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OALib Journal期刊
ISSN: 2333-9721
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含Cu低碳钢Q&P工艺处理的组织性能与强化机理
DOI: 10.3724/SP.J.1037.2013.00176, PP. 917-924
Keywords: Q&P处理,残余奥氏体,富Cu粒子,强塑积
Abstract:
在带钢连续退火实验机上,对一种含Cu低碳实验钢进行了Q&P处理,并使用扫描电镜、电子背散射衍射、X射线衍射、透射电镜及室温拉伸实验等手段对其显微组织和力学性能进行了表征.结果表明,富Cu粒子可以在Q&P处理过程中析出,呈圆球形,直径多为9-20nm,弥散分布于马氏体板条内部.根据Orowan机制,该析出相对强度的贡献量约为134MPa.同时观察到,钢中残余奥氏体的形貌分布各异,主要有薄膜状、小颗粒状和大块状.实验钢的综合力学性能良好,强塑积可达21.2GPa·%,抗拉强度达到1326MPa,延伸率16.0%,其优异的综合力学性能主要得益于残余奥氏体的形变诱发相变,即TRIP效应.
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