关键词: 304奥氏体不锈钢带, 亮斑缺陷, 层流冷却, 水质, 过酸洗

Abstract: The production process for 2,5 ~8. 0 mm strip of 304 austenite stainless steel (/%: ≤0. 08C, 18. 00 ~ 20.00Cr, 8. 00 ~ 10.50Ni) is 70 t EAF-70 t bottom blowing GOR converter-LF-slab casting-hot continuous rolling-solid solution treatment-pickling. Based on analysis and examination on bright spots of hot rolled and pickling strip including roughness, inclusions and structure, and test of effect of laminar cooling water quality in situ on strip bright spots formation, it is defined that the contaminated oil and suspending particles in laminar flow cooling water deposit on surface of strip, after solid-solution treatment and pickling the bright spots form on surface of strip. With strict controlling the laminar cooling water quality and strengthening the management of relative laminar flow cooling equipment during facility maintenance, as oil contamination of cooling water is less than 0.5 mg/L and suspending particles is less than 7 mg/L, it is available to avoid the formation of bright spot defect of 304 stainless steel strip and obviously enhance the quality of products.