Method for improving yield strength of Q460-grade high-strength steel plate

The invention discloses a method for improving the yield strength of a Q460-grade high-strength steel plate, and relates to the technical field of steel production. Chemical components comprise Nb, Vand Ti microalloy elements, Ceq is less than 0.48, and the method is suitable for the steel plate with the rolled yield strength of less than 470MPa. The steel plate with the low rolled yield strengthcan be saved, so that the unplanned loss of the performance of a steel mill is reduced. The adopted method is simple in production process, wide in adjustable range of process parameters and easy toimplement in the steel mill. 本发明公开了一种提高Q460级高强度钢板屈服强度的方法，涉及钢铁生产技术领域，化学成分中包括Nb、V、Ti微合金元素，Ceq＜0.48，适用于轧态屈服强度＜470MPa的钢板。可以对轧态屈服强度偏低的钢板进行挽救，降低了钢厂性能非计划的损失。所采用的方法生产工艺简单，工艺参数可调范围较宽，在钢厂易于实现。