Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C21/00—Alloys based on aluminium
  • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
  • B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
  • B22D21/04—Casting aluminium or magnesium
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C1/00—Making non-ferrous alloys
  • C22C1/02—Making non-ferrous alloys by melting
  • C22C1/026—Alloys based on aluminium
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C1/00—Making non-ferrous alloys
  • C22C1/02—Making non-ferrous alloys by melting
  • C22C1/03—Making non-ferrous alloys by melting using master alloys
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C21/00—Alloys based on aluminium
  • C22C21/10—Alloys based on aluminium with zinc as the next major constituent

Definitions

• the present disclosure relates to the technical field of materials, and in particular to aluminum alloys and preparation methods thereof, and aluminum alloy structural parts.
• Die casting is one of the basic forming methods of aluminum alloy, which can be used for product design of complex structural parts.
• the most commonly used die-casting aluminum alloy is the Ai-Si-Cu die-casting alloy ADC12 specified by the Japanese Industrial Standard JISH5302. It has good material flow forming properties, large forming process window, and high cost performance. It has been widely used in aluminum alloy die-casting products.
• ADC12 has the advantages of low density and high specificity, and can be used for die-casting shells, small size and thin type or brackets. However, the strength and thermal conductivity of its die-cast products are general.
• the present disclosure aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, one purpose of the present disclosure is to propose an aluminum alloy with both mechanical properties, thermal conductivity and die casting properties.
• the present disclosure provides an aluminum alloy.
• the aluminum alloy based on the total mass of the aluminum alloy, in terms of mass percentage, includes: 9-12% Si; 8-11% Zn; 0.5-1.5% Mg; 0.2- 0.8% Cu; 0-0.6% Fe; 0.08-0.25% Mn; 0-0.10% Sr; 0-0.05% Sc; 0-0.5% Er; and 73.2-82.22% Al.
• the aluminum alloy has good strength, thermal conductivity and die-casting performance at the same time, which can meet the requirements for the use of structural parts with high thermal conductivity and strength requirements, and is suitable for the manufacture of 3C product structural parts, automobile radiators, turbine disks, lighting equipment, etc. .
• the present disclosure provides a method of preparing the aforementioned aluminum alloy.
• the method includes heating aluminum, silicon-containing raw materials, copper-containing raw materials, iron-containing raw materials, manganese-containing raw materials, strontium-containing raw materials, scandium-containing raw materials, erbium-containing raw materials, zinc-containing raw materials, and magnesium-containing raw materials Melting to obtain an aluminum alloy liquid; and sequentially performing stirring, refining and casting treatments on the aluminum alloy liquid to obtain the aluminum alloy.
• the method is simple and convenient to operate, easy to industrialize, and the obtained aluminum alloy has high thermal conductivity and good mechanical properties and die-casting properties.
• the present disclosure provides an aluminum alloy structural member.
• at least a part of the aluminum alloy structural member is made of the aforementioned aluminum alloy.
• the aluminum alloy structural member has all the features and advantages of the aluminum alloy described above, and will not be repeated here.
• the present disclosure provides an aluminum alloy.
• the aluminum alloy includes: 9-12% Si; 8-11% Zn; 0.5-1.5% Mg; 0.2- 0.8% Cu; 0-0.6% Fe; 0.08-0.25% Mn; 0-0.10% Sr; 0-0.05% Sc; 0-0.5% Er; and 73.2-82.22% Al.
• the specific content of Si element in the aluminum alloy can be 9%, 10.5%, 11.5%, 12%, etc., as the main mechanical strengthening element, Si element can be dissolved in Al to form ⁇ -Al solid solution and Al-Si
• the crystalline or hypoeutectic phase improves the mechanical properties of the aluminum alloy while ensuring the fluidity of die-casting and taking into account the yield problem of mass production.
• the addition of Si will reduce the thermal conductivity of aluminum alloy, so its content must be controlled.
• Si within the above content range can make the aluminum alloy have better mechanical properties, thermal conductivity and die-casting properties at the same time. If the Si content is too small, aluminum The mechanical properties and die casting properties of the alloy are poor. If the Si content is too much, the thermal conductivity of the aluminum alloy is low.
• the specific content of Zn in the aluminum alloy may be 8%, 9.5%, 10.5%, 11%, etc.
• Zn in the solid solution state can be slowly precipitated to form natural aging strengthening.
• the solid solution state of Zn has little effect on the thermal conductivity of Al, and Zn within the above-mentioned content range can achieve a strengthening effect while ensuring a better thermal conductivity. If the Zn content is too low, the mechanical properties of the aluminum alloy are poor, and if the Zn content is too high, the thermal conductivity of the aluminum alloy is affected, and the thermal conductivity of the aluminum alloy is low.
• the specific content of Mg in the aluminum alloy may be 0.05%, 0.08%, 0.12%, 0.15%, etc.
• Mg and Si can form a strengthening phase of Mg 2 Si, and can form strengthening phases such as MgZn 2 and AlMg 3 Zn 2 with Zn and Al, which have a significant strengthening effect.
• a small amount of addition can significantly increase the strength of aluminum alloy.
• the Mg content is too high, the toughness and plasticity of the aluminum alloy will decrease, and the thermal conductivity of the aluminum alloy will be greatly reduced.
• the specific content of Cu in the aluminum alloy may be 0.2%, 0.5%, 0.7%, 0.8%, etc.
• Cu can be incorporated into the Al-Zn-Mg phase and the aluminum matrix to form a super hard phase.
• too much Al-Zn-Mg-Cu phase will cause the fracture toughness and elongation of aluminum alloy to decrease.
• Cu can effectively strengthen the aluminum alloy without excessively affecting the fracture toughness and elongation of the aluminum alloy, so that the aluminum alloy has good strength, fracture toughness and elongation.
• the aluminum alloy may or may not contain Fe, and the specific content of Fe in the aluminum alloy may be 0%, 0.2%, 0.4%, 0.6%, etc.
• Fe element can prevent die sticking during die casting of aluminum alloy, but excessive Fe will lead to the formation of needle-like or flake-like Al-Si-Fe phase in the aluminum alloy, splitting the grains, reducing the toughness of the aluminum alloy and causing the product to fracture.
• Fe within the above content range can not only ensure that the aluminum alloy has good mold-free performance, but also will not affect the mechanical properties of the aluminum alloy.
• the specific content of Mn in the aluminum alloy may be 0.08%, 0.15%, 0.25%, etc.
• Mn can play the role of supplementary strengthening, which is better than the same amount of Mg.
• Mn can form (Fe, Mn)Al 6 phase with Al and Fe, so that the alloy has better strong plasticity, but Mn will be significantly reduced
• the thermal conductivity of aluminum alloy should be limited to its addition. It has been verified by experiments that within the above content range, Mn can play the role of supplementary strengthening and make the aluminum alloy have ideal mechanical properties without affecting the thermal conductivity of the aluminum alloy, making the aluminum alloy both ideal Mechanical properties and thermal conductivity.
• the ratio of Fe to Mn may be (2.5-3.5):1 (for example, 2.5:1, 3.0:1, 3.5:1, etc.).
• Mn can better transform the acicular iron phase into a bone shape, eliminate the splitting effect on the aluminum alloy, and have better coordination and synergy between the various elements, so that the aluminum alloy has better performance.
• the aluminum alloy of the present disclosure may or may not contain Sr.
• the specific content of Sr in the aluminum alloy may be 0%, 0.01%, 0.05%, 0.1%, etc.
• Sr can be added to the aluminum alloy as a modifier to refine the ⁇ -Al solid solution and the needle-like Si phase, improve the structure of the aluminum alloy, purify the grain boundary, reduce the resistance of the electronic movement in the alloy, and further enhance the thermal conductivity of the aluminum alloy Performance and mechanical properties, but excessive Sr will form a brittle phase and reduce the mechanical properties of aluminum alloy.
• Sr in the above content range can better improve the thermal conductivity and mechanical properties of the aluminum alloy.
• the aluminum alloy of the present disclosure may contain or not contain Sc or/and Er, that is, the aluminum alloy may contain neither Sc nor Er, only Sc but not Er, not containing Sc but only Er, or both. Sc and Er.
• the inventors of the present disclosure found that the addition of Sc and Er rare earth elements can effectively improve the mechanical properties of the aluminum alloy of the present disclosure.
• the addition of rare earth elements is conducive to purifying the aluminum alloy liquid, refining the grains, improving the structure, thereby improving the comprehensive performance of the aluminum alloy.
• the content of rare earth element Sc in the aluminum alloy is less than 0.05% (such as 0%, 0.03%, 0.05%, etc.) in terms of weight percentage.
• the price of Er is about 1/(20-25) of Sc, and it can be added in large quantities to replace Sc to greatly reduce the cost of aluminum alloy.
• the weight percentage is In total, the content of the rare earth element Er in the aluminum alloy is less than 0.5%, (such as 0%, 0.2%, 0.5%, etc.), specifically, within the range of 0.15-0.35%.
• the specific content of aluminum in the aluminum alloy of the present disclosure may be 73.2%, 76%, 79%, 82%, 82.22%, etc.
• the die-cast aluminum alloy provided by the present disclosure can not only improve the strength of the aluminum alloy, but also ensure that the material has higher thermal conductivity and die-casting performance, and can meet the requirements for the use of structural parts with high thermal conductivity and strength requirements, and is suitable for 3C product structural parts , Automobile radiator, turbine disc, lighting equipment, etc.
• the aluminum alloy includes: 10-11% Si; 9.5-10.5% Zn; 0.7-1% Mg; 0.35- 0.65% Cu; 0.35-0.5% Fe; 0.12-0.18% Mn; 0.02-0.05% Sr; 0.015-0.025% Sc; 0.15-0.35% Er; and 75.745-78.795% Al. Within this range, the thermal conductivity, mechanical properties and die casting properties of aluminum alloy are relatively better.
• the aluminum alloy satisfies at least one of the following conditions: the content of a single impurity element is less than 0.01%; the total content of the impurity element Less than 0.1%.
• aluminum alloys since the purity of raw materials is difficult to reach 100%, and impurities are likely to be introduced during the preparation process, aluminum alloys usually contain inevitable impurities (such as Ca, P, Zr, Cr, Pb, Be, Ti, Ni, etc.).
• the content of a single element of impurity elements in the aluminum alloy may specifically be 0.01%, 0.009%, 0.008t%, 0.007%, 0.006%, 0.005%, 0.004%, 0.003%, 0.002%, 0.001 %, etc.
• the total content of impurity elements may specifically be 0.1%, 0.09%, 0.08%, 0.07%, 0.06%, 0.05%, 0.04%, 0.03%, 0.02%, 0.01%, etc.
• the content of each element of Ti, Zr and Ni is less than 0.01%, and the sum of the content of the three elements of Ti, Zr and Ni Less than 0.1%.
• the various properties of the aluminum alloy can be well guaranteed to meet the requirements, and the aluminum alloy will not be negatively affected.
• the aluminum alloy based on the total mass of the aluminum alloy, in terms of mass percentage, is composed of the following components: 9-12% Si; 8-11% Zn; 0.5-1.5% Mg; 0.2-0.8% Cu; 0-0.6% Fe; 0.08-0.25% Mn; 0-0.10% Sr; 0-0.05% Sc; 0-0.5% Er; and the balance Al.
• the aluminum alloy with the above-mentioned components and proportions has both good thermal conductivity, mechanical properties and die-casting performance, can meet the requirements of high strength and high thermal conductivity, and is suitable for preparing 3C product structural parts, automobile radiators, turbine disks, Lighting equipment, etc.
• the aluminum alloy is composed of the following components: 10-11% Si; 9.5-10.5% Zn; 0.7-1% Mg; 0.35-0.65% Cu; 0.35-0.5% Fe; 0.12-0.18% Mn; 0.02-0.05% Sr; 0.015-0.025% Sc; 0.15-0.35% Er; and the balance Al.
• the aluminum alloy with the above-mentioned components and proportions has relatively better thermal conductivity, mechanical properties and die-casting properties, and is more suitable for preparing 3C product structural parts, automobile radiators, turbine disks, lighting equipment, etc.
• the aluminum alloy satisfies at least one of the following conditions: the yield strength is greater than or equal to 245 MPa, specifically 245 to 270 MPa (such as 250 MPa, 260 MPa, 270 MPa, etc.), and the tensile strength is greater than or equal to 390 MPa, Specifically, it can be 390 ⁇ 420MPa (such as 390MPa, 400MPa, 410MPa, 420MPa, etc.), and the elongation is greater than or equal to 3%, and specifically can be 3-4% (such as 3%, 3.1%, 3.2%, 3.3%, 3.4%).
• the thermal conductivity is greater than or equal to 125W/mK, specifically 125 to 140W/mK (such as 125W/mK, 130W/mK, 140W/mK, etc.).
• the aluminum alloy satisfies any one of the foregoing conditions, any two conditions, any three conditions, or all four conditions. In some specific embodiments, the aluminum alloy may satisfy all the foregoing four conditions. As a result, the aluminum alloy has good strength, thermal conductivity and die-casting performance at the same time, which can meet the development needs of high strength and high thermal conductivity, and is used in the manufacture of 3C product structural parts, automobile radiators, turbine disks, and lighting equipment.
• the present disclosure provides a method of preparing the aforementioned aluminum alloy.
• the method includes heating aluminum, silicon-containing raw materials, copper-containing raw materials, iron-containing raw materials, manganese-containing raw materials, strontium-containing raw materials, scandium-containing raw materials, erbium-containing raw materials, zinc-containing raw materials, and magnesium-containing raw materials Melting to obtain an aluminum alloy liquid; and sequentially performing stirring, refining and casting treatments on the aluminum alloy liquid to obtain the aluminum alloy.
• the method is simple and convenient to operate, easy to industrialize, and the obtained aluminum alloy has high thermal conductivity and good mechanical properties and die-casting properties.
• the above method may specifically include: heating and melting aluminum and the silicon-containing raw material, and adding the copper-containing raw material, the iron-containing raw material, the manganese-containing raw material, the strontium-containing raw material, The scandium-containing raw material and the erbium-containing raw material are heated and melted to obtain a first aluminum alloy liquid; the zinc-containing raw material is added to the first aluminum alloy liquid and heated to melt, and then slag removal is performed to obtain a second aluminum alloy liquid.
• aluminum can be provided in the form of aluminum ingots
• silicon-containing raw materials copper-containing raw materials, iron-containing raw materials, manganese-containing raw materials, Strontium-containing raw materials, scandium-containing raw materials, erbium-containing raw materials, zinc-containing raw materials, and magnesium-containing raw materials can be provided in the form of elemental or intermediate alloys.
• the method may include heating and melting aluminum ingots and aluminum-silicon intermediate alloys, and adding aluminum-copper, aluminum-iron, aluminum-manganese, aluminum-strontium, aluminum-scandium, and aluminum-erbium intermediate alloys and then heating and melting them, Obtain a first aluminum alloy liquid; add a zinc ingot to the first aluminum alloy liquid and heat to melt, and then perform a slag removal treatment to obtain a second aluminum alloy liquid; in a protective atmosphere, add a zinc ingot to the second aluminum alloy liquid The magnesium ingot is added and heated and melted to obtain a third aluminum alloy liquid; the third aluminum alloy liquid is stirred, refined and casted in sequence to obtain the aluminum alloy.
• the method is simple and convenient to operate, easy to industrialize, and the obtained aluminum alloy has high thermal conductivity and good mechanical properties and die-casting properties.
• the above method may include the following steps: using pure aluminum ingots, Al-Si master alloys, pure Zn ingots, pure Mg ingots, Al-Cu master alloys, Al-Fe master alloys, Al-Mn master alloys, Al-Sr intermediates Alloy, Al-Sc master alloy, Al-Er master alloy as raw materials, weigh the raw materials according to the ratio, and then put the pure aluminum ingot and Al-Si master alloy into the crucible to smelt the alloy, and put it in Al-Cu after it is completely melted Master alloy, Al-Fe master alloy, Al-Mn master alloy, Al-Sr master alloy, Al-Sc master alloy, Al-Er master alloy, continue to heat until the master alloy is completely melted, add pure Zn ingot until it is completely melted , Control the temperature of the aluminum alloy liquid at 730-750°C (such as 730°C, 735°C, 740°C, 745°C, 750°C, etc.), stir for 5-8 minutes (
• the molten aluminum After the molten aluminum is completely melted, stir the molten aluminum evenly, detect and adjust the content of each element until it reaches the required range, and perform refining treatment 3-5min.
• the temperature of the alloy liquid is cooled to about 700°C, it is poured into an alloy mold to form an alloy ingot, and then the required aluminum alloy structural product is obtained by conventional die casting.
• the present disclosure provides an aluminum alloy structural member.
• at least a part of the aluminum alloy structural member is made of the aforementioned aluminum alloy.
• the aluminum alloy structural part has both good strength and ideal thermal conductivity, and can be formed by a simple die-casting process. The use effect is good and the preparation cost is low. Even when it has a thinner thickness, it still has a better use effect. .
• the aluminum alloy structure includes at least one of 3C product structure, automobile radiator structure, turbine disk structure, and lighting equipment structure. Specifically, it can be a mobile phone middle frame, a mobile phone back cover, a mobile phone middle board and other structural parts.
• the structural member has good mechanical strength, plasticity and thermal conductivity, which can well meet the user's requirements for high strength and high thermal conductivity of the product, and improve user experience.
• the standard master alloys and metal elements are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided below, and the aluminum alloy die-cast body A1 of the present disclosure is obtained by die casting.
• the weight content of the main elements is as Table 1.
• the aluminum alloy liquid evenly, detect and adjust the content of each element until it reaches the required range, and perform refining treatment for 3-5 minutes.
• the temperature of the alloy liquid is cooled to about 700°C, it is poured into an alloy mold to form an alloy ingot, and then the desired casting product is obtained by conventional die casting.
• each standard master alloy and metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A2 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• each standard master alloy and metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A3 of the present disclosure is obtained by die casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A4 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and metal elements are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A5 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A6 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and metal elements are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A7 of the present disclosure is obtained by die casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A8 of the present disclosure is obtained by die-casting.
• the weight content of the main elements is As shown in Table 1.
• each standard master alloy and metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A9 of the present disclosure is obtained by die-casting.
• the weight content of its main elements As shown in Table 1.
• each standard master alloy and metal element are weighed by weight, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body A9-A33 of the present disclosure is obtained by die casting.
• the weight content is shown in Table 1.
• the standard master alloys and metal elements are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B1 of the present disclosure is obtained by die-casting.
• the weight content of the main elements is As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B2 of the present disclosure is obtained by die-casting.
• the weight content of the main elements is As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B3 of the present disclosure is obtained by die-casting.
• the weight content of the main elements is As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B4 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B5 of the present disclosure is obtained by die-casting.
• the weight content of the main elements is As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die casting body B6 of the present disclosure is obtained by die casting.
• the weight content of the main elements As shown in Table 1.
• each standard master alloy and metal element are weighed by weight, and then an ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B7 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and metal elements are weighed by weight, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B8 of the present disclosure is obtained by die-casting.
• the weight content of its main elements As shown in Table 1.
• the standard master alloys and metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B9 of the present disclosure is obtained by die-casting.
• the weight content of its main elements As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B10 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and metal elements are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B11 of the present disclosure is obtained by die-casting.
• the weight content of its main elements As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B12 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and metal elements are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B13 of the present disclosure is obtained by die-casting.
• the weight content of the main elements is As shown in Table 1.
• the standard master alloys and the metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B14 of the present disclosure is obtained by die casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and elemental metals are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B15 of the present disclosure is obtained by die casting.
• the weight content of the main elements is As shown in Table 1.
• each standard master alloy and metal element are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B16 of the present disclosure is obtained by die-casting.
• the weight content of the main elements is As shown in Table 1.
• each standard master alloy and metal element are weighed, and then an ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B17 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the standard master alloys and metal elements are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B18 of the present disclosure is obtained by die casting.
• the weight content of the main elements is As shown in Table 1.
• the standard master alloys and metal elements are weighed, and then the ingot is obtained according to the aluminum alloy smelting preparation method provided in Example 1, and the aluminum alloy die-cast body B19 of the present disclosure is obtained by die-casting.
• the weight content of the main elements As shown in Table 1.
• the content of each component in the aluminum alloy obtained in the above examples 1-33 was tested by laser direct reading spectroscopy.
• the total content of impurities in all aluminum alloys was below 0.1%, and the content of individual impurity elements was below 0.01% .
• the mechanical properties (yield strength and tensile strength), elongation and thermal conductivity of the aluminum alloy of the present disclosure are relatively high.
• the aluminum in Examples 16-17, 20, 23-24, 27 and 30 The above-mentioned properties of the alloy are better.
• Comparative Examples 4 and 6 it can be seen that if the silicon content is too low, the mechanical properties and elongation will be poor.
• the mechanical properties (yield strength and tensile strength), elongation and thermal conductivity of the aluminum alloy cannot be balanced, or the above properties are not good. Either one or two of the above properties are good, and the other properties are not good, and the mechanical properties (yield strength and tensile strength), elongation and thermal conductivity cannot be well balanced.
• the aluminum alloy of the present disclosure is coordinated and synergistic by adjusting the components and proportions, so that the aluminum alloy has better mechanical properties, elongation and thermal conductivity, and can meet high requirements.
• the use requirements of strength, high thermal conductivity and toughness (elongation) are suitable for preparing 3C product structural parts, automobile radiator structural parts, turbine disk structural parts, lighting equipment structural parts, etc.

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