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发明公开
CN106661705A 渗碳合金钢及其制备方法和应用 有权

渗碳合金钢及其制备方法和应用
摘要：
本发明涉及一种渗碳合金钢及其制备方法和应用，该合金钢的该合金钢的组分及其质量百分比为C：0.15％～0.25％，Si：≤0.30％，Mn：0.30％～1.20％，Cr：0.30％～1.50％，Ni：2.80％～3.80％，Mo：0.30％～1.00％，Al：0.01％～0.08％，以及V和Nb中的至少一种，余量为铁和不可避免的杂质；且当所述合金钢包含V时，V的质量百分比为0.05％～0.15％，当上述合金钢包含Nb时，Nb的质量百分比为0.025％～0.10％，并且所述V、Nb和Al的质量百分比含量符合V+Nb+Al≤0.30％。本发明的渗碳合金钢抗疲劳性能好、综合力学性能优异，具有高淬透性、高屈强比、极小的内氧化和抗高温晶粒长大特性，适用于制造重载齿轮。
摘要（英）：

A carburized alloy steel and a method for preparing same. The elements of the alloy are present in the following mass percentages: C: 0.15%-0.25%, Si: <=0.30%, Mn: 0.30%-1.20%, P: <= 0.015%, S: <= 0.010%, Cr: 0.30%-1.50%, Ni: 2.80%-3.80%, Mo: 0.30%-1.00%, Al: 0.01%-0.08%, and at least one of V: 0.05%-0.15% and Nb: 0.025%-0.10%, the remainder being Fe and unavoidable impurities; and the mass percentage content of V, Nb and Al satisfies V+Nb+Al<=0.30%. The carburized alloy steel is obtained by means of smelting, blank casting, normalizing/tempering treatment, and quenching/tempering treatment. The quenching treatment involves increasing the temperature of a blank to 800 DEG C-860 DEG C, maintaining the temperature for 0.8h-1.5h, then placing into a rapid quench oil to cool to the temperature of the rapid quench oil.

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