ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Inflow Behavior Observation of Molten Mold Powder between Mold and Solidified Shell by Continuous Casting Simulator Using Sn–Pb Alloy and Stearic Acid
Koichi TsutsumiJun-ichi OhtakeMitsutaka Hino
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2000 Volume 40 Issue 6 Pages 601-608

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Abstract

High productivity and high quality slab machine have been recently required in continuous casting process to lower the cost of steel production. It is important to know the inflow behavior of mold powder between mold and solidified shell to develop higher-speed casting. The purpose in this study is to make clear the mechanism of lubrication between mold and solidified shell. Sn–5mass%Pb alloy and stearic acid were used as substituted of liquid steel and molten mold powder in the experiment simulated continuous casting machine. Direct observation on inflow behavior of mold powder was made experimentally by a digital video camera. The friction force between mold and solidified shell was measured by a load cell which was set under the mold. Mold powder flowed into the aperture between mold and solidified shell during both positives trip time period and negative strip time period and the amount of powder consumption in positive strip time period was more than that in negative strip time period. The friction force between mold and solidified shell decreased when positive strip time ratio increased. When the modification rate or amplitude increased, or when frequency or casting speed decreased, the friction force decreased. These inclinations corresponded with those in the industrial continuous casting machine qualitatively.

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© The Iron and Steel Institute of Japan
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