方超,吴秋云,潘红波,丁敬,于良,方强

• 1:马鞍山钢铁股份有限公司
• 2:安徽工业大学冶金减排与资源综合利用教育部重点实验室
• 3:马鞍山钢铁股份有限公司特钢公司

摘要(Abstract)：

为了研究Nb元素及I&Q&P工艺对双相钢组织演变及力学性能的影响，设计了1号无Nb和2号Nb含量为0.05%的两种试验钢作为研究对象，并使用CCT-AY-II连退模拟器对其进行I&Q&P工艺处理。采用光学显微镜、扫描电镜、X射线衍射和拉伸试验机等研究了两种试验钢在不同温度退火后的显微组织和力学性能。结果表明：试验钢的强度随退火温度升高而上升，伸长率则相反，1号与2号试验钢强塑积均在840℃退火时达到最大值，分别为12.3 GPa·%与14.3 GPa·%;与1号无Nb试验钢相比，2号加Nb试验钢组织相对细小，塑性略高，强度明显高于1号无Nb试验钢，这与Nb的细晶强化和析出强化有关。

关键词(KeyWords)： I&Q&P工艺;Nb微合金化;退火温度;组织演变;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1860105,51774006);; 安徽省重大专项(18030901085);; 中信-CBMM铌钢研究与开发项目

作者(Author): 方超,吴秋云,潘红波,丁敬,于良,方强

DOI: 10.13289/j.issn.1009-6264.2022-0414

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