Abstract: The electrodes of tested Incoloy825 alloy (/%: 0.01C, 0. 21Si, 0.41Mn, 0.007S, 0.019P, 22.33Cr, 39.08Ni, 3.04Mo, 2.14Cu, 1.17Ti, 0.17Al) are melted by 3t medium frequency induction furnace + 3t AOD, and the 280mmx325mm withdrawing blooms (/%: 0.01C, 0.21~0.23Si, 0.40Mn, 0.005S, 0.023~0.024P, 22.48~22.50Cr, 39.10~39.13Ni, 3.05~3.07Mo, 2.14~2.15Cu, 1.00~ 1.10Ti, 0.15~0.18Al) are remelted by ESR process. The test results show that during ESR bloom withdrawing process of Incoloy825 alloy, due to Ti burning loss the TiO₂ content in slag increases continuously and the viscosity of slag also uninterrupted increases led to difficult separation of slag and steel. By improving ingredient of slag for withdrawing bloom ESR, using (/%) 57CaF₂, 15CaO, 5MgO, 15Al₂O₃, 5SiO₂, 3TiO₂ slag series and controlling electrode melting rate 680kg/h and adding aluminium shot 0.43 kg/t in ESR process to control Ti burning loss, the surface quality of casting bloom of Incoloy825 alloy improves obviously.

摘要： 试验了Incoloy825合金电极（/%:0.01C,0.21Si,0.41Mn,0.007S,0.019P,22.33Cr,39.08Ni,3.04Mo,2.14Cu,1.17Ti,0.17Al）由3t中频炉+3tAOD冶炼,并经抽锭电渣重熔成280mm×325 mm坯（/%:0.01C,0.21~0.23Si,0.40Mn,0.005S,0.023~0.024P,22.48~22.50Cr，39.10~39.13Ni,3.05~3.07Mo,2.14~2.15Cu,1.00~1.10Ti,0.15~0.18Al）。试验表明,Incoloy825合金方坯抽锭电渣重熔过程中,由于Ti烧损,渣中TiO₂含量不断增加,熔渣的粘度也不断上升,导致钢渣不易分离。通过改进抽锭电渣重熔渣系配比,采用（/%）57CaF_2，15CaO，5MgO,15Al₂O₃,5SiO₂,3TiO₂渣系以及控制电极熔化速度680kg/h,重熔过程加0.43kg/t铝粒以控制Ti烧损,使Incoloy825合金铸坯表面质量明显改善。

关键词: 耐蚀合金, Incoloy825, 280mmx325mm坯, 抽锭电渣重熔, 表面质量