On the Formation of Sound Solid Skin of Low Carbon Rimming Steel Ingot
1968 Volume 54 Issue 4 Pages 393-401
Details
1968 Volume 54 Issue 4 Pages 393-401
The ingotmaking process to obtain low carbon rimming steel ingot with sound solid skin were studied. The results obtained are as follows;
1. It is possible to prevent the formation of skin holes in solid skin by rimming action during teeming. The addition of shot aluminum during teeming is effective to increase therimming action. It is considered that aluminum prevents the growth of bubbles which are brought into molten steel bulk in the mold by teeming stream, and intensifies the circulating flow of liquidsteel along the mold wall.
2. Thickness of solid skin is influenced by both the teeming rate and the range free from lenticular blowhole of ingot. The latter of the teemed steel is determined mainly by manganese content in the range of 0.06-0.08% carbon. Manganese has little effect on the deoxidation of teeming steel, but it is considered that at the solidifying front manganese influences the deoxidation and CO gas evolution.
