在实验室采用热轧控冷工艺制备了Nb微合金化热轧TRIP钢,并对其进行了力学性能检测,通过光学显微镜、激光共聚焦显微镜、扫描电镜、EBSD及X射线衍射对该钢的组织进行了观察.结果表明:试验钢力学性能为:屈服强度为535 ～ 552 MPa,抗拉强度740～745 MPa,屈强比ReL/Rm为0.71 ～0.74,伸长率A80为28.5％ ～31.0％;试验钢组织为典型的铁素体、贝氏体、残留奥氏体三相组织,残留奥氏体体积分数为12.3％,EBSD观察表明残留奥氏体尺寸大多数在1μm以下.
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