Ultra-low carbon steel with high filament drawing capacity and production method of ultra-low carbon steel

• Main Authors: ZHANG YUMING, HUO LIGUO, TIAN XINZHONG, LYU HAOJIE, DONG QING, LI YASHUO, FAN YAPENG, LI YONGCHAO, WANG DONGCHEN, GONG YANJIE, LI MINRUI, LEE KAH YONG, AN JINGTAO
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; PERFORMING OPERATIONS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses ultra-low carbon steel with high filament drawing capacity and a production method of the ultra-low carbon steel. The ultra-low carbon steel comprises the following chemical components in percentage by mass: less than or equal to 0.010% of C, less than or equal to 0.010% of Si, less than or equal to 0.04% of Mn, less than or equal to 0.015% of P, less than or equal to 0.0040% of S, less than or equal to 0.0010% of Al, 0.0180-0.0300% of total oxygen and the balance of Fe and inevitable impurities. According to the ultra-low carbon steel, the total oxygen content in steel is controlled, a large amount of FeO is generated in the steel, FeO is combined with high-melting-point oxides of Si, Mn and Al to form low-melting-point eutecticum, inclusions in the steel are sphere-like inclusions, and therefore the thin wire drawing capacity of the steel is effectively improved; by controlling the S content, it is avoided that low-melting-point sulfide is generated to affect the steel surface qualit