Aluminum material for lens barrel, preparation method of aluminum material and lens barrel

Abstract

The invention provides an aluminum material for a lens cone, a preparation method of the aluminum material and the lens cone. The aluminum material for the lens barrel comprises a main material, an additive and impurities. The aluminum material for the lens cone at least comprises the following components in percentage by weight: 4.5%-5.6% of Mg as an additive; 0.3% to 0.8% of Si; 0.1% to 0.18% of Cr; 0.1% to 0.2% of Zr; 0.003% to 0.008% of B; and a main component: the remainder Al. The aluminum material for the lens barrel of the vehicle-mounted lens contains at least 92% of Al. According to the aluminum material for the lens barrel, on the basis that the light weight and the mechanical property of the aluminum material for the lens barrel are ensured, the processability of the aluminum material for the lens barrel is ensured to be improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum manufacturing technology, and in particular to an aluminum material for lens barrels, its preparation method, and a lens barrel. Background Technology

[0002] Automotive lens barrels are precision optical instruments. Adding Mg can effectively achieve high strength and lightweight. However, a large amount of Mg can cause "grain boundary embrittlement", which is especially prone to cracking during deformation processing such as cold rolling and stretching, and has a significant impact on the processing performance of aluminum materials. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an aluminum material for lens barrels, a method for preparing the same, and a lens barrel that can ensure the lightweight and mechanical properties of the aluminum material for lens barrels while improving the processing performance of the aluminum material for lens barrels.

[0004] The objective of this invention is achieved through the following technical solution: An aluminum material for a lens barrel comprises at least the following components in percentage: additive: Mg 4.5%~5.6%; Si 0.3%~0.8%; Cr 0.1%~0.18%; Zr 0.1%~0.2%; B 0.003%~0.008%; Principal components: Al balance; The aluminum material used for the lens barrel of the vehicle-mounted lens contains at least 92% Al.

[0005] In one embodiment, the additive further includes the following components in percentage amounts: Fe ≤0.15%; Cu ≤0.10; Zn ≤0.10.

[0006] In one embodiment, the aluminum material for the lens barrel also contains impurities, the impurity content is ≤0.15%, and the content of a single substance in the impurities is ≤0.05%.

[0007] A method for preparing aluminum material for lens barrels, used to obtain the aluminum material for lens barrels as described in any of the above embodiments, the method for preparing aluminum material for lens barrels includes the following steps: To obtain pure aluminum ingots and additives; The pure aluminum ingot and additives are smelted to obtain molten aluminum. The molten aluminum is cast to obtain an aluminum alloy ingot; The aluminum alloy ingot is extruded to obtain aluminum material for the lens barrel.

[0008] In one embodiment, the pure aluminum ingot and additives are smelted under magnetic stirring conditions.

[0009] In one embodiment, the pure aluminum ingot and additives are smelted under ultrasonic vibration conditions.

[0010] In one embodiment, the pure aluminum ingot and additives are smelted, including the following steps: To obtain pure aluminum ingots and additives; Zr and pure aluminum ingots are smelted once to obtain a pre-melted body; B and Si are added sequentially to the premelted body for a secondary melting process; Mg is added to the premelted body after the secondary melting process for a third melting process; The remaining additives in the premelted body after the three melting processes are subjected to a fourth melting process.

[0011] In one embodiment, the aluminum melt is cast under ultrasonic vibration conditions.

[0012] In one embodiment, after the step of extruding the aluminum alloy ingot, the method for processing the aluminum material for the lens barrel further includes the following steps: The aluminum material used for the lens barrel is subjected to aging treatment.

[0013] A lens barrel is processed from an aluminum material for a lens barrel prepared by the method described in any of the above embodiments.

[0014] Compared with the prior art, the present invention has at least the following advantages: The aluminum material for the lens barrel of this invention has a Mg content of 4.5%~5.6%, effectively achieving lightweight and high strength. In addition, 0.1%~0.2% Zr, 0.3%~0.8% Si, 0.003%~0.008% B, 4.5%~5.6% Mg, and 0.1%~0.18% Cr are added. Specifically, the addition order is Zr→Si and B→Mg→Cr. Zr preferentially dissolves in Al, which is beneficial for forming an Al-Zr composite phase as a heterogeneous nucleation core. The subsequent addition of Si and B facilitates the interaction of Si with the heterogeneous nucleation core at the interface. Zr forms a Zr-Si composite transition phase, enhancing the interfacial bonding between the Al-Zr composite phase and the Al matrix, and preventing heterogeneous nucleation core agglomeration. B is beneficial for further refining the grain size. Then, the addition of Mg is beneficial for Mg and Si to form a Mg-Si composite phase distributed on the surface of the heterogeneous nucleation core to form a core-shell structure. Further addition of Cr is beneficial for bonding to the Mg-Si composite phase to form a composite phase with Mg. That is, through chemical anchoring and coherent interface, the segregation and agglomeration of Mg are hindered, effectively improving the uniformity and dispersion stability of Mg, thereby ensuring the improvement of the processing performance of aluminum materials for lens barrels. Detailed Implementation

[0015] The present application will be further described in detail below with reference to the embodiments and examples. It should be understood that these embodiments and examples are for illustrative purposes only and are not intended to limit the scope of the present application. The purpose of providing these embodiments and examples is to enable a more thorough and comprehensive understanding of the disclosure of the present application. It should also be understood that the present application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various modifications or alterations without departing from the spirit of the present application, and the equivalent forms obtained also fall within the protection scope of the present application. Furthermore, numerous specific details are set forth in the following description to provide a fuller understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] In this invention, the technical features described in an open-ended manner include both closed-ended technical solutions composed of the listed features and open-ended technical solutions that include the listed features.

[0018] In this invention, numerical intervals (i.e., numerical ranges) are involved. Unless otherwise specified, the selected numerical distributions within the aforementioned numerical intervals are considered continuous, and include the two endpoints (i.e., the minimum and maximum values) of the numerical range, as well as every value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints. In this document, this is equivalent to directly listing every integer. For example, if t is an integer selected from 1 to 10, it means that t is any integer selected from the group of integers consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. Furthermore, when multiple ranges are provided to describe features or characteristics, these ranges can be merged. In other words, unless otherwise specified, the ranges disclosed herein should be understood to include any and all subranges to which they are included.

[0019] Unless otherwise specified, the temperature parameters in this invention can be either constant temperature treatment or vary within a certain temperature range. It should be understood that constant temperature treatment allows temperature fluctuations within the precision range controlled by the instrument. Fluctuations are permitted within ranges such as ±5℃, ±4℃, ±3℃, ±2℃, and ±1℃.

[0020] This application provides an aluminum material for lens barrels. The aforementioned aluminum material for lens barrels includes a main component, additives, and impurities. The aforementioned aluminum material for lens barrels comprises at least the following components in percentage content: Additives: 4.5%~5.6% Mg; 0.3%~0.8% Si; 0.1%~0.18% Cr; 0.1%~0.2% Zr; 0.003%~0.008% B; Main component: Balance Al. The aluminum material for the lens barrel of an automotive lens contains at least 92% Al.

[0021] The aforementioned aluminum material for the lens barrel contains 4.5%~5.6% Mg, effectively achieving both lightweight and high strength. In addition, 0.1%~0.2% Zr, 0.3%~0.8% Si, 0.003%~0.008% B, 4.5%~5.6% Mg, and 0.1%~0.18% Cr are added. Specifically, the order of addition is Zr→Si and B→Mg→Cr. Zr preferentially dissolves in Al, which is beneficial for forming an Al-Zr composite phase as a heterogeneous nucleation core. The subsequent addition of Si and B facilitates the interaction of Si and Zr at the interface of the heterogeneous nucleation core. The formation of the Zr-Si composite transition phase enhances the interfacial bonding between the Al-Zr composite phase and the Al matrix, preventing the agglomeration of heterogeneous nucleation cores. The addition of Mg further refines the grain size. The subsequent addition of Mg facilitates the formation of a Mg-Si composite phase, which is distributed on the surface of the heterogeneous nucleation core to form a core-shell structure. The further addition of Cr facilitates its bonding with the Mg-Si composite phase to form a composite phase with Mg. In other words, through chemical anchoring and coherent interfaces, the segregation and agglomeration of Mg are hindered, effectively improving the uniformity and dispersion stability of Mg, thereby ensuring the improved processing performance of aluminum materials for lens barrels.

[0022] To better understand the aluminum material for the lens barrel of this application, the following further explanation is provided: One embodiment of the aluminum material for the lens barrel comprises at least the following components in percentage: additives: 0.3%~0.8% Si; 0.1%~0.18% Cr; 0.1%~0.2% Zr; 0.003%~0.008% B; main component: balance Al. The aluminum material for the lens barrel of the automotive lens contains at least 92% Al.

[0023] The aforementioned aluminum material for the lens barrel contains 4.5%~5.6% Mg, effectively achieving both lightweight and high strength. In addition, 0.1%~0.2% Zr, 0.3%~0.8% Si, 0.003%~0.008% B, 4.5%~5.6% Mg, and 0.1%~0.18% Cr are added. Specifically, the order of addition is Zr→Si and B→Mg→Cr. Zr preferentially dissolves in Al, which is beneficial for forming an Al-Zr composite phase as a heterogeneous nucleation core. The subsequent addition of Si and B facilitates the interaction of Si and Zr at the interface of the heterogeneous nucleation core. The formation of the Zr-Si composite transition phase enhances the interfacial bonding between the Al-Zr composite phase and the Al matrix, preventing the agglomeration of heterogeneous nucleation cores. The addition of Mg further refines the grain size. The subsequent addition of Mg facilitates the formation of a Mg-Si composite phase, which is distributed on the surface of the heterogeneous nucleation core to form a core-shell structure. The further addition of Cr facilitates its bonding with the Mg-Si composite phase to form a composite phase with Mg. In other words, through chemical anchoring and coherent interfaces, the segregation and agglomeration of Mg are hindered, effectively improving the uniformity and dispersion stability of Mg, thereby ensuring the improved processing performance of aluminum materials for lens barrels.

[0024] In one embodiment, the additive further includes the following components in percentage amounts: Fe ≤ 0.15%; Cu ≤ 0.10%; Zn ≤ 0.10%. It is understood that Fe, Cu, and Zn are primarily introduced as impurities from pure aluminum ingots. In practice, aluminum materials used for lens barrels may not contain additional Fe, Cu, and Zn; rather, the focus is on limiting the Fe, Cu, and Zn content of the pure aluminum ingot. Furthermore, the aluminum materials used for lens barrels also contain impurities, with an impurity content ≤ 0.15%, and the content of any single impurity substance ≤ 0.05%.

[0025] This application also provides a method for preparing aluminum material for lens barrels, used to prepare aluminum material for lens barrels according to any of the above embodiments. The above-described method for preparing aluminum material for lens barrels includes the following steps: obtaining pure aluminum ingots and additives; performing a melting operation on the pure aluminum ingots and additives to obtain aluminum melt; performing a casting operation on the aluminum melt to obtain aluminum alloy ingots; and performing an extrusion operation on the aluminum alloy ingots to obtain aluminum material for lens barrels.

[0026] It can be understood that pure aluminum ingots are industrial pure aluminum ingots with a purity of ≥99.0%, such as Al99.0, Al99.7 and Al99.9, with Al99.97 being preferred. Pure aluminum ingots are conventional aluminum ingots used to process aluminum lens barrels for automotive lenses, so they will not be discussed further here.

[0027] To better understand the preparation method of the aluminum material for the lens barrel of this application, the following further explains the preparation method of the aluminum material for the lens barrel of this application: One embodiment of the method for preparing aluminum material for a lens barrel includes the following steps: S100, to obtain pure aluminum ingots and additives.

[0028] S200: The pure aluminum ingot and additives are smelted to obtain aluminum melt.

[0029] S300: Casting operation is performed on the aluminum melt to obtain aluminum alloy ingot.

[0030] S400: Extrusion operation is performed on aluminum alloy ingots to obtain aluminum material for lens barrels.

[0031] In one embodiment, a smelting operation is performed on pure aluminum ingots and additives under ultrasonic vibration conditions. Further, the ultrasonic power is 800 W to 1200 W. Further, the ultrasonic frequency is 20 kHz to 25 kHz.

[0032] In one embodiment, the smelting operation of pure aluminum ingots and additives includes the following steps: Zr and pure aluminum ingots were smelted once to obtain a pre-melted body. Further, the temperature was 710℃~725℃. Further, the holding time was 10min~20min. This process promotes the preferential miscibility of Zr with Al to form a nanoscale Al-Zr composite phase, which can act as a heterogeneous nucleation core for non-spontaneous nucleation during solidification, laying the foundation for the formation of a core-shell structure.

[0033] Furthermore, B and Si are sequentially added to the premelted body for a secondary melting treatment. Further, the temperature is 730℃~745℃. Further, the holding time is 12min~20min. It can be understood that B forms a composite phase with Al, which is beneficial for grain refinement; Si, mixed in Al, can be dissolved and dispersed in the Al matrix, forming a Mg-Si composite phase during solidification and thus forming a heterogeneous nucleation core, achieving a core-shell structure.

[0034] Furthermore, Mg is added to the pre-melted body after the secondary melting treatment for a third melting treatment. The temperature is further set at 750℃~760℃, and the holding time is 18min~30min. It can be understood that after Si is fully dissolved and dispersed in the Al matrix, the addition of Mg allows Mg to form a composite phase with Si, achieving rapid mixing of Mg. Furthermore, the Mg-Si composite phase forms on a heterogeneous nucleation core during solidification, achieving a core-shell structure. This effectively anchors Mg chemically. Additionally, the remaining Mg is fixed at the lattice nodes of the Mg-Si composite phase, effectively improving the uniformity and dispersion stability of Mg, thereby ensuring improved processing performance of the aluminum material used in the lens barrel.

[0035] Furthermore, the remaining additives in the premelted body after the three melting processes are subjected to a fourth melting process. Further, the temperature is 740℃~750℃. Further, the holding time is 15min~25min. It can be understood that the Al-Cr composite phase formed by Cr and Al preferentially distributes on the grain boundaries during solidification to fix grain boundary vacancies, further hindering the movement of Mg on the grain boundaries, further improving the uniformity and dispersion stability of Mg, and thus ensuring improved processing performance of the aluminum material for the lens barrel.

[0036] It is understandable that by controlling the timing and order of adding substances such as Zr, B, Si, Mg and Cr during the smelting of aluminum for the lens barrel, the uniform dispersion and dispersion stability of Mg can be effectively achieved, that is, the segregation and aggregation of Mg can be reduced.

[0037] In one embodiment, pure aluminum ingots and additives are smelted under magnetic stirring conditions. Further, the magnetic stirring speed is 300 rpm to 450 rpm.

[0038] In one embodiment, the smelting operation of pure aluminum ingots and additives includes the following steps: Zr and pure aluminum ingots were smelted once at a magnetic stirring speed of 250 rpm to obtain a pre-melted body. It can be understood that a magnetic stirring speed of 250 rpm to 300 rpm promotes low-speed, high-shear stirring during the melting of Zr and pure aluminum ingots, effectively shearing and breaking up Zr agglomerates, reducing the coarsening of the already formed Al-Zr composite phase due to collisions, effectively controlling the grain size of the Zr-Al composite phase, and reducing slag entrapment, thus ensuring the machinability of the aluminum material used in lens barrels.

[0039] Furthermore, under magnetic stirring speed of 400 rpm to 450 rpm, B and Si are sequentially added to the premelt for a secondary melting process. This process achieves sufficient dispersion of B and Al to form an Al-B composite phase, which is beneficial for grain refinement. The high stirring speed promotes the rapid and sufficient diffusion of Si, forming a stable solid solution state, providing solute reserves for the formation of the Mg-Si composite phase, and facilitating the formation of a core-shell structure on the heterogeneous nucleation core surface of the Mg-Si composite phase and the Zr-Al composite phase.

[0040] Furthermore, Mg was added to the pre-melted material after the second melting process for a third melting process at a magnetic stirring speed of 300 rpm to 350 rpm. It can be understood that gentle stirring promotes the formation of Mg-Si composite phase between Mg and Si, reducing the direct formation of coarse Mg-Si composite phase, and low-speed stirring reduces surface renewal of the melt, thus lowering the Mg burn-off rate.

[0041] Furthermore, the remaining additives in the premelted body after three melting processes were subjected to a fourth melting process while the magnetic stirring speed was 360 rpm to 400 rpm. It can be understood that this achieved uniform melting of the remaining additives and sufficiently refined doping distribution of the Al-Zr composite phase, Mg-Si composite phase, and Al-B composite phase, reducing grain coarsening after viscosity increase.

[0042] Furthermore, magnetic stirring was stopped, and the premelted material was cooled to the casting temperature at a cooling rate of 3℃ / min to 6℃ / min. This is understandable as it facilitates the inhibition of segregation and aggregation of Mg through chemical anchoring and coherent interfaces.

[0043] In one embodiment, the aluminum melt is cast under ultrasonic vibration conditions. Further, the ultrasonic power is 1200~2100W, and the ultrasonic frequency is 16 kHz~20 kHz.

[0044] In one embodiment, the aluminum molten material is cast using the following steps: the ingot mold is preheated to 200°C~210°C; then, the temperature of the aluminum molten material is controlled at 680°C~700°C, and it is poured into the ingot mold at a casting speed of 60 mm / min~80 mm / min, followed by water cooling. Further, the water flow rate is 2 L / min~3.5 L / min.

[0045] In one embodiment, the aluminum alloy ingot is extruded, and the specific operation steps are as follows: the aluminum alloy ingot is heated to 420℃~450℃ at room temperature and held for 1.5h~2h; then, it is preheated to 450±5℃ for extrusion, and the extrusion outlet temperature is maintained at 480℃~500℃. Then, the aluminum material for the lens barrel extruded from the extrusion outlet is quenched and cooled at a cooling rate of 200℃ / min~220℃ / min.

[0046] In one embodiment, after the extrusion operation of the aluminum alloy ingot, the processing method for the aluminum material used in the lens barrel further includes the following step: aging the aluminum material used in the lens barrel. Further, the specific steps for aging the aluminum material used in the lens barrel are as follows: The aluminum material used for the lens barrel undergoes solution treatment. Further, the temperature is 530℃~540℃. Further, the holding time is 1.5h~2h. Further, after the holding time is met, it is quenched in ice-salt water at a cooling rate <100℃ / s. Further, the cooling rate is 80℃ / s~95℃ / s. It can be understood that during this stage, the Al-Zr composite phase remains stable, without grain coarsening or dissolution, and promotes the uniform diffusion of the Si-Mg composite phase around the Al-Zr composite phase, creating conditions for the subsequent formation of the core-shell structure; however, if the temperature and holding time are too long, it will cause grain coarsening of the Al-Zr composite phase.

[0047] Furthermore, the aluminum material used for the lens barrel undergoes core stabilization treatment. Further, the temperature is 118℃~122℃. Further, the holding time is 2h~2.2h. Further, the temperature is increased from room temperature to 118℃~122℃. Further, the heating rate is 2℃ / min~3℃ / min. It can be understood that at a temperature of 118℃~122℃, the Si-Mg composite phase is slowly anchored on the surface of the Al-Zr composite phase, initially forming a core-shell structure, thus reducing the local inhomogeneity of the Si-Mg composite phase on the surface of the Al-Zr composite phase.

[0048] Furthermore, the aluminum material used for the lens barrel after nuclear stabilization treatment undergoes interfacial bonding treatment. Further, the temperature is 158℃~163℃. Further, the holding time is 3.8h~4.2h. Further, the temperature is increased from the nuclear stabilization treatment temperature to the interfacial bonding treatment temperature. Further, the heating rate is 5℃ / min~6℃ / min. It can be understood that at this point, the Al-Cr composite phase formed by Cr at the grain boundaries has "pinned" the grain boundaries, hindering the rapid migration of Mg and ensuring the continued uniform growth of the Mg-Si composite phase within the shell.

[0049] Furthermore, the aluminum material for the lens barrel after the interface bonding treatment is subjected to a strengthening and stabilizing treatment. Further, the temperature is 178℃~185℃. Further, the holding time is 5.8h~6.5h. Further, the temperature is increased from the interface bonding treatment temperature to the strengthening and stabilizing treatment temperature. Further, the heating rate is 10℃ / min~12℃ / min. It can be understood that rapidly completing the formation of the Mg-Si composite phase and promoting the dissolution of the unstable Mg-Si composite phase to reform a stable Mg-Si composite phase core-shell structure, although causing a slight loss in the hardness of the aluminum material for the lens barrel, effectively improves the long-term dimensional stability of the aluminum material for the lens barrel.

[0050] It is understandable that after solid solution treatment, core stabilization treatment, interface bonding treatment and strengthening stabilization treatment, the aluminum material used for lens barrels effectively and gradually forms a small-grained Al-Zr-Si-Mg shell-core structure, which reduces the segregation and aggregation of Mg and effectively alleviates the "grain boundary embrittlement" problem caused by the segregation and aggregation of Mg in the aluminum material used for lens barrels, thereby effectively improving the processing performance of the aluminum material used for lens barrels.

[0051] It should be noted that if the order of addition of Al, Zr, Si, Mg and Cr and the processing parameters are not controlled during the smelting process to achieve uniform dispersion of the Mg-Si composite phase and the Al-Zr composite phase in the Al substrate, it will still be difficult to achieve the effective formation of the Al-Zr-Si-Mg shell-core structure by aging treatment alone. This will also make it difficult to alleviate the "grain boundary embrittlement" problem caused by the grain boundary segregation and aggregation of Mg in the aluminum material used for lens barrels.

[0052] In one embodiment, the aluminum alloy ingot is directly switched to solution treatment after being quenched and cooled to the solution treatment temperature during the extrusion operation.

[0053] In one embodiment, after the step of strengthening and stabilizing the aluminum material for the lens barrel after the interface bonding treatment, the method further includes the following step: cooling the aluminum material for the lens barrel to room temperature in a furnace.

[0054] It should be noted that the processing methods for aluminum materials used in the lens barrel are not limited to the steps mentioned in this application. This application only describes the main steps; the remaining steps are routine and necessary, and therefore will not be elaborated upon. For example, after the casting operation of the molten aluminum, a homogenization annealing step is also included. Similarly, after the step of performing a fourth melting process on the remaining additives in the pre-melted material after three melting processes, a refining and degassing step is also included. Furthermore, after water cooling in the casting operation, a solidification and demolding step is also included.

[0055] This application also provides a lens barrel, which is processed from the aluminum material for lens barrel prepared by the preparation method of any of the above embodiments.

[0056] Compared with the prior art, the present invention has at least the following advantages: The aluminum material for the lens barrel of this invention has a Mg content of 4.5%~5.6%, effectively achieving lightweight and high strength. In addition, 0.1%~0.2% Zr, 0.3%~0.8% Si, 0.003%~0.008% B, 4.5%~5.6% Mg, and 0.1%~0.18% Cr are added. Specifically, the addition order is Zr→Si and B→Mg→Cr. Zr preferentially dissolves in Al, which is beneficial for forming an Al-Zr composite phase as a heterogeneous nucleation core. The subsequent addition of Si and B facilitates the interaction of Si with the heterogeneous nucleation core at the interface. Zr forms a Zr-Si composite transition phase, enhancing the interfacial bonding between the Al-Zr composite phase and the Al matrix, and preventing heterogeneous nucleation core agglomeration. B is beneficial for further refining the grain size. Then, the addition of Mg is beneficial for Mg and Si to form a Mg-Si composite phase distributed on the surface of the heterogeneous nucleation core to form a core-shell structure. Further addition of Cr is beneficial for bonding to the Mg-Si composite phase to form a composite phase with Mg. That is, through chemical anchoring and coherent interface, the segregation and agglomeration of Mg are hindered, effectively improving the uniformity and dispersion stability of Mg, thereby ensuring the improvement of the processing performance of aluminum materials for lens barrels.

[0057] The embodiments of this application will be described in detail below with reference to examples. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. For experimental methods in the following embodiments where specific conditions are not specified, please refer to the guidelines given in this application, or follow experimental manuals or conventional conditions in the art, or follow the conditions recommended by the manufacturer, or refer to experimental methods known in the art.

[0058] In the specific embodiments described below, the measurement parameters involving raw material components may have slight deviations within the weighing accuracy range unless otherwise specified. Temperature and time parameters are subject to acceptable deviations due to instrument testing accuracy or operational precision.

[0059] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0060] Example 1 Formula: 0.1% Zr; 0.3% Si; 0.003% B; 4.5% Mg; 0.1% Cr; Fe≤0.15%; Cu≤0.10; Zn≤0.10; Al balance; other unspecified elements are considered unavoidable impurities, with a total content of less than 0.15% and a single element content of ≤0.05%.

[0061] Example 2 Formula: 0.12% Zr; 0.5% Si; 0.005% B; 4.8% Mg; 0.12% Cr; Fe≤0.15%; Cu≤0.10; Zn≤0.10; Al balance; other unspecified elements are considered unavoidable impurities, with a total content of less than 0.15% and a single element content of ≤0.05%.

[0062] Example 3 Formula: 0.18% Zr; 0.6% Si; 0.006% B; 5.2% Mg; 0.16% Cr; Fe≤0.15%; Cu≤0.10; Zn≤0.10; Al balance; other unspecified elements are considered unavoidable impurities, with a total content of less than 0.15% and a single element content of ≤0.05%.

[0063] Example 4 Formula: 0.2% Zr; 0.8% Si; 0.008% B; 5.6% Mg; 0.18% Cr; Fe≤0.15%; Cu≤0.10; Zn≤0.10; Al balance; other unspecified elements are considered unavoidable impurities, with a total content of less than 0.15% and a single element content of ≤0.05%.

[0064] Example 5 Zr and pure aluminum ingots were melted at a magnetic stirring speed of 250 rpm at a temperature of 710°C for 20 min. The magnetic stirring speed was then adjusted to 400 rpm, and B and Si were added sequentially and melted at a temperature of 730°C for 20 min. Then, the magnetic stirring speed was adjusted to 300 rpm, and Mg was added and melted at a temperature of 750°C for 30 min. The magnetic stirring speed was then adjusted to 360 rpm, and the remaining additives were added and melted at a temperature of 740°C for 25 min. Finally, the magnetic stirring was stopped, and the melt was cooled to the temperature of the melt used for casting at a cooling rate of 3°C / min.

[0065] Example 6 Zr and pure aluminum ingots were melted at a magnetic stirring speed of 280 rpm at a temperature of 720°C for 15 min. The magnetic stirring speed was then adjusted to 420 rpm, and B and Si were added sequentially and melted at a temperature of 740°C for 16 min. Then, the magnetic stirring speed was adjusted to 320 rpm, and Mg was added and melted at a temperature of 755°C for 25 min. The magnetic stirring speed was then adjusted to 380 rpm, and the remaining additives were added and melted at a temperature of 745°C for 20 min. Finally, the magnetic stirring was stopped, and the melt was cooled to the temperature of the melt used for casting at a cooling rate of 5°C / min.

[0066] Example 7 Zr and pure aluminum ingots were melted at a magnetic stirring speed of 300 rpm at a temperature of 725°C for 10 min. The magnetic stirring speed was then adjusted to 450 rpm, and B and Si were added sequentially and melted at a temperature of 745°C for 12 min. Then, the magnetic stirring speed was adjusted to 350 rpm, and Mg was added and melted at a temperature of 760°C for 18 min. The magnetic stirring speed was then adjusted to 400 rpm, and the remaining additives were added and melted at a temperature of 750°C for 15 min. Finally, the magnetic stirring was stopped, and the melt was cooled to the temperature of the melt used for casting at a cooling rate of 6°C / min.

[0067] Example 8 The ingot mold was preheated to 200°C with an ultrasonic power of 1200W and an ultrasonic frequency of 16 kHz. Then, the melt at 680°C was poured into the ingot mold at a casting speed of 60 mm / min. The mold was then water-cooled at a water flow rate of 2 L / min to obtain an aluminum alloy ingot.

[0068] Example 9 The ingot mold was preheated to 205°C with an ultrasonic power of 1800W and an ultrasonic frequency of 18kHz. Then, molten material at 690°C was poured into the ingot mold at a casting speed of 70mm / min. The mold was then water-cooled at a flow rate of 3L / min to obtain an aluminum alloy ingot.

[0069] Example 10 The ingot mold was preheated to 210°C with an ultrasonic power of 2100W and an ultrasonic frequency of 20kHz. Then, molten material at 700°C was poured into the ingot mold at a casting speed of 80 mm / min. The mold was then water-cooled at a flow rate of 3.5L / min to obtain an aluminum alloy ingot.

[0070] Example 11 The aluminum alloy ingot is heated to 420°C at room temperature and held for 2 hours. Then, it is preheated to 450°C and extruded while maintaining the extrusion outlet temperature at 480°C. The aluminum material for the lens barrel is then quenched and cooled at a rate of 200°C / min until it reaches a temperature of 540°C, thus obtaining the aluminum material for the lens barrel.

[0071] Example 12 The aluminum alloy ingot is heated to 435°C at room temperature and held for 1.8 hours. Then, it is preheated to 450°C and extruded while maintaining the extrusion outlet temperature at 490°C. The aluminum material for the lens barrel is then quenched and cooled at a rate of 210°C / min until it reaches a temperature of 535°C, thus obtaining the aluminum material for the lens barrel.

[0072] Example 13 The aluminum alloy ingot is heated to 450°C at room temperature and held for 1.5 hours. Then, it is preheated to 450°C and extruded while maintaining the extrusion outlet temperature at 500°C. The aluminum material for the lens barrel is then quenched and cooled at a rate of 220°C / min until it reaches a temperature of 540°C, thus obtaining the aluminum material for the lens barrel.

[0073] Example 14 The extruded and cooled aluminum material for the lens barrel was solution-treated at 530℃ for 2 hours. After the required holding time was met, it was quenched in ice-salt water at a cooling rate of 80℃ / s. Then, the aluminum material for the lens barrel was placed in a furnace and heated to 118℃ at a rate of 2℃ / min and held for 2.2 hours. Next, the furnace temperature was raised to 158℃ at a rate of 5℃ / min and held for 4.2 hours. Finally, the furnace temperature was raised to 178℃ at a rate of 10℃ / min and held for 6.5 hours.

[0074] Example 15 The extruded and cooled aluminum material for the lens barrel was solution-treated at 535℃ for 1.6 hours. After the required holding time was met, it was quenched in ice-salt water at a cooling rate of 90℃ / s. Then, the aluminum material for the lens barrel was placed in a furnace and heated to 120℃ at a rate of 2.5℃ / min and held for 2 hours. Next, the furnace temperature was raised to 160℃ at a rate of 5.5℃ / min and held for 4 hours. Finally, the furnace temperature was raised to 180℃ at a rate of 11℃ / min and held for 6 hours.

[0075] Example 16 The extruded and cooled aluminum material for the lens barrel was solution-treated at 540℃ for 1.5 hours. After the required holding time was met, it was quenched in ice-salt water at a cooling rate of 80℃ / s. Then, the aluminum material for the lens barrel was placed in a furnace and heated to 120℃ at a rate of 3℃ / min and held for 2 hours. Then, the furnace temperature was raised to 160℃ at a rate of 5℃ / min and held for 4 hours. Finally, the furnace temperature was raised to 180℃ at a rate of 10℃ / min and held for 6 hours.

[0076] Example 17 The extruded and cooled aluminum material for the lens barrel was solution-treated at 40℃ for 1.5 hours. After the required holding time was met, it was quenched in ice-salt water at a cooling rate of 95℃ / s. Then, the aluminum material for the lens barrel was placed in a furnace and heated to 122℃ at a rate of 3℃ / min and held for 2 hours. Then, the furnace temperature was raised to 163℃ at a rate of 6℃ / min and held for 3.8 hours. Finally, the furnace temperature was raised to 185℃ at a rate of 12℃ / min and held for 6.5 hours.

[0077] The formulations of Examples 1-4 were used in the smelting of Examples 5-7, then in the casting of Examples 8-10, then in the extrusion molding of Examples 11-13, and finally in the solution treatment and aging treatment of Examples 14-17 to obtain aluminum materials for lens barrels.

[0078] The aluminum material for the lens barrel obtained by combining any embodiment is subjected to the following tests, wherein the test methods are as follows: tensile strength, yield strength, elongation after fracture and hardness of the aluminum material for the lens barrel are tested in accordance with GB / T 228.1-2021 and GB / T 4340.1-2009. The test results showed that the tensile strength of the aluminum material used for each lens barrel was greater than 490 MPa; the yield strength was greater than 430 MPa; the elongation after fracture was greater than 15%; and the Vickers hardness was greater than 140 HV. In particular, the aluminum material used for the lens barrel prepared by the combination of Examples 3-6-9-11-16 had the best comprehensive performance.

[0079] The above embodiments merely illustrate several implementation methods of this application to facilitate a detailed understanding of the technical solutions of this application, but should not be construed as limiting the scope of protection of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Furthermore, it should be understood that after reading the above teachings of this application, those skilled in the art can make various alterations or modifications to this application, and the equivalent forms obtained also fall within the scope of protection of this application. It should also be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this patent application should be determined by the content of the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. An aluminum material for a lens barrel, characterized in that, It should include at least the following components in percentage form: additive: Mg 4.5%~5.6%; Si 0.3%~0.8%; Cr 0.1%~0.18%； Zr 0.1%~0.2%； B 0.003%~0.008%； Principal components: Al balance; The aluminum material used for the lens barrel of the vehicle-mounted lens contains at least 92% Al.

2. The aluminum material for the lens barrel according to claim 1, characterized in that, The additive also includes the following components in percentage amounts: Fe ≤0.15%; Cu ≤0.10; Zn ≤0.

10.

3. The aluminum material for the lens barrel according to claim 1, characterized in that, The aluminum material used for the lens barrel also contains impurities, the impurity content is ≤0.15%, and the content of a single substance in the impurities is ≤0.05%.

4. A method for preparing aluminum material for a lens barrel, characterized in that, The method for preparing the aluminum material for the lens barrel according to any one of claims 1 to 5 comprises the following steps: To obtain pure aluminum ingots and additives; The pure aluminum ingot and additives are smelted to obtain molten aluminum. The molten aluminum is cast to obtain an aluminum alloy ingot; The aluminum alloy ingot is extruded to obtain aluminum material for the lens barrel.

5. The method for preparing aluminum material for lens barrels according to claim 4, characterized in that, The pure aluminum ingot and additives are smelted under magnetic stirring conditions.

6. The method for preparing aluminum material for lens barrels according to claim 4, characterized in that, The pure aluminum ingot and additives are smelted under ultrasonic vibration conditions.

7. The method for preparing aluminum material for lens barrels according to claim 4, characterized in that, The smelting operation of the pure aluminum ingot and additives includes the following steps: To obtain pure aluminum ingots and additives; Zr and pure aluminum ingots are smelted once to obtain a pre-melted body; B and Si are added sequentially to the premelted body for a secondary melting process; Mg is added to the premelted body after the secondary melting process for a third melting process; The remaining additives in the premelted body after the three melting processes are subjected to a fourth melting process.

8. The method for preparing aluminum material for lens barrels according to claim 4, characterized in that, The aluminum melt is cast under ultrasonic vibration conditions.

9. The method for preparing aluminum material for lens barrels according to claim 4, characterized in that, After the step of extruding the aluminum alloy ingot, the processing method of the aluminum material for the lens barrel further includes the following steps: The aluminum material used for the lens barrel is subjected to aging treatment.

10. A lens barrel, characterized in that, The aluminum material for the lens barrel is prepared by the method described in any one of claims 4 to 9 and then processed.