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发明公开
CN110157982A 一种耐海水腐蚀钢板及其生产方法 有权

一种耐海水腐蚀钢板及其生产方法
摘要：
本发明公开了一种耐海水腐蚀钢板及其生产方法，其化学成分按质量百分比计为：C 0.08%～0.12%、Si 0.25%～0.35%、Mn 1.0%～1.6%、P≤0.012%、S≤0.008%、Cr+Ni+Cu≤1.2%、Sn 0.025%～0.050%、Nb+V+Ti≤0.05%，其余为Fe及不可避免的杂质。本钢板采用低碳+Nb、Ti等微合金化处理，添加耐腐蚀元素，配合轧制参数的调控，具有高强度、耐海水腐蚀性及优良焊接性。本方法通过成分与轧制工艺的限定，调控出合金的组织，达到良好的强韧性匹配，免去的热处理工序；本发明工艺流程短，钢板以TMCP态交货免去轧后热处理，成本低；所得钢板具有高强度、耐海水腐蚀性及优良焊接性等，产品具有高附加值；所得钢板的屈服强度≥530MPa、抗拉强度660～710MPa、伸长率≥18%、海水全浸条件年腐蚀厚度≤2mm。
摘要（英）：

The invention discloses a seawater corrosion resisting steel plate and a production method thereof. The seawater corrosion resisting steel plate comprises the following chemical components in percentage by mass: 0.08-0.12% of C, 0.25-0.35% of Si, 1.0-1.6% of Mn, P not more than 0.012%, S not more than 0.008%, Cr+Ni+Cu not more than 1.2%, 0.025-0.050% of Sn, Nb+V+Ti not more than 0.05%, and the balance of Fe and inevitable impurities. The steel plate is treated by adopting low carbon, Nb and Ti in a microalloying mode; corrosion resisting elements are fed; and through cooperation with adjustment of rolling parameters, the effects of high strength, seawater corrosion resistance and excellent weldability are achieved. Through limiting of the components and the rolling process, the alloy structures are adjusted to achieve excellent strength and toughness matchability; the heat treatment procedure is saved; the process flow is short, and the steel plate is delivered in a TMCP state to saveafter-rolling heat treatment, so that the cost is low; the steel plate achieves high strength, seawater corrosion resistance, excellent weldability and high additional value; and the yield strength ofthe steel plate is not less than 530 MPa, the tensile strength is 660-710 MPa, the elongation is not less than 18%, and the seawater total immersion condition annular corrosion thickness is not morethan 2 mm.

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