摘要
热变形造成的奥氏体组织结构的变化将影响到热变形奥氏体在随后冷却过程中的相变.依据热模拟试验结果,研究了变形温度、变形速率、变形量和变形后高温停留影响相变过程的微观物理本质,认为变形促进热变形奥氏体的相变,提出变形温度、变形速率和变形后高温停留时间对热变形奥氏体转变过程没有直接联系,但可以通过对再结晶过程的控制影响相变过程.再结晶虽然可能细化了晶粒,但大量消耗了热变形奥氏体中的晶体缺陷,其结果是迟滞了相变过程.
Some changes of the microstructure of austenite caused by hot deformation will affect the phase transformation in austenite during cooling process after hot deformation. The influence of strain rate, deformation temperature, strain magnitude and holding time after deformation on phase transformation were researched in a deep way by physical simulation experiments. This result shows that the deformation promotes the phase transformation of deformed austenite. It is proposed that the strain rate, deformation temperature and holding time have no immediate influence on the phase transformation in deformed austenite, but they may affect the phase transformation through controlling recrystallization process. Though re-crystallization may refine austenite grain, it depletes large quantities of defects in austenite grains, which will retards the phase transformation process.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2003年第10期1522-1525,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(50075053)
关键词
热变形
动态再结晶
相变
Deformation
Microstructure
Phase transitions
Recrystallization (metallurgy)
