利用盐浴热处理、扫描电镜、X衍射、拉伸试验等实验手段,辅以相图计算及显微组织预测技术,对一种含I.5%Al的冷轧相变诱导塑性(TRIP)钢在370℃到450℃贝氏体区等温后得到的组织与性能进行了研究,探讨贝氏体区等温工艺对相变行为、显微组织及力学性能的影响.结果表明:藉热处理工艺优化等措施,采用Al完全替代Si设计生产高性能冷轧TRIP钢是可行的.贝氏体区等温相变过程中Al元素有效抑制奥氏体中碳化物的析出,获得了数量多稳定性强的残余奥氏体;其中400℃等温180s的工艺使试验钢强度为756MPa时其伸长率达34.2%,但试验钢在450℃等温180s后将产生一定数量的对强塑积不利的马氏体.
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