以一种屈服强度为600 MPa的热轧高强钢为研究对象,进行了超快冷工艺与层流冷却工艺的对比试验,对试验钢进行了力学性能、SEM、TEM及EDS分析.结果表明:与层流冷却工艺相比,超快冷工艺有效提高了钢的性能,屈服强度和抗拉强度分别提高了90和60 MPa,其屈服强度、抗拉强度和断后伸长率分别为670、740 MPa及19％,-20℃冲击功为105J,具有良好的强度及韧性.经过超快冷后,试验钢的组织为细化的铁素体,其强化相为细小的铁素体及细小析出物.
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