摘要
利用Gleeble-3500热模拟试验机研究了形变温度对0.45%C中碳钢组织演变的影响规律,推导出了0.45%C中碳钢在单向压缩过程中奥氏体的形变储存能与温度补偿形变速率因子Z的关系式,结果表明,形变储存能随着形变温度的降低和形变速率的增大而增加。形变温度降低,形变储存能增加,可以有效地细化铁素体晶粒并促进渗碳体的球化过程。当形变温度为670℃和650℃时,铁素体晶粒细小均匀且碳化物球化效果好。
The effect of deformation temperature on microstructure evolution of 0.45% medium carbon steel is studied using the Gleeble-3500 thermal simulation test machine.The relation between storage energy and Zener-Hollomon parameter of austenite during monodirectional compression is deduced.The results indicate that the storage energy increases as deformation temperature decreases and strain rate increases.With deformation temperature decreasing,the storage energy increases,and the refinement of ferrite grains as well as the globularization of cementite can be promoted.When deformation temperature is 670 ℃ and 650 ℃,the ferrite grains are fine and homogeneously distributed and the globularization of cementite is optimal.
出处
《西安理工大学学报》
CAS
北大核心
2014年第1期73-78,共6页
Journal of Xi'an University of Technology
基金
国家自然科学基金资助项目(51074062)
河北省杰出青年基金资助项目(E2011209029)
河北省高等学校创新团队领军人才培育计划资助项目(LJRC007)
关键词
0
45%C中碳钢
形变温度
形变储存能
组织演变
0.45％C medium carbon steel
deformation temperature
deformation storage energy
microstructure evolution
