本发明提供一种B-Nb-N微合金化高强度耐候钢厚板及制备方法,属于金属材料技术领域。该耐候钢厚板化学成分重量百分比为：C0.02-0.08％,Si 0.10-0.25％,Mn 1.30-1.60％,P<0.030％,S<0.020％,Cr 0.30％-0.35％,Cu 0.45-0.70％,Ni 0.30-0.50％,Mo 0.10-0.30％,Nb 0.04-0.06％,B 0.002-0.004％,并且N/Nb：1/10-1/8,其余为Fe。按该成分配比,将铸坯轧制成厚钢板,再通过热处理,最终得到耐候钢厚板。该耐候钢厚板具有显微组织和力学性能均匀一致、高耐蚀性的优点,可广泛应用于建筑和桥梁工程。

The present invention provides a B-Nb-N micro-alloyed high-strength weathering steel plate and preparation method, which belongs to the technical field of metal materials. The chemical composition of the weathering steel plate is: C 0.02-0.08%, Si 0.10-0.25%, Mn 1.30-1.60%, P<0.030%, S<0.020%, Cr 0.30%-0.35%, Cu 0.45-0.70%, Ni 0.30-0.50%, Mo 0.10-0.30%, Nb According to this ratio, the cast billets are rolled into thick steel plates and then heat treated to obtain weathering steel plates. The weathering steel thick plate has the advantages of uniform microstructure and mechanical properties, high corrosion resistance, and can be widely used in construction and bridge projects.