摘要

通过设计成分(/%:0.09C,0.15Si,1.15Mn,0.58Ni,0.47Cr,0.44Mo,0.033V,0.022Nb,0.0012B,0.036Al,0.014Ti),控制熔炼分析N含量≤20×10-6冶炼,钢锭最高加热温度≤1 200℃轧制、930℃淬火、610℃回火,开发出的60 mm厚SX780CF钢板屈服强度780 MPa,抗拉强度887 MPa,延伸率18%,5%应变250℃时效后-20℃冲击功(KV2) 203~210 J,满足水电站用800 MPa级低焊接裂纹敏感性高强钢技术要求。