本发明提供了一种460MPa级高强抗震耐火耐候钢热轧卷板及其生产方法，所述耐火耐候钢，包括以下重量百分比的化学成分：碳0 .045％～0 .055％ ，硅：0 .2％～0.3％ ，锰：1.6％～1.8％，磷≤0 .02％，硫≤0 .005％，铜：0.35％～0.40％，铬：0.6％～0.8％，镍：0.3％～0.4％，铌：0.04％～0.05％，钛：0.01％～0 .02％，钼：0.2％～0.3％，其余为铁以及不可避免的杂质。本发明耐火耐候钢热轧卷板通过添加Cu、Cr、Ni元素满足耐腐蚀性能要求，添加Nb、Mo元素匹配合理的控轧空冷工艺，以铁素体+贝氏体为目标金相组织，满足抗震性能及高温性能要求。另外，本发明通过微合金成分优化设计匹配合理控制轧制和控制冷却工艺获得室温、高温力学性能优异及耐腐蚀性能良好的高品质耐火耐候钢。

The invention provides a 460MPa grade high strength earthquake-resistant weathering steel hot-rolled coil plate and a production method thereof. The refractory weathering steel comprises the following chemical composition by weight percentage: carbon 0.045% ~ 0.055%, Silicon 0.2% ~ 0.3%, manganese: 1.6% ~ 1.8%, Phosphorus ≤ 0.02%, sulfur ≤ 0.005%, Copper: 0.35% ~ 0.40%, Chromium: 0.6% ~ 0.8%, Nickel: 0.3% ~ 0.4%, Niobium: 0.04% ~ 0.05%, Titanium: 0.01% ~ 0.02%, Molybdenum: 0.2% to 0.3%, the rest is iron and inevitable impurities. The hot rolled coil plate of refractory weathering steel meets the requirements of corrosion resistance by adding Cu, Cr and Ni elements, adding Nb and Mo elements to match the reasonable controlled rolling air cooling process, taking ferrite + bainite as the target metallographic structure, and meeting the requirements of seismic performance and high temperature performance. In addition, the invention obtains high-quality refractory weathering steel with excellent mechanical properties at room temperature and high temperature and good corrosion resistance by optimizing the composition of microalloy, matching reasonable control of rolling and controlling cooling process.