采用三段式和两段式冷却工艺成功试制了低成本热轧双相钢,分析了低Mo试验钢的微观组织和力学性能。结果表明,通过工艺参数控制能够实现低Mo双相钢中温卷取热轧,其屈服强度达到315 MPa,抗拉强度达到620 MPa,伸长率达到26%,屈强比约0.5;加入合金元素V起到细化晶粒和改善组织作用,很好弥补了Mo减少带来的不利影响。 The low-cost hot-rolled dual-phase steel was successfully manufactured by the three-stage and two-stage cooling processes and the microstructure and mechanical properties of the low Mo test steel were analyzed. The results show that the low temperature hot-rolled dual-phase low-Mo steel can be achieved by the process parameters control. The yield strength reaches 315 MPa, the tensile strength reaches 620 MPa, the elongation reaches 26% and the yield ratio is about 0.5. V serves to refine the grains and improve the organization, well compensating for the adverse effects of Mo reduction.