of the first chamber 1, the alloy sheet is added into the collecting tank 4 through the inverted Y-shaped guide cylinder 7, and the alloy sheet is divided into two piles;

[0089] The alloy sheet is added into the collecting tank 4 of the first chamber 1, so that the bulk density of the alloy sheet is 2.72 g / cm 3 , and a total of 4 t of alloy sheet can be collected; the baffle 8 inside the second chamber 2 arranged in the vertical direction close to one side of the first chamber 1 is moved downward through the extension rod 14, at this time, the distance between the baffle 8 and the bottom of the collecting tank 4 is 45 mm, and the weight of the alloy sheet that can be laid flat in the collecting tank 4 is 750 Kg, in actual operation, the weight of the alloy sheet per furnace is 650 Kg, so as to prevent the alloy sheet in a certain space in the collecting tank 4 from being too thick and causing uneven cooling;

[0090] S2, after the alloy sheet is completely added into the collecting tank 4, the collecting tank 4 is moved into the second chamber 2 at a speed of 4.87 mm / s, under the action of the baffle 8, the cooled material is uniformly laid in the collecting tank 4, and then the baffle 8 is moved upward;

[0091] S3, open the pressurizing valve 10, fill argon into the second chamber 2 until the pressure reaches 70±10kPa, use argon to cool, open the vacuum valve after 0.5h to 2kPa, take away heat, replace every 0.5h, cool for 30min under the protection of gas, then reduce the pressure of the second chamber 2 to 2kPa through the pressure reducing valve 11, the cooling time is 1-1.5h, the temperature of the quenched alloy sheet after cooling is less than 50℃;

[0092] S4, after the cooling is completed, the transport equipment removes 1500mm from the second chamber 2, and prepares to discharge; open the hydraulic cylinder attached to the bottom of the collection tank 4, and the collection tank 4 is lifted by the hydraulic cylinder 13 at a lifting speed of 1.8mm / s, and the discharge is completed.

[0093] The rapidly solidified alloy sheet obtained by the above cooling method is used for the production of magnets.

[0094] The magnet is prepared by using a method conventional in the art, specifically including the following steps:

[0095] 1, the quenched alloy sheet prepared above is placed in a hydrogen decrepitation furnace, hydrogen is introduced, and after the product is completely hydrogenated, the temperature is raised to 550℃ for dehydrogenation for more than 6h, and cooled for more than 4h to obtain a broken hydrogen decrepitation powder. The hydrogen decrepitation powder is ground in a high-purity nitrogen gas flow mill under the protection of high-purity nitrogen gas, and the average particle size D50 (laser particle size tester) of the powder is controlled to be between 3.8-4.1μm. The ground powder is mixed uniformly in a stainless steel bottle under the protection of high-purity nitrogen gas, and a protective agent accounting for 0.08% of the weight of the powder is added during mixing. The protective agent can be a lubricant for increasing the flowability of the particles, so as to facilitate subsequent compression molding, and then stirring for 4h to ensure uniform mixing.

[0096] 2, the sample forming press is used to press a compact, the orientation magnetic field strength is >1.4T, and the compact is subjected to isostatic pressing at a pressure of 180MPa;

[0097] 3, after sintering treatment, the sintering degassing section ends and the sintering section starts, the vacuum degree is controlled to be <1Pa, the sintering temperature is 1050℃, the first aging is 900℃, and the second aging is 500℃, to obtain a magnet.

[0098] Comparative Example 1

[0099] This comparative example uses the same reactants as Example 2, and the operations other than the cooling step are the same as those of Example 2. Among them, the operation of cooling is that after the neodymium iron boron alloy sheet is melted and cast, a conventional cooling method in the art is used, i.e. the alloy sheet is cooled in a water tank with water at room temperature, and then the alloy sheet is taken out after the water tank is cooled to room temperature. Figure 5The alloy sheet is cooled in the cooling device 15 for cooling the alloy sheet shown. The cooling device 15 includes a tank body 16 and a cooling layer 17 arranged on the periphery of the tank body 16, and circulating water is passed through the cooling layer 17. The alloy sheet stacked in the tank body 16 is cooled under vacuum condition in the tank body 16 to prepare the rapidly solidified alloy sheet, and the cooling is performed for more than 4 hours. The rapidly solidified alloy sheet obtained by the cooling method is used to prepare the magnet, and the preparation method is the same as that of Example 2.

[0100] Effect example

[0101] (1) Ne-rich phase distribution test

[0102] ① Test method

[0103] The rapidly solidified alloy sheets prepared in Example 2 and Comparative Example 1 are subjected to ne-rich phase distribution analysis by using a scanning electron microscope (SEM) in the art.

[0104] ② Test result

[0105] Figure 6 The ne-rich phase distribution diagram of the rapidly solidified alloy sheet prepared in Example 2 is shown. It can be seen from the diagram that the product subjected to the cooling treatment of air cooling and water cooling has uniformly distributed ne-rich phase, and the secondary grains are refined;

[0106] Figure 7 The ne-rich phase distribution diagram of the rapidly solidified alloy sheet prepared in Comparative Example 1 is shown. It can be seen from the diagram that the product has coarse dendrites due to slow cooling, and the ne-rich phase appears to be agglomerated.

[0107] (2) Intrinsic coercivity (Hcj) test

[0108] ① Test method

[0109] The final magnet of Example 2 and the final magnet of Comparative Example 1 cut into a cylindrical shape with a diameter of 10 mm and a height of 10 mm are subjected to intrinsic coercivity test by using a NIM direct current magnetic field magnetometer.

[0110] ② Test result

[0111] Compared with the intrinsic coercivity of the final magnet of Comparative Example 1, the intrinsic coercivity of the magnet obtained in the application is increased by 0.3 kOe. It can be seen that the rapidly solidified alloy sheet prepared by using the cooling system and the cooling method of the application not only has uniformly distributed ne-rich phase, but also the magnet further prepared from the rapidly solidified alloy sheet has higher intrinsic coercivity.

Claims

1. A cooling system, characterized by, It comprises: a chamber, which comprises a first chamber and a second chamber arranged along the material conveying direction and penetrating each other; two feeding holes are opened on the top of the first chamber near one end of the second chamber; a guide cylinder is installed above the feeding holes; the guide cylinder is inverted Y-shaped, comprising one feeding port and two discharging ports; a baffle is arranged in the interior of the chamber along the vertical direction, which is arranged downstream of the feeding holes along the material conveying direction, and is used for flattening the material during the conveying process; the bottom of the baffle is zigzag-shaped; the baffle is located in the interior of the second chamber near the side of the first chamber; a plug valve is arranged at the end of the second chamber away from the first chamber, which is used for discharging and sealing; the second chamber is provided with a pressurizing valve and a depressurizing valve; a collecting device, the starting position of which is located in the interior of the first chamber; the collecting device is provided with a water cooling unit; a conveying device, which is located at the bottom of the chamber, and is used for conveying the collecting device along the material conveying direction.

2. The cooling system of claim 1, wherein, The height of the first chamber is less than the height of the second chamber; and / or, the water cooling unit comprises a cooling water pipeline; and / or, the arrangement direction of the two feeding holes on the top of the first chamber is perpendicular to the material conveying direction; and / or, the length of the zigzag is 10 mm; and / or, the baffle is connected to an extension rod arranged on the lower surface of the top of the chamber or the inner surface of the side wall, and the extension rod is used for controlling the up-and-down movement of the baffle in the vertical direction.

3. The cooling system of claim 2, wherein, The cooling water pipeline is arranged at the bottom, side wall or interior of the collecting device.

4. The cooling system of claim 1, wherein, The conveying device comprises a guide rail; the guide rail is located on the inner bottom surface of the chamber; and / or, the side surface of the chamber is provided with a plurality of sealing windows; and / or, the collecting device comprises a collecting groove.

5. The cooling system of claim 4, wherein, The side surface of the first chamber is provided with 2 sealing windows; and / or, the side surface of the second chamber is provided with 2 sealing windows.

6. The cooling system of claim 4, wherein, The bottom of the collecting groove is further attached with a hydraulic cylinder, which is used for lifting one side of the collecting device after the material is cooled, so as to realize the pouring of the material.

7. Cooling system according to any of claims 1-6, characterized in that The inlet end of the cooling system is connected with the discharging port of a smelting device; and / or, the outlet end of the cooling system is connected with the inlet end of a hydrogen breaking device.

8. A cooling method characterized by, It adopts the cooling system according to any one of claims 1-7, and comprises the following steps: S1, adding the material to be cooled into the collecting device through the feeding holes for water cooling; S2, conveying the collecting device from the first chamber to the second chamber through the conveying device; S3, introducing and discharging protective gas into and out of the second chamber through the pressurizing valve and the depressurizing valve respectively for air cooling, the air cooling time is 0.5-2 h, and a rapid solidification alloy sheet is obtained; wherein, step S1 is prior to step S2.

9. The cooling method of claim 8, wherein, In step S1 the bulk density of the material to be cooled in the collecting device is 2.5-2.9 g / cm3 3 ; And / or, the collecting device is provided with a cooling water pipeline, the water flow in the cooling water pipeline is 30-50 m 3 / h, and the water temperature in the cooling water pipeline is less than 35℃. and / or, two feeding holes are opened on the top of the first chamber, and the two discharging ports of the inverted Y-shaped guide cylinder are respectively inserted into the two feeding holes, and the material to be cooled is added into the collecting device through the inverted Y-shaped guide cylinder. And / or, the baffle inside the second chamber near the first chamber is moved downward by the telescopic rod when the material to be cooled is added.

10. The cooling method of claim 8, wherein, In step S1 the bulk density of the material to be cooled in the collecting device is 2.72 g / cm3 3 .

11. The cooling method of claim 9, wherein, In step S2, the conveying speed of the conveying device is 4.5-5.0 mm / s; And / or, the baffle is moved upward by the telescopic rod after the material to be cooled is uniformly distributed in the collecting device.

12. The cooling method of claim 9, wherein, In step S2, the conveying speed of the conveying device is 4.87 mm / s.

13. The cooling method of claim 8, wherein, In step S3, the protective gas comprises argon; And / or, the second chamber is pressurized to 60-80 kPa by the pressurizing valve; And / or, the second chamber is depressurized to 2 kPa by the depressurizing valve after the protective gas is cooled for 30 min; And / or, the time for air cooling is 1-1.5 h; And / or, the temperature of the rapid-setting alloy sheet is less than 50℃; And / or, the hydraulic cylinder attached to the bottom of the collecting device is opened to transfer the rapid-setting alloy sheet after the air cooling is completed.

14. A rapid-solidifying alloy sheet, characterized in that, The rapid-setting alloy sheet is prepared by the cooling method according to any one of claims 8-13.

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