초록

A process for manufacturing carbon-steel strip having a thickness of less than or equal to 10 mm directly from liquid steel, by casting said liquid steel between the lateral surfaces, made of copper or copper alloy, of two internally cooled rotating horizontal rolls.

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1. A process for manufacturing carbon steel strip having a thickness of less than or equal to 10 mm directly from liquid steel comprising the steps of:providing a liquid steel having a composition comprising, in percentages by weight based on total weight: carbon.ltoreq.0.5%, manganese from 0.2 to 2

1. A process for manufacturing carbon steel strip having a thickness of less than or equal to 10 mm directly from liquid steel comprising the steps of:providing a liquid steel having a composition comprising, in percentages by weight based on total weight: carbon.ltoreq.0.5%, manganese from 0.2 to 2%, silicon.ltoreq.2%, the %Mn/%Si ratio being between 3 and 16, optionally aluminum+titanium+zirconium.ltoreq.0. 10%, iron and usual impurities; casting said liquid steel between lateral surfaces of copper and copper alloy of two internally coated rotating horizontal rolls; said lateral surfaces of said rolls have contiguous dimples giving said surfaces a roughness Rz of between 40 and 200 .mu.m and a roughness Ra of between 10 and 40 .mu.m; and the atmosphere surrounding the meniscus of said liquid steel present between said rolls contains between 40 and 100% nitrogen, any balance being an inert gas insoluble in said liquid steel or of a mixture of such inert gases.