广富集团采用单渣快速脱磷,出钢[P]≤0.010%,终点碳0.035%~0.05%;LF精炼控制渣系和氧含量;连铸全程保护浇注、塞棒自动控制以及结晶器电磁搅拌;控轧控冷,成功开发生产了ER50-6焊丝用钢.产品检验表明,钢的化学成分均匀、稳定,氧含量(15~35)×10-6,铸坯组织致密,中心疏松≤1.0级,热轧盘条抗拉强度500~550 MPa,断后伸长率≥25%.%Adopting single slag fast dephosphorization for tapping[P]≤0.010%and 0.035%-0.05%aim carbon content in converter operation, controlling refining slag system and the oxygen content in LF, using full protection pouring, stopper automatic control and mould electromagnetic stirring in casting and control rolling and control cooling in rolling, Guangfu Group developed and produced ER50-6 welding wire steel. The Product inspection showed that the chemical composition is stable and uniform. The oxygen content in the steel is (15-35)×10-6. Casting billet microstructure compacts;The central porosity is≤1.0 grade. The tensile strength of the hot rolled wire rod is 500-550 MPa and the elongation is≥25%.
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