Zircon Sand--a Viable Alternative Moulding System for Titanium Castings

Saha, RL and Mukherji, D and Misra, RDK and Jacob, KT and Nandy, TK (1991) Zircon Sand--a Viable Alternative Moulding System for Titanium Castings. In: Transactions of the Indian Institute of Metals, 44 (1). pp. 53-61.

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Abstract

The experimental observations of casting titanium in sodium silicate bonded zircon sand mould are presented in this paper. Metal-mould reactions, in general, involved dissolution of oxides in liquid titanium resulting in contamination of the casting. Minimal metal-mould reactions occurred when titanium was cast in zircon sand mould containing about 7.5 wt% of ZrO2. It has been further shown that the metal-mould reaction is considerably reduced if moulds were fired at high temperatures (> 1273K). This ensured elimination of moisture from the mould and also resulted in some beneficial changes in the mould chemistry. The reduction in metal-mould reaction is reflected in the decrease in oxygen and hydrogen contamination and decrease in hardness. Thus microhardness profile and oxygen analysis seems to provide a good index for evaluation of severity of metal-mould reaction. The method has been demonstrated to be satisfactory for casting titanium components.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to Indian Institute of Metals.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	09 Dec 2011 09:39
Last Modified:	09 Dec 2011 09:39
URI:	http://eprints.iisc.ernet.in/id/eprint/42670

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