【摘要】 采用膨胀法结合金相分析建立了耐候钢变形和未变形奥氏体的连续冷却转变曲线(CCT曲线)。试验钢变形奥氏体的CCT曲线具有较宽的铁素体析出区,即有较宽的“速度窗口”;铁素体区与贝氏体区之间有60~80℃的奥氏体稳定区,可作为“卷取窗口”;贝氏体转变区的右侧端部封口等。所有这些特征为热轧生产双相钢提供了基本条件。更多还原

【Abstract】 The continuous cooling transformation(CCT) diagrams of deformed and undeformed austenite of weathering steel were constructed by means of a combined method of dilatometry and metallography.In the CCT diagram of deformed austenite,the transformation zone of ferrite is very wide,which provides a wide "velocity window".Between the transformation zone of ferrite and bainite,there is a 60-80 ℃ metastable austenite zone,which provides a "coiling window".Additionally,the transformation zone of bainite is sealed up at the right side.All these special features of the deformed austenite CCT diagram provide a basic condition for production of hot-rolled dual phase steel.更多还原