A rapid cooling nanocrystalline steel ingot mold device

Abstract

The present application relates to the technical field of metallurgy, and discloses a kind of fast cooling nanocrystalline steel ingot mould device, comprising: including: steel ingot mould body, liquid cooling bottom plate and air cooling device;Wherein, steel ingot mould body includes mould, mould is used to accommodate high-temperature steel liquid for forming parent alloy;Liquid cooling bottom plate is installed at the bottom of steel ingot mould body, and cooling liquid is circulated inside liquid cooling bottom plate;Air cooling device can discharge cold air to realize the cooling of parent alloy surface.This fast cooling nanocrystalline steel ingot mould device, when high-temperature steel liquid is poured into mould, since cooling liquid is circulated inside liquid cooling bottom plate, and liquid cooling bottom plate is installed at the bottom of steel ingot mould body, then cooling liquid can realize the cooling of steel ingot mould body;When high-temperature steel liquid shell, air cooling device can be started, and cold air is discharged to the surface of parent alloy, to further cool down.This setting mode can improve the cooling speed of nanocrystalline parent alloy, improve the service life of mould, and at the same time guarantee the quality of product.

Description

Technical Field

[0001] This invention relates to the field of metallurgical technology, and in particular to a device for rapidly cooling nanocrystalline steel ingot molds. Background Technology

[0002] Iron-based nanocrystalline alloys typically contain a large number of amorphous forming elements. These amorphous forming elements are prone to compositional segregation at grain boundaries during cooling, leading to instability in the performance of subsequent nanocrystalline products. Therefore, a high cooling rate is required when casting the master alloy to achieve uniform composition.

[0003] Conventional steel ingot molds typically involve pouring molten steel into each mold, removing it after the master alloy has solidified, and then reusing the mold. During the cooling process of the molten steel, a large amount of heat released by the metal's cooling and solidification is absorbed by the ingot mold itself. After absorption, the heat is conducted into the air through thermal radiation. The heat exchange rate is slow, so the temperature of the ingot mold is relatively high. In particular, the parts in contact with the molten steel are prone to adhesion, scratches, and chipping. This not only seriously affects the service life of the ingot mold but also affects the quality of the solidified product.

[0004] Therefore, how to improve the cooling rate of nanocrystalline master alloys has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid cooling nanocrystalline steel ingot mold device, which can improve the cooling rate of nanocrystalline master alloy, extend the service life of the mold, and ensure product quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A rapid cooling nanocrystalline steel ingot mold device includes: a steel ingot mold body, a liquid cooling base plate, and an air cooling device; wherein, the steel ingot mold body includes a mold for containing high-temperature molten steel for forming a master alloy; the liquid cooling base plate is installed at the bottom of the steel ingot mold body, and coolant flows inside the liquid cooling base plate; the air cooling device can exhaust cold air to cool the surface of the master alloy.

[0008] In this rapid cooling nanocrystalline steel ingot mold device, when high-temperature molten steel is poured into the mold, the cooling liquid flows inside the liquid-cooled base plate and is installed at the bottom of the steel ingot mold body, so the cooling liquid can cool the steel ingot mold body. After the high-temperature molten steel solidifies, the air-cooling device can be activated to discharge cold air from the surface of the master alloy for further cooling.

[0009] This setup can improve the cooling rate of the nanocrystalline master alloy, extend the service life of the mold, and ensure product quality.

[0010] Optionally, the rapid cooling nanocrystalline steel ingot mold device also includes a casting plate; the steel ingot mold body also includes a frame, and there are multiple molds installed on the frame; the casting plate is detachably installed on the side of the frame away from the liquid cooling base plate, the casting plate has a flow channel, and the flow channel has multiple steel outlets, and the multiple steel outlets are set one-to-one with the multiple molds; in any pair of corresponding steel outlets and molds: the mold is connected to the flow channel through the steel outlet.

[0011] Optionally, the frame is provided with multiple rows of modules arranged along the first direction, and each row of modules has two molds; the flow channel extends along the first direction, and the two molds in each row of modules are located on both sides of the flow channel.

[0012] Optionally, the flow channel has a partition plate; the partition plate is used to divide the flow channel into multiple casting zones in a first direction, and the multiple casting zones are set one-to-one with multiple rows of modules; in any pair of corresponding casting zones and modules: the casting zone is provided with two steel outlets, and each steel outlet is set with a mold in the module.

[0013] Optionally, each mold is rotatably connected to the edge of the frame via a pivot; the pivot extends along a first direction.

[0014] Optionally, the liquid-cooled base plate includes a copper plate, an inlet pipe, and an outlet pipe; the copper plate has a cooling pipe inside for allowing coolant to circulate, and the outlet pipe is connected to the inlet pipe through the cooling pipe, with the cooling pipe corresponding to the bottom of the steel ingot mold body.

[0015] Optionally, the cooling pipeline includes: a water distribution tank connected to the liquid inlet pipe; a water collection tank connected to the liquid outlet pipe; and multiple branch pipes connected at both ends to the water distribution tank and the water collection tank respectively.

[0016] Optionally, the liquid-cooled base plate also includes a steel plate; the steel plate is mounted on the outer surface of the copper plate.

[0017] Optionally, the air-cooling device includes an air-cooling shroud, a gas pipeline, and an air compressor; the air-cooling shroud is connected to the air compressor via the gas pipeline, and the air compressor is used to output cold air; the air-cooling shroud is located on the side of the steel ingot mold body away from the liquid-cooled base plate, and the air-cooling shroud is provided with multiple air outlets for discharging cold air.

[0018] Optionally, the fast-cooling nanocrystalline steel ingot mold device also includes a moving device and a driving device; the steel ingot mold body and the liquid-cooled base plate are both mounted on the moving device; the moving device has rollers, and the driving device is used to drive the rollers to move the moving device so that the steel ingot mold body can be aligned with the gate of the melting furnace. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0020] Figure 1 This is a schematic diagram of the assembly of the steel casting plate and the steel ingot mold body in the fast-cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the steel casting tray in the rapid cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the liquid-cooled base plate in the fast-cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the air-cooled shroud in the fast-cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention;

[0024] Figure 5 This is a partial structural diagram of the fast-cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention when it is fully assembled.

[0025] Icons: 1-Ingot mold body; 2-Liquid cooling base plate; 3-Mold; 4-Steel casting tray; 5-Frame; 6-Runner; 7-Steel outlet; 8-Divider plate; 9-Steel casting area; 10-Lifting ring; 11-Copper plate; 12-Liquid inlet pipe; 13-Liquid outlet pipe; 14-Water distribution trough; 15-Water collection trough; 16-Branch pipe; 17-Steel plate; 18-Air cooling shroud; 19-Air outlet; 20-Roller; 21-Trolley; 22-Workbench. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. Indeed, those skilled in the art will recognize that modifications and variations can be made to the invention without departing from its scope or spirit. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the invention encompass such modifications and variations falling within the scope of the appended claims and their equivalents.

[0027] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected," "linked," and "set up" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0028] Figure 1 This is a schematic diagram of the assembly of the steel casting plate and the steel ingot mold body in the fast-cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the steel casting tray in the rapid cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the liquid-cooled base plate in the fast-cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the air-cooled shroud in the fast-cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention; Figure 5 This is a partial structural diagram of the rapid cooling nanocrystalline steel ingot mold device provided in an embodiment of the present invention when fully assembled; see reference. Figures 1-5 This invention provides a rapid cooling nanocrystalline steel ingot mold device, comprising: a steel ingot mold body 1, a liquid-cooled base plate 2, and an air-cooling device; wherein, the steel ingot mold body 1 includes a mold 3, which is used to contain high-temperature molten steel for forming a master alloy; the liquid-cooled base plate 2 is installed at the bottom of the steel ingot mold body 1, and coolant flows inside the liquid-cooled base plate 2; the air-cooling device can discharge cold air to cool the surface of the master alloy.

[0029] In this embodiment, when the high-temperature molten steel is poured into the mold 3, the cooling liquid flows inside the liquid-cooled base plate 2 and is installed at the bottom of the steel ingot mold body 1, so the cooling liquid can cool the steel ingot mold body 1; when the high-temperature molten steel solidifies, the air-cooling device can be activated to discharge cold air from the surface of the master alloy for further cooling.

[0030] Therefore, this setup can improve the cooling rate of the nanocrystalline master alloy, extend the service life of mold 3, and ensure product quality.

[0031] Specifically, a comparative test was conducted between casting using this fast-cooling nanocrystalline steel ingot mold device and casting using conventional molds. The cooling time of steel ingots cast using conventional casting methods is more than 4 hours, while the cooling time of steel ingots cast using this fast-cooling nanocrystalline steel ingot mold device is about half an hour, which significantly shortens the cooling time, greatly reduces the number of master alloy grains, and significantly shortens the contact time between the mold and the molten steel at high temperatures, thereby effectively improving the service life. In the test, the number of times the mold can be used increased from about 600 times to about 1000 times.

[0032] refer to Figure 1 and Figure 2 As an optional embodiment, the rapid cooling nanocrystalline steel ingot mold device further includes a casting plate 4; the ingot mold body 1 also includes a frame 5, and multiple molds 3 are installed on the frame 5; the casting plate 4 is detachably installed on the side of the frame 5 facing away from the liquid-cooled base plate 2, and the casting plate 4 has a flow channel 6, with multiple steel outlets 7 on the flow channel 6, and the multiple steel outlets 7 are correspondingly arranged with the multiple molds 3; in any pair of corresponding steel outlets 7 and molds 3: the mold 3 is connected to the flow channel 6 through the steel outlet 7. The frame 5 is provided with multiple rows of modules arranged along a first direction, and each row of modules has two molds 3; the flow channel 6 extends along the first direction, and the two molds 3 in each row of modules are located on both sides of the flow channel 6. The flow channel 6 has a partition plate 8; the partition plate 8 is used to divide the flow channel 6 into multiple casting areas 9 in the first direction, and the multiple casting areas 9 are correspondingly arranged with the multiple rows of modules. In any pair of corresponding casting areas 9 and modules: the casting area 9 is provided with two steel outlets 7, and each steel outlet 7 is correspondingly set with a mold 3 in the module.

[0033] In this embodiment, taking the setting of a four-row mold 3 as an example, the pouring process is illustrated as follows:

[0034] First, align one of the pouring zones 9 in the runner 6 with the gate of the smelting furnace. The high-temperature molten steel enters the runner 6 through the gate and then flows into the molds 3 on both sides of the runner 6 through the outlets 7 on both sides of the runner 6, thus completing the pouring. When it is necessary to pour into all molds 3, simply switch the pouring zone 9 aligned with the gate.

[0035] The flow channel and the outlet are both U-shaped, meaning they have a certain depth. This effectively prevents the hot molten steel from splashing out of the flow channel or mold during pouring. At the same time, the U-shaped arc surface facilitates the rapid flow of molten steel, thereby improving pouring efficiency.

[0036] This setup can increase the pouring speed, and the partition plate 8 can prevent high-temperature molten steel from flowing into different pouring zones 9, thereby ensuring the accuracy of pouring.

[0037] As an alternative embodiment, each mold 3 is rotatably connected to the edge of the frame 5 via a pivot; the pivot extends along a first direction.

[0038] In this embodiment, the rotatable connection between the mold 3 and the frame 5 facilitates the collection of the master alloy. For example, a lifting ring 10 can be provided at the end of the mold 3 away from the rotating shaft. Figure 1 As shown, after cooling is complete, the lifting ring 10 can be used to lift the mold 3 and rotate it, so that the master alloy in the mold 3 can be poured directly into the material frame, thereby improving the collection efficiency of the master alloy product.

[0039] In addition, each mold 3 is installed independently on the frame 5 relative to the other molds 3, so that when a mold 3 is damaged, it can be replaced individually, thus saving costs; similarly, the multiple pouring areas 9 of the steel pouring plate 4 can also be set relatively independently, which is also convenient for replacement and saves costs.

[0040] refer to Figure 3 As an optional embodiment, the liquid-cooled base plate 2 includes a copper plate 11, an inlet pipe 12, and an outlet pipe 13; the copper plate 11 has a cooling pipe for allowing coolant to circulate inside, and the outlet pipe 13 is connected to the inlet pipe 12 through the cooling pipe, and the cooling pipe is correspondingly arranged at the bottom of the steel ingot mold body 1.

[0041] The water cooling parameters for the cooling pipes can be set as follows: outlet water pressure 0.1 MPa, water flow rate 50 m³ / h. 3 / min-100m 3 / min

[0042] In this embodiment, the coolant circulates in the cooling pipes. Since the cooling pipes are set to correspond to the bottom of the steel ingot mold body 1, the bottom of the mold 3 will be continuously cooled by the circulating coolant during casting, thereby quickly reducing the temperature and achieving a cooling effect.

[0043] Continue to refer to Figure 3 As an optional embodiment, the cooling pipeline includes: a water distribution tank 14 connected to the liquid inlet pipe 12; a water collection tank 15 connected to the liquid outlet pipe 13; and a plurality of branch pipes 16 connected at both ends to the water distribution tank 14 and the water collection tank 15 respectively.

[0044] In this embodiment, the coolant flows from the inlet pipe into the distribution tank 14, and then into each branch pipe 16. The coolant flowing out of each branch pipe 16 is collected in the collection tank 15, and then flows from the collection tank 15 into the outlet pipe. After being cooled by the cooling tower, the coolant flows back into the inlet pipe. This process is repeated to achieve the effect of circulating cooling.

[0045] In addition, multiple branch pipes 16 can extend along the first direction; thus, the extension direction of the multiple branch pipes 16 is perpendicular to the arrangement direction of each row of modules, and the two cooperate to form a grid structure. The cooling pipes can achieve rapid cooling of the mold. The master alloy in the mold will cause local stress concentration due to the uneven cooling rate in the flow channel and grid position of the grid. Moreover, the nanocrystalline master alloy contains more than 10% metalloid elements and is a brittle alloy. Therefore, under the rapid cooling of the nanocrystalline master alloy, it can naturally split into small chocolate-shaped pieces under stress through the grid structure, which makes it easier to demold the master alloy and collect it later.

[0046] Alternatively, the pipe connecting the water distribution tank 14 and the water collection tank 15 can be made into an S-shaped pipe. The specific shape is not limited, as long as the bottom of the mold 3 is always cooled by the circulating coolant.

[0047] As an optional embodiment, the liquid-cooled base plate 2 also includes a steel plate 17, such as Figure 3 As shown, the steel plate 17 is mounted on the outer surface of the copper plate 11.

[0048] In this embodiment, heat-resistant steel plate 17 can be selected for steel plate 17, thereby improving the strength of liquid-cooled base plate 2; in addition, heat-resistant steel plate 17 can also prevent the copper plate 11 from being damaged or even melted through due to improper operation of high-temperature molten steel splashing out during pouring, thereby further protecting the copper plate 11 and further ensuring safety.

[0049] As an optional embodiment, the air-cooling device includes an air-cooling shroud 18, a gas pipeline, and an air compressor; the air-cooling shroud 18 is connected to the air compressor via the gas pipeline, and the air compressor is used to output cold air; the air-cooling shroud 18 is disposed on the side of the steel ingot mold body 1 facing away from the liquid-cooled base plate 2, and the air-cooling shroud 18 is provided with a plurality of air outlets 19 for discharging cold air, such as... Figure 4 As shown.

[0050] The parameters of the cold air discharged through the air-cooled hood can be set as follows: exhaust pressure 1MPa, exhaust volume 20m³ / h. 3 / min-30m 3 / min

[0051] In this embodiment, after the high-temperature molten steel solidifies, the casting plate 4 can be moved out of the frame 5, and the air-cooling hood 18 can be set on the side of the steel ingot mold body 1 away from the liquid-cooled bottom plate 2. Then, the air compressor is started to deliver cold air to the surface of the master alloy for further cooling.

[0052] As an optional embodiment, the fast-cooling nanocrystalline steel ingot mold device also includes a moving device and a driving device; the steel ingot mold body 1 and the liquid-cooled base plate 2 are both mounted on the moving device; the moving device has rollers 20, and the driving device is used to drive the rollers 20 to move the moving device so that the steel ingot mold body 1 can be aligned with the gate of the melting furnace.

[0053] In this embodiment, please refer to Figure 5 The mobile device can be a trolley 21, which has a worktable 22. The worktable 22 has a hollow cavity, a liquid-cooled base plate 2 is installed in the hollow cavity, the steel ingot mold body 1 is installed on the surface of the worktable 22, and the rollers 20 are located at the bottom of the worktable 22.

[0054] This embodiment only uses the trolley 21 as an example. In addition, the moving device can also be a moving platform with guide rails. The steel ingot mold body 1 and the liquid cooling base plate 2 are both installed on the moving platform. The movement of the moving platform can be achieved by installing guide wheels that cooperate with the guide rails on the moving platform, thereby realizing the movement of the steel ingot mold body 1 on the moving platform on the guide rails. The specific method is not limited, as long as it can make different pouring areas 9 aligned with the gate.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for rapidly cooling nanocrystalline steel ingot molds, characterized in that, include: The steel ingot mold body, liquid-cooled base plate, and air-cooling device; among which... The steel ingot mold body includes a mold for containing high-temperature molten steel for forming a master alloy; The liquid-cooled base plate is installed at the bottom of the steel ingot mold body, and coolant flows inside the liquid-cooled base plate; The air-cooling device can exhaust cold air to cool the surface of the master alloy; The rapid cooling nanocrystalline steel ingot mold device also includes a steel casting tray; The steel ingot mold body also includes a frame, and there are multiple molds installed on the frame; The steel casting plate is detachably installed on the side of the frame away from the liquid-cooled base plate. The steel casting plate has a flow channel with multiple steel outlets, and the multiple steel outlets are set one-to-one with multiple molds. In any pair of corresponding steel outlets and molds: the mold is connected to the flow channel through the steel outlet; The frame is provided with multiple rows of modules arranged along a first direction, and each row of modules has two molds; The flow channel extends along the first direction, and the two molds in each row of modules are located on both sides of the flow channel; The flow channel has a partition plate; The partition plate is used to divide the flow channel into multiple pouring areas in the first direction, and the multiple pouring areas are arranged in a one-to-one correspondence with multiple rows of modules; In any pair of corresponding casting zones and modules: the casting zone is provided with two steel outlets, and each steel outlet is correspondingly provided with a mold in the module; The liquid-cooled base plate includes a copper plate, an inlet pipe, and an outlet pipe; The copper plate has a cooling pipe inside for allowing coolant to circulate. The outlet pipe is connected to the inlet pipe through the cooling pipe. The cooling pipe is correspondingly arranged at the bottom of the steel ingot mold body. The cooling pipeline includes: A water distribution tank connected to the inlet pipe; A water collection tank connected to the outlet pipe; Multiple branch pipes are connected to the water distribution channel and the water collection channel at both ends respectively; the multiple branch pipes extend along a first direction so that the extension direction of the multiple branch pipes is perpendicular to the arrangement direction of each row of modules, and the two cooperate to form a grid structure.

2. The rapid cooling nanocrystalline steel ingot mold device according to claim 1, characterized in that, Each mold is rotatably connected to the edge of the frame via a pivot. The rotating shaft extends along the first direction.

3. The rapid cooling nanocrystalline steel ingot mold device according to claim 1, characterized in that, The liquid-cooled base plate also includes a steel plate; The steel plate is mounted on the outer surface of the copper plate.

4. The rapid cooling nanocrystalline steel ingot mold device according to claim 1, characterized in that, The air-cooling device includes an air-cooling shroud, gas pipes, and an air compressor; The air-cooled shroud is connected to the air compressor via the gas pipe, and the air compressor is used to output cold air. The air-cooled shroud is located on the side of the steel ingot mold body away from the liquid-cooled base plate, and the air-cooled shroud is provided with a plurality of air outlets for discharging cold air.

5. The rapid cooling nanocrystalline steel ingot mold apparatus according to any one of claims 1-4, characterized in that, The rapid cooling nanocrystalline steel ingot mold device also includes a moving device and a driving device; Both the steel ingot mold body and the liquid-cooled base plate are mounted on the moving device; The moving device has rollers, and the driving device is used to drive the rollers to move the moving device so that the ingot mold body can be aligned with the gate of the melting furnace.

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