Flow Behavior and Dynamic Recrystallization Mechanism of CSS‑42L Bearing Steel During Hot Compression Deformation  

作　　者：Tianyi Zeng Zirui Luo Hao Chen Wei Wang Ke Yang 

机构地区：[1]School of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou 412007,China [2]Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [3]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China [4]CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2025年第3期465-480,共16页金属学报(英文版)

基　　金：fnancially supported by the Scientifc Research Project of the Department of Education in Hunan Prov ince,China(Grant No.23B0533).

摘　　要：In this work,fow behavior and dynamic recrystallization(DRX)mechanism of a low carbon martensitic stainless bearing steel,CSS-42L,were investigated using a thermomechanical simulator under the temperature and strain rate ranges of 900 to 1100℃ and 0.1 to 20 s^(−1),respectively.The Arrhenius-type constitutive equation was established based on the fow stress curves.Moreover,the peak stress decreased with the increase in deformation temperature and the decrease in strain rate.There were two DRX mechanisms during hot deformation of the current studied steel,the main one being discontinuous dynamic recrystallization mechanism,acting through grain boundary bulging and migration,and the auxiliary one being continuous dynamic recrystallization mechanism,working through the rotation of sub-grains.On the basis of microstructural characterizations,power dissipation maps and fow instability maps,the optimized hot deformation parameters for CSS-42L bearing steel were determined as 1050℃/0.1 s^(−1) and 1100℃/1 s^(−1).

关 键 词：CSS-42L bearing steel Hot deformation Flow stress Constitutive equation Discontinuous dynamic recrystallization Continuous dynamic recrystallization 

分 类 号：TG1[金属学及工艺—金属学]