采用Gleeble1500热力模拟试验机对马氏体双相钢的形变奥氏体连续冷却转变曲线(CCT曲线)进行了测定,利用光学显微镜对组织进行了观察,利用电子背散射对微观取向进行了统计分析。结果表明,当冷速大于5℃/s时,有马氏体生成,随着冷却速度的增加,马氏体的含量增多,同时出现少量的贝氏体组织;当冷速为30℃/s时,其组织细小,岛状马氏体分布均匀,{111}纤维织构的体积分数异常增加。 The deformed austenite transformation curve (CCT curve) of martensitic dual phase steel was measured by Gleeble1500 thermal simulation test machine. The microstructure was observed by optical microscope, and the microscopic orientation was analyzed by electron backscatter . The results show that when the cooling rate is more than 5 ℃ / s, martensite is formed. With the increase of cooling rate, the content of martensite increases and a small amount of bainite appears. When the cooling rate is 30 ℃ / s , Its organization is fine, island martensite distribution, {111} fibrous texture abnormal increase in volume fraction.