Formula and preparation process of high-temperature aluminum with good tensile strength

Abstract

The invention relates to the technical field of high-temperature aluminum, and discloses a high-temperature aluminum formula with good tensile strength, which comprises Si (silicon), Fe (iron), Mn (manganese), Cr (chromium), Ti (titanium), Zr (zirconium) and Pb (lead), and a preparation process of the high-temperature aluminum with good tensile strength comprises the following specific steps: S1, raw material preparation, S2, smelting, S3, refining and degassing, S4, standing and heat preservation, S5, casting molding and S6, post-treatment. The high-temperature aluminum produced by the process has excellent high-temperature stability: the smelting temperature (750-850 DEG C) in the preparation process is strictly controlled by precisely controlling the element formula ratio, and a temperature test is carried out on a product which is subjected to die casting in a muffle furnace at the temperature of (580-600 DEG C) for 2 hours, so that the high-temperature aluminum material has excellent stability in a high-temperature environment; the problems of blackening, cracking, deformation and bubbling are effectively avoided, and the use requirements in aerospace and automobile high-temperature operation environments are met.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature aluminum, and specifically to a high-temperature aluminum formulation with good tensile strength and its preparation process. Background Art

[0002] In modern industrial production, high-temperature aluminum materials are widely used in many fields such as aerospace, automotive manufacturing, and the electronics industry. For example, in the aerospace field, high-temperature aluminum is used to manufacture key components such as engine parts and fuselage frames, which are required to have good high-temperature stability and mechanical properties; in the automotive industry, high-temperature aluminum is used to manufacture engine blocks, turbocharger housings, etc. to meet the needs of lightweight and high-temperature resistance.

[0003] However, the existing high-temperature aluminum materials have certain limitations in terms of performance and preparation process. From the perspective of performance, traditional high-temperature aluminum materials are prone to problems such as blackening, cracking, deformation, and blistering in high-temperature environments, and there are also defects such as insufficient thermal conductivity, poor hardness and tensile strength, making it difficult to meet the increasingly stringent requirements of high-end manufacturing. In the preparation process, the proportioning of the element formulation is not precise enough, resulting in large fluctuations in product performance. At the same time, the control of key parameters such as melting temperature and die-casting temperature is not accurate enough, affecting the stability and consistency of product quality. In addition, the existing preparation process is difficult to ensure that the high-temperature aluminum material can stably exhibit characteristics such as non-blackening, non-cracking, non-deformation, non-blistering, fast heat conduction, high hardness, and good tensile strength after die-casting, restricting the application and development of high-temperature aluminum materials in high-end fields. Summary of the Invention

[0004] (I) Technical Problems to be Solved In view of the deficiencies of the prior art, the present invention provides a high-temperature aluminum formulation with good tensile strength and its preparation process, which has excellent high-temperature stability and other advantages, and solves the problems that traditional high-temperature aluminum materials are prone to blackening, cracking, deformation, and blistering in high-temperature environments.

[0005] (II) Technical Solutions To achieve the above object of excellent high-temperature stability, the present invention provides the following technical solution: A high-temperature aluminum formulation with good tensile strength, including Si (silicon), Fe (iron), Mn (manganese), Cr (chromium), Ti (titanium), Zr (zirconium), and Pb (lead), wherein the content of Si (silicon) is 0.3 - 3.5%; Among them, the content of Fe (iron) is 0.3 - 3.5%; Among them, the content of Mn (manganese) is 0.8 - 4.5%; Among them, the content of Cr (chromium) is 0.05 - 3%; Among them, the content of Ti (titanium) is 0.1 - 3.5%; Among them, the content of Zr (zirconium) is 0.001 - 2%; Among them, the content of Pb (lead) is ≤0.5%; Other metal elements are classified according to A00 aluminum's own components.

[0006] Preferably, a process for preparing high-temperature aluminum with good tensile strength comprises the following specific steps: S1 raw material preparation, S2 smelting, S3 refining and degassing, S4 static insulation, S5 casting and S6 post-processing; Among them, S1 raw material preparation includes S101 adding raw material testing steps and S102 optimizing pretreatment methods; Among them, S2 smelting includes S201 using an intelligent temperature control system and S202 optimizing stirring strategy; Among them, S3 refining and degassing includes S301 precise addition of refining agent and S302 combined refining method; Among them, S5 casting molding includes S501 optimization of mold preheating method and S502 use of vacuum casting technology; Among them, S6 post-processing includes S601 improved demoulding process and S602 precise aging treatment.

[0007] Preferably, the step S101 adds a raw material testing step: before accurately weighing A00 aluminum and various element additives, a spectrum analyzer is used to quickly test the raw materials to confirm again whether their element content and purity meet the production standards, so as to avoid potential quality problems of the raw materials affecting the final product; S102 optimized pretreatment method: In addition to using conventional methods to remove oil and oxide scale on the surface of raw materials, an ultrasonic cleaning step can be added for A00 aluminum to further improve the cleaning effect and ensure the purity of the raw materials. For additives, vacuum drying treatment is used to remove possible adsorbed moisture and prevent the generation of gas impurities during smelting.

[0008] Preferably, the S201 adopts an intelligent temperature control system: a high-precision temperature sensor and an intelligent control system are installed in the furnace to achieve precise control of the heating process, so that the temperature is raised to 750-850°C more evenly, reducing the impact of temperature fluctuations on the quality of the aluminum liquid; S202 optimizes stirring strategy: using variable frequency stirring technology, the stirring speed is adjusted in real time according to the melting of aluminum liquid and the dissolution of additives. Low-speed stirring is used in the initial stage of aluminum melting to avoid heat loss caused by vigorous stirring. After the additives are added, the stirring speed is appropriately increased to ensure that the additives are quickly and evenly dissolved. The stirring time is still controlled within 5-10 minutes.

[0009] Preferably, the S301 precise addition of refining agent: using online density monitoring equipment to monitor the density of the aluminum liquid in real time, and combining the total amount of aluminum liquid with the precise addition of refining agent through an automated metering device, to ensure a more accurate amount of refining agent added and improve the refining and degassing effect; S302 Combined refining method: Adopt a combination of gas blowing refining and electromagnetic stirring refining. While conducting gas blowing refining, use electromagnetic stirring to generate vortices in the molten aluminum, promoting the full contact between the refining agent and the molten aluminum, and more effectively removing harmful impurities such as hydrogen and oxide inclusions. The refining and degassing time remains 15 - 25 minutes.

[0010] Preferably, for the S4 standing and heat preservation: During the standing and heat preservation stage, install an electromagnetic induction heating device in the furnace to maintain the temperature of the molten aluminum stable in the range of 750 - 800°C, avoiding insufficient floating of impurities caused by temperature fluctuations. At the same time, use an inert gas to cover the surface of the molten aluminum to prevent the molten aluminum from being oxidized again during standing. The standing and heat preservation time is 20 - 30 minutes.

[0011] Preferably, for the S501 optimizing the mold preheating method: Use infrared heating technology to preheat the die-casting mold, making the mold temperature reach 580 - 600°C more evenly, and avoiding molding defects of high-temperature aluminum products caused by local temperature differences in the mold; S502 Adopt vacuum casting technology: During casting, place the die-casting mold in a vacuum environment to reduce the air entrained in the molten aluminum during casting, and improve the density and quality of high-temperature aluminum products.

[0012] Preferably, for the S601 improving the demolding process: Adopt a new type of demolding agent, which has better demolding performance and less residue. At the same time, optimize the demolding equipment and adopt a combination of mechanical assisted demolding and chemical demolding to more efficiently remove the demolding agent substances remaining on the product surface; S602 Precision aging treatment: Use on-line monitoring equipment for hardness and strength to real-time monitor the performance changes of the product during the aging treatment process at 580 - 600°C. According to the monitoring data, fine-tune the aging treatment time and temperature, and more precisely improve the comprehensive performance of the product's tensile strength and hardness within about 2 hours of aging treatment time.

[0013] (III) Beneficial effects Compared with the prior art, the present invention provides a high-temperature aluminum formula with good tensile strength and its preparation process, having the following beneficial effects: 1. For the high-temperature aluminum formula with good tensile strength and its preparation process, the high-temperature aluminum produced by this process has excellent high-temperature stability: By precisely controlling the element formula ratio, strictly controlling the melting temperature (750°C - 850°C) in the preparation process, and testing the temperature retention of the die-cast product in a muffle furnace at (580°C - 600°C) for 2 hours, the high-temperature aluminum material has excellent stability in a high-temperature environment, effectively avoiding problems such as blackening, cracking, deformation, and blistering, and meeting the use requirements in the high-temperature working environments of aerospace and automobiles.

[0014] 2. The high-temperature aluminum formula with good tensile strength and its preparation process. The high-temperature aluminum produced by this process has excellent thermal conductivity: the optimized element formula and preparation process significantly improve the thermal conductivity of the high-temperature aluminum material, making it conduct heat faster and able to transfer and dissipate heat more efficiently. It can be used in the field of heat dissipation modules for electronic equipment with high heat dissipation requirements.

[0015] 3. The high-temperature aluminum formula with good tensile strength and its preparation process. The high-temperature aluminum produced by this process has excellent mechanical properties: this high-temperature aluminum material has great hardness and good tensile strength. After die-casting, the product was simulated and tested at 580-600℃ for 2 hours, and the performance was stable, which enables it to withstand greater external forces and is not easily damaged when subjected to mechanical stress. It is suitable for manufacturing various parts that need to withstand high-intensity loads, such as aircraft engine blades and automotive suspension system components, thereby improving the service life and reliability of the products.

[0016] 4. The high-temperature aluminum formula with good tensile strength and its preparation process. The high-temperature aluminum produced by this process has high quality stability: the precise element formula and strictly controlled preparation process parameters ensure the high consistency and stability of product quality, reduce the fluctuation of product performance, are conducive to large-scale industrial production, reduce the defective rate, and improve production efficiency and enterprise economic benefits. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The present invention provides a technical solution, specifically, a high-temperature aluminum formula with good tensile strength, including Si (silicon), Fe (iron), Mn (manganese), Cr (chromium), Ti (titanium), Zr (zirconium) and Pb (lead); Among them, the content of Si (silicon) is 0.3-3.5%; Among them, the content of Fe (iron) is 0.3-3.5%; Among them, the content of Mn (manganese) is 0.8-4.5%; Among them, the content of Cr (chromium) is 0.05-3%; Among them, the content of Ti (titanium) is 0.1-3.5%; Among them, the content of Zr (zirconium) is 0.001-2%; Among them, the content of Pb (lead) is ≤0.5%; Other metal elements are classified according to the A00 aluminum content; The model of this high temperature aluminum is: MFA-8; A process for preparing high-temperature aluminum with good tensile strength comprises the following specific steps: S1 raw material preparation: S101 adds a raw material testing step: Before accurately weighing A00 aluminum and various element additives, use a spectrum analyzer to quickly test the raw materials to confirm again whether their element content and purity meet production standards, to avoid potential raw material quality issues affecting the final product; S102 optimized pretreatment method: In addition to using conventional methods to remove oil and oxide scale on the surface of raw materials, an ultrasonic cleaning step can be added for A00 aluminum to further improve the cleaning effect and ensure the purity of the raw materials. For additives, vacuum drying treatment is used to remove possible adsorbed moisture and prevent the generation of gas impurities during smelting; S2 smelting: The S201 uses an intelligent temperature control system: high-precision temperature sensors and an intelligent control system are installed in the furnace to achieve precise control of the heating process, allowing the temperature to rise more evenly to 750-850°C, reducing the impact of temperature fluctuations on the quality of the molten aluminum; S202 Optimized stirring strategy: Utilizes variable frequency stirring technology to adjust stirring speed in real time based on the melting of aluminum liquid and the dissolution of additives. Low stirring speed is used in the initial stage of aluminum melting to avoid heat loss caused by vigorous stirring. After the additives are added, the stirring speed is appropriately increased to ensure rapid and even dissolution of the additives, while the stirring time is still controlled within 5-10 minutes. S3 refining and degassing: S301 Precise Addition of Refining Flux: Utilize online density monitoring equipment to monitor the density of molten aluminum in real time. Combined with the total amount of molten aluminum, the refining flux is precisely added through an automated metering device to ensure a more accurate amount of refining flux added and improve the refining and degassing effect. S302 combined refining method: It adopts a combination of air blowing refining and electromagnetic stirring refining. During air blowing refining, electromagnetic stirring is used to generate vortex in the aluminum liquid, promoting full contact between the refining agent and the aluminum liquid, more effectively removing hydrogen, oxide inclusions and harmful impurities, while the refining and degassing time remains at 15-25 minutes; S4: Static holding: During the static holding stage, an electromagnetic induction heating device is added to the furnace to maintain the aluminum liquid temperature stable in the range of 750-800°C to avoid insufficient floating of impurities due to temperature fluctuations. At the same time, an inert gas is used to cover the aluminum liquid surface to prevent the aluminum liquid from re-oxidizing during the static holding process. The static holding time is 20-30 minutes. S5 casting: S501 optimizes mold preheating: uses infrared heating technology to preheat the die-casting mold, making the mold temperature reach 580-600°C more uniformly, avoiding defects in high-temperature aluminum products caused by local temperature differences in the mold; S502 adopts vacuum casting technology: during casting, the die-casting mold is placed in a vacuum environment to reduce the air involved in the aluminum liquid during the casting process, thereby improving the density and quality of high-temperature aluminum products; S6 post-processing: S601 improves the demoulding process: adopts a new type of demoulding agent with better demoulding performance and less residue. At the same time, the demoulding equipment is optimized and a combination of mechanical assisted demoulding and chemical demoulding is adopted to more efficiently remove the residual release agent on the product surface. S602 Precision Aging Treatment: Utilizing online hardness and strength monitoring equipment, the product's performance changes during aging treatment at 580-600°C are monitored in real time. Based on the monitoring data, the aging treatment time and temperature are fine-tuned, resulting in a more precise improvement in the product's tensile strength and hardness within a 2-hour aging treatment period. Furthermore, the high-temperature aluminum produced by this process has excellent high-temperature stability: by precisely controlling the element formula ratio, strictly controlling the melting temperature (750℃-850℃) in the preparation process, and subjecting the die-cast products to a 2-hour temperature test in a muffle furnace (580℃-600℃), this high-temperature aluminum material has excellent stability in high-temperature environments, effectively avoiding blackening, cracking, deformation, and blistering, and meeting the requirements of use in high-temperature operating environments in aerospace and automotive industries. Furthermore, the high-temperature aluminum produced by this process has excellent thermal conductivity: the optimized element formula and preparation process significantly improve the thermal conductivity of high-temperature aluminum materials, making it conduct heat faster and more efficient in heat transfer and heat dissipation. It can be used in the field of heat dissipation modules for electronic equipment with high heat dissipation requirements; Furthermore, the high-temperature aluminum produced by this process possesses excellent mechanical properties: This high-temperature aluminum material has high hardness and good tensile strength. After die-casting, the product was subjected to a two-hour simulation test at 580-600°C, demonstrating stable performance. This allows it to withstand greater external forces and is less susceptible to damage when subjected to mechanical stress. This makes it suitable for manufacturing various parts that need to withstand high-intensity loads, such as aircraft engine blades and automotive suspension system components, thereby improving product lifespan and reliability. Furthermore, the high-temperature aluminum produced by this process has high quality stability: the precise element formula and strictly controlled preparation process parameters ensure the high consistency and stability of product quality, reduce the fluctuation of product performance, are conducive to large-scale industrial production, reduce the defective rate, and improve production efficiency and enterprise economic benefits.

[0019] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature aluminum formulation with good tensile strength, comprising Si (silicon), Fe (iron), Mn (manganese), Cr (chromium), Ti (titanium), Zr (zirconium), and Pb (lead), characterized in that: The Si (silicon) content is 0.3-3.5%; Among them, the content of Fe (iron) is 0.3-3.5%; Among them, the content of Mn (manganese) is 0.8-4.5%; Among them, the content of Cr (chromium) is 0.05-3%; Among them, the content of Ti (titanium) is 0.1-3.5%; Among them, the content of Zr (zirconium) is 0.001-2%; Among them, the content of Pb (lead) is ≤0.5%; Other metal elements are classified according to the A00 aluminum content.

2. A preparation process of high-temperature aluminum with good tensile strength, comprising the following specific steps: S1 raw material preparation, S2 melting, S3 refining and degassing, S4 standing and heat preservation, S5 casting and forming, and S6 post-treatment, characterized in that: Said S1 raw material preparation includes S101 adding a raw material detection step and S102 optimizing the pretreatment method; Among them, S2 smelting includes S201 using an intelligent temperature control system and S202 optimizing stirring strategy; Among them, S3 refining and degassing includes S301 precise addition of refining agent and S302 combined refining method; Among them, S5 casting molding includes S501 optimization of mold preheating method and S502 use of vacuum casting technology; Among them, S6 post-processing includes S601 improved demoulding process and S602 precise aging treatment.

3. The preparation process of high-temperature aluminum with good tensile strength according to claim 2, characterized in that: The S101 adds a raw material testing step: before accurately weighing A00 aluminum and various element additives, use a spectrum analyzer to quickly test the raw materials to confirm again whether their element content and purity meet production standards, so as to avoid potential quality problems of raw materials affecting the final product; S102 optimized pretreatment method: In addition to using conventional methods to remove oil and oxide scale on the surface of raw materials, an ultrasonic cleaning step can be added for A00 aluminum to further improve the cleaning effect and ensure the purity of the raw materials. For additives, vacuum drying treatment is used to remove possible adsorbed moisture and prevent the generation of gas impurities during smelting.

4. A preparation process of high-temperature aluminum with good tensile strength according to claim 2, characterized in that: The S201 adopts an intelligent temperature control system: high-precision temperature sensors and intelligent control systems are installed in the furnace to achieve precise control of the heating process, so that the temperature rises more evenly to 750-850°C, reducing the impact of temperature fluctuations on the quality of the molten aluminum; S202 optimizes stirring strategy: using variable frequency stirring technology, the stirring speed is adjusted in real time according to the melting of aluminum liquid and the dissolution of additives. Low-speed stirring is used in the initial stage of aluminum melting to avoid heat loss caused by vigorous stirring. After the additives are added, the stirring speed is appropriately increased to ensure that the additives are quickly and evenly dissolved. The stirring time is still controlled within 5-10 minutes.

5. The preparation process of a high-temperature aluminum with good tensile strength according to claim 2, characterized in that: The S301 precise addition of refining flux: using online density monitoring equipment to monitor the density of the molten aluminum in real time, combined with the total amount of molten aluminum, the refining flux is precisely added through an automated metering device to ensure a more accurate amount of refining flux added and improve the refining and degassing effect; S302 combined refining method: It adopts a combination of air blowing refining and electromagnetic stirring refining. During air blowing refining, electromagnetic stirring is used to generate vortex in the aluminum liquid, which promotes full contact between the refining agent and the aluminum liquid, and more effectively removes hydrogen, oxide inclusions and harmful impurities. The refining and degassing time remains at 15-25 minutes.

6. The preparation process of a high-temperature aluminum with good tensile strength according to claim 2, characterized in that: The S4 static heat preservation: In the static heat preservation stage, an electromagnetic induction heating device is added in the melting furnace to maintain the temperature of the molten aluminum stable in the range of 750 - 800 °C, avoiding insufficient floating of impurities due to temperature fluctuations. At the same time, an inert gas is used to cover the surface of the molten aluminum to prevent the molten aluminum from being oxidized again during the static process. The static heat preservation time is 20 - 30 minutes.

7. A preparation process for high-temperature aluminum with good tensile strength according to claim 2, characterized in that: The S501 optimizing the mold preheating method: The die-casting mold is preheated by using infrared heating technology to make the mold temperature reach 580 - 600 °C more evenly, avoiding forming defects of high-temperature aluminum products due to local temperature differences in the mold; S502 adopting vacuum casting technology: During casting, the die-casting mold is placed in a vacuum environment to reduce the air entrained in the molten aluminum during the casting process and improve the density and quality of high-temperature aluminum products.

8. A preparation process for high-temperature aluminum with good tensile strength according to claim 2, characterized in that: The S601 improving the demolding process: A new type of demolding agent is used, which has better demolding performance and less residue. At the same time, the demolding equipment is optimized, and a combination of mechanical assisted demolding and chemical demolding is adopted to more efficiently remove the demolding agent substances remaining on the product surface; S602 precise aging treatment: Using on-line monitoring equipment for hardness and strength, the performance changes of the product during the aging treatment process at 580 - 600 °C are monitored in real time. According to the monitoring data, the aging treatment time and temperature are finely adjusted to more precisely improve the comprehensive performance of the tensile strength and hardness of the product within about 2 hours of aging treatment time.