Metallurgy and Technology of Steel Castings

by

Jan Głownia

DOI: 10.2174/97816810857081170101
eISBN: 978-1-68108-570-8, 2017
ISBN: 978-1-68108-571-5





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Pouring Systems and Rising

- Pp. 276-293 (18)

Jan Głownia

Abstract

The quality of steel castings depends upon how the liquid metal enters into the mould and solidifies. The technology of pouring molten steel to the ladle and then to the mould must be controlled if no defect is to be obtained. These factors must be accounted for in designing the gating system, the feeding and risering of castings. Gating system ought to control a directional solidification of each part of the casting in such a way, that no wall thickness is isolated from the feeding during the freezing time. Position and size of the riser ensure elimination of shrinkage which takes place when a molten steel changes from the liquid to solid state.

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