The formation of austenite from mixtures of ferrite and cementite as observed by HVEM
The formation of austenite from mixtures of ferrite and cementite as observed by HVEM
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HVEM 观察到铁素体和渗碳体混合物形成奥氏体
DOI：
10.1007/bf02661753
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
M. Nemoto
中科院分区：
文献类型：
--
作者：
M. Nemoto
本文用高压电子显微镜原位实验研究了不同铁素体和奥氏体混合物转变的详细机制。当γ/α界面弯曲时，观察到各种似乎受碳扩散速率控制的现象。用工业钢研究了锰的影响。与基于局部平衡模型的理论预测一致，锰或多或少地可以阻止铁素体中的铁素体的溶解。对奥氏体中的溶解影响较小。从片状珠光体到奥氏体的反应更复杂，片状珠光体为奥氏体提供碳，但也充当屏障。
The detailed mechanism of the transformation of various mixtures of ferrite and austenite was studied byin situ experiments in a high voltage electron microscope. Various phenomena were observed which seemed to be controlled by the rate of carbon diffusion when the γ/α interface was curved. The effect of manganese was studied by using commercial steels. In agreement with theoretical predictions based upon the local equilibrium model, the dissolution of cementite in ferrite can be more or less prevented by manganese. The effect on the dissolution in austenite is smaller. The reaction from lamellar pearlite to austenite is more complex, the cementite lamellae providing carbon to the austenite but also acting as barriers.