摘要
对热变形奥氏体的再结晶动力学和微观组织演变进行了模拟计算,对晶粒尺寸的模拟值和实测值作了比较,分析了化学成分对动态再结晶率的影响以及残余应变与变形温度的关系。结果表明:在温度较高、应变速率较低的条件下容易发生动态再结晶,随着变形温度的降低,发生动态再结晶的几率减小,而静态再结晶在前几道次进行得比较充分,随后进行得不充分,增加碳和锰的含量可以促进动态再结晶的发生,残余应变随变形温度的降低而增大,晶粒尺寸的模拟值和实测值吻合较好,表明所选用的模型有一定的参考价值。
The recrystallization and microstructure evolution of hot-deformed austenite was simulated, and the relationship between chemical composition and dynamic recrystallization fraction, residual strain and deformed temperature were analyzed. The results showed that the dynamic recrystallization is occurred easily when temperature and strain-rate are higher, and it is hardly occurred at lower temperature. But the static recrystallization can be developed perfectly on first passes, and with the decreasing of interval time between two passes, the static recrustallization becomes difficult to occur. The increase of carbon and manganese accelerates dynamic recrystallization. The residual strain is larger at low temperature than at high temperature. The calculated results of austenite grain size fit well with the measured, and the model of recrystallization is quite valuable.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2006年第5期46-49,共4页
Journal of Iron and Steel Research
基金
国家863计划资助项目(2001AA339030)
关键词
奥氏体
应变速率
动态再结晶
静态再结晶
残余应变
低碳钢
austenite
strain-rate
dynamic recrystallization
static recrystallization
residual strain
low carbon steel
作者简介
李治华（1977-）,女,硕士; E-mail：lzh_zwp@21cn.com;
