孟庆勇,王福明,李长荣,崔冠军,唐郑磊

• 1:北京科技大学钢铁冶金新技术国家重点实验室
• 2:北京科技大学冶金与生态工程学院
• 3:北京科技大学材料科学与工程学院
• 4:南阳汉冶特钢有限公司钢研所

摘要(Abstract)：

采用静态CCT(Continuous Cooling Transformation)曲线结合温度场有限元数值计算的方法,对12Cr2Mo1R特厚板正火加速冷却后贝氏体组织形成进行控制。由静态CCT曲线和显微组织确定形成贝氏体组织最小冷却速率(临界冷却速度),冷却速度大于临界冷却速率时,获得贝氏体组织。由于特厚板心部是获得贝氏体最为困难的部位,因此对心部贝氏体组织形成进行详细的研究。通过有限元数值计算研究特厚板表面冷却强度对心部冷却速率的影响,进而控制中心冷却速率并获得贝氏体组织。结果表明,贝氏体组织形成的临界冷却速度约为1℃/s;冷却速率与钢板表面冷却强度呈指数关系;板厚超过180 mm时临界冷却强度急剧增加,心部很难获得贝氏体组织,且组织均匀性变差。

关键词(KeyWords)： 贝氏体;CCT曲线;临界冷却强度;临界冷却速度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51374018,51174020);; 中央高校基本科研业务费专项资金(FRF-SD-12-010A)

作者(Author): 孟庆勇,王福明,李长荣,崔冠军,唐郑磊

DOI: 10.13289/j.issn.1009-6264.2014.05.021

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