Non-oriented electrical steel plate with excellent magnetic performance and manufacturing method thereof

• Main Authors: LYU XUEJUN, HAO YUNWEI, ZHANG FENG, ZONG ZHENYU, SUN YEZHONG, XIE SHISHU
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2020
• 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; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a non-oriented electrical steel plate with excellent magnetic performance. The non-oriented electrical steel plate comprises the following chemical elements of, by mass percent, greater than 0% and less than or equal to 0.004% of C, 0.1%-1.0% of Si, 0.4%-1.0% of Mn, 0.005%-0.015% of S, less than or equal to 0.4% of Al, 0.001%-0.008% of O, greater than 0% and less than or equal to 0.003% of N and the balance Fe and other inevitable impurities. The invention further discloses a manufacturing method of the non-oriented electrical steel plate with the excellent magnetic performance. The method comprises the following steps of (1) carrying out converter smelting; (2) carrying out RH refining, wherein one or more times of deoxygenation is carried out after the decarburization of RH refining is finished, and the Si element is adopted for final deoxidation; (3) carrying out continuous casting; (4) carrying out hot rolling; (5) carrying out pickling and continuous rolling; and (6) carrying out