摘要
采用三维瞬态传热有限元方法,对13 t锻造钢锭和钢锭模在凝固过程中的温度场分布进行了数值计算及分析,探讨了钢锭内部凝固速度变化和钢锭模在凝固过程中的温度分布规律。分析结果表明,钢锭本体距离底部60%-70%的部位纵向凝固速度受横向凝固速度的影响而大大加速;凝固开始阶段,钢锭模内壁温升速度远大于模外壁,随后外壁温升速度迅速增大,随着钢锭凝固的进行,壁内外温差逐渐减小。本模拟可为优化钢锭模设计、提高钢锭质量提供依据。
The temperature field of 13-ton ingot and mould was simulated and studied by utilizing three-dimensional transient FEM and the change of solidified velocity in ingot and the regularity of temperature distribution in mould were discussed. The results show that longitudinal solidified velocity is accelerated by lateral ones at the place which is 60 % -70 % apart from the ingot bottom. Initially, the temperature rise velocity of the inner wall is far larger than that of the outer wall for the mould, the temperature difference between inner and outer walls is reduced as the solidification is proceeding. This conclusion may provide basis for the optimizing designation of mould and improvement of the ingot quality.
出处
《铸造技术》
CAS
北大核心
2007年第2期268-270,共3页
Foundry Technology
基金
陕西省自然科学基金项目(批准号:2004E226)
