Manufacturing method of low-cost high-P weathering resistant steel

The invention discloses a manufacturing method of low-cost high-P weathering resistant steel, and belongs to the field of steel production, the manufacturing method comprises the steps of smelting, continuous casting, rough rolling, induction heating, finish rolling, laminar cooling and coiling, molten steel comprises the following chemical components in percentage by mass: 0.01-0.06% of C, 0.05-0.18% of Si, 0.10-0.28% of Mn, 0.10-0.15% of P, less than or equal to 0.005% of S, 0.25-0.35% of Cu, 0.30-0.50% of Cr, 0.03-0.06% of Ti and the balance of iron and inevitable impurities; and [% P] + [% Ti] > = 0.15. Compared with the prior art, under the condition of low Si and low Mn, good strength can still be kept, and excellent machining forming performance is obtained. 本发明公开了一种低成本高P耐候钢的制造方法，属于钢铁生产领域，包括冶炼→连铸→粗轧→感应加热→精轧→层流冷却→卷取，钢水化学成分质量百分比为：C：0.01～0.06％、Si:0.05～0.18％、Mn：0.10～0.28％、P：0.10～0.15％、S：≤0.005％、Cu：0.25～0.35％、Cr：0.30～0.50％、Ti：0.03～0.06％，余量为铁及不可避免的杂质；且[％P]+[％Ti]≥0.15。与现有技术相比较，在低Si、低Mn情况下，仍能保持良好的强度，获得了优良的加工成型