Influence of Multi-step Cumulative Deformation on Static Recrystallization of Steel 26Cr2Ni4MoV
a niliyong@yahoo.com.cn, b kpc1229@hotmail.com, c liuzb@ysu.edu.cn Considering the difficulty for the dynamic recrystallization to happen in Steel 26Cr2Ni4MoV, which was used to manufacture low-pressure steam turbine rotors generally, after-forging static recrystallization was studied with the thermo-torsion method. In order to investigate the influence of multi-step cumulative deformation on after-forging static recrystallization of Steel 26Cr2Ni4MoV, the thermo-torsion method was adopted to conduct a constant-temperature four-step torsion test at 900 ℃. The time gap between each step in the test agreed with that in real production. Results show that the influence of multi-step cumulative deformation on after-forging static recrystallization is almost the same with that of single-step deformation. It means that the nucleation and the growth of after-forging static recrystallization are related mainly to the last deformation and temperature-keeping time. Grain size can be controlled through the last deformation and temperature-keeping time. There should be minute deformation left for the last deformation sequence, to encourage the refining of crystals.The findings supply the theoretical foundation for the said-steel controlled forging processes.
L.Y.Ni P.C.Kang A.B.Wang S.Q.Yu Z.B.Liu
College of Engineering, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China College of Me School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001,Heilongji Mechanical and Electronic Faculty,Xingtai Polytechnic College,Xingtai 054035,China College of Mechan College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei,China
国际会议
桂林
英文
1-5
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）