The invention relates to a high-strength and high-toughness aluminum alloy material as well as a preparation method and application thereof. The alloy is particularly suitable for production of new energy automobile parts such as an auxiliary frame and a battery tray. In order to solve the problems that an existing AlSi7Mg alloy is serious in deformation, low in yield strength qualification rate and the like during high-temperature heat treatment, a proper amount of Cu and Mg are introduced on the basis of the AlSi7 alloy, alloy components are optimized, and the content of harmful elements is strictly controlled. By reducing the solid solution temperature to about 490 DEG C and combining proper solid solution time and an artificial aging process, the alloy disclosed by the invention can obviously reduce the heat treatment deformation of a casting while ensuring the tensile strength and the yield strength. Test results show that after the alloy is adopted, the yield ratio of a casting is higher than 0.73, and the ductility and the tensile strength both meet the design requirements of automobile parts. In addition, according to the alloy, the energy consumption is reduced, the shaping workload after heat treatment is reduced, the production efficiency and economic benefits are remarkably improved, and the alloy has wide industrial application prospects.

    本发明涉及高强韧铝合金材料及其制备方法和应用,所述合金特别适用于新能源汽车部件如副车架和电池托盘的生产。为解决现有AlSi7Mg合金在高温热处理时变形严重、屈服强度合格率低等问题,本发明通过在AlSi7合金基础上引入适量Cu和Mg,优化合金成分,并严格控制有害元素含量。通过降低固溶温度至约490℃,结合适当的固溶时间和人工时效工艺,本发明的合金能够在保证抗拉强度和屈服强度的同时,显著减少铸件热处理变形。试验结果表明,采用该合金后,铸件的屈强比高于0.73,延展性和抗拉强度均符合汽车部件的设计要求。此外,本发明合金降低了能耗,并减少了热处理后的整形工作量,显著提高了生产效率和经济效益,具备广泛的工业应用前景。


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    Title :

    High-toughness aluminum alloy material as well as preparation method and application thereof


    Additional title:

    一种高强韧铝合金材料及其制备方法和应用


    Contributors:

    Publication date :

    2025-02-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C22C Legierungen , ALLOYS / B62D MOTOR VEHICLES , Motorfahrzeuge / C22F CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS , Verändern der physikalischen Struktur von Nichteisenmetallen oder Nichteisenlegierungen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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