材料成型及控制工程毕业设计论文.doc

内蒙古科技大学
本科生毕业论文
题目:宽厚板连铸过程中温度场的数值模拟
学生姓名:郑涛
学号:200872146222
专业:材料成型及控制工程
班级:成型08-1班
指导教师:李建超教授
宽厚板连铸过程中温度场的数值模拟
摘要
本文是针对某钢厂宽厚板在连铸凝固过程进行数值模拟研究。运用物理模型和数学模型研究的方法,借助ANSYS商用软件,模拟了板坯在凝固过程中水平截面的温度分布、铸坯温度随时间的变化和铸坯坯壳的生长。比较了拉速对铸坯温度分布、铸坯温度在结晶器中的变化和铸坯坯壳生长的影响。
研究结果表明:模型反映了板坯在结晶器中随时间的变化铸坯温度分布、变化和坯壳的生长过程;拉速对铸坯温度分布、铸坯温度随时间的变化以及坯壳的生长有很大的影响,拉速增加,结晶器内坯壳厚度减薄,坯壳温度升高,保护渣耗量减少,容易产生粘结漏钢。
关键词:宽厚板坯;连铸;结晶器;温度场;数值模拟
Numerical Simulation of Thermal Field of Slab During Continuous Casting
Abstract
This paper takes a research of slab in a steel plant during continuous casting by numerical simulation. The lever cross-section temperature distribution of slab in the solidification, the change of billet’s temperature along with the time and the growth of the billet shell are simulated by the method of the physical model, mathematics model and the mercial software. The effect of the casting speed on the temperature distribution and growth of the billet shell pared.
The results show that the model reflects the temperature distribution, change of temperature and the growth of the billet shell for the solidification process of slab in the mold:The continuous casting speed has high influence on the slab temperature distribution, the change of billet’s temperature along with the time and the shell growth, as the increase of the casting speed,the thickness of billet shell which in the mold will decrease,the temperature of slab will go up,the consume of protection dregs will decrease,based on the above,it's easy to omit liquid steel.
Key words: wide slab; continuous casting; mold; thermal field; numerical simulation

目录
摘要 Ⅰ
Abstract Ⅱ
第一章文献综述 1
1
2
3
3
4
4
数值模拟技术 4
ANSYS有限元软件 5
ANSYS热分析 6
7
7
9
第二章宽厚板坯连铸凝固传热过程数学物理模型的建立 11
11
板坯连铸机整体结构示意图 11
连铸机参数 12
板坯连铸凝固模型的