Effect of Austenite Deformation on Continuous Cooling Transformation Microstructures for 22CrSH Gear Steel  

作　　者：WANG Bing-xin JIANG Ying-tian XU Xu-dong LIU Xiang-hua WANG Guo-dong 

机构地区：[1]College of Mechanical Engineering, Liaoning University of Petroleum and Chemical Technology, Fushun 113001, Liaoning, China [2]State Key Lab of Technology and Automation, Northeastern University, Shenyang 110004, Liaoning, China

出　　处：《Journal of Iron and Steel Research International》2007年第1期69-73,共5页

基　　金：Item Sponsored by National Basic Research Programof China (G2000067208-4)

摘　　要：The effect of compressive deformation of austenite on continuous cooling transformation microstructures for 22CrSH gear steel has been investigated using a Gleeble 1500 thermal simulator. The experimental results show that the deformation of austenite promotes the formation of proeutectoid ferrite and pearlite, and leads to the increase of critical cooling rate of proeutectoid ferrite plus pearlite microstructure. The grain boundary allotriomorphic ferrite occupies the austenite grain surfaces when the prior deformation takes place or the cooling rate is decreased, which causes a transition from bainite to acicular ferrite. The deformation enhances the stability of transformation from austenite to acicular ferrite, which results in an increase of M/A constituent.The effect of compressive deformation of austenite on continuous cooling transformation microstructures for 22CrSH gear steel has been investigated using a Gleeble 1500 thermal simulator. The experimental results show that the deformation of austenite promotes the formation of proeutectoid ferrite and pearlite, and leads to the increase of critical cooling rate of proeutectoid ferrite plus pearlite microstructure. The grain boundary allotriomorphic ferrite occupies the austenite grain surfaces when the prior deformation takes place or the cooling rate is decreased, which causes a transition from bainite to acicular ferrite. The deformation enhances the stability of transformation from austenite to acicular ferrite, which results in an increase of M/A constituent.

关 键 词：gear steel prior compressive deformation AUSTENITE TRANSFORMATION MICROSTRUCTURE 

分 类 号：TH133[机械工程—机械制造及自动化]