Crucible for preparing AlV55 alloy

Abstract

The utility model discloses a crucible for preparing AlV55 alloy. The crucible comprises a crucible body and a hearth arranged in the crucible body. The hearth is a cavity which is formed by the crucible body and is provided with an opening, and is used for containing a substance to be prepared; wherein the hearth comprises an upper hearth and a lower hearth which are communicated with each other; the upper hearth is a cylindrical cavity with a V-shaped vertical section, and the lower hearth is a bowl-shaped cavity with an arc-shaped vertical section; one end of the upper hearth is an opening of the crucible body, and the other end of the upper hearth is connected with the lower hearth. According to the graphite crucible for the smelting furnace for preparing the AlV55 alloy, the side face of the hearth in the vertical direction is of a big-end-up structure, so that alloy cakes in the furnace are convenient to pour out, and furnace disassembling operation is convenient; the bottom of the hearth is of a circular-arc-shaped bowl-shaped structure, so that gas formed by furnace charge reaction can migrate and gather towards the side face in the molten metal sinking process, and visible air holes are prevented from being formed in the alloy bottom or in the alloy.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical equipment, in particular to a graphite crucible used in a smelting furnace for preparing AlV55 alloy. Background Art

[0002] Vanadium in titanium alloy is added in the form of vanadium aluminum alloy. AlV55 alloy is mainly used to prepare Ti-6Al-4V. Since the vanadium content in AlV55 alloy is generally 57wt%-60wt%, it is in the peritectic reaction zone where the vanadium content of vanadium aluminum alloy is 42wt%-62wt%. When the temperature of producing AlV55 alloy is reduced to 1670℃, the volume fraction of Al8V5 brittle phase generated is greater than the volume fraction of V phase, which will cause a large number of cracks, oxidation and nitride film defects to form inside the alloy, affecting the apparent quality of the product. In the current production of AlV55 alloy, graphite materials with good thermal conductivity and heat storage properties are generally selected as the working layer of the smelting furnace. Through rapid heat conduction, the high-temperature AlV55 alloy quickly passes through the peritectic reaction temperature range, thereby inhibiting the generation of Al8V5 brittle phase and reducing alloy oxidation and nitride film defects.

[0003] The prior art (application number 202321078115.3) discloses a graphite crucible for a carbonization furnace, which relates to the technical field of graphite crucibles, including a support ring, a threaded barrel, a connecting screw, a hollow ring, a graphite crucible body, etc., which is composed of multiple groups of connection methods to achieve the adjustment of the distance between the bottom of the graphite crucible body and the carbonization furnace, so as to achieve the effect of uniform heating of the graphite crucible body by the carbonization furnace, and can reduce the heating time of the graphite crucible on the object to avoid fuel waste. The prior art (application number 202321376232.8) also discloses a spliced ​​graphite crucible, which relates to the technical field of graphite crucibles, including a splicing plate, a connecting seat, a graphite seal, and a graphite top ring. It is connected and fixed in a variety of ways, which facilitates the disassembly of the splicing plate and makes the spliced ​​graphite crucible more convenient to use. After checking the literature, the graphite crucible has not yet involved the field of metallurgical equipment technology.

[0004] At present, the graphite layer of the AlV55 alloy smelting furnace is generally composed of graphite plates assembled, and the furnace chamber is a flat-bottomed, straight-cylinder structure. Its advantage is that it is convenient to dismantle the furnace, but there are at least the following disadvantages: First, the assembly of graphite plates is complicated and labor-intensive; second, the flat-bottomed furnace bottom causes the vapor generated by the molten ash and low-melting-point metal in the charge reaction to only penetrate the alloy liquid and be discharged upward, with a long migration path, which makes it easy for pores to accumulate at the bottom of the alloy and form shrinkage pores or penetrating pores inside.

[0005] Based on this, the existing technology still needs to be improved. Utility Model Content

[0006] In order to solve the above technical problems, the utility model embodiment provides a graphite crucible for a smelting furnace for preparing AlV55 alloy. The utility model is convenient to dismantle the crucible for preparing AlV55 alloy, simple to operate, and conducive to guiding pore migration.

[0007] On the one hand, a crucible for preparing AlV55 alloy disclosed in an embodiment of the present invention comprises:

[0008] The crucible body, and

[0009] A furnace disposed in the crucible body, the furnace forming a cavity with an opening for the crucible body, for containing a substance to be prepared;

[0010] Among them, the furnace chamber includes an upper furnace chamber and a lower furnace chamber which are interconnected; the upper furnace chamber is a cylindrical cavity with a V-shaped vertical cross-section, and the lower furnace chamber is a bowl-shaped cavity with a circular arc vertical cross-section; one end of the upper furnace chamber is the opening of the crucible body, and the other end of the upper furnace chamber is connected to the lower furnace chamber.

[0011] In a preferred embodiment, the maximum diameter R2 of the transverse cross section of the upper furnace is greater than the maximum diameter R3 of the transverse cross section of the lower furnace.

[0012] In a preferred embodiment, R2:R3≥1.1:1.

[0013] In a preferred embodiment, the crucible body is a cylinder with a uniform diameter.

[0014] In a preferred embodiment, the ratio of the diameter R1 of the crucible body to the maximum diameter R2 of the transverse cross section of the upper furnace is R1:R2≥1.3:1.

[0015] In a preferred embodiment, the ratio of the vertical height H1 of the upper furnace to the vertical height H2 of the lower furnace is H1:H2≤4:1.

[0016] In a preferred embodiment, the base of the crucible is the portion of the crucible body located at the lower part of the furnace, and the vertical height of the base is designed such that the ratio of the vertical height of the furnace to the vertical height of the base is ≤5:1.

[0017] In a preferred embodiment, the crucible body is made of graphite.

[0018] In a preferred embodiment, the crucible is disposed in an AlV55 alloy smelting furnace and is used as a working layer of the smelting furnace to allow the high-temperature AlV55 alloy to quickly pass through a peritectic reaction temperature range.

[0019] In a preferred embodiment, the crucible body is an integral structure formed in one piece.

[0020] By adopting the above technical solution, the utility model has at least the following beneficial effects:

[0021] The side surface in the vertical direction of the furnace of the graphite crucible used in the smelting furnace for preparing AlV55 alloy provided by the utility model is a structure of being larger at the top and smaller at the bottom, so that the alloy cakes in the furnace are easy to pour out and the furnace dismantling operation is convenient.

[0022] The bottom of the furnace of the graphite crucible used in the smelting furnace for preparing AlV55 alloy provided by the utility model is an arc-shaped bowl-shaped structure, which is conducive to the migration and aggregation of gases formed by the reaction of furnace charge to the side during the sinking of molten metal, thereby avoiding the formation of visible pores at the bottom or inside of the alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The utility model discloses a side structural cross-sectional schematic diagram of a graphite crucible used in a smelting furnace for preparing AlV55 alloy according to an embodiment of the present invention.

[0025] Reference numerals list

[0026] 1-crucible body; 2-upper furnace; 3-lower furnace;

[0027] H-vertical direction; W-lateral direction; DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0029] The scope of applicability of the preferred embodiment will become apparent through the following detailed description and the accompanying drawings. It should be understood that although the description and specific examples point out the preferred embodiments of the utility model, the description and specific examples are given only by way of example. Different variations and modifications of the described embodiments and examples will be apparent to those skilled in the art.

[0030] In the following description, certain aspects and embodiments will be apparent. It should be understood that, broadly speaking, the present invention can be implemented without one or more features of these aspects and embodiments. It should be understood that these aspects and embodiments are merely exemplary and explanatory and are not intended to limit the present invention.

[0031] Although the following detailed description refers to illustrative embodiments, many alternatives, modifications and variations thereof will be apparent to those skilled in the art. Therefore, the subject matter claimed is to be construed in a broader sense.

[0032] like Figure 1 As shown, some embodiments of the utility model disclose a graphite crucible for a smelting furnace for preparing AlV55 alloy. Figure 1 As shown in , the vertical cross section described in this embodiment is a cross section along the vertical direction H, that is, a direction perpendicular to the crucible; the transverse cross section described in this embodiment is a cross section along the transverse direction W, that is, a direction perpendicular to the vertical direction H.

[0033] The crucible is arranged in the AlV55 alloy smelting furnace and is used as the working layer of the smelting furnace to enable the high-temperature AlV55 alloy to quickly pass through the peritectic reaction temperature range.

[0034] Figure 1 The crucible for preparing AlV55 alloy shown includes: a crucible body 1 and a furnace arranged in the crucible body 1. The furnace is an arc-shaped structure with a larger top and a smaller bottom. The crucible body 1 is a cylinder with a uniform diameter. In a preferred embodiment, the material of the crucible body 1 is graphite.

[0035] Graphite crucible refers to a type of crucible made of graphite, clay, silica and wax stone. Graphite crucible has good thermal conductivity and has a certain resistance to rapid heating and cooling during high-temperature use. It is widely used in the smelting of non-ferrous metals and their alloys.

[0036] The furnace chamber is a cavity with an opening formed by the crucible body 1 for containing the material to be prepared, such as alloy cakes and slag.

[0037] The furnace includes an upper furnace 2 and a lower furnace 3 which are interconnected; the upper furnace 2 is a cylindrical cavity with a V-shaped vertical section, and the lower furnace 3 is a bowl-shaped cavity with a circular arc vertical section; one end of the upper furnace 2 is the opening of the crucible body 1, and the other end of the upper furnace 2 is connected to the lower furnace 3. Figure 1 As shown, the upper furnace 2 is specifically a cylindrical cavity with a portion of a V-shaped vertical cross section, that is, a cylinder that is larger at the top and smaller at the bottom.

[0038] The maximum diameter R2 of the transverse section of the upper furnace 2 is greater than the maximum diameter R3 of the transverse section of the lower furnace 3. Among them, R2: R3 ≥ 1.1: 1. The purpose of this setting is to make the furnace structure larger at the top and smaller at the bottom, so that the slag and alloy cake can be easily flipped out of the crucible wall and the furnace can be easily dismantled.

[0039] The ratio of the diameter R1 of the crucible body 1 to the maximum diameter R2 of the transverse section of the upper furnace 2 is R1:R2≥1.3:1. The purpose of this setting is to control the thickness of the graphite crucible wall, increase the strength of the graphite crucible wall, and avoid mechanical damage to the graphite crucible wall during the furnace dismantling operation.

[0040] The ratio of the vertical height H1 of the upper furnace 2 to the vertical height H2 of the lower furnace 3 is H1:H2≤4:1. The purpose of this setting is to control the height of the lower furnace 3, effectively promote the gas formed by the charge reaction to migrate and gather to the side during the sinking of the molten metal, and avoid the formation of visible pores at the bottom or inside of the alloy.

[0041] The present application defines the ratio of the transverse diameters and the vertical heights of the upper furnace chamber 2 and the lower furnace chamber 3 of the crucible, and also defines the inclination angle of the V-shaped vertical section of the upper furnace chamber 2 and the curvature of the bowl-shaped cavity of the lower furnace chamber 3. This ensures that the slag and alloy cakes in the furnace chamber at a specific angle can be smoothly flipped out from the crucible wall, and compared with a flat-bottomed furnace chamber, it can effectively promote the migration and aggregation of gases formed by the charge reaction to the sides during the sinking of the molten metal.

[0042] The base of the crucible is the part of the crucible body 1 located at the lower part of the furnace, and the vertical height of the base is designed to be the ratio of the vertical height of the furnace (i.e. the sum of the vertical height H1 of the upper furnace 2 and the vertical height H2 of the lower furnace 3) to the vertical height H3 of the base ≤ 5: 1. The purpose of this setting is to control the height of the base of the crucible, ensure that there is a large enough graphite body to absorb and store heat, inhibit the formation of Al8V5 brittle phase, and reduce the defects of alloy oxidation and nitridation film.

[0043] The crucible body 1 is an integral structure formed in one piece; the crucible adopts an integral structure except for the furnace, and there is no need to assemble the graphite crucible plate, which simplifies the operation.

[0044] The utility model discloses a graphite crucible for preparing AlV55 alloy, which is convenient to dismantle, simple to operate and conducive to guiding pore migration. It has strong practical application value for improving the preparation efficiency of AlV55 alloy smelting furnace, improving product appearance quality and yield rate index, and preparing multi-component alloy smelting furnace.

[0045] The bottom of the furnace of the crucible for preparing AlV55 alloy of the utility model is an arc-shaped structure, that is, the lower furnace 3 of the bowl-shaped cavity, which is conducive to the gas formed by the reaction of the charge to migrate and gather to the side during the sinking of the molten metal, avoiding the formation of visible pores at the bottom or inside of the alloy.

[0046] It should be pointed out in particular that the various components or steps in the above-mentioned embodiments can be cross-linked, replaced, added, or deleted with each other. Therefore, the combinations formed by these reasonable arrangements and combinations should also fall within the scope of protection of the present utility model, and the scope of protection of the present utility model should not be limited to the embodiments.

[0047] The above are exemplary embodiments disclosed in the present utility model. The order disclosed in the above embodiments of the present utility model is only for description and does not represent the advantages and disadvantages of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope (including claims) disclosed in the embodiments of the present utility model is limited to these examples. Various changes and modifications may be made without departing from the scope defined in the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. In addition, although the elements disclosed in the embodiments of the present utility model may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0048] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A crucible for preparing AlV55 alloy, characterized in that: The crucible comprises: The crucible body, and A furnace disposed in the crucible body, the furnace being a cavity with an opening formed by the crucible body for containing a substance to be prepared; Among them, the furnace chamber includes an upper furnace chamber and a lower furnace chamber which are interconnected; the upper furnace chamber is a cylindrical cavity with a V-shaped vertical cross-section, and the lower furnace chamber is a bowl-shaped cavity with a circular arc vertical cross-section; one end of the upper furnace chamber is the opening of the crucible body, and the other end of the upper furnace chamber is connected to the lower furnace chamber.

2. The crucible for preparing AlV55 alloy according to claim 1, characterized in that: The maximum diameter R2 of the transverse cross section of the upper furnace is greater than the maximum diameter R3 of the transverse cross section of the lower furnace.

3. The crucible for preparing AlV55 alloy according to claim 1, characterized in that: R2:R3≥1.1:

1.

4. The crucible for preparing AlV55 alloy according to claim 1, characterized in that: The crucible body is a cylinder with a uniform diameter.

5. The crucible for preparing AlV55 alloy according to claim 4, characterized in that: The ratio of the diameter R1 of the crucible body to the maximum diameter R2 of the transverse cross section of the upper furnace is R1:R2≥1.3:

1.

6. The crucible for preparing AlV55 alloy according to claim 1, characterized in that: The ratio of the vertical height H1 of the upper furnace to the vertical height H2 of the lower furnace is H1:H2≤4:

1.

7. The crucible for preparing AlV55 alloy according to claim 4, characterized in that: The base of the crucible is the part of the crucible body located at the lower part of the furnace, and the vertical height of the base is designed so that the ratio of the vertical height of the furnace to the vertical height of the base is ≤5:

1.

8. The crucible for preparing AlV55 alloy according to claim 1, characterized in that: The material of the crucible body is graphite.

9. The crucible for preparing AlV55 alloy according to claim 8, characterized in that: The crucible is arranged in the AlV55 alloy smelting furnace and is used as a working layer of the smelting furnace to enable the high-temperature AlV55 alloy to quickly pass through the peritectic reaction temperature range.

10. The crucible for preparing AlV55 alloy according to claim 1, characterized in that: The crucible body is an integral structure formed in one piece.

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