The invention discloses a 6-series aluminum alloy for an automobile energy absorption box and a preparation method, which relate to the technical field of wrought aluminum alloy smelting extrusion forming. According to the method, Mn and Cr elements are compositely added into the aluminum alloy, the specific ratio of Mg to Si is designed, specific technological parameters are combined, dynamic recrystallization and grain coarsening in the extrusion process are inhibited, a fibrous deformation structure in the extrusion direction is obtained, and therefore collapse deformation, cracking and failure are improved on the basis that the material strength is guaranteed, and the high requirement of the automobile energy absorption box on the comprehensive performance of the aluminum alloy profile is met. A semi-continuous casting process is strictly controlled, so that an aluminum alloy ingot obtains a grain structure with the size of 100-250 microns, the size of an AlFeSi compound is below 30 microns, and finally, the tensile strength of the two-cavity aluminum alloy profile produced by the technology is 280-310 MPa, the yield strength is 240-270 MPa, and the percentage elongation after fracture A50 is 10-14%; and the crack length at the corner after collapsing deformation can be controlled within 10mm.

    本发明公开了一种汽车吸能盒用6系铝合金及制备方法,涉及变形铝合金熔炼挤压成型技术领域。该方法通过在铝合金中复合添Mn、Cr元素和设计特定的Mg:Si比例,结合特定的工艺参数,抑制挤压过程中动态再结晶和晶粒粗化,获得沿挤压方向上呈现纤维状变形组织,从而在保证材料强度的基础上改善溃缩变形开裂失效,满足汽车吸能盒对铝合金型材的综合性能高要求。严格控制半连续铸造工艺,使铝合金铸锭获得尺寸为100~250微米的晶粒组织,AlFeSi化合物尺寸在30微米以下,最终本发明技术生产的两腔铝合金型材的抗拉强度为280~310MPa,屈服强度为240~270MPa,断后伸长率A50为10~14%;溃缩变形后拐角处裂纹长度可控制在10mm以内。


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    6-series aluminum alloy for automobile energy absorption box and preparation method


    Weitere Titelangaben:

    一种汽车吸能盒用6系铝合金及制备方法


    Beteiligte:
    ZHANG QI (Autor:in)

    Erscheinungsdatum :

    11.02.2022


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    C22C Legierungen , ALLOYS / B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING , Herstellen von Blechen, Metalldraht, -stangen, -rohren Metallprofilen oder Halbzeugen auf andere Weise als durch Walzen / B22D CASTING OF METALS , Gießen von Metallen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / C22F CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS , Verändern der physikalischen Struktur von Nichteisenmetallen oder Nichteisenlegierungen





    Preparation method of 6-series aluminum alloy for automobile anti-collision beam

    KONG CHANGCHANG / RAN QINGRONG / SUN YULING et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Lightweight collision energy absorption aluminum alloy auxiliary frame of new energy automobile

    YANG QING / ZHU XIANMING / QIN YONGMEI et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Lightweight collision energy absorption aluminum alloy auxiliary frame of new energy automobile

    WANG DAOCHENG / LI CHANGSHUN / WANG GUIMIN et al. | Europäisches Patentamt | 2022

    Freier Zugriff