Formation kinetics of austenite in pearlitic ductile iron  

作　　者：Payam Abdollahi Alborz Amirsadeghi Shahram Kheirandish Shamsoddin Mirdamadi 

机构地区：[1]Department of Materials Science and Engineering,Iran University of Science and Technology,Tehran 4513863833,Iran

出　　处：《International Journal of Minerals,Metallurgy and Materials》2012年第6期506-510,共5页矿物冶金与材料学报（英文版）

摘　　要：This work evaluated the isothermal transformation of austenite in unalloyed pearlitic ductile iron and drew the isothermal phase diagram of austenitization in the ductile iron, Austenite forms at grain boundaries and then grows up to graphite regions during austenitiza- tion. The formation kinetics of austenite complies with the Avrami equation, in which the parameter （n） ranges from 4.71 to 4.99. The start time and finish time of transformation can be calculated at each temperature using the Avrami equation.This work evaluated the isothermal transformation of austenite in unalloyed pearlitic ductile iron and drew the isothermal phase diagram of austenitization in the ductile iron, Austenite forms at grain boundaries and then grows up to graphite regions during austenitiza- tion. The formation kinetics of austenite complies with the Avrami equation, in which the parameter （n） ranges from 4.71 to 4.99. The start time and finish time of transformation can be calculated at each temperature using the Avrami equation.

关 键 词：cast iron ductility PEARLITE AUSTENITIZATION KINETICS isothermal transformations 

分 类 号：TG143.5[一般工业技术—材料科学与工程]