It is proposed to use a new submersible nozzle with eccentric apertures in order to improve continuously-cast slab quality. Calculations show that up to 38% of the heat of steel overheating is removed in the upper part of the crystallizer. The number of equiaxed crystals increases by several factors with an increase in crystallization rate. Pilot plant approval of advanced continuous casting of low-carbon and low-alloy steels makes it possible to improve hot rolled metal strength and toughness. Forecasting low-carbon steel sheet ultimate strength and relative elongation is conducted using known experimental equations. Rolled steel quality is evaluated from slabs selected from eight melts. The slab sulfur content obtained using a nozzle with eccentric apertures is somewhat higher than in slabs cast through existing nozzles.
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Translated from Metallurg, Vol. 64, No. 7, pp. 50–54, July, 2020.
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Stulov, V.V., Aldunin, A.V. Improvement of Technology for Producing Rolled Sheet from Continuously Cast Steel Slabs. Part 1. Experimental Study of Casting Using a Pressure Submersible Nozzle. Metallurgist 64, 652–657 (2020). https://doi.org/10.1007/s11015-020-01041-5
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DOI: https://doi.org/10.1007/s11015-020-01041-5