The invention discloses a niobium-containing bainite non-quenched and tempered steel material, a steering knuckle and a preparation method, relates to the technical field of non-quenched and tempered steel materials, and further improves the obdurability of automobile steering knuckles. The material comprises the following components in percentage by weight: 0.32 to 0.36 percent of C, 0.15 to 0.35 percent of Si, 1.8 to 2.0 percent of Mn, 0 to 0.015 percent of P, 0.035 to 0.065 percent of S, 0.15 to 0.30 percent of Cr, 0.15 to 0.20 percent of V, 0.01 to 0.03 percent of Ti and 0.02 to 0.04 percent of Nb. The preparation process comprises the following steps: S1, electric furnace smelting; s2, LF refining; s3, VD vacuum treatment is carried out; s4, ingot casting; s5, heat treatment; s6, rolling is conducted; s7, air cooling; s8, finishing is conducted; and S9, flaw detection. The preparation method of the steering knuckle comprises the following steps: T1, blanking; t2, induction heating; t3, primary forging; t4, intermediate forging is conducted; t5, finish forging; t6, trimming is conducted; and T7, fan forced cooling.

    一种含铌贝氏体非调质钢材料、转向节以及制备方法,涉及非调质钢材料技术领域,进一步提升了汽车转向节的强韧性。所述材料包含按重量百分比计的以下组分:C:0.32~0.36、Si:0.15~0.35、Mn:1.8~2.0、P:0~0.015、S:0.035~0.065、Cr:0.15~0.30V:0.15~0.20、Ti:0.01~0.03、Nb:0.02~0.04。制备工艺包括:S1、电炉冶炼;S2、LF精炼;S3、VD真空处理;S4、铸锭;S5、热处理;S6、轧制;S7、空冷;S8、精整;S9、探伤。转向节制备方法包括:T1、下料;T2、感应加热;T3、初锻;T4、中锻;T5、终锻;T6、切边;T7、风扇强制冷却。


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    Title :

    Niobium-containing bainite non-quenched and tempered steel material, steering knuckle and preparation method


    Additional title:

    一种含铌贝氏体非调质钢材料、转向节以及制备方法


    Contributors:
    ZHANG YIHE (author) / ZHANG WEI (author) / CHANG LIANXIA (author) / HU YUE (author) / ZHANG GUOZHENG (author)

    Publication date :

    2023-04-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C22C Legierungen , ALLOYS / B21J FORGING , Schmieden / B62D MOTOR VEHICLES , Motorfahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS



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