Numerical simulation for permanent mold centrifugal cast TiAl exhaust valve
文献类型：期刊论文
| 作者 | W. B. Sheng ; D. Li |
| 刊名 | Transactions of Nonferrous Metals Society of China
 |
| 出版日期 | 2005 |
| 卷号 | 15期号:3页码:631-635 |
| 关键词 | TiAl alloy exhaust valve permanent mold mathematical model off-center porosity |
| ISSN号 | 1003-6326 |
| 中文摘要 | The filling and solidification in centrifugal field, as well as the forming mechanism of off-center porosities were summarized, based on the mathematical model established for the centrifugal cast TiAl exhaust valves. The calculated results show that the centrifugal field results in the phenomenon that the flow in the valve cavity consists of forward flow and backward flow. The unsymmetrical initial temperature field causes continuous unsymmetrical variation in the following solidification, which makes the final solidified region depart from the cavity axis and then leads to the occurrence of off-center porosity. A series of optimized parameters, including the entrance velocity of 0.6 - 1.3 m/s, the rotation speed higher than 300 r/min, 80 mm or longer entrance length and 400 degrees C or higher preheated temperature of the mold, are suggested for the manufacture of permanent mold centrifugal cast TiAl exhaust valves. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35027]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | W. B. Sheng,D. Li. Numerical simulation for permanent mold centrifugal cast TiAl exhaust valve[J]. Transactions of Nonferrous Metals Society of China,2005,15(3):631-635. |
| APA | W. B. Sheng,&D. Li.(2005).Numerical simulation for permanent mold centrifugal cast TiAl exhaust valve.Transactions of Nonferrous Metals Society of China,15(3),631-635. |
| MLA | W. B. Sheng,et al."Numerical simulation for permanent mold centrifugal cast TiAl exhaust valve".Transactions of Nonferrous Metals Society of China 15.3(2005):631-635. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。