Metadynamic Recrystallization Behavior of As-cast 904L Superaustenitic Stainless Steel  

作　　者：Wei ZHANG Jing ZHANG Ying HAN Rong LIU De-ning ZOU Guan-jun QIAO 

机构地区：[1]State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University [2]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University [3]Key Laboratory of Advanced Structural Materials of Ministry of Education,Changchun University of Technology [4]School of Metallurgy and Engineering,Xi'an University of Architecture and Technology

出　　处：《Journal of Iron and Steel Research International》2016年第2期151-159,共9页

基　　金：Item Sponsored by National Natural Science Foundation of China(U1460104);Fund of State Key Laboratory of Solidification Processing in NWPU of China(SKLSP201322)

摘　　要：The metadynamic recrystallization （MDRX） behavior of as-cast 904L superaustenitic stainless steel was in- vestigated by double pass isothermal compression tests at temperatures of 950-1 150 ℃, strain rates of 0.05-5 s 1 and interval of 1-100 s. The effects of working parameters （deformation temperature, strain rate, pre-strain and in- terval time） on the flow curves and microstructural evolution were discussed. The MDRX fraction increased obvious- ly with the increase of deformation temperature, strain rate and interval time. The MDRX softening was controlled by the migration of grain boundary, annihilation of dislocation and dynamic recrystallization. Moreover, the kinetic model was established for the prediction of MDRX behavior of as-cast 904L superaustenitic stainless steel based on the experimental data. A good agreement between the predicted and the experimental values was achieved （correla- tion coefficient R2= 0.98）, indicating a satisfactory accuracy.The metadynamic recrystallization （MDRX） behavior of as-cast 904L superaustenitic stainless steel was in- vestigated by double pass isothermal compression tests at temperatures of 950-1 150 ℃, strain rates of 0.05-5 s 1 and interval of 1-100 s. The effects of working parameters （deformation temperature, strain rate, pre-strain and in- terval time） on the flow curves and microstructural evolution were discussed. The MDRX fraction increased obvious- ly with the increase of deformation temperature, strain rate and interval time. The MDRX softening was controlled by the migration of grain boundary, annihilation of dislocation and dynamic recrystallization. Moreover, the kinetic model was established for the prediction of MDRX behavior of as-cast 904L superaustenitic stainless steel based on the experimental data. A good agreement between the predicted and the experimental values was achieved （correla- tion coefficient R2= 0.98）, indicating a satisfactory accuracy.

关 键 词：superaustenitic stainless steel hot deformation metadynamic recrystallization 

分 类 号：TG142.71[一般工业技术—材料科学与工程]