The invention relates to low-temperature-resistant non-quenched and tempered steel and a preparation method and application thereof. The low-temperature-resistant non-quenched and tempered steel comprises C, Si, Mn, Cr, V, Ni, Nb, S, N, Al and other elements, and the balance Fe and inevitable impurities. According to the low-temperature-resistant non-quenched and tempered steel, the Nb, V and Ni elements are added in the smelting process, so that (Nb, V) (C1-CxN1-y) is generated by microalloying elements including Nb and V and elements including C and N, wherein x is more than 0 and less than 1, y is more than 0 and less than 1, and a composite strengthening effect is formed. In combination with temperature control in the controlled rolling and controlled cooling process, the purpose of refining grains is achieved, and the impact energy of the finally obtained medium-carbon pearlite-ferrite type non-quenched and tempered steel at the temperature of 50 DEG C below zero reaches 35 J or above. Therefore, the obtained low-temperature-resistant non-quenched and tempered steel is particularly suitable for preparing thrust wheels of machinery running in a low-temperature environment.

    本发明涉及一种耐低温非调质钢及其制备方法与应用,所述耐低温非调质钢包括C、Si、Mn、Cr、V、Ni、Nb、S、N、Al等元素,余量为Fe以及不可避免的杂质。本发明通过在冶炼过程中加入Nb、V以及Ni元素,使微合金化元素Nb、V与C、N生成(Nb,V)(C1‑xN1‑y),其中0


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    Title :

    Low-temperature-resistant non-quenched and tempered steel and preparation method and application thereof


    Additional title:

    一种耐低温非调质钢及其制备方法与应用


    Contributors:
    LIU ZENGPING (author) / YIN XIUGANG (author) / HAN CHANGHAI (author) / ZHANG JUN (author) / WANG ZHILI (author) / SHI JINQING (author)

    Publication date :

    2021-09-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C22C Legierungen , ALLOYS / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / B21B Walzen von Metall , ROLLING OF METAL / B62D MOTOR VEHICLES , Motorfahrzeuge



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