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发明公开
CN105908081A 低合金铸钢及其冶炼方法、热处理方法和铁路机车零部件 有权 许可

低合金铸钢及其冶炼方法、热处理方法和铁路机车零部件
摘要：
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0.19%～0.25%、硅0.30%～0.50%、锰0.90%～1.15%、磷≤0.030%、硫≤0.030%、铬0.19%～0.29%、钼0.13%～0.19%、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按一定配比使用钨和铌来替代镍，在经过热处理后，可以作为B+级钢使用，并且，成本低。
摘要（英）：

The invention relates to low-alloy cast steel, a smelting method and a heat treatment method thereof and a locomotive part, and belongs to the technical field of alloy steel. The low-alloy cast steel comprises the following components in percentage by weight corresponding to total weight of the low-alloy cast steel: 0.19-0.25% of carbon, 0.30-0.50% of silicon, 0.90-1.15% of manganese, not more than 0.030% of phosphorous, not more than 0.030% of sulfur, 0.19-0.29% of chromium, 0.13-0.19% of molybdenum, 0.02-0.06% of aluminum, 0.02-0.10% of tungsten, 0.01-0.05% of niobium and the balance of iron and other inevitable elements, wherein the total content of tungsten and niobium is not more than 0.12% and not less than 0.04%. The low-alloy cast steel uses tungsten and niobium for replacing nickel according to a certain ratio, can serve as Grade B+ steel after heat treatment, and is low in cost.

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