Vol.10, No2, 2010, pp.125-128
UDC  621.746.6.019 : 669

CALCULATING THE DEPTH OF THE INNER CAVITY RESULTING FROM SHRINKAGE OF MOLTEN METAL

Rositsa Gavrilova1, Valentin Manolov2

1) University of Chemical Technology and Metallurgy, Sofia

2) Institute of Metal Science “Academy A. Balevski”-BAS

Abstract

In the present work an evaluation is made of the applied technological improvements in the process of metal crystallization. The risers (dead heads) of metal ingots weighing 10 kg, produced on a Layboud Heraeus installation, have been investigated. The defects occurring during crystallization are determined. Calculations are performed including the depth of the cavity in the dead head, the amount of hard metal in the ingots and dead heads, and the average radius rm of the free surface S of the liquid metal in the dead heads, depending on the time of crystallization.

Keywords: molten metal, crystallization, riser, defects, calculation

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