Quality Advantage & Progress in DSC Hot-Rolled-Coil

by Chieh-Hsiang Tseng

Publisher - Dragon Steel Corporation, Taichung, Taiwan

Category - Engineering & IT

Since 2010.04 the 1st Hot-Roll-Coil output, Dragon Steel Corporation (DSC) produced HRC more than 20 million tons till now. In order to achieve good surface quality, precise thickness and width, and uniform microstructure of HRC, DSC has developed proper method to manage and maintain product quality. In steelmaking, internal quality and sub-surface sliver of slab are related to refining procedure and continuous casting metallurgy. In hot rolling, (1)Low temperature drop and applying edge heater can get rid of mixing grains problem. (2)Technique of Pair-Cross rolling is beneficial for thickness and profile control, (3)Tension leveler/shape-meter in finishing line maintain stable and excellent flatness performance. In order to meet further demands and advanced requirements, DSC implemented Slab Sizing Press in 2014.12 to increase incoming slab flexibility and output coil weight. Besides, we also establish manufacture technique of thinner strip within high-strength (70kg/1.6*1200mm), ES steel without edge seams and Cr-Mo steel without “tiger mark”. To enhance competitiveness, we still need to keep advantage of production equipment to make good quality product, not only meet customer’s demand but beyond that.

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