Q345含Nb低碳钢CSP轧制时动态再结晶的研究

特殊钢 ›› 2005, Vol. 26 ›› Issue (3): 9-11.

Q345含Nb低碳钢CSP轧制时动态再结晶的研究

何建中，刘雅政，史秉华，刘清友，王雪莲，李德刚

北京科技大学材料科学与工程学院，北京100083；
钢铁研究总院，北京100081；
包头钢铁(集团)公司，包头014010

收稿日期:2004-12-15 出版日期:2005-06-01 发布日期:2023-05-10

A Study on Dynamic Recrystallization of a Nb- Bearing Low Carbon Steel Q345C during CSP Rolling

He Jianzhong, Liu Yazheng，Shi Binghua，Liu Qingyou，Wang Xuelian， Li Degang

School of Materials Science and Engineering, university o£ Science and Technology, Beijing 100083；
Central Iron and Steel Research Institute, Beijing 100081；
Baotou Iron and Steel (Group) Co, Baotou 014010

Received:2004-12-15 Published:2005-06-01 Online:2023-05-10
About author:何建中，男,40岁，在读博士生，从事科研管理工作。工作单位:包头钢铁公司。

摘要/Abstract

摘要： 用Gleeble-1500热模拟试验机模拟研究了包钢生产的含Nb Q345C低碳钢(％：0.056C, 1.20Mn, 0.052Nb, 0.033V, 0.012Ti, 0.005 2N)52 mm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=9.70xl0u exP(25 ε_c和Z=1.77x 1012 exp(15.8 ε_s),式中乙变形因子，如开始发生动态再结晶的临界变形量,如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。

Abstract: The true stress - strain curves of Nb- bearing low carbon steel Q345C (0.056C, 1.20Mn, 0.052NB, 0.033V, 0.012Ti, 0.005 2N)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 x10¹¹ exp (25 ε_c and Z = 1.77 x 1012 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.

何建中, 刘雅政, 史秉华, 刘清友, 王雪莲, 李德刚. Q345含Nb低碳钢CSP轧制时动态再结晶的研究[J]. 特殊钢, 2005, 26(3): 9-11.

He Jianzhong, Liu Yazhen, Shi Liu , Liu Qingyou, Wang Xuelian, Li Degang. A Study on Dynamic Recrystallization of a Nb- Bearing Low Carbon Steel Q345C during CSP Rolling[J]. Special Steel, 2005, 26(3): 9-11.