Method for reducing cold-rolling dual phase steel base material banded structure and flat roll defects

• Main Authors: LIU QING, SUN HONGLIANG, TAN WENZHEN, LI YAQIN, WU GUANHUA, MA GUANGZONG, LIU JING, MA DEGANG, LI BO
• Format: Patent
• Language: Chinese; English
• Published: 17.01.2020
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for reducing cold-rolling dual phase steel base material banded structure and flat roll defects. The method comprises the steps of heating a slab, hot rolling, laminarcooling and coiling. According to the method for reducing the cold-rolling dual phase steel base material banded structure and flat roll defects provided by the invention, through the reasonable formulation of a slab heating schedule, finish rolling, coiling temperature and a laminar cooling process, the phase change proportion of a hot rolled steel band in a laminar cooling section is improved,the cold-rolling dual phase steel base material flat roll defect is improved, the cost increase caused by the handling of the flat roll problem is reduced, meanwhile, the banded structure defect can be improved, the banded structure is reduced to be below 1.0 grade, and the influence on a cold-rolling product performance due to hot-rolling structure defect hereditation is avoided. 本发明公开了一种减轻冷轧双相钢基料带状组织及扁卷缺陷的方法，所述方法包括板坯加热、热