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本文作者在上届全国电子光学会议上曾发表文章指出T.Gladman等提出的关于奥氏体晶粒长大机构的弥散第二相质点对晶界的钉扎理论不适合解释合金结构钢的奥氏体晶粒的混晶长大过程。作者根据对奥氏体晶粒长大过程的实际观察,发现这些钢中的奥氏体晶粒长大过程应分为四个阶段。其中在混晶长大阶段中(第二阶段)发生的取向相近晶粒团内的小角界分解过程是造成混晶的主要原因。并指出这种混晶出现的过程完全不能用T.Gladman提出的钉扎理论,应该另外建立小角界分解模型来加以解释。
The author at the last National Electron Optics Conference has published an article pointed out that T.Gladman et al proposed austenite grain growth mechanism of the second phase of the grain boundary mass pinning theory is not suitable for explaining the structure of the Austrian alloy steel Mixed growth of the grain of the crystal growth process. Based on the actual observation of the austenite grain growth process, the authors found that the austenite grain growth in these steels should be divided into four stages. Among them, during the growth phase of mixed crystal (the second phase), the orientations similar to the small-angle boundary decomposition in the grain are the main reasons for the mixed crystal. And pointed out that the process of mixed crystals can not be used T.Gladman pinning theory, should be another small corner decomposition model to be explained.