| 激光重熔对Al-Si合金快速凝固共晶生长的数值模拟 |
| |
| 引用本文： | 高昕.激光重熔对Al-Si合金快速凝固共晶生长的数值模拟[J].光子学报,1998,27(6):543-548. |
| |
| 作者姓名： | 高昕 |
| |
| 作者单位： | 北京跟踪与通信技术研究所(高昕)，西北工业大学航天工程学院(宋凯英)，西北工业大学应用物理系(宋宙模) |
| |
| 摘 要： | 本文通过数值模拟,计算出Al-Si合金共晶共生区,达到对实际加工中激光处理参数的优化。数学模型从计算物体表面温度场三维分布入手,考虑到激光空间Gaus分布特性,得到物体表面温度梯度分布;同时结合枝晶分布KGT模型以及共晶分布经修正的TMK模型,计算了微观结构的共晶生长的范围,得到一个完整的从激光重熔到共晶生长的计算模型。
|
| 关 键 词： | 激光重熔 数值模拟 快速凝固 共生区 |
| 收稿时间： | 1997-11-04 |
NUMERICAL SIMULATION OF LASER SURFACE REMELTING AND RAPID SOLIDIFICATION FOR Al Si ALLOY IN EUTECTIC SYMBIONIC ZONE |
| |
| Gao Xin Beijing Institute of Tracking and communication Technology,Beijing Song Kaiying, Song Zhoumo College of astronautics engineering,.NUMERICAL SIMULATION OF LASER SURFACE REMELTING AND RAPID SOLIDIFICATION FOR Al Si ALLOY IN EUTECTIC SYMBIONIC ZONE[J].Acta Photonica Sinica,1998,27(6):543-548. |
| |
| Authors: | Gao Xin Beijing Institute of Tracking and communication Technology Beijing Song Kaiying Song Zhoumo College of astronautics engineering |
| |
| Institution: | 1) Gao Xin 1)Beijing Institute of Tracking and communication Technology,Beijing 100094 2) Song Kaiying,3) Song Zhoumo 2) College of astronautics engineering,3) Department of applied physics,Northwestern Polytechnic |
| |
| Abstract: | In this paper,the eutectic symbionic zone for Al Si alloy has been calculated by numerical simulation.It is expected to use the symbionic zone in laser processing as a method of optimizing the laser technical parameters.The numerical model takes into account of Gauss distribution of laser beam spot,and then the three dimensional temperature distribution and surface temperature gradient have been calculated.Using KGT model for dendrite and modified TMK model for eutectic,the complete eutectic microstructures are obtained,the laser power density and the scanning velocity has been optimized. |
| |
| Keywords: | Laser remelting Numerical simulation Rapid solidification Symbionic zone |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《光子学报》浏览原始摘要信息 |
| 点击此处可从《光子学报》下载免费的PDF全文 |
