The invention provides a variable yield strength aluminum alloy and a preparation method and application thereof, and relates to the technical field of vehicle body materials, the variable yield strength aluminum alloy comprises 0.45-0.7% of Si, 0.05-0.15% of Mn, 0.45-0.65% of Mg, less than or equal to 0.1% of Fe, less than or equal to 0.1% of Cu, less than or equal to 0.04% of Cr, less than or equal to 0.1% of Zn, less than or equal to 0.1% of Ti, less than or equal to 0.15% of impurity elements, and the balance Al. The solution treatment in the preparation of the variable yield strength aluminum alloy is as follows: the temperature of the end solution treatment is 535-550 DEG C, and the time is 10-13 minutes; the temperature Tc of the middle solution treatment is 481-500 DEG C, the time tz of the middle solution treatment is 10-13 minutes, and a relational expression # imgabs0 # is met. The variable yield strength aluminum alloy provided by the invention has the effect of variable yield strength, the use performance of the aluminum alloy is remarkably improved, and the refined control of the pedestrian protection effect is realized.

    本发明提供一种变屈服强度铝合金及其制备方法和用途,涉及车身材料技术领域,包括:Si 0.45‑0.7%,Mn 0.05‑0.15%,Mg 0.45‑0.65,Fe≤0.1%,Cu≤0.1%,Cr≤0.04%,Zn≤0.1%,Ti≤0.1%,杂质元素合计≤0.15%,余量为Al。制备所述变屈服强度铝合金中固溶处理为:端部固溶处理的温度为535‑550℃,时间为10‑13min;中部固溶处理的温度Tc为481‑500℃,时间tz为10‑13min,满足关系式#imgabs0#。本发明提供的变屈服强度铝合金具有变屈服强度的效果,显著提升了铝合金的使用性能,实现行人保护效果精细化控制。


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    Title :

    Variable yield strength aluminum alloy and preparation method and application thereof


    Additional title:

    一种变屈服强度铝合金及其制备方法和用途


    Contributors:
    WANG PENG (author) / LYU YING (author) / XIA GUANGMING (author) / SHANG SHUXIAN (author) / FENG HAN (author) / SONG QIFENG (author) / ZHUANG HUAYE (author)

    Publication date :

    2023-12-26


    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



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