对一种钒微合金TRIP钢进行了热轧试验,并研究其微观组织特征及力学性能.结果表明,将终轧温度控制在Ae3附近,热轧后的钒微合金TRIP钢具有由铁素体,粒状贝氏体和一定量残余奥氏体组成的复相组织.EBSD分析结果表明,其中75%以上的铁素体晶粒尺寸在l-6 μm;绝大多数晶界取向差角度位于29°-60°.当终轧温度为830℃.终冷温度为650℃时,实验钢的综合力学性能较为优异,抗拉强度为1015 MPa,延伸率为19.5%,加工硬化指数为0.24.
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