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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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|
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