摘要
本文研究了含Ｃ１．７７％的半钢热变形时奥氏休动态再结晶行为。研究结果表明，在９５０℃以下进行热变形时，存在一种新的动态再结晶现象：热变形奥氏体不经过形核过程直接碎化为若干个晶粒；其动态再结晶机制是“亚晶界独立生长成为大角度晶界”。在９５０℃以上或以下的温度范围内，热变形激活能的值也不同；在９５０℃上热变形激活能为６４８．４ｋＪ／ｍｏｌ，在９５０℃以下热变形激活能为４８５．１ＫＪ／ｍｏｌ。
AbstractThis paper discribes the dynamic recrystallization of austcnite during hot deformation of semisteel .The result shows that , when the hot deformation is carried out bellow950℃,exists a new dynamic recrestallization behaviour:hot deformed austenite can be directly disintegra- ted onto several grains without nucleation process.The mechanism of the dynamic recrystalli- zaton is:quasi -crystal boundary independently grows into Iargc angle boundary. The hot defor- mation activation energies beyond and below 950 ℃ are not same:the forme,is 648.4 kJ/mol;the Iatter is 485.1 kJ/mol.
出处
《钢铁》
CAS
CSCD
北大核心
1994年第9期52-57,共6页
Iron and Steel
