| Cu-12%Al线材连续定向凝固最大稳态拉坯速度 |
| |
| 引用本文： | 刘锦平,刘雪峰,黄海友,谢建新.Cu-12%Al线材连续定向凝固最大稳态拉坯速度[J].中国有色金属学报,2011,21(1). |
| |
| 作者姓名： | 刘锦平 刘雪峰 黄海友 谢建新 |
| |
| 作者单位： | 1. 北京科技大学 材料先进制备技术教育部重点实验室,北京,100083
2. 北京科技大学 新材料技术研究院,北京,100083 |
| |
| 基金项目： | 国家重点基础研究发展计划资助项目，国家自然科学基金资助项目 |
| |
| 摘 要： | 将结晶器移出感应加热器,使连续定向凝固时固液界面控制在结晶器出口;结合传热边界条件,求解连续定向凝固熔体区、液/固界面、空冷区和水冷区的一维稳态温度场方程,得出线坯最大稳态拉坯速度随熔体温度、结晶器长度、冷却距离和冷却水流量的变化规律;并基于直径为6 mm的Cu-12%Al(质量分数)线材制备的工艺条件,对理论解进行实验验证和讨论.结果表明:Cu-12%Al线材的最大稳态拉坯速度随熔体温度升高而降低,且降低速率逐渐减小,其中在1 150～1 300 ℃范围内降低37.3%;最大稳态拉坯速度随结晶器长度增加而增加,且增加速率逐渐减小,其中在20～40 mm范围内增加28.5%;最大稳态拉坯速度随冷却距离增加而降低,且降低速率逐渐减小,其中在4～12 mm范围内降低68.8%;冷却水流量在100～400 L/h范围内最大稳态拉坯速度变化不明显.当固液界面前沿温度梯度小于2.02 ℃/mm时,实际拉坯速度无法达到理论最大稳态拉坯速度;当固液界面前沿温度梯度大于4.17 ℃/mm时,最大稳态拉坯速度实验值和理论值吻合较好.
|
| 关 键 词： | Cu-12％Al线材 拉坯速度 温度场 结晶器长度 温度梯度 |
Maximum steady-state drawing velocity of Cu-12%Al wires during OCC |
| |
| LIU Jin-ping,LIU Xue-feng,HUANG Hai-you,XIE Jian-xin.Maximum steady-state drawing velocity of Cu-12%Al wires during OCC[J].The Chinese Journal of Nonferrous Metals,2011,21(1). |
| |
| Authors: | LIU Jin-ping LIU Xue-feng HUANG Hai-you XIE Jian-xin |
| |
| Affiliation: | LIU Jin-ping,LIU Xue-feng,HUANG Hai-you,XIE Jian-xin (1.Key Laboratory of Advanced Materials and Manufacturing Technologies,Ministry of Education,University of Science and Technology Beijing,Beijing 100083,China,2.Institute for Advanced Materials and Technologies,China) |
| |
| Abstract: | By moving out of induction heater for crystallizer,the solid-liquid interface was controlled at the exit of crystallizer during Ohno continuous casting(OCC).Based on the temperature field equations of melt region,liquid/solid interface,air cooling region and water cooling region,the relationship was deduced among the maximum steady-state drawing velocity,melt temperature,crystallizer length,cooling distance and water flow rate by using thermal boundary conditions.Through the solidification process of Cu-12%... |
| |
| Keywords: | Cu-12%Al wire drawing velocity temperature field crystallizer length thermal gradient |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
