The invention relates to the technical field of aluminum alloy processing and preparation, in particular to a 6-series high-strength aluminum alloy forging performance part and a preparation method and application thereof. By accurately controlling the content of elements such as Mg, Si, Cu, Fe, Mn, Cr, La, Ce, Sn and Zn, the recrystallization temperature of the material is remarkably increased, and grain growth caused by temperature and deformation in the hot forging process of a traditional forging part is effectively avoided. Meanwhile, a two-stage solid solution process is adopted, first-stage solid solution treatment is conducted at low temperature, solid solution of a certain amount of Mg, Si and Cu elements is guaranteed, and meanwhile the possibility of grain growth is reduced under the low-temperature condition; and then secondary solution treatment is carried out, solid solution of the remaining Mg and Si elements is promoted at a high temperature within a short time, due to the fact that the time is short, surface grains are prevented from growing to form a coarse grain layer, the cost of subsequent additional CNC machining is reduced, and the fatigue performance and the service life of parts can be remarkably improved through grain refinement without the coarse grain layer.

    本发明涉及铝合金加工制备技术领域,尤其涉及一种6系高强度铝合金锻造性能件及其制备方法和应用。本发明通过精确控制Mg、Si、Cu、Fe、Mn、Cr、La、Ce、Sn、Zn等元素的含量,显著提高了材料的再结晶温度,有效避免了传统锻造件在热锻过程中因温度和变形量导致的晶粒长大。同时,通过采用双级固溶工艺,首先在低温下进行一级固溶处理,确保一定量的Mg、Si、Cu元素固溶,同时低温条件减少了晶粒长大的可能性;随后通过二级固溶处理,在短时间内以较高温度促进剩余Mg、Si元素的固溶,由于时间较短,避免了表面晶粒长大形成粗晶层,从而减少了后续需要额外CNC加工的成本,并且无粗晶层的晶粒细化可以显著提高零部件的疲劳性能和使用寿命。


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    Title :

    6-series high-strength aluminum alloy forging performance part and preparation method and application thereof


    Additional title:

    一种6系高强度铝合金锻造性能件及其制备方法和应用


    Contributors:
    ZHOU JINGZHE (author) / LIU CAIXING (author) / LI HONGGANG (author) / LIANG HAOHUI (author) / FU YI (author) / XIANG YAO (author)

    Publication date :

    2024-11-22


    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 / B62D MOTOR VEHICLES , Motorfahrzeuge / 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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