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发明公开
CN107686941A 一种焊接性能优良的风电塔筒用钢板及其生产方法 无效 - 驳回

一种焊接性能优良的风电塔筒用钢板及其生产方法
摘要：
本发明公开了一种焊接性能优良的风电塔筒用钢板及其生产方法，所述钢板的化学成分组成及质量百分含量为：C：0.05～0.10%，Si：0.25～0.45%，Mn：1.20～1.70%，P≤0.018%，S≤0.005%，Nb：0.025～0.045%，V：0.025～0.045%，Al：0.020～0.050%，其余为Fe和其它不可避免的杂质；生产方法包括炼钢、连铸、轧制工序。本发明通过合理的化学成分设计，采用炼钢、连铸及控轧工艺，使钢板的综合性能良好，屈服强度≥345MPa，抗拉强度470-630MPa，-40℃纵向冲击功≥27J，满足用户对风电塔筒用钢板优良焊接性能的要求，应用前景广阔。
摘要（英）：

The invention discloses a steel plate with the good welding property and for a wind power tower tube and a production method of the steel plate. The steel plate contains the chemical components including, by mass, 0.05-0.10% of C, 0.25-0.45% of Si, 1.20-1.70% of Mn, 0-0.018% of P, 0-0.005% of S, 0.025-0.045% of Nb, 0.025-0.045% of V, 0.020-0.050% of Al and the balance Fe and other unavoidable impurities. The production method includes the procedures of steel making, continuous casting and rolling. Through reasonable design of the chemical components and by means of the process of steel making,continuous casting and rolling control, the comprehensive property of the steel plate is good, the yield strength is larger than or equal to 345 MPa, the tensile strength is 470-630 MPa, -40 DEG C longitudinal impact work is larger than or equal to 27 J, the demand of users for the good welding property of the steel plate used for the wind power tower tube is met, and the application prospects are wide.

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