Filling system for investment cast Ni-base turbine blades

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	Filling system for investment cast Ni-base turbine blades
	D. Z. Li; J. Campbell; Y. Y. Li
	2004
发表期刊	Journal of Materials Processing Technology
ISSN	0924-0136
卷号	148 期号:3 页码:310-316
摘要	In investment foundries, it is usual to pay relatively little attention to the design of the filling system of a casting. Vacuum-cast turbine blades represent a typical case, where the mould filling process is poorly controlled, the mould cavities themselves often being top-filled. The consequential surface turbulence causes the entrapment of oxide film on the liquid surface, despite the use of vacuum melting and pouring. In this work, bottom filling principles were used to minimize turbulence. X-ray radiographic video was used to observe and compare the filling of both bottom- and top-filled moulds. Ni-based alloy investment-cast blades melted and cast in vacuum clearly validated the bottom filling design. Compared to conventional top filling in vacuum, dye penetrant indications were reduced by approximately a factor of 10, and hot cracking appeared to be eliminated. (C) 2004 Elsevier B.V. All rights reserved.
部门归属	inst met sci & technol, chinese acad sci, shenyang 110016, peoples r china. univ birmingham, irc mat, birmingham b15 2tt, w midlands, england.;li, dz (reprint author), inst met sci & technol, chinese acad sci, shenyang 110016, peoples r china;dzli@imr.ac.cn
关键词	Investment Casting Ni-base Turbine Blade Defects 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/321006/35403
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. Z. Li,J. Campbell,Y. Y. Li. Filling system for investment cast Ni-base turbine blades[J]. Journal of Materials Processing Technology,2004,148(3):310-316.
APA	D. Z. Li,J. Campbell,&Y. Y. Li.(2004).Filling system for investment cast Ni-base turbine blades.Journal of Materials Processing Technology,148(3),310-316.
MLA	D. Z. Li,et al."Filling system for investment cast Ni-base turbine blades".Journal of Materials Processing Technology 148.3(2004):310-316.