COMPARISON OF CALCIUM INCLUSION SHAPE CONTROL BETWEEN LADLE TREATMENTS AND ESR IN STEELS.


Por: Mitchell A., Reyes-Carmona F.

Publicada: 1 ene 1986
Resumen:
Calcium is added to liquid steels in ladle treatment processes for a number of reasons, including oxide/sulphide inclusion shape control in the solidified steel. Previous studies have established the range of Ca/Al/O/S ratios needed to accomplish this objective and hence have defined the permissible slag compositions and/or Al and Ca additions necessary to attain this objective. In steels processed by ESR, the oxygen and sulphur contents are low, but nonetheless it is desirable to control the oxide/sulphide shape with calcium. Authors conclude that steels made by injection techniques or by slag processing, or by ESR can all be made with the same level of calcium shape control, provided that the slag a//C//a//O/a//A//l//2//0//3 ratio, oxygen and sulphur potential and deoxidation state are equivalent. Practical results with the steel grade SAE 4340 are used to illustrate these results.
ISSN: 04021215
Editorial
ASME, New York, NY, USA
Tipo de documento: Conference Paper
Volumen: Número:
Páginas: 331-333

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