The invention provides 1800MPa-grade hot forming steel as well as a hot stamping forming method and application thereof, and belongs to the technical field of hot forming steel. The 1800MPa-grade hot forming steel provided by the invention comprises the following chemical components: 0.28 to 0.32 percent of C, 0.2 to 0.3 percent of Si, 1.5 to 1.7 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.01 percent of S, 0.002 to 0.0035 percent of B, 0.15 to 0.25 percent of Cr, 0.02 to 0.05 percent of Al, less than or equal to 0.03 percent of Ti, less than or equal to 0.005 percent of N, 0.04 to 0.055 percent of Nb, 0.15 to 0.25 percent of V and the balance of Fe and impurities. The tensile strength and the ductility of a 1800MPa-grade hot forming steel member are guaranteed through the combined action of C, Si, Mn, P, S, B, Cr, Al, Ti, N, Nb and V with specific contents and tempering through waste heat after quenching.

    本发明提供了一种1800MPa级热成形钢及其热冲压成形方法和应用,属于热成形钢技术领域。本发明提供的1800MPa级热成形钢,化学成分:C0.28~0.32%,Si 0.2~0.3%,Mn 1.5~1.7%,P≤0.015%,S≤0.01%,B0.002~0.0035%,Cr 0.15~0.25%,Al 0.02~0.05%,Ti≤0.03%,N≤0.005%,Nb0.04~0.055%,V 0.15~0.25%,余量为Fe和不杂质。特定含量的C、Si、Mn、P、S、B、Cr、Al、Ti、N、Nb和V的共同作用和淬火后利用余热的回火保证了1800MPa级热成形钢构件的抗拉强度和延伸率。


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    Title :

    1800MPa-grade hot forming steel as well as hot stamping forming method and application thereof


    Additional title:

    一种1800MPa级热成形钢及其热冲压成形方法和应用


    Contributors:
    WEI XICHENG (author) / SONG NINGHONG (author) / NI LEI (author) / GUO YAZHOU (author) / LIN CHAO (author) / SUN HAO (author) / WANG WURONG (author)

    Publication date :

    2021-09-03


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



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