12MnMoVN钢中温转变组织及转变动力学特点研究

CHARACTERISTICS OF STRUCTURE AND TRANSFORMATION KINETICS WITHIN MID-TEMPERATURE RANGE OF STEEL 12MnMoVN

试验钢在中温区形成岛状组织(铁素体基体加小岛),其转变动力学曲线形状与铁素体基体的类型有关。铁素体基体为贝氏体铁素体时,其动力学曲线具有(?)崩型特点,而铁素体基体若不是贝氏体铁素体时,其转变动力学曲线并不具有(?)崩型特点。

Island st(?)uctures(ferrite matri(?) with“Islands”)may form within mid-temperature range oftransformation in the tested steel 12MrMoVN.The form of the transformation kinetics curve isclosely related to ferrite transformation mechanism.The ourve exhibits“snowslide”form as theferrite transformation is bainitic.On the cont(?)ary,that does not show snowslide form as thereis no bainitic in the matrix.