摘要
用Gleeble -1 50 0热模拟试验机模拟研究了包钢生产的含NbQ3 4 5C低碳钢( % :0 0 56C ,1 2 0Mn ,0 . 0 52Nb ,0 . 0 3 3V ,0 .0 1 2Ti,0 0 .0 52N) 52mm连铸坯在CSP(紧凑式带材生产)轧制时的高温变形过程中真应力应变曲线,回归得出动态再结晶数学模型和动态再结晶的临界条件:Z =9.70×1 0 11exp( 2 5εc)和Z =1 .77×1 0 12 exp( 1 5.8εs) ,式中Z- 变形因子,εc -开始发生动态再结晶的临界变形量,εs -发生完全再结晶的临界变形量。利用动态再结晶判定图,避开轧制道次间的部分再结晶区进行轧制,可有效地降低钢板中的混晶组织。
The true stress - strain curves of Nb- bearing low carbon steel Q345C (0.056C, 1.20Mn, 0.052Nb, 0.033V, 0.012Ti, 0.005 2 N) 52 mm concasting thin slab during high temperature deformation by CSP (compact strip production) rolling have been simulated and studied by Gleeble-1500 thermal simulation tester, and the mathematical model and critical conditions of dynamic recrystallization have been obtained, that are Z = 9.7×10 11 exp (25 ε c) and Z = 1.77×10 12 exp (15.8 ε s), where Z- deformation factor, ε c- critical deformation of initially occurred dynamic- recrystallization, ε s- critical deformation of complete recrystallization. It is available to decrease mixed grain size structure in plate by utilizing recrystallization model to avoid rolling in incomplete recrystallization zone between rolling pass.
出处
《特殊钢》
北大核心
2005年第3期9-11,共3页
Special Steel
基金
中信CBMM铌研究与开发资助项目
2003RMJSKY003。
