新复徐祖耀《评刘宗昌等“贝氏体.....”》一文8).doc

复徐祖耀《评刘宗昌等“贝氏体……”一文》 刘宗昌，计云萍，任慧平，袁长军，段宝玉 （内蒙古科技大学 材料与冶金学院，内蒙古 包头 014010） 摘要：对徐祖耀院士在《评刘宗昌等“贝氏体铁素体的形核”一文》中提出的问题进行了阐述和回复。指出：贝氏体铁素体在晶界形核的新观察验证了形核的一般规律。依据试验观察，理论计算得贝氏体临界晶核尺寸和形核功为：=16.7nm；=25nm，=270J·mol-1，此值合理。奥氏体中贫碳区的存在是普遍事实，试验也测得贝氏体相变孕育期内形成了贫碳区；不能将Spinodal Decomposition与奥氏体中形成贫碳区和富碳区混为一谈。涨落是相变的契机，在孕育期内奥氏体中必由于涨落而形成贫碳区。阐述了非协同热激活跃迁形核机制。大量TTT图分析和实测均表明贝氏体铁素体形核-长大不可能以扩散方式进行。在这些问题上徐祖耀院士的观点，我们不能苟同。 关键词：贝氏体铁素体；晶界形核；扩散；切变；热激活跃迁 Reply to the paper《Comment on the paper…... authored by LIU Zong-chang》authored by XU Zu-yao LIU Zong-chang, JI Yun-ping, REN Hui-ping, YUAN Chang-jun, DUAN Bao-yu （Material and Metallurgy School, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia，China） Abstract: e ferrite nucleation at the grain boundary validates the general rule of nucleation. According to the experimental observation, the calculated values of the critical crystal nucleus dimension and the critical nucleus nucleation energy of the bainite ferrite, which are as follows, a* =16.7 nm, b=25 nm and 270 J?mol-1, are reasonable. The existence of carbon depleted region in austenite is a common fact. Furthermore, the formation of the carbon depleted region in the incubation period of bainite transformation has been measured. Spinodal decomposition and the formation of rich and poor carbon areas in austenite cannot be confused with each other. The incoordinate heat activation transition mechanism of bainite transformation is set forth. The analysis of lots of TTT diagrams and the actual measured results show that the nucleation and growth of bainite ferrite cannot be by means of diffusion. We cannot agree with academician XU Zu-yao’s viewpoints about above issues. Key words: bainite ferrite; grain boundary nucleation; diffusion; shear; heat activation transition 关于贝氏体相变的形核-长大机制一直是切变学派和扩散学派论争的核心问题。刘宗昌等人在2003～2009年间，发表了30余篇论文，出版了两部专著，肯定了两派的成绩，同时也指出了两派的错误，整合了贝氏体相变理论。其中的《贝氏体铁素体的形核》一文（下称“我文”）[1]，徐祖耀院士（以下称徐先生）有异议。这是个老问题，6年前，徐先生与康沫狂教授在《材料热处理学报》上争论过，两人的论文我们拜读过，认为其