High-strength wheel steel and production method thereof

The invention relates to high-strength wheel steel and a production method thereof. The high-strength wheel steel is prepared from, by weight, 0.05-0.12% of C, 0.01-0.25% of Si, 1.50-2.00% of Mn, 0-0.015% of P, 0-0.006% of S, 0.03-0.09% of Nb, 0.015-0.080% of Ti, 0-0.30% of Mo, 0-0.30% of Cu, 0-0.30% of Ni, 0-0.30% of Cr, and the balance Fe and inevitable impurities. The production method mainly comprises the following steps of smelting, refining, slab continuous casting, slab heating, rough rolling, precision rolling, cooling, reeling and acid pickling. By controlling specific process parameters in all the working procedures, the purpose of grain refinement and precipitation hardening is achieved, and thus a steel plate with high strength, high plasticity, and excellent welding performance and forming performance is obtained. 本发明涉及一种高强车轮钢及其生产方法，由以下重量百分比计的组分组成，C：0.05～0.12％，Si：0.01～0.25％，Mn：1.50～2.00％，P≤0.015％，S≤0.006％，Nb：0.03～0.09％，Ti：0.015～0.080％，Mo≤0.30％，Cu≤0.30％，Ni≤0.30％，Cr≤0.30％，其余为Fe和不可避免的杂质，主要包括以下步骤：冶炼工