DEVELOPMENT OF VARIABLE THICKNESS LONGITUDINAL PROFILED ROLLED PLATE AT GERDAU OURO BRANCO
Afrânio Márcio Costa, Antônio Augusto Gorni, Emanuelle Garcia Reis, Jose Herbert Dolabela da Silveira
Gerdau Ouro Branco´s plate mill started operation in 2016 with high-level technology and production capacity of 1.2 million tons per year. The plant has the capacity to produce different thicknesses in a single plate, therefore is able to supply special requirements of sectors such as building structures, bridges, shipbuilding and mechanical applications. This paper presents the first results obtained in this innovative product in South America market. Some slabs of EN10025-2 S355JR+AR steel were rolled and were evaluated for dimensional tolerances, mechanical properties uniformity, grain size, surface and internal qualities. In addition, a correlation was observed between slab and plate thickness reduction and internal plate quality. The results show that this technology can be used with adequate performance for steel grades in the current market.
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