Transactions of Materials and Heat Treatment

Title：Effect of micro-content cerium on recrystallization behavior of IF steel

Authors： Yang Jichun Yang Changqiao Liu Xiangjun Zhang Jian

Unit： Inner Mongolia University of Science and Technology

KeyWords： Ce IF steel dynamic recrystallization static recrystallization volume fraction

ClassificationCode：TG142.3

year,vol(issue):pagenumber：2014,39(11):91-95

Abstract：

The effects of cerium on the recrystallization behavior of IF steel under different forming conditions were investigated by single and double compression tests on a Gleeble-1500D thermo-mechanical simulator with the method of isothermal compression test. The true stress-strain curves of the tested steel with and without Ce were drawn at temperature 950 ℃, strain rate 0.1~10 s-1, deformation of 50% for single compression and the interval time from 1 to 100 s, at temperature 950 ℃, deformation of 30% for double compression. The results show that dynamic recrystallization is obviously restrained at temperature of 950 ℃ and the strain rate less than 1 s-1, static recrystallization volume fraction is increased with the prolonged interval time and static recrystallization behavior is depressed for the steel with addition of Ce. The drag effect on grain boundary is the main mechanism of cerium's inhibition on recrystallization behavior.

Funds：

国家自然科学基金资助项目（51174114）

杨吉春（1963-），男，博士，教授,博士生导师

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