The invention relates to a method for prolonging the fatigue life of a frame longitudinal beam, a longitudinal beam structure and a heat treatment device. The method for prolonging the fatigue life of the frame longitudinal beam comprises the following steps: determining a dangerous part of the formed frame longitudinal beam according to load distribution of the frame longitudinal beam; and carrying out heat treatment on the dangerous part to eliminate residual stress in the forming process of the frame longitudinal beam; wherein the process parameters of the heat treatment are as follows: the heating temperature is more than 500 DEG C. Residual stress in the dangerous part forming process can be accurately eliminated, the toughness of the material is improved, the stress concentration degree of the dangerous part is reduced, and therefore the high crack and stress concentration sensitivity of a high-strength steel plate are effectively reduced, and the technical problem that the high-strength steel plate is prone to cracking is solved.

    本申请涉及一种提高车架纵梁疲劳寿命的方法、纵梁结构和热处理装置。一种提高车架纵梁疲劳寿命的方法,包括:根据车架纵梁载荷分布,确定成形后的车架纵梁的危险部位;对所述危险部位进行热处理,消除所述车架纵梁成形过程中的残余应力;其中,所述热处理的工艺参数为:加热温度为500℃以上。可精准消除危险部位成型过程中的残留应力,提高材料的韧性,降低了危险部位应力集中程度,从而有效降低高强度钢板高裂纹和应力集中敏感性,解决了高强度钢板易发生开裂的技术难题。


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    Title :

    Method for prolonging fatigue life of frame longitudinal beam, longitudinal beam structure and heat treatment device


    Additional title:

    提高车架纵梁疲劳寿命的方法、纵梁结构和热处理装置


    Contributors:
    XU CHENGLIN (author) / XIE WENCAI (author) / XIE LIANQING (author) / ZHOU LIBIN (author) / QIAO XIAOBING (author) / WANG XUESHUANG (author) / XU JIABIN (author) / JIANG BO (author) / YUAN BAIQIANG (author) / LI JIANDONG (author) ... [more]

    Publication date :

    2022-01-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / B62D MOTOR VEHICLES , Motorfahrzeuge



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