PRECIPITATION BEHAVIOR OF CARBON-NITRIDES IN MICROALLOYED OFFSHORE PLATFORM PLATE
Thermal simulator and transmission electron microscope(TEM)were adopted to investigate the precipitation behavior in different stage of controlled rolling,controlled cooling and the effect of cooling route on precipitation.It is found that the undissolved cuboid precipitates TiN in reheating process was covered by Nb precipitates during rolling process and the content of Nb increased relatively.The strain-induced NbC precipitates were found to be spherical shaped when waiting for a few seconds after rough rolling.The size of precipitates obtained from two-stage cooling process,in which fast and slow cooling were employed respectively,was much smaller and sparse distributed than that obtained from one stage cooling process with slow cooling rate and that is beneficial for precipitation strengthening.The results supplies the theoretical basis for practical application.
controlled rolling and controlled cooling precipitate cooling route offshore platform plate
DI Guo-biao SHEN Qin-yi LIU Mei-yan JIA Tao MA Qing-shen LIU Zhen-yu
Shougang Research Institute of Technology,Beijing,100041 The State Key Laboratory of Rolling & Automation of Northeastern University,Shenyang,110004
国内会议
杭州
英文
1071-1077
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）