重型机械Issue(3)：54-60,7.
特厚板坯连铸蠕变过程热力耦合数值模拟
Thermodynamic coupling numerical simulation on the creep process of extra-thick slab continuous casting
林威 1何博 1王文学 1候凯凯 1陈乐彤1
作者信息
- 1. 中国重型机械研究院股份公司,陕西 西安 710018
- 折叠
摘要
Abstract
Based on the creep parameters of steel Q345 at high temperature,a suitable creep expression for Q345 is established.By combining the calculated temperature with the actual temperature,the convection heat transfer coefficient in the secondary cooling zone of Q345 continuous casting was calculated by the finite difference method.Taking the improved convective heat transfer coefficient as the boundary condition,the temperature,variation trend and shell thickness of the billet at various positions during the continuous casting process were calculated.The results show that,except for the corner of the billet,all the positions of the billet are in a certain temperature range and show a downward trend,and the thickness of the billet shell slowly increases to 21 mm.By the thermodynamic coupling numerical simulation method The creep strain,the equivalent stress and the total equivalent plastic strain at the joints 0～30 mm away from the outer arc surface were calculated under different drawing speeds.The calculation results show that stress relaxation occurs during the continuous casting process,and plastic strain only occurs when the slab first enters the arc segment,which greatly reduces the risk of surface cracks,thus enabling efficient and stable production of extra-thick continuous casting slab at ultra-low strain rates.关键词
特厚板坯/数值模拟/热力耦合/蠕变Key words
extra thick slab/numerical simulation/thermodynamic coupling/creep分类
矿业与冶金引用本文复制引用
林威,何博,王文学,候凯凯,陈乐彤..特厚板坯连铸蠕变过程热力耦合数值模拟[J].重型机械,2024,(3):54-60,7.
