Study on Hot Forging Parameter of High Nitrogen Retaining ring steel
The hot forging parameter of Mnl8Crl8N retaining ring steel were studied in the temperature range 9500-1200 ℃ and strain rate range 0.005～0.5 s-1 using hot compression tests. Processing maps for hot working were developed on the basis of the variations of efficiency of power dissipation with temperature and strain rate, interpreted using a dynamic materials model. A hot deformation equation is given to characterize the dependence of peak stress on the temperature and strain rate. A hot deformation apparent activation energy of Mnl8Crl8N is about 563 kJ/mol.The maps exhibit a clear domain with its peak efficiency at about 1100～1150 ℃ and 0.005～0.01 s-1; the domain has its peak efficiency of about 40％ for different strains. On the basis of hot deformation microstructural observations, the full recrystallization region can be identified in the processing map at the domain.
hot forging high nitrogen retaining ring steel Mn18Cr18N efficiency of power dissipation processing maps
Lei Zhu
Mechanical Engineering College Yanshan University Qinhuangdao,China Yunlai Ren Shaomin Nie Mechanical Engineering College Yanshan University Qinhuangdao,China
国际会议
长春
英文
517-521
2010-08-24（万方平台首次上网日期，不代表论文的发表时间）