The invention relates to a preparation method of a 6-series aluminum alloy for an automobile anti-collision beam, and belongs to the technical field of aluminum alloys. The invention discloses a preparation method of a 6-series aluminum alloy for an automobile anti-collision beam. The preparation method comprises the following steps: S1, preparing alloy raw materials according to the following mass percent: 0.65-0.85% of Si, 0.1-0.25% of Fe, 0.2-0.25% of Cu, 0.2-0.4% of Mn, 0.8-1.0% of Mg, 0.15-0.2% of Cr, less than or equal to 2.6% of total alloy content, less than or equal to 0.05% of single impurity element, less than or equal to 0.15% of total impurity element and the balance of Al; s2, melting and casting the raw materials into an aluminum alloy casting rod; s3, the cast rod is heated to 510-530 DEG C and extruded, and the temperature of an extrusion outlet is controlled to be 530-540 DEG C; s4, after extrusion is completed, the steel plate is placed within 0-168 h for pre-aging, the temperature of the pre-aging process ranges from 125 DEG C to 150 DEG C, and the time ranges from 0.5 h to 5 h; and S5, after placing for 0-720 hours, secondary aging is carried out, the temperature of the secondary aging is 195-230 DEG C, and the time is 1-10 hours. Good mechanical performance and three-point bending performance are obtained by regulating and controlling alloy raw materials and combining pre-aging and secondary aging.

    本发明涉及一种用于汽车防撞梁用6系铝合金的制备方法,属于铝合金技术领域。本发明公开了一种用于汽车防撞梁用6系铝合金的制备方法,所述制备方法包括:S1、按照以下质量百分比配制合金原料:Si 0.65~0.85%,Fe 0.1~0.25%,Cu 0.2~0.25%,Mn 0.2~0.4%,Mg 0.8~1.0%,Cr 0.15~0.2%,合金总含量≤2.6%,杂质元素单个≤0.05%,合计≤0.15%,余量为Al;S2、将上述原料经熔融铸造成铝合金铸棒;S3、将铸棒加热至510~530℃,进行挤压,挤压出口温度控制在530~540℃;S4、挤压完成后放置0~168h内进行预时效,预时效过程温度为125~150℃,时间为0.5~5h;S5、放置0~720h后进行二次时效,二次时效的温度为195~230℃,时间为1~10h。本发明通过调控合金原料结合预时效、二次时效,获得较好的机械性能和三点弯性能。


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    Title :

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


    Additional title:

    一种用于汽车防撞梁用6系铝合金的制备方法


    Contributors:
    KONG CHANGCHANG (author) / RAN QINGRONG (author) / SUN YULING (author) / LIU CANWEI (author)

    Publication date :

    2023-12-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    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 / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / C22F CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS , Verändern der physikalischen Struktur von Nichteisenmetallen oder Nichteisenlegierungen



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