刘晓明,李辉,吴冰冰,张笛,周书豪

• 1:山东理工大学材料科学与工程学院
• 2:烟台南山学院科研处

摘要(Abstract)：

采用场发射扫描电镜(SEM)、电子背散射衍射(EBSD)和X射线衍射仪(XRD)等研究了不同淬火制度、配分制度对高强塑积Q&P钢显微组织演变的影响；利用万能拉伸试验机测试了其力学性能；基于数学模型预测了最优工艺下不同强化机制对屈服强度的贡献；表征了变形过程中残留奥氏体的相变诱导塑性(TRIP)效应。结果表明：淬火温度为200℃时，试验Q&P钢的马氏体组织较细小，残留奥氏体含量较多；经200℃淬火+300℃×3 min配分处理后，变形过程中能充分地发挥TRIP效应，获得最佳的综合力学性能，强塑积达到22.67 GPa·%;变形过程中，80%的残留奥氏体在15%应变前发生了TRIP效应，有助于均匀塑性变形；仅有约10%的残留奥氏体在15%～20%的应变区间发生TRIP效应，产生颈缩直至断裂；残留奥氏体的稳定性和数量共同决定了TRIP效应的强弱。

关键词(KeyWords)： Q&P钢;残留奥氏体;力学性能;数学模型;TRIP效应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52274384)

作者(Author): 刘晓明,李辉,吴冰冰,张笛,周书豪

DOI: 10.13289/j.issn.1009-6264.2024-0053

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