Titanium alloy double-chamber casting and hot isostatic pressing device

Abstract

The embodiment of the invention provides a titanium alloy double-chamber casting and hot isostatic pressing device which comprises a furnace body, an isolation door, a vacuum consumable electrode, a crucible, a first transmission assembly, a second transmission assembly, a vacuumizing assembly and a pressurizing assembly, and a pouring area and a hot pressing area are arranged in the furnace body; the isolation door is arranged in the furnace body and can selectively separate the pouring area and the hot pressing area. The vacuum consumable electrode is arranged on the furnace body; the crucible is arranged in the pouring area and located below the vacuum consumable electrode, and the vacuum consumable electrode and the crucible are used for smelting titanium alloy solids to enable the titanium alloy solids to become titanium alloy molten metal. The vacuumizing assembly communicates with the side, provided with the pouring area, of the furnace body, a negative pressure environment is created, and impurities generated by oxidation in the molten metal pouring process are avoided. The pressurizing assembly communicates with the side, provided with the hot-pressing area, of the furnace body and is used for pressurizing the side, provided with the hot-pressing area, of the furnace body, hot isostatic pressing treatment is conducted, and the casting performance is improved.

Description

Technical Field

[0001] The present application relates to the technical field of material casting, and in particular to a titanium alloy double-chamber casting and hot isostatic pressing device. Background Art

[0002] Titanium alloys have the characteristics of high specific strength, impact resistance, corrosion resistance, and good heat resistance, and are widely used in weapon equipment, aviation industry, shipbuilding industry, nuclear industry, marine engineering, etc. As the performance requirements of various equipment become higher and higher, the performance requirements of titanium alloy cylindrical parts are correspondingly increased.

[0003] In the casting process of titanium alloy castings, titanium in the molten state is particularly sensitive to interstitial elements hydrogen, oxygen and nitrogen, which will react chemically with commonly used refractory materials. The vacuum consumable electrode arc shell furnace is the most commonly used titanium alloy melting and casting equipment in the titanium casting industry. The vacuum environment can significantly improve the overall quality and performance of titanium ingot castings, and effectively reduce the adverse effects caused by common defects such as pores and inclusions.

[0004] For metal materials, hot isostatic pressing technology can densify the formed castings through temperature and pressure. After hot isostatic pressing of titanium alloy castings, the alloy microstructure changes, the shrinkage cavities, shrinkage porosity and pores in the castings are cured, and the casting performance is greatly improved.

[0005] However, the prior art lacks a casting device capable of performing hot isostatic pressing on titanium or titanium alloy castings. Summary of the invention

[0006] The embodiment of the present application provides a titanium alloy double-chamber casting and hot isostatic pressing device to improve the casting quality and performance of titanium alloy castings.

[0007] The embodiment of the present application provides a titanium alloy double-chamber casting and hot isostatic pressing device, comprising:

[0008] A furnace body, which has a pouring area and a hot pressing area inside;

[0009] An isolation door, disposed in the furnace body, capable of selectively separating the pouring area and the hot pressing area;

[0010] A vacuum consumable electrode is arranged on the furnace body and is used for melting titanium alloy;

[0011] A crucible, arranged in the casting area and below the vacuum consumable electrode, the crucible being used for melting titanium alloy solid;

[0012] A first transmission assembly, disposed in the pouring area and below the crucible, for moving the casting mold;

[0013] A second transmission assembly is disposed in the hot pressing area, and the second transmission assembly is used to move the casting mold;

[0014] A vacuum pumping assembly is connected to a side of the furnace body provided with the pouring area;

[0015] A pressurizing assembly is communicated with a side of the furnace body where the hot pressing area is disposed.

[0016] In a feasible implementation, the titanium alloy dual-chamber casting and hot isostatic pressing device further includes a first lifting assembly;

[0017] The first lifting assembly is disposed in the casting area, the first lifting assembly is connected to the first transmission assembly, and the first lifting assembly is used to lift the first transmission assembly.

[0018] In a feasible implementation, the titanium alloy dual-chamber casting and hot isostatic pressing device further includes a second lifting assembly;

[0019] The second lifting assembly is disposed in the hot pressing area, the second lifting assembly is connected to the second transmission assembly, and the second lifting assembly is used to lift the second transmission assembly.

[0020] In a feasible implementation, the first transmission assembly is configured as a transmission roller assembly.

[0021] In a feasible implementation, the second transmission assembly is configured as a transmission roller assembly.

[0022] In a feasible implementation, the furnace body is provided with an observation window, and the material of the observation window is configured as a transparent material.

[0023] In a feasible implementation, the vacuum pump assembly includes a pressure pump, which is connected to one side of the hot pressing area of ​​the furnace body through a pipeline, and the pressure pump is used to adjust the vacuum degree of one side of the hot pressing area in the furnace body.

[0024] In a feasible implementation, there are multiple first lifting assemblies and multiple second lifting assemblies, and the multiple first lifting assemblies are distributed below the first transmission assembly;

[0025] A plurality of the second lifting assemblies are distributed below the second transmission assembly.

[0026] In a feasible implementation, the titanium alloy dual-chamber casting and hot isostatic pressing device further includes a pouring cup, and the pouring cup is arranged below the crucible.

[0027] The embodiment of the present application provides a titanium alloy double-chamber casting and hot isostatic pressing device, including a furnace body, an isolation door, a vacuum consumable electrode, a crucible, a first transmission assembly, a second transmission assembly, a vacuum assembly and a pressurizing assembly, wherein a pouring area and a hot pressing area are provided inside the furnace body; the isolation door is arranged in the furnace body, and can selectively separate the pouring area and the hot pressing area. The vacuum consumable electrode is arranged on the furnace body; the crucible is arranged in the pouring area and is located below the vacuum consumable electrode, and the vacuum consumable electrode and the crucible are used to melt the titanium alloy solid to turn it into titanium alloy molten metal.

[0028] The titanium alloy molten metal is poured into the mold of the casting box in the pouring area. The first transmission assembly is arranged in the pouring area and below the crucible, and is used to move the mold; the second transmission assembly is arranged in the hot pressing area; the first transmission assembly moves the poured mold to the second transmission assembly. The vacuum assembly is connected to the side of the furnace body where the pouring area is provided to create a negative pressure environment to avoid oxidation and impurities during the pouring of the molten metal. The pressurizing assembly is connected to the side of the furnace body where the hot pressing area is provided to pressurize one side of the hot pressing area of ​​the furnace body to perform hot isostatic pressing treatment to improve the performance of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0030] In the attached picture:

[0031] Figure 1 It is a structural schematic diagram of a titanium alloy double-chamber casting and hot isostatic pressing device provided in one embodiment of the present application.

[0032] Description of reference numerals:

[0033] 100-furnace body; 200-isolation door; 300-vacuum consumable electrode; 400-crucible; 500-first transmission assembly; 600-second transmission assembly; 700-vacuum assembly; 800-first lifting assembly; 900-second lifting assembly; 1000-pouring cup; 1100-box. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0035] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] Titanium alloys have the characteristics of high specific strength, impact resistance, corrosion resistance, and good heat resistance, and are widely used in weapon equipment, aviation industry, shipbuilding industry, nuclear industry, marine engineering, etc. As the performance requirements of various equipment become higher and higher, the performance requirements of titanium alloy cylindrical parts are correspondingly increased.

[0038] In the casting process of titanium alloy castings, titanium in the molten state is particularly sensitive to interstitial elements hydrogen, oxygen and nitrogen, which will react chemically with commonly used refractory materials. The vacuum consumable electrode arc shell furnace is the most commonly used titanium alloy melting and casting equipment in the titanium casting industry. The vacuum environment can significantly improve the overall quality and performance of titanium ingot castings, and effectively reduce the adverse effects caused by common defects such as pores and inclusions.

[0039] For metal materials, hot isostatic pressing technology can densify the formed castings through temperature and pressure. After hot isostatic pressing of titanium alloy castings, the alloy microstructure changes, the shrinkage cavities, shrinkage porosity and pores in the castings are cured, and the casting performance is greatly improved.

[0040] However, the prior art lacks a casting device capable of performing hot isostatic pressing on titanium or titanium alloy castings.

[0041] In order to solve the above problems, an embodiment of the present application provides a titanium alloy dual-chamber casting and hot isostatic pressing device. The solution provided in the embodiment of the present application will be described in detail below in conjunction with the drawings in the specification.

[0042] A schematic structural diagram of a titanium alloy dual-chamber casting and hot isostatic pressing device provided in one embodiment of the present application.

[0043] Figure 1 It is a structural schematic diagram of a titanium alloy double-chamber casting and hot isostatic pressing device provided in one embodiment of the present application.

[0044] Reference Figure 1 As shown, the embodiment of the present application provides a titanium alloy double-chamber casting and hot isostatic pressing device, including a furnace body 100, an isolation door 200, a vacuum consumable electrode 300, a crucible 400, a first transmission assembly 500, a second transmission assembly 600, a vacuum assembly 700 and a pressurizing assembly, wherein a pouring area and a hot pressing area are provided inside the furnace body 100; the isolation door 200 is arranged in the furnace body 100, and can selectively separate the pouring area and the hot pressing area. The vacuum consumable electrode 300 is arranged on the furnace body 100; the crucible 400 is arranged in the pouring area and is located below the vacuum consumable electrode 300, and the vacuum consumable electrode 300 and the crucible 400 are used to melt the titanium alloy solid to turn it into titanium alloy metal liquid. It should be noted that the crucible 400 is a water-cooled copper crucible 400, and the vacuum consumable electrode 300 and the crucible 400 are used for vacuum arc melting. During smelting, the vacuum consumable electrode 300 and the water-cooled crucible 400 are connected to the negative electrode and the positive electrode of the power source respectively, and the molten metal flows into the water-cooled copper crucible 400 .

[0045] The water-cooled copper crucible 400 is tilted, and the titanium alloy liquid therein is poured into the mold of the casting box 1100 in the pouring area. The first transmission assembly 500 is arranged in the pouring area and is located below the crucible 400, and is used to move the mold; the second transmission assembly 600 is arranged in the hot pressing area; the first transmission assembly 500 moves the mold after pouring to the second transmission assembly 600. The vacuum assembly 700 is connected to the side of the furnace body 100 where the pouring area is provided to create a negative pressure environment to avoid oxidation and impurities during the pouring of the molten metal. The pressurizing assembly is connected to the side of the furnace body 100 where the hot pressing area is provided to pressurize one side of the hot pressing area of ​​the furnace body 100 to perform hot isostatic pressing treatment to improve the performance of the casting.

[0046] Exemplarily, both the first transmission assembly 500 and the second transmission assembly 600 may be configured as transmission roller assemblies.

[0047] Continue to refer to Figure 1As shown, in some examples, the titanium alloy dual-chamber casting and hot isostatic pressing device further includes a first lifting assembly 800. The first lifting assembly 800 is arranged in the pouring area, and the first lifting assembly 800 is connected to the first transmission assembly 500. The first lifting assembly 800 is used to lift the first transmission assembly 500, so as to adjust the height of the box 1100 on the first transmission assembly 500, so as to facilitate the pouring of molten metal into the mold in the box 1100. After the pouring of the molten metal is completed, the first lifting assembly 800 lowers the height of the first transmission assembly 500 to lower the height of the box 1100, so as to facilitate its transfer to the second transmission assembly 600. In some examples, there are multiple first lifting assemblies 800, and multiple first lifting assemblies 800 are arranged under the first transmission assembly 500. Multiple first lifting assemblies 800 are lifted and lowered at the same time to control the lifting and lowering of the first transmission assembly 500.

[0048] In some other examples, the titanium alloy dual-chamber casting and hot isostatic pressing device further includes a second lifting assembly 900. The second lifting assembly 900 is disposed in the hot pressing area, the second lifting assembly 900 is connected to the second transmission assembly 600, and the second lifting assembly 900 is used to lift the second transmission assembly 600. Similarly, the second lifting assembly 900 has a plurality of second lifting assemblies 900, and the plurality of second lifting assemblies 900 are disposed under the second transmission assembly 600, and the plurality of second lifting assemblies 900 are lifted and lowered simultaneously to ensure that the second transmission assembly 600 is lifted and lowered stably.

[0049] For example, in some examples, the furnace body 100 is provided with an observation window, and the material of the observation window is configured as a transparent material for observing the melting of the titanium alloy metal. When the melting reaches the marked weight, the arc observer issues an instruction to stop the arc pouring, and flips the crucible 400 to pour the molten metal into the casting mold.

[0050] The vacuum assembly 700 includes a pressure pump, which is connected to one side of the hot pressing area of ​​the furnace body 100 through a pipeline, and the pressure pump is used to adjust the vacuum degree of one side of the hot pressing area in the furnace body 100. When smelting titanium alloy, the furnace is first vacuumed by using a pressure pump to make the internal pressure less than or equal to 1 Pa. In some examples, the pressurizing assembly also has a pressure pump for pressurizing and delivering pressurized gas, such as argon, into the furnace body 100. This is a prior art and will not be described in detail here.

[0051] In order to conveniently pour the molten metal in the crucible 400 into the casting mold of the box 1100, the titanium alloy double-chamber casting and hot isostatic pressing device further includes a pouring cup 1000, which is arranged below the crucible 400. When the crucible 400 is tilted, the molten metal in the crucible 400 flows through the pouring cup 1000 into the casting mold.

[0052] After the molten metal in the crucible 400 is poured into the mold, wait for the mold to drop to 950°C, and the first lifting assembly 800 controls the first transmission assembly 500 to descend. At this time, the mold is separated from the pouring cup 1000, and the isolation door 200 is opened. The first transmission assembly 500 transports the mold to the second transmission assembly 600 in the hot pressing area of ​​the furnace body 100 for hot isostatic pressing treatment.

[0053] After the casting mold is transferred to the hot pressing area, the isolation door 200 is closed, and the pressurizing assembly begins to pressurize and fill the hot pressing area of ​​the furnace body 100 with argon gas at a pressure of 100 to 140 MPa. After keeping warm for 2h to 2.5h, the furnace is cooled to below 300°C.

[0054] Finally, the pouring area and the hot pressing area in the furnace body 100 are restored to normal pressure, the furnace door is opened, the casting is taken out, and the casting is cleaned at the same time.

[0055] The titanium alloy double-chamber casting and hot isostatic pressing device provided in the present application has a simple structure and high production efficiency. During the production operation, the isolation door 200 divides the internal cavity of the furnace body 100 into two independent areas. The mold can be cooled to a certain temperature after the pouring area is completed. The first lifting assembly 800 descends in height to separate the mold from the pouring cup 1000. The first transmission assembly 500 transports the mold to the second transmission assembly 600 located in the hot pressing area, and then closes the isolation door 200 and pressurizes it to perform the hot isostatic pressing process, which simplifies the smelting pouring and hot pressing processes and shortens the production cycle of castings.

[0056] In addition, hot isostatic pressing is carried out by utilizing the residual temperature of the casting during pouring, thereby eliminating the heating step in the hot pressing process and saving production costs.

[0057] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0058] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A titanium alloy double-chamber casting and hot isostatic pressing device, characterized in that: include: A furnace body (100) is provided with a pouring area and a hot pressing area inside; An isolation door (200) is disposed in the furnace body (100) and can selectively separate the pouring area and the hot pressing area; A vacuum consumable electrode (300) is arranged on the furnace body (100) and is used for melting titanium alloy; A crucible (400) is arranged in the casting area and below the vacuum consumable electrode (300), and the crucible (400) is used for melting titanium alloy solid; A first transmission assembly (500), arranged in the pouring area and below the crucible (400), for moving the casting mold; A second transmission assembly (600), arranged in the hot pressing area, the second transmission assembly (600) being used to move the casting mold; A vacuum pumping assembly (700) is connected to a side of the furnace body (100) where the pouring area is provided; A pressurizing assembly is communicated with a side of the furnace body (100) where the hot pressing area is provided.

2. The titanium alloy double-chamber casting and hot isostatic pressing device according to claim 1, characterized in that: The titanium alloy double-chamber casting and hot isostatic pressing device further comprises a first lifting assembly (800); The first lifting component (800) is arranged in the pouring area, the first lifting component (800) is connected to the first transmission component (500), and the first lifting component (800) is used to lift the first transmission component (500).

3. The titanium alloy double-chamber casting and hot isostatic pressing device according to claim 2, characterized in that: The titanium alloy double-chamber casting and hot isostatic pressing device further comprises a second lifting assembly (900); The second lifting assembly (900) is arranged in the hot pressing area, the second lifting assembly (900) is connected to the second transmission assembly (600), and the second lifting assembly (900) is used to lift the second transmission assembly (600).

4. The titanium alloy double-chamber casting and hot isostatic pressing device according to claim 1, characterized in that: The first transmission assembly (500) is configured as a transmission roller assembly.

5. The titanium alloy double-chamber casting and hot isostatic pressing device according to claim 1, characterized in that: The second transmission assembly (600) is configured as a transmission roller assembly.

6. The titanium alloy double-chamber casting and hot isostatic pressing device according to claim 1, characterized in that: The furnace body (100) is provided with an observation window, and the material of the observation window is configured as a transparent material.

7. The titanium alloy double-chamber casting and hot isostatic pressing device according to claim 1, characterized in that: The vacuum pump assembly (700) comprises a pressure pump, which is connected to one side of the hot pressing area of ​​the furnace body (100) through a pipeline, and the pressure pump is used to adjust the vacuum degree of one side of the hot pressing area in the furnace body (100).

8. The titanium alloy double-chamber casting and hot isostatic pressing device according to claim 3, characterized in that: The first lifting assembly (800) and the second lifting assembly (900) are both in plurality, and the plurality of first lifting assemblies (800) are distributed below the first transmission assembly (500); A plurality of the second lifting assemblies (900) are distributed below the second transmission assembly (600).

9. The titanium alloy double-chamber casting and hot isostatic pressing device according to claim 1, characterized in that: The titanium alloy dual-chamber casting and hot isostatic pressing device further comprises a pouring cup (1000), and the pouring cup (1000) is arranged below the crucible (400).

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