Rare earth steel anti-oxidation protective casting device

Abstract

The utility model relates to the technical field of anti-oxidation of rare earth steel, in particular to an anti-oxidation protective casting device for rare earth steel, which is characterized by comprising a casting box body which is a closed box body with a through hole array at the bottom; the inert gas conveyors are respectively inserted into the through hole arrays in a sealed manner; wherein the pouring box body comprises an air outlet; each inert gas conveyor is composed of a columnar exhaust hood with the hemispherical top, a plurality of air pressure valves arranged in the middle and at the bottom of the exhaust hood and an air inlet connector. The exhaust hood is provided with an exhaust through hole array arranged at equal intervals, the air pressure valve corresponds to the air bin of the exhaust hood, and the air inlet connector is installed at the bottom of the exhaust hood. And the casting safety is reduced, the material loss in the casting process is reduced, and the production efficiency is improved, so that the problems that the oxidation in the casting process cannot be effectively prevented and the continuous casting production of the rare earth steel with strong oxidizing property cannot be maintained in the casting of the rare earth steel are further solved.

Description

Technical Field

[0001] The utility model relates to the field of rare earth steel anti-oxidation, in particular to a rare earth steel anti-oxidation protection casting device. Background Art

[0002] Rare earth steel is steel containing a certain amount of rare earth elements. The rare earth elements mentioned here refer to the lanthanide elements with atomic numbers 57 to 71 in the periodic table, as well as yttrium and scandium, a total of 17 elements.

[0003] The addition of rare earth elements to steel improves its performance, including deep drawing, corrosion resistance, wear resistance, and drawability. In recent years, theoretical research and applied technology for rare earth steel have rapidly advanced. Numerous steel companies and research institutions are optimizing and upgrading steel performance through rare earth treatment, making rare earth steel a major avenue of innovation within the steel industry.

[0004] Chinese patent authorization announcement number: CN111705264A, discloses a rare earth steel and a preparation method thereof. The components of the rare earth steel include, by mass percentage: C: 0.01% to 0.05%, Si: 0.15% to 0.3%, Mn: 0.4% to 0.5%, Cr: 8% to 10%, W: 2% to 2.5%, V: 0.2% to 0.25%, Ta: 0.05% to 0.1%, Zr: 0.001% to 0.01%, Y2O3: 0.3% to 0.6%, and the remainder is Fe; During preparation, Cr, W, Ta, Fe, Si, Mn, and Y are smelted into a metal mother liquid. A mixed gas of CO2 and Ar is then introduced into the alloy mother liquid as an oxidant to oxidize Y to Y2O3. Zr, V, and C are then added, melted, and then cast. The ingot is electroslag remelted under a protective atmosphere for purification. The purified ingot is austenitized and then press-formed into a steel plate, which is then water-cooled. The press-formed steel plate is heat-treated to precipitate yttrium nano-precipitates in the steel plate, thereby obtaining the rare earth steel. The present invention can produce RAFM steel through smelting and casting, thereby increasing the yield of RAFM steel and improving the high-temperature mechanical properties of the RAFM steel.

[0005] Chinese Patent Authorization Announcement No.: CN219130740U discloses an anti-oxidation device for aluminum-lithium alloy casting, the structure of which includes: an anti-oxidation cavity and a cover plate; the anti-oxidation cavity is a hollow cavity with open upper and lower ends, and at least two clamps are provided in the hollow cavity, and the clamps are vertically connected to the inner wall of the hollow cavity; the cover plate is assembled on the anti-oxidation cavity, and a casting port and an air vent are provided on the cover plate, the casting port is a long strip through hole, and the air vent is a circular through hole, and the air vent is connected to the inert protective gas supply device through a gas supply pipe. Before casting, argon gas is introduced through the circular air vent above the cover plate to remove the air in the casting mold, and argon gas is continuously introduced during the casting process to prevent the aluminum-lithium alloy from oxidizing during the casting process. This device can be used to prepare aluminum-lithium alloys with no oxide inclusions, dense structure, qualified and stable composition, which improves the stability of the aluminum-lithium alloy structure and performance, and is simple and convenient to operate.

[0006] However, the above method has the following problems: the casting of rare earth steel in the prior art cannot effectively prevent oxidation during the casting process, and cannot maintain continuous casting to produce rare earth steel with strong oxidizing properties. Utility Model Content

[0007] Therefore, the present invention provides a rare earth steel anti-oxidation protection casting device to overcome the problem in the prior art that rare earth steel casting cannot effectively prevent oxidation during the casting process and cannot maintain continuous casting to produce highly oxidizable rare earth steel.

[0008] To achieve the above-mentioned purpose, the present invention provides a rare earth steel anti-oxidation protection casting device, comprising:

[0009] A casting box is configured as a closed box with an array of through holes at the bottom;

[0010] A plurality of inert gas conveyors are respectively and hermetically inserted on the through-hole array, and each inert gas conveyor and the casting box form a closed space inside the box;

[0011] Wherein, the casting box includes an air outlet;

[0012] A single inert gas conveyor is composed of a cylindrical exhaust hood with a hemispherical top, a plurality of air pressure valves arranged in the middle and bottom of the exhaust hood, and an air inlet joint;

[0013] The exhaust hood is provided with an array of exhaust through holes arranged at equal intervals, the air pressure valve corresponds to the air chamber of the exhaust hood, and the air inlet joint is installed at the bottom of the exhaust hood.

[0014] Furthermore, a plurality of flexible baffles are provided in the exhaust hood;

[0015] For a single flexible baffle, it is configured as an arc-shaped structure connected to the air inlet connector, and each arc-shaped structure and the corresponding air pressure valve configure the exhaust hood as a plurality of air chambers.

[0016] Furthermore, the inert gas conveyor conveys argon, nitrogen or helium.

[0017] Furthermore, the air outlet is installed on the top of the conveying box and can be circular, quadrilateral or polygonal.

[0018] Furthermore, the flexible baffle may be made of rubber.

[0019] Furthermore, the exhaust through-holes can be divided into a first matrix exhaust through-hole, a second matrix exhaust through-hole and a third matrix exhaust through-hole.

[0020] Furthermore, the ratio of the exhaust through-holes in the first matrix, the exhaust through-holes in the second matrix, and the exhaust through-holes in the third matrix is ​​5:3:2.

[0021] Furthermore, the exhaust hood is a cylinder, a cone, a cuboid or any three-dimensional structure.

[0022] Furthermore, the gas conveyors are evenly distributed on the bottom side of the box.

[0023] Furthermore, the casting box is completely sealed, the air inlet joint is connected to an argon gas bottle, and the air outlet is connected to an exhaust gas collector.

[0024] Compared with the prior art, the beneficial effect of the present invention is that argon is delivered to the box through an inert gas conveyor, thereby preventing rare earth steel from being oxidized by oxygen during the casting process, reducing the safety of casting, reducing material loss during the casting process, and improving production efficiency, thereby overcoming the problem that the casting of rare earth steel cannot effectively prevent oxidation during the casting process and cannot maintain continuous casting to produce rare earth steel with strong oxidizing properties.

[0025] Furthermore, by switching the flexible baffle and the air pressure valve, the argon is ensured to be evenly distributed in the exhaust hood, which facilitates the uniform removal of argon through the exhaust holes, ensuring that the argon is fully distributed in the casting device, thereby further overcoming the problem that the casting of rare earth steel cannot effectively prevent oxidation during the casting process and cannot maintain continuous casting to produce rare earth steel with strong oxidizing properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the rare earth steel anti-oxidation protection casting device of the utility model;

[0027] Figure 2 This is a structural diagram of the inert gas conveyor of the rare earth steel anti-oxidation protection casting device of the utility model;

[0028] Figure 3 This is a diagram of the usage status of the rare earth steel anti-oxidation protection casting device according to an embodiment of the utility model.

[0029] Among them, the box body 1, the exhaust cover 2, the air pressure valve 3, the air inlet connector 4, the flexible baffle 5, the air outlet 6, and the exhaust through hole 21. DETAILED DESCRIPTION

[0030] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0032] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] See also Figure 1 , which is a structural diagram of the rare earth steel anti-oxidation protection casting device of the utility model;

[0035] Please combine Figure 1 See Figure 2 , which is a structural diagram of the inert gas conveyor of the rare earth steel anti-oxidation protection casting device of the present utility model;

[0036] Please combine Figure 1 See Figure 3 , which is a diagram of the use state of the rare earth steel anti-oxidation protection casting device according to an embodiment of the present utility model;

[0037] The present invention provides a rare earth steel anti-oxidation protection casting device, comprising:

[0038] A casting box is configured as a closed box with an array of through holes at the bottom;

[0039] A plurality of inert gas conveyors are respectively and sealedly inserted into the through-hole array, and each inert gas conveyor and the casting box form a closed space inside the box;

[0040] Wherein, the casting box includes an air outlet;

[0041] A single inert gas conveyor is composed of a cylindrical exhaust hood with a hemispherical top, a plurality of air pressure valves arranged in the middle and bottom of the exhaust hood, and an air inlet joint;

[0042] The exhaust hood is provided with an array of exhaust through holes arranged at equal intervals. The air pressure valve corresponds to the air chamber of the exhaust hood, and the air inlet joint is installed at the bottom of the exhaust hood.

[0043] Specifically, a number of flexible baffles are provided in the exhaust hood;

[0044] For a single flexible baffle, it is configured as an arc-shaped structure connected to the air inlet connector, and each arc-shaped structure and the corresponding air pressure valve configure the exhaust hood as a plurality of air chambers.

[0045] Argon is delivered to the box 1 through an inert gas conveyor, which prevents the rare earth steel from being oxidized by oxygen during the casting process, reduces the safety of casting, reduces the loss of material during casting, and improves production efficiency, thereby overcoming the problem that the casting of rare earth steel cannot effectively prevent oxidation during the casting process and cannot maintain continuous casting to produce rare earth steel with strong oxidizing properties.

[0046] Specifically, the inert gas conveyor conveys argon, nitrogen or helium.

[0047] Specifically, the air outlet is installed on the top of the conveying box and can be circular, quadrilateral or polygonal.

[0048] Specifically, the flexible baffle 5 can be made of rubber and switch between a first working state and a second working state; when the air inlet connector 4 is delivering gas to the exhaust hood 2, the flexible baffle 5 is in the second working state, and when the air inlet connector 4 stops delivering gas, the flexible baffle 5 is in the first working state.

[0049] Specifically, the exhaust through-holes can be further divided into a first matrix exhaust through-hole, a second matrix exhaust through-hole and a third matrix exhaust through-hole.

[0050] Specifically, the ratio of the exhaust through holes in the first matrix, the exhaust through holes in the second matrix, and the exhaust through holes in the third matrix is ​​5:3:2.

[0051] Specifically, the exhaust hood is a cylinder, a cone, a cuboid or any three-dimensional structure.

[0052] During implementation, the gas outlet 6 is an inert gas conveyor for conveying argon gas. The gas outlet 6 is circular, the exhaust hood 2 is cylindrical, the gas inlet joint 4 is connected to the argon gas bottle and conveys argon gas into the exhaust hood. When the pressure in the exhaust hood reaches the critical value, the air pressure valve opens, and the argon gas enters the box body 1 from the exhaust hole 21 of the exhaust hood. At the same time, the gas outlet 6 conveys the gas discharged from the box body to the waste gas collector. When the argon content in the box body 1 reaches 97%, it can effectively protect the rare earth steel from oxidation casting.

[0053] Specifically, the gas conveyors are evenly distributed on the bottom side of the box.

[0054] Specifically, the casting box is completely sealed, the air inlet joint is connected to the argon gas bottle, and the air outlet is connected to the exhaust gas collector.

[0055] By switching the flexible baffle 5, the argon is ensured to be evenly distributed in the exhaust hood 2, and the argon is evenly discharged through the exhaust through hole 21, ensuring that the argon is fully distributed in the casting device, thereby further overcoming the problem that the casting of rare earth steel cannot effectively prevent oxidation during the casting process and cannot maintain continuous casting to produce rare earth steel with strong oxidizing properties.

[0056] During implementation, the inert gas conveyor is fixed to the bottom of the box body 1 so that the inert gas conveyor can convey argon into the box body 1. When the argon enters the exhaust hood 2 through the air inlet connector 4, the argon enters the exhaust hood 2 and squeezes upward. When the air pressure in the first bin reaches a critical value, the flexible baffle 5 opens, and the argon enters the second exhaust bin. When the air pressure in the second exhaust bin reaches a critical value, the flexible baffle 5 opens, and the argon enters the third exhaust bin. When the argon is evenly distributed in all exhaust bins, the exhaust hood 2 conveys argon into the box body 1 through the exhaust through-hole 21. After a period of time, the argon content in the box body 1 reaches the standard, which can effectively protect the rare earth steel from oxidation casting. When the exhaust hood 2 conveys argon into the box body 1, the outlet 6 on the top side of the box body 1 conveys excess gas to the outside to ensure the circulation of argon in the box body 1.

[0057] The first matrix of exhaust holes is evenly distributed in the first exhaust chamber, the second matrix of exhaust holes is evenly distributed in the second exhaust chamber, and the third matrix of exhaust holes is evenly distributed in the third exhaust chamber. The inert gas conveyor can control the opening and closing of the first matrix of exhaust holes, the second matrix of exhaust holes, and the third matrix of exhaust holes according to the situation to achieve the desired inert gas delivery efficiency.

[0058] During implementation, when the air pressure in the first exhaust chamber reaches a critical value, the air pressure valve opens and argon enters the second exhaust chamber. When the air pressure in the second exhaust chamber reaches a critical value, the first matrix exhaust holes and the second matrix exhaust holes open, and inert gas is transported from the first matrix exhaust holes and the second matrix exhaust holes to the box body 1. After a period of time, the argon content in the box body 1 reaches the standard, which can effectively protect the rare earth steel from oxidation casting. When the exhaust hood 2 transports argon into the box body 1, the outlet 6 on the top side of the box body 1 transports excess gas to the outside to ensure the circulation of argon in the box body 1.

[0059] When the air pressure in the first exhaust chamber reaches 150Pa, the air pressure valve opens and argon enters the second exhaust chamber. When the air pressure in the second exhaust chamber reaches 150Pa, the air pressure valve is not opened, allowing argon to enter the third exhaust chamber. At this time, due to continuous ventilation, the air pressure continues to rise. When the air pressure reaches 200Pa, the first matrix exhaust holes and the second matrix exhaust holes are opened, and argon is transported from the first matrix exhaust holes and the second matrix exhaust holes to the box body 1. When the argon content in the box body 1 reaches 97%, it can effectively protect the rare earth steel from oxidation after casting. When the exhaust hood 2 transports argon into the box body 1, the outlet 6 on the top side of the box body 1 transports excess gas to the outside, and the transport rate is related to the discharge efficiency of the exhaust holes.

[0060] When the air pressure in the first exhaust chamber reaches 100Pa, the air pressure valve opens and argon enters the second exhaust chamber. When the air pressure in the second exhaust chamber reaches 100Pa, the air pressure valve opens and argon enters the third exhaust chamber. When the air pressure in the third exhaust chamber reaches 150Pa, the first matrix exhaust holes, the second matrix exhaust holes and the third matrix exhaust holes are opened, and argon is transported from the exhaust holes to the box body 1. When the argon content in the box body 1 reaches 97%, it can effectively protect the rare earth steel from oxidation after casting. When the exhaust hood 2 transports argon into the box body 1, the outlet 6 on the top side of the box body 1 transports excess gas to the outside, and the transport rate is related to the discharge efficiency of the exhaust holes.

[0061] It is understandable that the number of exhaust bins in the exhaust hood is related to the delivery power of the inert gas conveyor, and those skilled in the art can select it according to actual conditions, which will not be elaborated here.

[0062] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A rare earth steel anti-oxidation protection casting device, characterized in that: include: A casting box is configured as a closed box with an array of through holes at the bottom; A plurality of inert gas conveyors are respectively and hermetically inserted on the through-hole array, and each inert gas conveyor and the casting box form a closed space inside the box; Wherein, the casting box includes an air outlet; A single inert gas conveyor is composed of a cylindrical exhaust hood with a hemispherical top, a plurality of air pressure valves arranged in the middle and bottom of the exhaust hood, and an air inlet joint; The exhaust hood is provided with an array of exhaust through holes arranged at equal intervals, the air pressure valve corresponds to the air chamber of the exhaust hood, and the air inlet joint is installed at the bottom of the exhaust hood.

2. The rare earth steel anti-oxidation protection casting device according to claim 1, characterized in that: A plurality of flexible baffles are provided in the exhaust hood; For a single flexible baffle, it is configured as an arc-shaped structure connected to the air inlet connector, and each arc-shaped structure and the corresponding air pressure valve configure the exhaust hood as a plurality of air chambers.

3. The rare earth steel anti-oxidation protection casting device according to claim 2, characterized in that: The inert gas conveyor conveys argon, nitrogen or helium.

4. The rare earth steel anti-oxidation protection casting device according to claim 3, characterized in that: The air outlet is installed on the top of the conveying box and can be circular, quadrilateral or polygonal.

5. The rare earth steel anti-oxidation protection casting device according to claim 4, characterized in that: The flexible baffle may be made of rubber.

6. The rare earth steel anti-oxidation protection casting device according to claim 5, characterized in that: The exhaust through-holes can also be divided into a first matrix exhaust through-hole, a second matrix exhaust through-hole and a third matrix exhaust through-hole.

7. The rare earth steel anti-oxidation protection casting device according to claim 6, characterized in that: The ratio of the first matrix exhaust through-holes, the second matrix exhaust through-holes and the third matrix exhaust through-holes is 5:3:

2.

8. The rare earth steel anti-oxidation protection casting device according to claim 7, characterized in that: The exhaust hood is a cylinder, a cone or a cuboid.

9. The rare earth steel anti-oxidation protection casting device according to claim 8, characterized in that: The gas conveyors are evenly distributed on the bottom side of the box.

10. The rare earth steel anti-oxidation protection casting device according to claim 9, characterized in that: The casting box is completely sealed, the air inlet joint is connected to an argon gas bottle, and the air outlet is connected to an exhaust gas collector.

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