The invention relates to low-alloy cast steel, a smelting method thereof, a heat treatment method thereof and railway locomotive parts, and belongs to the technical field of alloy steel. The low-alloy cast steel disclosed by the invention comprises the following components in percentage by weight relative to the total weight of the low-alloy cast steel: 0.23%-0.28% of carbon, 0.20%-0.40% of silicon, 0.80%-1.00% of manganese, less than or equal to 0.020% of phosphorus, less than or equal to 0.020% of sulfur, 0.45%-0.55% of chromium, 0.50%-0.60% of nickel, 0.15%-0.25% of molybdenum, 0.02%-0.06% of aluminum, 0.02%-0.10% of tungsten and 0.01%-0.05% of niobium, and the sum of tungsten and niobium is greater than or equal to 0.04% and less than or equal to 0.12%, and the balance of iron and other inevitable elements. The low-alloy cast steel contains tungsten and niobium which are used according to a certain proportion, can be used as E-grade steel after being subjected to heat treatment, and has excellent weldability, good plasticity and impact toughness and good mechanical property stability.

    本发明涉及低合金铸钢及其冶炼方法、热处理方法和铁路机车零部件,属于合金钢技术领域。本发明公开的低合金铸钢的各组分及其相对于所述低合金铸钢总重的重量百分比为:碳0.23%~0.28%、硅0.20%~0.40%、锰0.80%~1.00%、磷≤0.020%、硫≤0.020%、铬0.45%~0.55%、镍0.50%~0.60%、钼0.15%~0.25%、铝0.02%~0.06%,以及钨0.02%~0.10%、铌0.01%~0.05%,且必须满足0.04%≤钨+铌≤0.12%;以及余量为铁和其他不可避免的元素。本发明的低合金铸钢含有按一定配比使用的钨和铌,在经过热处理后,可以作为E级钢使用,并且,具有优越的可焊性、良好的塑性和冲击韧性,且机械性能稳定性好。


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    Titel :

    Low-alloy cast steel, smelting method thereof, heat treatment method thereof and railway locomotive parts


    Weitere Titelangaben:

    低合金铸钢及其冶炼方法、热处理方法和铁路机车零部件


    Beteiligte:
    WEN CHAO (Autor:in) / ZHANG JUNXIN (Autor:in)

    Erscheinungsdatum :

    2021-07-30


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    C22C Legierungen , ALLOYS / B61G Kupplungen besonders ausgebildet für Eisenbahnfahrzeuge , COUPLINGS SPECIALLY ADAPTED FOR RAILWAY VEHICLES / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS



    Alloy steel reduces weight of locomotive parts

    Finch, R.J. | Engineering Index Backfile | 1922



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    Society of Automotive Engineers | TIBKAT | 2013