Forming mechanism of gaseous defect in Ti-48Al-2Cr-2Nb exhaust valves formed with permanent mold centrifugal casting method

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	Forming mechanism of gaseous defect in Ti-48Al-2Cr-2Nb exhaust valves formed with permanent mold centrifugal casting method
	W. B. Sheng; J. J. Guo; Y. Q. Su; H. S. Ding; J. Jia
	2001
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	17 期号:5 页码:569-571
摘要	A method combining theoretical analysis with experiment is adopted and the flowing process of Ti-48Al-2Cr-2Nb alloy melt poured in a permanent mould during the centrifugal casting process has been analyzed. A mathematical model of the filling process is established and the forming mechanism of internal gaseous defect is summarized. The results of calculation show that the melt fills the mould with varying cross-section area and inclined angle. The filling speed of the cross-section is a function of filling time. The cross-section area is directly proportional to the filling speed and the inclined angle is inversely proportional to the filling speed at a given rotating speed of the platform. Both of them changes more obvious near the mould entrance. The gaseous defect can be formed in several ways and the centrifugal field has an important influence on the formation of the defect. In addition, the filling process in centrifugal field has been verified by wax experiments and the theoretical analysis are consistent with experimental results.
部门归属	harbin inst technol, sch mat sci & engn, harbin 150001, peoples r china.;sheng, wb (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Intermetallics Aluminides Alloys
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36796
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. B. Sheng,J. J. Guo,Y. Q. Su,et al. Forming mechanism of gaseous defect in Ti-48Al-2Cr-2Nb exhaust valves formed with permanent mold centrifugal casting method[J]. Journal of Materials Science & Technology,2001,17(5):569-571.
APA	W. B. Sheng,J. J. Guo,Y. Q. Su,H. S. Ding,&J. Jia.(2001).Forming mechanism of gaseous defect in Ti-48Al-2Cr-2Nb exhaust valves formed with permanent mold centrifugal casting method.Journal of Materials Science & Technology,17(5),569-571.
MLA	W. B. Sheng,et al."Forming mechanism of gaseous defect in Ti-48Al-2Cr-2Nb exhaust valves formed with permanent mold centrifugal casting method".Journal of Materials Science & Technology 17.5(2001):569-571.