| 铸锭凝固过程中的对流及液相区成分变化的模拟实验研究 |
| |
| 引用本文： | 介万奇,周尧和. 铸锭凝固过程中的对流及液相区成分变化的模拟实验研究[J]. 金属学报, 1988, 24(6): 457-462 |
| |
| 作者姓名： | 介万奇 周尧和 |
| |
| 作者单位： | 西安市西北工业大学403教研室，西北工业大学 |
| |
| 摘 要： | 采用凝固过程和对流条件与碳钢相似的NH_4Cl水溶液模拟实验,研究了铸锭凝固过程中的对流及液相区的成分变化。染色液示踪的结果表明,dρ_L/dT_L>0的溶液凝固过程中,侧向凝固的两相区中液相向上流动,并自上部流入液相区后,浮在液相区的上部形成一个弱对流区(第Ⅲ对流区)。随着来自两相区液相的不断补充,该区向下扩展。成分分析发现,第Ⅲ对流区内NH_4Cl浓度低于原液相区。向溶液中加入Na_2SO_4或NaI·2H_2O可以平衡两相区内液相密度的变化,抑制两相区的流动和第Ⅲ对流区的形成,从而消除液相区上部的低NH_4Cl区。
|
| 关 键 词： | 液相区 两相区 对流 液相区成分变化 |
| 收稿时间： | 1988-06-18 |
| 修稿时间： | 1988-06-18 |
MODELING STUDY OF CONVECTION AND CONSTITUTION VARIATION IN INGOT DURING SOLIDIFICATION |
| |
| JIE Wanqi,ZHOU Yaohe Northwestern Polytechnical University,Xi''''an. MODELING STUDY OF CONVECTION AND CONSTITUTION VARIATION IN INGOT DURING SOLIDIFICATION[J]. Acta Metallurgica Sinica, 1988, 24(6): 457-462 |
| |
| Authors: | JIE Wanqi ZHOU Yaohe Northwestern Polytechnical University Xi''''an |
| |
| Abstract: | Convection and constitution variation of liquid metal during solidifi-cation has been studied using NH_4Cl agueous solution. The liquid in mushy zoneattached to the side wall of the mold will flow upward and forms a low concen-tration region, in which no significant convection occurs, on the top of liquidzone. This region develops downward gradually during solidification. Addition ofadequate component may suppress the formation of this region. |
| |
| Keywords: | Liguid zone mushy zone convection constitution variation |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《金属学报》浏览原始摘要信息 |
|
点击此处可从《金属学报》下载全文 |
|
