为同时满足屈强比≤0.83和600℃Rp0.2≥307MPa的技术条件，设计目标金相组织为铁素体+贝氏体，控制冷却工艺为水冷—空冷—水冷三段冷却模式，采用超快冷使带钢迅速进入两相区，设定UFCT温度及空冷时间以控制铁素体体积分数，通过后段层冷控制带钢卷取温度处于贝氏体区，确保获得大量的贝氏体组织。460MPa级抗震耐蚀耐火钢10mm薄板轧态的-40℃低温冲击性能为210J，197J，176J。

In order to meet the technical conditions of compressive strength ratio ≤0.83 and Rp0.2≥307MPa at 600℃ at the same time, the design target microstructure is ferrite + bainite, and the control cooling process is water cooling - air cooling - water cooling three-stage cooling mode. Ultra-fast cooling is used to make the strip enter the two-phase zone quickly, and the UFCT temperature and air cooling time are set to control the ferrite volume fraction. The coiling temperature of strip is controlled in bainite zone by cooling in the back layer to ensure that a large amount of bainite structure is obtained. 460MPa seismic corrosion resistant refractory steel 10mm sheet rolled at -40℃ low temperature impact energy 210J, 197J, 176J.