The Q345 plate steel austenite recrystallization behavior and strain accumulation during rolling were investigated through thermal simulation and rolling. The effect of the recrystallization behavior on the microstructure and properties of the steel was discussed and analyzed. The control principles of the pass reduction in the austenite recrystallization region and partial recrystallization region were established. It is found that to increase the thickness of intermediate billet in the finish temperature interval of 880-820 ℃ is favorable to grain refinement.The result has been applied to the industrial production of the 3 500 mm plate mill of Shougang Group. The average grain size of the steel plate conforms to ASTM No. 10-12, and the grade of band structure has been reduced to below 1.5.
参考文献
| [1] | YONG Q L.Microalloyed Steel-Physical and Mechanical Metallurgy[M].北京:机械工业出版社,1989 |
| [2] | Taku Sakai .Advances in Dynamic Recrystallization and Its Related Phenomena[J].Iron and Steel,1995,81(01):1-8. |
| [3] | Zajac S;Siwecki T;Hutchinson B et al.Weldability of High Nitrogen Ti-V Microalloyed Steel Plates Processed via Thermomechanical Controlled Rolling[R].Swedish Institute for Metals Research,Internal Report,1991. |
| [4] | Atsuhiko Yoshie .Effect of Dislocation Density in an Unrecrystallized Part of Austenite on Growth Rate of Recrystallizing Grain[J].Iron and Steel,1994,80(12):50-55. |
| [5] | Atsuhiko Yoshie .Formulation of the Decrease in Dislocation Density of Deformed Austenite due to Static Recovery and Recrystallization[J].Iron and Steel,1994,80(12):44-49. |
| [6] | 范建文,易敏,陈明跃,朱伏先,赵胜国.细晶强化Q345中板的控轧控冷工艺研究[J].轧钢,2003(01):11-14,32. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%