Aluminum alloy and preparation method thereof

Abstract

The invention provides an aluminum alloy and a preparation method thereof, and the aluminum alloy comprises the following elements in percentage by mass: 0.30-0.50 wt.% of Si, 0.30-0.50 wt.% of Fe, 0.30-0.50 wt.% of Cu, 0.30-0.50 wt.% of Mn, 0.30-0.50 wt.% of Mg, 0.30-0.50 wt.% of Zn, 0.30 0.45 wt.% to 0.65 wt.% of Fe; 0.40 wt.% to 0.80 wt.% of Cu; mn: 1.25 wt.% to 1.35 wt.%; less than or equal to 0.05 wt% of Mg and less than or equal to 0.10 wt% of %, 0.02 wt.% to 0.05 wt.% of Ti; other single impurities: less than or equal to 0.05 wt.%; the total of other impurities is less than or equal to 0.15 wt.%; and Al: the balance. According to the aluminum alloy and the preparation method thereof, the content of high-strength elements in the aluminum alloy is increased, the content of Mn elements and the content of Fe elements are increased, meanwhile, the Si element is added and matched with the Fe element, the strength and hardness of the aluminum alloy can be effectively improved, and especially the remarkable effect is achieved after cold machining such as rolling; and meanwhile, it is guaranteed that the aluminum alloy has good ductility, the tensile strength of the aluminum alloy is larger than 150 MPa, the ductility of the aluminum alloy is lower than 17%, and the aluminum alloy has good mechanical performance.

Description

Technical Field

[0001] The present invention relates to the field of aluminum alloys, in particular to an aluminum alloy and a preparation method thereof. Background Art

[0002] With the needs of the development of the times, the battery industry is also developing rapidly, the technical requirements for battery cooling systems are becoming higher and higher, and the battery's liquid cooling system also needs continuous breakthroughs.

[0003] Liquid cooling plates are made of aluminum plates, generally 3003 aluminum plates. The tensile strength cannot meet the production strength standards for liquid cooling plates. Therefore, some special elements are added to the 3003 aluminum alloy to improve its performance and application range. While the tensile strength is increased, the elongation decreases, which cannot meet the minimum elongation requirement for liquid cooling plate production. At the same time, the alloy material needs to be heated and rolled, that is, hot rolling, when used as the raw material for liquid cooling plates. This process has high energy consumption, slow production efficiency, and high process costs.

[0004] Therefore, it is necessary to provide an aluminum alloy and a preparation method thereof to overcome the above-mentioned defects. Summary of the Invention

[0005] The purpose of the present invention is to provide an aluminum alloy and a preparation method thereof, which can ensure that the tensile strength of the aluminum alloy can be achieved while taking into account the elongation, so that it meets the processing and production requirements of the aluminum alloy in the battery cooling system.

[0006] According to one aspect of the present invention, an aluminum alloy is provided, comprising Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, wherein the mass percentages of the components are as follows: Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤ 0.05 wt.%, Zn ≤ 0.10 wt.%; Ti: 0.02 wt.% to 0.05 wt.%; other individual impurities: ≤ 0.05 wt.%; other impurities in total: ≤ 0.15 wt.%; Al: the remainder; an α-Fe2SiAl8 phase is formed in the aluminum alloy, which has a second strengthening effect on the alloy; the Cu element can assist in solid solution strengthening of the aluminum alloy structure, effectively improving the strength and hardness of the aluminum alloy. The aluminum alloy prepared by the above scheme has a tensile strength greater than 150 MPa and an elongation greater than 17%, meeting the production requirements of enterprise standards for liquid cooling plates. Table 1 shows a comparison table of the mass percentages of the components of the industry's 3003 aluminum alloy and the mass percentages of the components of the aluminum alloy of the present invention.

[0007] Table 1

[0008]

[0009] Preferably, an aluminum alloy comprises Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al, with the following mass percentages: Si: 0.35-0.45 wt.%; Fe: 0.50-0.60 wt.%; Cu: 0.45-0.70 wt.%; Mn: 1.25-1.35 wt.%; Mg: ≤0.05 wt.%, Zn ≤0.10 wt.%; Ti: 0.02-0.05 wt.%; other individual impurities: ≤0.05 wt.%; other impurities combined: ≤0.15 wt.%; Al: the remainder. The aluminum alloy prepared using the above scheme has a tensile strength greater than 150 MPa and an elongation greater than 17%, meeting the industry standard for liquid cooling plate production.

[0010] Preferably, an aluminum alloy comprises Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al, with the following mass percentages: Si: 0.30-0.50 wt.%; Fe: 0.45-0.65 wt.%; Cu: 0.40-0.80 wt.%; Mn: 1.30 wt.%; Mg: ≤0.05 wt.%, Zn ≤0.10 wt.%; Ti: 0.02-0.05 wt.%; other individual impurities: ≤0.05 wt.%; other impurities combined: ≤0.15 wt.%; Al: the remainder. The aluminum alloy prepared using this scheme has a tensile strength greater than 150 MPa and an elongation greater than 17%, meeting the industry standard for liquid cooling plate production.

[0011] Preferably, an aluminum alloy comprises Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al, with the following mass percentages: Si: 0.30-0.50 wt.%; Fe: 0.55 wt.%; Cu: 0.40-0.80 wt.%; Mn: 1.25-1.35 wt.%; Mg: ≤0.05 wt.%, Zn ≤0.10 wt.%; Ti: 0.02-0.05 wt.%; other individual impurities: ≤0.05 wt.%; other impurities combined: ≤0.15 wt.%; Al: the remainder. The aluminum alloy prepared using this scheme has a tensile strength greater than 150 MPa and an elongation greater than 17%, meeting the industry standard for liquid cooling plate production.

[0012] Preferably, an aluminum alloy comprises Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al, with the following mass percentages: Si: 0.40 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤ 0.05 wt.%, Zn ≤ 0.10 wt.%; Ti: 0.02 wt.% to 0.05 wt.%; other individual impurities: ≤ 0.05 wt.%; other impurities combined: ≤ 0.15 wt.%; Al: the remainder. The aluminum alloy prepared using the above scheme has a tensile strength greater than 150 MPa and an elongation greater than 17%, meeting the industry standard for liquid cooling plate production.

[0013] Preferably, an aluminum alloy comprises Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al, with the following mass percentages: Si: 0.30-0.50 wt.%; Fe: 0.45-0.65 wt.%; Cu: 0.60 wt.%; Mn: 1.25-1.35 wt.%; Mg: ≤0.05 wt.%, Zn ≤0.10 wt.%; Ti: 0.02-0.05 wt.%; other individual impurities: ≤0.05 wt.%; other impurities combined: ≤0.15 wt.%; Al: the remainder. The aluminum alloy prepared using this scheme has a tensile strength greater than 150 MPa and an elongation greater than 17%, meeting the industry standard for liquid cooling plate production.

[0014] According to another aspect of the present invention, there is provided a method for preparing an aluminum alloy, comprising the following steps:

[0015] S1: Prepare the raw materials required for the preparation according to the ratio;

[0016] S2: smelting, the smelting temperature is 750~770℃;

[0017] S3: Composition adjustment, adjusting the composition ratio of each element according to the mass percentage of the alloy described in claims 1 to N;

[0018] S4: refining, refining temperature 750-760℃;

[0019] S5: furnace conduction, furnace conduction after the composition is qualified, furnace conduction temperature is 750-760℃;

[0020] S6: Let it stand, conduct the furnace and then refine it, then let it stand, set the electric heating temperature at 800-830℃, refine it every 2 hours, and not less than twice per furnace;

[0021] S7: Degassing, the degassing gas is nitrogen, the nitrogen pressure is ≥0.4Mpa, and the nitrogen oxygen content is ≤30ppm;

[0022] S8: Filter;

[0023] S9: Casting and rolling, water temperature ≤ 35°C, water pressure 0.2-0.4 MPa, casting and rolling speed 0.55-0.65 m / min;

[0024] S10: Quenching.

[0025] The present invention provides an aluminum alloy and a preparation method thereof. The aluminum alloy improves the material strength by increasing the content of high-strength elements in the aluminum alloy, increasing the content of Mn and Fe elements, and simultaneously considers the addition of Si element, which is combined with Fe element to form an α-Fe2SiAl8 phase in the aluminum alloy, forming a second strengthening effect on the alloy. The addition of Cu element can assist in solid solution strengthening of the aluminum alloy structure, and can effectively improve the strength and hardness of the aluminum alloy, especially after cold processing such as rolling. At the same time, it also ensures that the aluminum alloy has good elongation, so that its tensile strength is greater than 150 MPa and the elongation is not less than 17%. It has good mechanical properties and helps to better realize its application in battery cooling systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] Figure 1 This is a line graph showing changes in tensile strength of each group of aluminum alloys in Example 1;

[0028] Figure 2 This is a line graph showing the elongation change of each group of aluminum alloys in Example 1;

[0029] Figure 3 This is a line graph showing changes in tensile strength of each group of aluminum alloys in Example 2;

[0030] Figure 4 This is a line graph showing the elongation changes of each group of aluminum alloys in Example 2. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. As used herein, "one" not only means "only one" but also "more than one."

[0033] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0034] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0035] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0037] Liquid cooling plates are made of aluminum plates, generally 3003 aluminum plates. The tensile strength of 3003 aluminum plates is around 120 MPa and the elongation is 20% to 30%, which cannot meet the production strength standard for tensile strength (tensile strength requirements are above 150 MPa and elongation is 17%). Therefore, the industry often uses 3003 aluminum alloy to increase the mass percentage of special elements such as Cu and Mn to improve its performance and application range. While the tensile strength is improved, the elongation will also decrease, which cannot meet the minimum elongation requirement of liquid cooling plate production. At the same time, when used as the raw material of the liquid cooling plate, the alloy material also needs to be heated and rolled, that is, hot rolling process, which has high energy consumption, slow production efficiency, and high process cost. Therefore, this embodiment adjusts its component content to improve the strength of the raw material while taking into account the elongation, ensuring that the aluminum alloy meets the production standard for liquid cooling plate materials in the field of new energy batteries.

[0038] As shown in Table 1, this embodiment provides the mass percentages of various elements in the 3003 grade aluminum alloy in the industry and the mass percentages of various elements in the aluminum alloy given in this application. This embodiment provides an aluminum alloy comprising Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, with the mass percentages of each component being Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 0. :1.25wt.%~1.35wt.%;Mg:≤0.05wt.%、Zn≤0.10wt.%;Ti:0.02wt.%~0.05wt.%;Other individual impurities:≤0.05wt.%;Total other impurities:≤0.15wt.%;Al: balance;α-Fe2SiAl8 phase is formed in the aluminum alloy, which forms a second strengthening effect on the alloy; Cu element can assist in solid solution strengthening of the aluminum alloy structure, effectively improving the strength and hardness of the aluminum alloy.

[0039] Table 1

[0040]

[0041] This embodiment also provides a method for preparing an aluminum alloy, comprising the following steps:

[0042] S1: Prepare the required raw materials according to the element composition ratio in Table 1;

[0043] S2: Melting: Take part of the raw materials prepared in S1 and melt them at a temperature of 750-770°C, stirring for 5 minutes;

[0044] S3: Composition adjustment: adjust the composition ratio of each element according to the mass percentage of the aluminum alloy described in Table 1 (i.e., take the remaining part of the material and add it), heat for half an hour and stir for 5 minutes;

[0045] S4: Refining, refining temperature 750-760℃, after refining, let it stand for 5 minutes to skim off the slag;

[0046] S5: furnace conduction, furnace conduction after the composition is qualified, furnace conduction temperature is 750-760℃;

[0047] S6: Standing, after the furnace is guided and then refined, standing, the refining gas is nitrogen, liquid refining is adopted, the electric heating temperature is set at 800-830℃, standing after refining, refining once every 2 hours, and no less than twice per furnace;

[0048] S7: Degassing, the degassing gas is nitrogen, the nitrogen pressure is ≥0.4Mpa, the nitrogen oxygen content is ≤30ppm, the degassing box slag is cleaned as needed, the frequency is not less than 1 time / hour, the amount of titanium wire added needs to be determined according to the plate speed and addition rate;

[0049] S8: Filtration, preheat the filter plate before use, and bake it with a torch until it turns red before insertion;

[0050] S9: Casting and rolling, water temperature ≤ 35°C, water pressure 0.2-0.4 MPa, casting and rolling speed 0.55-0.65 m / min;

[0051] S10: Quenching.

[0052] This example is based on 3003 aluminum alloy and incorporates the production requirements of liquid cooling plates (tensile strength requirements greater than 150 MPa and elongation no less than 17%). The contents of elements such as Cu, Fe, and Mn in the aluminum alloy are adjusted to meet production standards.

[0053] According to the test given in Example 1 below, the aluminum alloy (the mass percentage of each component is Si: 0.30wt.%~0.50wt.%; Fe: 0.45wt.%~0.65wt.%; Cu: 0.40wt.%~0.80wt.%; Mn: 1.25wt.%~1.35wt.%; Mg: ≤0.05wt.%, Zn ≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other individual impurities: ≤0.05wt.%; other impurities total: ≤0.15wt.%; Al: balance) has a tensile strength greater than 150MPa and an elongation greater than 17%. This application selects some test data for detailed comparative analysis, as follows.

[0054] Example 1

[0055] This example presents a 3003 aluminum alloy formulation based on industry standards. The primary approach is to increase the lower limit of high-strength elements in the aluminum alloy, by increasing the content of elements like Cu and Mn and adjusting the Fe content, thereby enhancing the material's strength. Extensive testing revealed that increasing the content of elements like Mn significantly refines the 3003 aluminum alloy's grain structure and evenly distributes precipitates within the alloy grains. Furthermore, the addition of Si, combined with Fe, forms an α-Fe2SiAl8 phase within the aluminum alloy, providing a secondary strengthening effect. The addition of Cu aids in solid solution strengthening of the aluminum alloy structure, effectively improving the alloy's strength and hardness, particularly after cold working processes such as rolling. Therefore, based on the industry's standard formulation for 3003 aluminum alloy, experiments were conducted focusing on increasing the proportions of Si, Cu, Mn, and Fe. Ultimately, based on tensile strength and elongation testing, an aluminum alloy material suitable for liquid cooling plates was determined, meeting the tensile strength requirements of greater than 150 MPa and an elongation of at least 17%.

[0056] This example selects some test data for detailed comparative analysis, as follows:

[0057] This embodiment provides 7 groups of test data during the test process and 3003 aluminum alloy as a control group to prepare aluminum alloy raw materials with different mass percentage ratios according to the above-mentioned aluminum alloy preparation method.

[0058] Experimental Groups 1 to 7: The mass percentages of Si, Cu, and Mn elements in the aluminum alloy were gradually increased compared to the control group. During the increase, the mass percentage of the Fe element was also adjusted accordingly considering the overall ratio. The aluminum alloy was prepared for each experimental group according to the above preparation method.

[0059] Control group: 3003 aluminum alloy was prepared according to the ratio of Si: 0.179wt.%, Fe: 0.576wt.%, Cu: 0.118wt.%, Mn: 1.078wt.%, Mg: 0.011wt.%, Zn: 0.011wt.%, Ti: 0.0356wt.%, and Al: 97.83wt.%.

[0060] The mass percentages of the various components in the aluminum alloys of test groups 1 to 7 and the control group are shown in Table 2.

[0061] Table 2

[0062]

[0063] The aluminum alloy coils after preparation were sampled, and five sample points were selected from each of the aluminum alloy coils prepared in test groups 1 to test groups 7 and the control group to test the tensile strength and elongation, as shown in Table 3 and Figure 1 The tensile strength test results of each test group are shown in Table 4 and Figure 2 Shown are the results of elongation tests.

[0064] Table 3

[0065]

[0066] Table 4

[0067]

[0068] According to the test results of each test group in Table 3 and Table 4, and reference Figure 1 and Figure 2 The comparison charts of the respective test data given can show that:

[0069] The average tensile strength of test group 1 was 141.26 MPa, and the average elongation was 25.81%;

[0070] The average tensile strength of test group 2 was 153.64 MPa, and the average elongation was 20.35%;

[0071] The average tensile strength of test group 3 was 159.66 MPa, and the average elongation was 19.26%;

[0072] The average tensile strength of test group 4 was 159.18 MPa, and the average elongation was 18.40%;

[0073] The average tensile strength of test group 5 was 155.04 MPa, and the average elongation was 19.04%;

[0074] The average tensile strength of test group 6 was 170.41 MPa, and the average elongation was 17.35%;

[0075] The average tensile strength of test group 7 was 180.19 MPa, and the average elongation was 14.40%;

[0076] The average tensile strength of the control group was 123.93 MPa, and the average elongation was 37.29%.

[0077] Comprehensively comparing the above test results, the tensile strength of test groups 1 to 6 was significantly improved compared with the control group, and the elongation was decreased compared with the control group. Among them: the tensile strength of test group 1 could not meet the production requirements, and the elongation of test group 7 could not meet the production requirements; the tensile strength and elongation of test groups 2 to 6 could meet the production requirements.

[0078] In summary, the aluminum alloy of this embodiment (the mass percentage of each component is Si: 0.30wt.% to 0.50wt.%; Fe: 0.45wt.% to 0.65wt.%; Cu: 0.40wt.% to 0.80wt.%; Mn: 1.25wt.% to 1.35wt.%; Mg: ≤0.05wt.%, Zn ≤0.10wt.%; Ti: 0.02wt.% to 0.05wt.%; other individual impurities: ≤0.05wt.%; other impurities in total: ≤0.15wt.%; Al: balance) has a tensile strength greater than 150MPa and an elongation greater than 17%, which meets the production requirements of the enterprise standard for liquid cooling plates.

[0079] An aluminum alloy provided in this embodiment contains Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, and the mass percentages of each component are Si: 0.30wt.%~0.50wt.%; Fe: 0.45wt.%~0.65wt.%; Cu: 0.40wt.%~0.80wt.%; Mn: 1.25wt.%~1.35wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other single impurities: ≤0.05wt.%; other impurities total: ≤0.15wt.%; Al: balance, and is prepared according to the above-mentioned aluminum alloy preparation methods S1-S10.

[0080] This embodiment also provides a method for preparing an aluminum alloy, comprising the following steps:

[0081] S1: Prepare the raw materials required for the preparation according to the ratio of Example 1;

[0082] S2: Melting: Take part of the raw materials prepared in S1 and melt them at a temperature of 750-770°C, stirring for 5 minutes;

[0083] S3: Adjust the ingredients by adjusting the ratio of each element according to the ratio of each element in Example 1 (i.e., take the remaining part of the preparation and add it), heat for half an hour and stir for 5 minutes;

[0084] S4: Refining, refining temperature 750-760℃, after refining, let it stand for 5 minutes to skim off the slag;

[0085] S5: furnace conduction, furnace conduction after the composition is qualified, furnace conduction temperature is 750-760℃;

[0086] S6: Standing, after the furnace is guided and then refined, standing, the refining gas is nitrogen, liquid refining is adopted, the electric heating temperature is set at 800-830℃, standing after refining, refining once every 2 hours, and no less than twice per furnace;

[0087] S7: Degassing, the degassing gas is nitrogen, the nitrogen pressure is ≥0.4Mpa, the nitrogen oxygen content is ≤30ppm, the degassing box slag is cleaned as needed, the frequency is not less than 1 time / hour, the amount of titanium wire added needs to be determined according to the plate speed and addition rate;

[0088] S8: Filtration, preheat the filter plate before use, and bake it with a torch until it turns red before insertion;

[0089] S9: Casting and rolling, water temperature ≤ 35°C, water pressure 0.2-0.4 MPa, casting and rolling speed 0.55-0.65 m / min;

[0090] S10: Quenching.

[0091] Example 2

[0092] In this embodiment, the ratio range is further optimized compared to Example 1, the test data of test groups 8 to 14 are added, the aluminum alloy raw materials are prepared according to the ratio of the mass percentage of each component of test groups 8 to 14, and the preparation is carried out according to the above-mentioned aluminum alloy preparation method.

[0093] The specific mass percentages of the aluminum alloy components of test groups 8 to 14 and the control group are shown in Table 5 below.

[0094] Table 5

[0095]

[0096] The aluminum alloy coils after preparation were sampled, and five sample points were selected from the aluminum alloy coils prepared in test groups 8 to 14 and the control group to test the tensile strength and elongation, as shown in Table 6 and Figure 3 The tensile strength test results of each test group are shown in Table 7 and Figure 4 Shown are the results of elongation tests.

[0097] Table 6

[0098]

[0099]

[0100] Table 7

[0101]

[0102] According to the test results of each test group in Table 6 and Table 7, and reference Figure 3 and Figure 4 The comparison charts of the respective test data given can show that:

[0103] The average tensile strength of test group 8 was 150.65 MPa, and the average elongation was 20.50%;

[0104] The average tensile strength of test group 9 was 156.29 MPa, and the average elongation was 18.53%;

[0105] The average tensile strength of test group 10 was 159.79 MPa, and the average elongation was 19.19%;

[0106] The average tensile strength of test group 11 was 155.44 MPa, and the average elongation was 17.66%.

[0107] The average tensile strength of test group 12 was 153.66 MPa, and the average elongation was 19.12%.

[0108] The average tensile strength of test group 13 was 170.84 MPa, and the average elongation was 18.47%.

[0109] The average tensile strength of test group 14 was 171.22 MPa, and the average elongation was 17.37%;

[0110] The average tensile strength of the control group was 123.93 MPa, and the average elongation was 37.29%.

[0111] Comprehensively comparing the above test results, the tensile strength of test groups 8 to 9 is significantly improved compared with the control group, and the elongation is reduced compared with the control group. However, the tensile strength and elongation of test groups 8 to 17 can meet the production requirements. Figure 1 and Figure 3 、 Figure 2 and Figure 4 It can be seen that the overall distribution line of tensile strength and the overall distribution line of elongation of Example 2 are relatively more concentrated than the overall distribution line of tensile strength and the overall distribution line of elongation of Example 1. Therefore, it can be seen that the performance change fluctuations of the aluminum alloy ratios of test groups 8 to test groups 14 in the above Example 2 are relatively small and relatively more stable.

[0112] In summary, the aluminum alloy of this embodiment (the mass percentage of each component is Si: 0.35wt.% to 0.45wt.%; Fe: 0.50wt.% to 0.60wt.%; Cu: 0.45wt.% to 0.70wt.%; Mn: 1.25wt.% to 1.35wt.%; Mg: ≤0.05wt.%, Zn ≤0.10wt.%; Ti: 0.02wt.% to 0.05wt.%; other single impurities: ≤0.05wt.%; other impurities total: ≤0.15wt.%; Al: balance) has a tensile strength greater than 150MPa and an elongation greater than 17%, which meets the production requirements of the enterprise standard for liquid cooling plates.

[0113] The present embodiment provides an aluminum alloy and a preparation method thereof. The aluminum alloy contains Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, and the mass percentages of each component are Si: 0.35wt.% to 0.45wt.%; Fe: 0.50wt.% to 0.60wt.%; Cu: 0.45wt.% to 0.70wt.%; Mn: 1.25wt.% to 1.35wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.% to 0.05wt.%; other single impurities: ≤0.05wt.%; other impurities in total: ≤0.15wt.%; Al: balance, and is prepared according to the above-mentioned aluminum alloy preparation method S1-S10.

[0114] This embodiment also provides a method for preparing an aluminum alloy, comprising the following steps:

[0115] S1: Prepare the raw materials required for the preparation according to the ratio of Example 2;

[0116] S2: Melting: Take part of the raw materials prepared in S1 and melt them at a temperature of 750-770°C, stirring for 5 minutes;

[0117] S3: Adjust the ingredients by adjusting the ratio of each element according to the ratio of each element in Example 2 (i.e., take the remaining part of the preparation and add it), heat for half an hour and stir for 5 minutes;

[0118] S4: Refining, refining temperature 750-760℃, after refining, let it stand for 5 minutes to skim off the slag;

[0119] S5: furnace conduction, furnace conduction after the composition is qualified, furnace conduction temperature is 750-760℃;

[0120] S6: Standing, after the furnace is guided and then refined, standing, the refining gas is nitrogen, liquid refining is adopted, the electric heating temperature is set at 800-830℃, standing after refining, refining once every 2 hours, and no less than twice per furnace;

[0121] S7: Degassing, the degassing gas is nitrogen, the nitrogen pressure is ≥0.4Mpa, the nitrogen oxygen content is ≤30ppm, the degassing box slag is cleaned as needed, the frequency is not less than 1 time / hour, the amount of titanium wire added needs to be determined according to the plate speed and addition rate;

[0122] S8: Filtration, preheat the filter plate before use, and bake it with a torch until it turns red before insertion;

[0123] S9: Casting and rolling, water temperature ≤ 35°C, water pressure 0.2-0.4 MPa, casting and rolling speed 0.55-0.65 m / min;

[0124] S10: Quenching.

[0125] Example 3

[0126] This embodiment provides an aluminum alloy, comprising Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, wherein the mass percentages of the components are Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.30 wt.%; Mg: ≤0.05 wt.%, Zn ≤0.10 wt.%; Ti: 0.02 wt.% to 0.05 wt.%; other individual impurities: ≤0.05 wt.%; other impurities in total: ≤0.15 wt.%; and Al: the remainder.

[0127] Through test group 10 of Example 2, it can be concluded that the aluminum alloy of this embodiment (the mass percentage of each component is Si: 0.30wt.%~0.50wt.%; Fe: 0.45wt.%~0.65wt.%; Cu: 0.40wt.%~0.80wt.%; Mn: 1.30wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other single impurities: ≤0.05wt.%; other impurities total: ≤0.15wt.%; Al: balance) has a tensile strength greater than 150MPa and an elongation greater than 17%, which meets the production requirements of the enterprise standard for liquid cooling plates.

[0128] This embodiment also provides a method for preparing an aluminum alloy, wherein raw materials are prepared according to the mass percentage of each component of the aluminum alloy in this embodiment, and the preparation steps are the same as those described in Example 1.

[0129] Example 4

[0130] This embodiment provides an aluminum alloy, comprising Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, wherein the mass percentages of the components are Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.55 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤ 0.05 wt.%, Zn ≤ 0.10 wt.%; Ti: 0.02 wt.% to 0.05 wt.%; other individual impurities: ≤ 0.05 wt.%; other impurities in total: ≤ 0.15 wt.%; and Al: the remainder.

[0131] Through test group 10 of Example 2, it can be concluded that the aluminum alloy of this embodiment (the mass percentage of each component is Si: 0.30wt.%~0.50wt.%; Fe: 0.55wt.%; Cu: 0.40wt.%~0.80wt.%; Mn: 1.25wt.%~1.35wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other single impurities: ≤0.05wt.%; other impurities total: ≤0.15wt.%; Al: balance) has a tensile strength greater than 150MPa and an elongation greater than 17%, which meets the production requirements of the enterprise standard for liquid cooling plates.

[0132] This embodiment also provides a method for preparing an aluminum alloy, wherein raw materials are prepared according to the mass percentage of each component of the aluminum alloy in this embodiment, and the preparation steps are the same as those described in Example 1.

[0133] Example 5

[0134] This embodiment provides an aluminum alloy, comprising Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, wherein the mass percentages of the components are Si: 0.40 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤0.05 wt.%, Zn ≤0.10 wt.%; Ti: 0.02 wt.% to 0.05 wt.%; other individual impurities: ≤0.05 wt.%; other impurities in total: ≤0.15 wt.%; and Al: the remainder.

[0135] Through test group 10 of Example 2, it can be concluded that the aluminum alloy of this embodiment (the mass percentage of each component is Si: 0.40wt.%; Fe: 0.45wt.%~0.65wt.%; Cu: 0.40wt.%~0.80wt.%; Mn: 1.25wt.%~1.35wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other single impurities: ≤0.05wt.%; other impurities total: ≤0.15wt.%; Al: balance) has a tensile strength greater than 150MPa and an elongation greater than 17%, which meets the production requirements of the enterprise standard for liquid cooling plates.

[0136] This embodiment also provides a method for preparing an aluminum alloy, wherein raw materials are prepared according to the mass percentage of each component of the aluminum alloy in this embodiment, and the preparation steps are the same as those described in Example 1.

[0137] Example 6

[0138] This embodiment provides an aluminum alloy, comprising Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, wherein the mass percentages of the components are Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.60 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤ 0.05 wt.%, Zn ≤ 0.10 wt.%; Ti: 0.02 wt.% to 0.05 wt.%; other individual impurities: ≤ 0.05 wt.%; other impurities in total: ≤ 0.15 wt.%; and Al: the remainder.

[0139] Through test group 10 of Example 2, it can be concluded that the aluminum alloy of this embodiment (the mass percentage of each component is Si: 0.30wt.%~0.50wt.%; Fe: 0.45wt.%~0.65wt.%; Cu: 0.60wt.%; Mn: 1.25wt.%~1.35wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other single impurities: ≤0.05wt.%; other impurities total: ≤0.15wt.%; Al: balance) has a tensile strength greater than 150MPa and an elongation greater than 17%, which meets the production requirements of the enterprise standard for liquid cooling plates.

[0140] This embodiment also provides a method for preparing an aluminum alloy, wherein raw materials are prepared according to the mass percentage of each component of the aluminum alloy in this embodiment, and the preparation steps are the same as those described in Example 1.

[0141] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. An aluminum alloy, characterized in that: Contains Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, with the mass percentage of each component being Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.% to 0.05wt.%; other individual impurities: ≤0.05wt.%; other impurities in total: ≤0.15wt.%; Al: balance; The α-Fe2SiAl8 phase is formed in the aluminum alloy, which has a second strengthening effect on the alloy; the Cu element can assist in the solid solution strengthening of the aluminum alloy structure, effectively improving the strength and hardness of the aluminum alloy.

2. An aluminum alloy according to claim 1 or 2, characterized in that: Contains Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, with the mass percentage of each component being Si: 0.35wt.% to 0.45wt.%; Fe: 0.50wt.% to 0.60wt.%; Cu: 0.45wt.% to 0.70wt.%; Mn: 1.25wt.% to 1.35wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other individual impurities: ≤0.05wt.%; other impurities in total: ≤0.15wt.%; Al: balance.

3. An aluminum alloy according to claim 1 or 2, characterized in that: Contains Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, with the mass percentage of each component being Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.30 wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other individual impurities: ≤0.05wt.%; other impurities in total: ≤0.15wt.%; Al: balance.

4. An aluminum alloy according to claim 1 or 2, characterized in that: Contains Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, with the mass percentage of each component being Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.55 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other individual impurities: ≤0.05wt.%; other impurities in total: ≤0.15wt.%; Al: balance.

5. An aluminum alloy according to claim 1 or 2, characterized in that: Contains Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, with the mass percentage of each component being Si: 0.40 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.40 wt.% to 0.80 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other individual impurities: ≤0.05wt.%; other impurities in total: ≤0.15wt.%; Al: balance.

6. An aluminum alloy according to claim 1 or 2, characterized in that: Contains Si, Fe, Cu, Mn, Mg, Zn, Ti, and Al elements, with the mass percentage of each component being Si: 0.30 wt.% to 0.50 wt.%; Fe: 0.45 wt.% to 0.65 wt.%; Cu: 0.60 wt.%; Mn: 1.25 wt.% to 1.35 wt.%; Mg: ≤0.05wt.%, Zn≤0.10wt.%; Ti: 0.02wt.%~0.05wt.%; other individual impurities: ≤0.05wt.%; other impurities in total: ≤0.15wt.%; Al: balance.

7. A method for preparing an aluminum alloy, comprising the following steps: S1: preparing the required raw materials according to the ratio according to any one of claims 1 to 6; S2: smelting, the smelting temperature is 750~770℃; S3: Composition adjustment, adjusting the composition ratio of each element according to the mass percentage of the alloy described in any one of claims 1 to 6; S4: refining, refining temperature 750-760℃; S5: furnace conduction, furnace conduction after the composition is qualified, furnace conduction temperature is 750-760℃; S6: Let it stand, conduct the furnace and then refine it, then let it stand, set the electric heating temperature at 800-830℃, refine it every 2 hours, and not less than twice per furnace; S7: Degassing, the degassing gas is nitrogen, the nitrogen pressure is ≥0.4Mpa, and the nitrogen oxygen content is ≤30ppm; S8: Filter; S9: Casting and rolling, water temperature ≤ 35°C, water pressure 0.2-0.4 MPa, casting and rolling speed 0.55-0.65 m / min; S10: Quenching.

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