基于有限差分法的海底管线用钢X65MO冷却工艺优化
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摘要
针对X65MO管线钢生产过程中由于钢板整板性能均匀性较差(如钢板中部性能合格,但头尾性能不合)而引起的产品合格率较低问题,研究轧后冷却工艺对钢板纵向温度分布的影响。通过有限差分温度场模拟和现场试验,优化X65MO冷却工艺,减小钢板头尾屈服强度的下降量,提高钢板整板性能的均匀性,从而提高产品合格率。
Aiming at the low qualification rate caused by the asymmetry of the whole plate,such as the unbalanced performance between the ends and the middle part,during the X65MO pipeline steel manufacturing,this paper investigated the effect of the post rolling cooling procedure on the longitudinal temperature distribution. By conducting finite difference method (FDM) analysis on temperature distribution and plant trials to optimize cooling process,the yield strength drops at the ends of a plate after cooling was markedly decreased,which optimizes the uniform mechanical property distribution over the full-length of a plate,and thereby increased the overall production yield significantly.
Aiming at the low qualification rate caused by the asymmetry of the whole plate,such as the unbalanced performance between the ends and the middle part,during the X65MO pipeline steel manufacturing,this paper investigated the effect of the post rolling cooling procedure on the longitudinal temperature distribution. By conducting finite difference method (FDM) analysis on temperature distribution and plant trials to optimize cooling process,the yield strength drops at the ends of a plate after cooling was markedly decreased,which optimizes the uniform mechanical property distribution over the full-length of a plate,and thereby increased the overall production yield significantly.
引文
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[4]曾凡德.中厚板冷却过程温度场模型及其最优跟踪控制的研究[D].沈阳:东北大学,2008.
[5]崔青玲,赵民,袁国,等.钢板轧后冷却过程的数值模拟及变形分析[J].钢铁研究学报,2007,19(9):22.
[6]唐广波.热轧带钢热轧区物理冶金过程数值模拟及应用研究[D].北京:北京科技大学,2008.
[7]栗春,田鹏,宋焕军,等.中厚板冷却过程高精度温度模型[J].钢铁研究学报,2010,22(8):27.
[8]陈水宣.热轧带钢温度建模和数值模拟[D].杭州:浙江大学,2008.
[9]张德丰.X65管线厚板控冷过程的相变效应研究与数值模拟[D].昆明:昆明理工大学,2011.
[10]任毅,张帅,王爽,等.开冷温度对高性能海底管线用0.08C-1.5Mn-Nb钢组织性能的影响[J].2013,38(12):65.
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[12]齐滨.宽厚板生产线高精度冷却控制的方法[J].自动化与仪器仪表,2011(3):92.