Abstract: The 6.2 t 200 mm x 1250 mm slab ingot of 2205 dual-phase stainless steel (/% : 0.015-0.016C, 0.15-0.16Si, 1.35-1.39Mn, 0.005-0.006S, 0.023-0.024P, 22.78-22.95Cr, 5.40Ni, 3.15-3.17Mo, 0.193-0.194N) is produced by a 20 t duplex electrode series drawing ingot elector-slag remelting unit. With the process measures including using 50CaF₂-19Al₂O₃-19CaO-6MgO-6SiO₂ liquid slag series, controlling ingot drawing speed 12 mm/min and electrode melting rate 1100-1200 kg/h, the surface quality of slag ingot is better, the surface grinding amount is ≤3 mm to meet the requirement for rolling.

Key words: 2205 Dual-Phase Stainless Steel, 200 mm x 1250 mm Electro-Slag Remelting Slab Ingot, Practice of Process

摘要： 2205双相不锈钢6.2 t 200 mm×1250 mm扁锭（/%:0.015~0.016C，0.15~0.16Si，1.35~1.39Mn，0,005~0.006S，0.023~0.024P，22:78~22.95Cr，5.40Ni,3.15~3.17Mo，0.193~0.194N）由20 t双极串联抽锭电渣重熔炉生产。通过采用50CaF₂-19Al₂O₃-19CaO-6MgO-6SiO₂液态熔渣,控制抽锭速度12 mm/min,电极熔化速度1100~1200 kg/h等工艺措施,扁锭表面质量良好,表面修磨量≤3 mm,满足轧制要求。

关键词: 2205双相不锈钢, 200 mm x 1250 mm电渣重熔扁锭, 工艺实践