摘要
以晶界迁移机制进行再结晶的材料,其稳定动态再结晶晶粒尺寸D取决于形变ZenerHol1omon参数(Z因子)。作者建立了反映DZ间关系的理论模型,进行了St41钢平面应变热变形动态再结晶实验,探讨了动态再结晶晶粒细化的机理。该理论模型为Sellars的经验公式提供了物理基础。研究结果表明,提高形变储存能是细化动态再结晶晶粒的重要途径。
The steady state grain size for dynamic recrystallization (DRX) by grain boundary migration is simply related to Zener Hollomon parameter. A mathematical model is developed to show such a relation. Plane strain compressive tests are conducted to investigate the DRX behavior of St41 steel. The mechanism of grain refinement during DRX is discussed. The model provides a physical basis for the Sellars’empirical relation. The results show that increasing stored energy is the key approach to refine the grain size during DRX.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2000年第1期26-30,共5页
Journal of Iron and Steel Research
基金
国家自然科学基金!资助项目 ( 5 95 0 10 10 )
关键词
动态再结晶
晶粒尺寸
热变形
控制轧制
dynamic recrystallization
grain size
Zener Hollomon parameter
hot deformation
