eutectoid reaction

英

美

共析转变，共析反应

Calculation of the driving force for nucleaction ( growth) gives an evidencs that the leading phase of the eutectoid reaction in hypoeutectoid steels is ferrite while that in hypereutectoid steels is cementite.
由形核（长大）驱动力的计算证明，亚共析钢共析反应的领先相为铁素体，而过共析钢的领先相为渗碳体。
The experiment results show that the connection zone may be divided into multicomponent eutectoid, tungsten carbide and narrow ferrite and the interface is found to be a metallurgical bond because of the element diffusion, metallurgy reaction and formation of the new compound phase during the cast-in process.
实验结果表明：结合层是由窄小的铁素体带和多元共析体+条块状WC组成，界面元素发生扩散及冶金反应并有新相产生，呈典型的冶金结合。
Both the austenite-graphite eutectic reaction temperature and eutectoid reaction temperature are higher than those of austenite-cementite.
奥氏体-石墨共晶和共析反应温度也都高于奥氏体-渗碳体的共晶和共析反应温度。
When cooling, peritectic reaction between α-Mg and Zr happened in the Zn-rich area in the grains, while eutectic reaction and eutectoid reaction happened in grain boundaries.
冷却时，α-Mg与Zr在晶内富Zn处发生包晶反应，晶界处发生共晶反应和共析反应。