形变温度对0.45％C中碳钢形变储存能和组织演变的影响  

The effect of deformation temperature on storage energy and microstructure evolution of 0.45%C medium carbon steel

作　　者：梁精龙[1,2] 冯运莉[2] 弥弘尧 苍大强[1] 

机构地区：[1]北京科技大学冶金与生态学院,北京100083 [2]河北联合大学冶金与能源学院河北省现代冶金技术重点实验室,唐山063009

出　　处：《西安理工大学学报》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)

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.

关 键 词：0 45%C中碳钢 形变温度 形变储存能 组织演变 

分 类 号：TG142.31[一般工业技术—材料科学与工程]