A control device and control method for carbon composition of high temperature alloy

Abstract

The present invention discloses a control device for the carbon content of a high-temperature alloy and a control method thereof, which relate to the field of 3D printing technology and are used to realize the reuse of recycled powder, save costs, increase the service life of the melting crucible, and control the carbon content in the obtained metal powder. The control device for the carbon content of a high-temperature alloy includes: a melting chamber, a metal component, a vacuum component, and a powder forming device. The control method for the carbon content of a high-temperature alloy includes the control device for the carbon content of a high-temperature alloy proposed in the above technical solution. The control method for the carbon content of a high-temperature alloy provided by the present invention is used to prepare metal powder.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a control device and a control method for the carbon component of a high-temperature alloy. Background Art

[0002] After nearly 30 years of rapid development, 3D printing technology has become one of the most popular advanced manufacturing technologies. In the field of metal 3D printing, metal powder is needed. At present, the particle size range of metal powder prepared by the existing metal powder preparation process is mainly between 0μm and 150μm. The particle size of metal powder used for metal 3D printing is mainly 15μm to 53μm. Coarse powder with a particle size greater than 53μm and ultrafine powder with a particle size less than 15μm can be returned to the furnace for remelting to prepare metal powder. However, due to the light weight of ultrafine powder, it is very easy to be drawn into the vacuum pipeline during the process of returning to the furnace for remelting, thereby damaging the relevant parts of the vacuum pump group and affecting the vacuum effect. In more serious cases, the motor may be burned. Therefore, before the ultrafine powder is returned to the furnace for remelting, it is necessary to melt it into alloy bars before use, or press the ultrafine powder into blocks before use, which increases the use process and cost of ultrafine powder.

[0003] In addition, since carbon blocks need to be added to the crucible during the re-smelting process of coarse powder and ultrafine powder, the carbon component will be partially burned during the vacuum process of the re-smelting, causing the carbon content in the metal powder obtained by the re-smelting to fluctuate greatly. Summary of the invention

[0004] The object of the present invention is to provide a control device and a control method for the carbon content of a high-temperature alloy, which are used to realize the reuse of recycled powder, save costs, increase the service life of the melting crucible, and control the carbon content in the obtained metal powder.

[0005] In a first aspect, the present invention provides a control device for the carbon component of a high-temperature alloy. The control device for the carbon component of a high-temperature alloy comprises: a smelting chamber, a metal component, a vacuum component and a powder forming device. The smelting chamber is used to smelt metal powder raw materials, the metal component is located in the smelting chamber, and the metal component has a containing cavity for containing the cavity material containing carbon and recycled powder. The metal powder raw material includes the metal component and the cavity material, the vacuum component can be disconnected from the containing cavity, and is used to evacuate the containing cavity, and the powder forming device is connected to the smelting chamber.

[0006] Compared with the prior art, the control device for the carbon component of the high-temperature alloy provided by the present invention has a metal component, and the metal component has a containing cavity, and the containing cavity is used to contain the cavity material containing carbon and recycled powder. Since the carbon and recycled powder are contained in the containing cavity of the metal component, during the smelting process of the metal powder raw material in the smelting chamber, the material in the containing cavity of the metal component is gradually melted under the protection of the metal component, thereby avoiding the problem of damage to the vacuum component and waste of raw materials caused by the ultrafine powder and carbon being sucked into the vacuum component. In addition, the vacuum component can be disconnected from the containing cavity, and is used to evacuate the containing cavity, so that the environment in the containing cavity is a vacuum environment, thereby avoiding the introduction of impurity elements such as nitrogen and oxygen into the cavity material in the containing cavity during the melting process, causing the impurity content of the metal powder to increase.

[0007] In a second aspect, the present invention further provides a method for controlling the carbon content of a high-temperature alloy, which is applied to a control device for the carbon content of a high-temperature alloy having a smelting chamber, a metal component, a vacuum component, and a powder forming device, wherein the smelting chamber is used to smelt metal powder raw materials, and the metal component has a receiving cavity. The method for controlling the carbon content of a high-temperature alloy comprises:

[0008] A smelting chamber with a metal component is provided, wherein a cavity of the metal component contains a cavity material containing carbon and recycled powder.

[0009] The accommodating cavity is evacuated by using a vacuum component, so that the interior of the accommodating cavity is a vacuum environment.

[0010] The smelting chamber is evacuated by using a vacuum assembly.

[0011] The metal powder raw material in the smelting chamber is melted into liquid metal by using the smelting chamber, wherein the metal powder raw material comprises at least one or more of the metal component, carbon and recycled powder.

[0012] The metal liquid is atomized by using a powder forming device to obtain metal powder.

[0013] Compared with the prior art, the beneficial effects of the method for controlling the carbon content of a high-temperature alloy provided by the present invention are the same as the beneficial effects of the device for controlling the carbon content of a high-temperature alloy described in the first aspect or any possible implementation of the first aspect, and are not elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a 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 invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1A schematic diagram of the structure of a control device for carbon composition of a high-temperature alloy provided by an embodiment of the present invention;

[0016] Figure 2 A schematic structural diagram of the connection between a metal component and a vacuum assembly provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0020] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] 3D printing technology has unique advantages over traditional casting, machining and other processes. Therefore, it has developed rapidly in recent years, especially in the field of aerospace. In metal 3D printing technology, the metal powder used requires low oxygen and nitrogen content (less than 200ppm). Therefore, the commonly used method for producing the metal powder is vacuum induction gas atomization (VIGA). The production process of metal powder is as follows: first, the metal powder raw material is melted in a medium frequency induction furnace with a melting crucible, and then the molten metal liquid is crushed and atomized into fine droplets by a high-speed jet of inert gas. The fine droplets cool and solidify in flight to become metal powder. In the smelting process of the metal powder raw material, the temperature of the molten metal liquid can reach up to 1600℃~1750℃. At this time, metal powder raw materials with low melting point and active properties (such as silicon blocks, aluminum blocks, sponge titanium, etc.) can be added twice before pouring steel to reduce burning loss. However, since carbon blocks have a lower density than metal liquid and a higher melting point, they will float on the surface of the metal liquid after the second addition and melt slowly. Therefore, they are usually placed directly in the melting crucible, which causes the carbon component to be burned during the vacuum melting process, resulting in large fluctuations in the carbon composition of the final metal powder, making it difficult to achieve narrow carbon composition control.

[0023] In addition, in the vacuum induction gas atomization process (VIGA), the particle size range of the powder discharged from the furnace is mainly between 0μm and 150μm, while the particle size of the metal powder used for 3D printing is mainly between 15μm and 53μm, accounting for about 25% to 35% of the powder discharged from the vacuum induction gas atomization process (VIGA). Coarse powder with a particle size greater than 53μm can be used for re-melting and re-production, while ultrafine powder with a particle size less than 15μm (accounting for about 10% to 15% of the powder discharged from the furnace) is very easy to be drawn into the vacuum pipeline due to its light weight, causing damage to the bearings, rotors and other parts of the vacuum pump group, thereby making the vacuum pumping effect worse. It may even burn the motor, so ultrafine powder is generally not directly used for re-melting. The source of raw materials entering the furnace is reduced, and as production proceeds, ultrafine powder continues to accumulate, which is not conducive to reducing production costs.

[0024] Although the coarse powder as recycled powder has little effect on the vacuum pump unit, compared with the bulk raw material, the powdered coarse powder has a larger specific surface area and directly contacts the inner wall of the crucible. During the melting process, it erodes the inner wall of the crucible, causing the inner wall to peel off and crack, which reduces the service life of the melting crucible. At the same time, the refractory coating on the inner wall of the crucible will also enter the metal liquid, resulting in an increase in the inclusion content in the final metal powder. When this metal powder is used in 3D printing, the printed parts are prone to cracking, and the mechanical properties of the printed parts will also decrease.

[0025] The existing solution is to remelt the returned powder and then cast it into master alloy bars for use, or to press the returned powder into blocks for use. This requires special melting equipment or briquetting equipment, which increases the use process and cost of the returned powder. Therefore, most vacuum induction atomization powder making companies choose to directly put the coarse powder into the furnace for use, and directly discard the ultrafine powder that cannot be put into the furnace. This method will lead to large fluctuations in the carbon content of the metal powder, a short crucible life, and because the ultrafine powder cannot be used, the profit margin of the metal powder is reduced.

[0026] Based on the above-mentioned deficiencies in the prior art, an embodiment of the present invention provides a control device for the carbon content of high-temperature alloys, which solves the problem of recycling powder into the furnace for reuse, while avoiding the problem of large fluctuations in the carbon content in the metal powder, thereby increasing the service life of the melting crucible and increasing the comprehensive profit margin of the metal powder.

[0027] Figure 1 The following is a schematic diagram of a structure of a control device for carbon content of a high temperature alloy provided by an embodiment of the present invention. Figure 1 As shown, the control device for the carbon composition of a high-temperature alloy provided in an embodiment of the present invention includes: a smelting chamber 1, a metal component 2, a vacuum component 3 and a powder forming device 4.

[0028] like Figure 1 As shown, the above-mentioned smelting chamber 1 is used to melt metal powder raw materials. It should be understood that the metal powder raw materials here can be metal materials or non-metal materials. Specifically, metal materials or non-metal materials with corresponding weight ratios can be selected according to the alloy grade requirements of the metal powder to be configured and the proportional relationship between the alloy components. The interior of the smelting chamber 1 can have a smelting crucible 1-1, and the metal powder raw materials are located in the smelting crucible 1-1 for smelting. The interior of the smelting chamber 1 can also have a funnel 1-2, which is located below the smelting crucible 1-1, and is used to contain the metal liquid in the smelting crucible 1-1, and transport the metal liquid to the powder molding device 4. After being processed by the powder molding device 4, metal powder is obtained.

[0029] like Figure 1 As shown, the metal component 2 is located in the smelting chamber 1. When the smelting chamber 1 has a smelting crucible 1-1 inside, the metal component 2 is located in the smelting crucible 1-1. The metal component 2 may have a containing cavity for containing the cavity material containing carbon and recycled powder. It should be understood that the recycled powder here may be ultrafine powder or a mixture of ultrafine powder and coarse powder. At this time, the metal powder raw material may also include the metal component 2 and the cavity material.

[0030] For example, when the recycled powder is ultrafine powder, the ultrafine powder and a certain amount of carbon block are placed in the accommodating cavity of the metal component, so that the ultrafine powder and the carbon block are gradually melted under the protection of the metal component, thereby avoiding the situation where the ultrafine powder is sucked into the vacuum component and the vacuum component is damaged. At the same time, the problem of large fluctuations in the carbon content in the metal powder caused by the carbon element being sucked into the vacuum component is avoided, thereby ensuring the quality of the metal powder. At this time, the metal powder raw materials include ultrafine powder, carbon block and metal component.

[0031] For another example, when the recycled powder is a mixture of ultrafine powder and coarse powder, on the basis of the effect of the recycled powder being ultrafine powder, the coarse powder is placed in the accommodating cavity of the metal component for melting, which can avoid the erosion of the inner wall of the melting crucible by the coarse powder, thereby increasing the service life of the melting crucible. At the same time, it can prevent the refractory coating on the inner wall of the melting crucible from entering the metal liquid formed by the melting of the metal powder raw material, thereby increasing the inclusion content in the obtained metal powder and reducing the quality of the metal powder.

[0032] like Figure 1 As shown, the vacuum assembly 3 can be disconnected from the receiving cavity, and is used to evacuate the receiving cavity to ensure that the internal environment of the receiving cavity is a vacuum environment. On the one hand, it can prevent the impurity content in the metal powder from increasing due to the presence of impurities such as nitrogen and oxygen, thereby affecting the quality of the metal powder. On the other hand, since the internal environment of the smelting chamber 1 is a vacuum environment during the smelting of the metal powder raw material by the smelting chamber 1, and the receiving cavity is a sealed cavity, at this time, if there is gas inside the receiving cavity, the gas expands due to heat during the heating process, which may cause the risk of explosion of the metal component 2. Therefore, in order to avoid the risk of explosion of the metal component 2, it is necessary to evacuate the receiving cavity of the metal component 2 to ensure the balance of the internal and external pressures of the metal component 2. In practical applications, the vacuum degree in the smelting chamber 1 is generally 1Pa~5Pa, so the vacuum degree of the metal component 2 can be 1Pa~5Pa.

[0033] like Figure 1As shown, the powder forming device 4 is connected to the smelting chamber 1. It should be understood that the powder forming device 4 here may include an atomizer 4-1 and a metal powder recovery device 4-2. The atomizer 4-1 is used to use an inert gas jet to break up the metal liquid to form small metal droplets. The small metal droplets are under the action of the inert gas and their own gravity. In practical applications, the metal powder recovery device 4-2 may include an atomization chamber connected to the atomizer 4-1, a cyclone separator connected to the atomization chamber, an exhaust structure and a powder collection structure connected to the cyclone separator, etc. Among them, the atomization chamber is used to accommodate the small metal droplets formed after the atomization treatment of the atomizer 4-1. The small metal droplets gradually condense into metal powder during the flight of the atomization chamber. After separation by the cyclone separator, the metal powder falls into the powder collection structure, and the inert gas is discharged by the exhaust structure. Since the powder forming device 4 is a commonly used structure in the field, it is not introduced in detail here.

[0034] In order to ensure that the composition of the prepared metal powder meets the requirements of its alloy grade, the metal type contained in the metal powder is the same as the metal type contained in the metal powder raw material, and the weight ratio of different types of metals contained in the metal powder is the same as the weight ratio of different types of metals contained in the metal powder raw material.

[0035] like Figure 1 As shown, there is a gap between the inner wall of the smelting chamber 1 and the outer wall of the metal component 2 (hereinafter referred to as the gap of the smelting chamber 1), which can accommodate metal powder raw materials. It should be understood that the smelting chamber 1 here can be a smelting chamber with a smelting crucible 1-1. At this time, the gap between the inner wall of the smelting chamber 1 and the outer wall of the metal component 2 can be an area in the smelting crucible 1-1 except the area where the metal component 2 is located. Since other metal materials and non-metallic materials need to be added according to the alloy grade requirements of the prepared metal powder when preparing metal powder. Therefore, the above-mentioned metal powder raw materials can also include metal materials contained in the gap of the smelting chamber 1 and non-metallic materials contained in the gap of the smelting chamber 1. It should be understood that the metal material here can be an iron rod, a nickel plate or a cobalt plate, etc., which can be added according to the alloy grade requirements of the metal powder in practical applications. Non-metallic materials can be non-metallic materials other than carbon added according to the alloy grade requirements of the metal powder. Since these non-metallic materials will not be burned, they do not need to be placed in the metal component 2 in order to improve production efficiency, and can be placed in the gap of the smelting chamber 1.

[0036] Figure 2 The schematic diagram of the structure of the connection between the metal component and the vacuum component provided by the embodiment of the present invention is illustrated. Figure 1 and Figure 2As shown, the metal component 2 includes a first metal material 2-1 in the form of a container with an opening, and a second metal material 2-2 in the form of a cover body matching the opening. The accommodating cavity is located in the first metal material 2-1. The first metal material 2-1 is sealed and connected to the second metal material 2-2. It should be understood that the sealed connection here can be a threaded connection, or it can be welding, etc. The material of the metal component 2 is a metal material, and in order to avoid the introduction of impurities, the purity of the metal material is 99.9%. Since metal powder can be divided into three types: iron-based, nickel-based, and cobalt-based, the material of the metal component 2 can be one or more of iron, cobalt and nickel. For example, the material of the metal component 2 can be iron foil, cobalt foil, nickel foil, etc. In practical applications, the material of the metal component 2 needs to be selected according to the alloy grade of the prepared metal powder. For example, the prepared metal powder is a metal powder of a nickel-based alloy, and accordingly, the material of the metal component 2 selects nickel metal. It can be seen from the above that the materials of the metal components 2 provided in the embodiments of the present invention are all metal materials required for the preparation of metal powders, and have a simple structure and are easy to manufacture.

[0037] It should be noted that, in order to ensure that the weight of the metal component does not affect the chemical composition of the metal powder, if part of the base metal material for preparing the metal powder is contained in the gap of the smelting chamber, when mixing, the total weight of the base metal material can be the sum of the weight of the part of the base metal material and the weight of the metal component. If part of the base metal material for preparing the metal powder is not contained in the gap of the smelting chamber, it is necessary to add the remaining metal raw materials and non-metal raw materials according to the weight ratio based on the chemical composition requirements of the alloy grade of the metal powder, taking the weight of the metal component as the weight of the base metal material, so that the chemical composition of the metal powder finally obtained meets the requirements of its alloy grade.

[0038] For example, when preparing metal powder with alloy grade GH3536, since the metal powder with alloy grade GH3536 is a nickel-based alloy, the base metal material of the metal powder is nickel, and a metal component made of nickel needs to be selected. After adding the corresponding recycled powder and a certain amount of carbon into the accommodating chamber of the metal component made of nickel, if a nickel block is added into the gap of the smelting chamber (referring to the smelting crucible, outside the metal component), the weight of the base metal material nickel needs to be the sum of the weight of the nickel block and the weight of the metal component, and then according to the proportion between the components in Table 1, a certain amount of chromium, cobalt, tungsten, molybdenum, iron, and carbon is added into the gap of the smelting chamber for smelting.

[0039] Table 1 Composition of metal powder of GH3536 alloy

[0040]

[0041] like Figure 2As shown, the second metal material 2-2 has an exhaust hole 2-2-1, and the exhaust hole 2-2-1 can be disconnected from the vacuum component 3. After the environment of the receiving chamber in the metal component 2 is prepared into a vacuum environment by the vacuum component 3, it is beneficial to reduce the content of nitrogen and oxygen impurities in the metal powder and improve the quality of the metal powder.

[0042] like Figure 1 and Figure 2 As shown, the control device for the carbon content of the high temperature alloy further includes a filter 5. The filter 5 is connected to the vacuum component 3 to reduce the possibility that the vacuum component 3 absorbs other fine substances such as ultrafine powder during the vacuuming process, thereby increasing the life of the vacuum component.

[0043] The embodiment of the present invention also provides a method for controlling the carbon content of a high-temperature alloy. The method for controlling the carbon content of a high-temperature alloy is applied to a control device for the carbon content of a high-temperature alloy having a smelting chamber, a metal component, a vacuum component, and a powder forming device. The smelting chamber is used to smelt metal powder raw materials, and the metal component has a containing cavity. The method for controlling the carbon content of a high-temperature alloy includes:

[0044] S100: Provide a smelting chamber with a metal component. The accommodating cavity of the metal component contains an intra-cavity material containing carbon and recycled powder.

[0045] In practical applications, after selecting a metal component according to the type of base metal material of the alloy grade of the recycled powder, the recycled powder and the carbon block can be placed in the containing cavity of the metal component, and the second metal material can be covered to make the inside of the containing cavity in a sealed environment. Then, the metal component is stacked in the melting crucible of the melting chamber.

[0046] S110: evacuating the receiving cavity by using a vacuum component to make the interior of the receiving cavity a vacuum environment.

[0047] In practical applications, a vacuum component can be used to connect to the exhaust hole of the second metal material. After the containing cavity is evacuated, the vacuum component is removed and the exhaust hole is squeezed and sealed to create a vacuum environment inside the containing cavity. This is to minimize the content of impurities such as nitrogen and oxygen, improve the quality of the prepared metal powder, and avoid the risk of explosion of metal components.

[0048] S120: The smelting chamber is evacuated by using a vacuum component.

[0049] In practical applications, after ensuring that the metal components are stacked and the corresponding metal materials and non-metallic materials are added according to the alloy grade requirements of the metal powder, the vacuum component can be used to evacuate the melting chamber so that the interior of the melting chamber is a vacuum environment, so as to minimize the content of impurities such as nitrogen and oxygen in the melting chamber and improve the quality of the prepared metal powder.

[0050] S130: Using a smelting chamber to melt the metal powder raw material in the smelting chamber into a metal liquid. It should be understood that the metal powder raw material here includes at least one or more of metal components, carbon and recycled powder. Of course, the metal powder raw material may also include non-metallic materials and other metal materials, etc., which should be selected according to actual conditions.

[0051] S140: Atomizing the metal liquid using a powder forming device to obtain metal powder.

[0052] Before the vacuum assembly is used to evacuate the smelting chamber, the method for controlling the carbon composition of the high-temperature alloy provided by the embodiment of the present invention further includes:

[0053] S110-1: Add corresponding non-metallic materials and metal materials into the smelting chamber according to the component ratio requirements of the metal powder. It should be noted that when adding corresponding non-metallic materials and metal materials into the smelting chamber, it is necessary to consider the weight of the metal components in the smelting chamber and the component ratio requirements of the metal powder. For details, please refer to the previous description of how to ensure that the weight of the metal components does not affect the chemical composition of the metal powder, which will not be repeated here. In actual applications, according to the component ratio requirements of the metal powder, corresponding non-metallic materials and metal materials can be added to the smelting crucible in the smelting chamber. At this time, the smelting crucible can contain added metal materials, non-metallic materials, metal components, and cavity materials located inside the metal components.

[0054] Compared with the prior art, the beneficial effects of the method for controlling the carbon content of a high-temperature alloy provided by the present invention are the same as the beneficial effects of the above-mentioned device for controlling the carbon content of a high-temperature alloy, which will not be described in detail here.

[0055] In order to better explain the effect of the present invention, the smelting of GH3536 alloy is taken as an example below, and the metal powder of GH3536 alloy is manufactured using a control device and a control method for the carbon component of a high-temperature alloy provided by an embodiment of the present invention.

[0056] Embodiment 1

[0057] GH3536 is a nickel-based high-temperature alloy, so nickel foil is used to make the first and second metal materials of the metal component. According to the chemical composition requirements of the metal powder of the GH3536 alloy, 100kg of metal powder raw materials other than the materials in the cavity and 50kg of ultrafine powder are loaded into the smelting chamber. The required composition range of the metal powder carbon of the GH3536 alloy is 0.055% to 0.065%, and the carbon batching composition is 0.065%. Put the carbon block and ultrafine powder into the metal component, seal the metal component, and use the vacuum component to evacuate the vacuum component to 1Pa to 5Pa. After reaching the vacuum degree requirement, evacuate the vacuum component and seal the exhaust hole of the second metal material of the metal component to make the accommodating chamber of the metal component a vacuum environment. Put the metal component with a vacuum environment into the melting crucible of the melting chamber and stack it, and add the remaining raw materials weighed according to the alloy grade requirements of the metal powder into the melting crucible, close the upper cover of the melting chamber, and start vacuum melting. As the temperature of the smelting chamber increases, the metal components and the materials in the cavity of the metal components gradually melt into liquid metal. When the liquid metal reaches the requirements for steel casting, the liquid in the smelting crucible is poured into a funnel, and the funnel is used to transport the liquid metal to a powder forming device for atomization treatment to obtain metal powder. Finally, the carbon content of the metal powder obtained in this embodiment is tested, and the test results are shown in Table 2. It should be noted that in order to prevent the ultrafine powder and carbon elements from being sucked into the vacuum component during vacuuming, the vacuum component can be connected to a filter. Of course, in order to improve the filtering effect, the vacuum component can also be connected to multiple filters for step-by-step filtering. It should also be noted that when mixing the ingredients, the sum of the weight of the added nickel plate and the weight of the metal component made of nickel material is the total weight of nickel required for the metal powder, and the ingredients of the remaining materials should be configured based on the total weight of nickel.

[0058] Comparative Example 1

[0059] Different from Example 1, all the metal powder raw materials weighed and prepared according to the alloy grade requirements of the metal powder are added into the melting crucible of the melting chamber, the lid of the melting chamber is closed, and vacuum melting is started. As the temperature of the melting chamber increases, the metal component and the cavity material inside the metal component gradually melt into liquid metal. When the liquid metal meets the requirements for steel casting, the powder forming device is used to atomize the liquid metal to obtain metal powder. The carbon content of the metal powder obtained in this comparative example is tested, and the test results are shown in Table 2.

[0060] Table 2 Carbon content of metal powder

[0061]

[0062] As can be seen from Table 2, in Example 1, by adding ultrafine powder and carbon blocks from recycled powder to metal components, the carbon content in the metal powder obtained is significantly higher than the carbon content in the metal powder obtained by the method in Comparative Example 1. In addition, the burnout ratio of carbon element in Example 1 is relatively small, which is conducive to achieving narrow component control of carbon element in metal powder. At the same time, by comparing the erosion of the inner wall of the crucible in the smelting chamber, it can be seen that the erosion of the inner wall of the crucible in Comparative Example 1 is much more serious than that of the inner wall of the crucible in Example 1. Therefore, the impurity content of the metal powder obtained by the method in Comparative Example 1 is higher, and the quality of the metal powder is poor.

[0063] In summary, the metal powder prepared by the control device and control method of the carbon composition of high-temperature alloys provided by the embodiments of the present invention has a low impurity content and realizes the narrow composition control of the carbon element. At the same time, the ultrafine powder can be directly used, which reduces the process complexity, reduces the production cost, and also increases the service life of the melting crucible.

[0064] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0065] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A control device for carbon composition of high temperature alloy, characterized in that: include: A smelting chamber, a metal component, a vacuum assembly and a powder forming device; the smelting chamber is used to smelt metal powder raw materials, the metal component is located in the smelting chamber, the metal component has a containing cavity for containing materials in the cavity containing carbon and recycled powder, the metal powder raw materials include the metal component and the materials in the cavity, the vacuum assembly can be disconnected from the containing cavity, and is used to evacuate the containing cavity, and the powder forming device is connected to the smelting chamber; the metal component includes a first portion of metal material in the form of a container with an opening, and a second portion of metal material in the form of a cover body matching the opening, the containing cavity is located in the first portion of metal material, the first portion of metal material is sealed with the second portion of metal material, the sealed connection is threaded connection or welding, the second portion of metal material has an exhaust hole, and the exhaust hole is disconnected from the vacuum assembly; there is a gap between the inner wall of the smelting chamber and the outer wall of the metal component, the metal powder raw material includes metal material contained in the gap, and the metal powder raw material also includes non-metallic material contained in the gap.

2. The control device for carbon composition of high temperature alloy according to claim 1, characterized in that: The type of metal contained in the metal powder is the same as the type of metal contained in the metal powder raw material; The weight ratio of the different types of metals contained in the metal powder is the same as the weight ratio of the different types of metals contained in the metal powder raw material.

3. The control device for carbon composition of high temperature alloy according to claim 1, characterized in that: The purity of the material of the metal component is 99.9%; and / or, The material of the metal component is one or more of iron, cobalt and nickel.

4. The control device for carbon composition of high temperature alloy according to any one of claims 1 to 3, characterized in that: The control device for the carbon content of the high-temperature alloy further comprises a filter, and the filter is connected to the vacuum component.

5. A method for controlling the carbon content of a high-temperature alloy, characterized in that: The invention is applied to a control device having a smelting chamber, a metal component, a vacuum component and a high-temperature alloy carbon component according to any one of claims 1 to 4, wherein the smelting chamber is used to smelt metal powder raw materials, and the metal component has a containing cavity; the control method of the high-temperature alloy carbon component comprises: A smelting chamber having a metal component is provided, wherein a cavity of the metal component contains a cavity material containing carbon and recycled powder; Using a vacuum component to evacuate the accommodating cavity, so that the interior of the accommodating cavity is a vacuum environment; Using a vacuum component to evacuate the smelting chamber; Using a smelting chamber to melt a metal powder raw material in the smelting chamber into a metal liquid, the metal powder raw material at least comprising one or more of the metal component, carbon and recycled powder; The metal liquid is atomized by using a powder forming device to obtain metal powder.

6. The method for controlling the carbon composition of a high temperature alloy according to claim 5, characterized in that: Before the smelting chamber is evacuated by the vacuum component, the method for controlling the carbon content of the high-temperature alloy further includes: adding corresponding non-metallic materials and metal materials into the smelting chamber according to the component ratio requirements of the metal powder.

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