【摘要】 基于渗透理论建立了气体保护电渣重熔过程渣-钢间氧传递的动力学模型,并在50 kg电渣炉进行模具钢S136（/%:0.39C、0.26Si、0.43Mn、0.020P、0.018S、13.37Cr、0.21Mo、0.34V）的重熔实验,得出渣中FeO含量-0～2.0%（FeO）,电极端部钢液中原始氧含量-0～0.010 0%[O],自耗电极半径-40～300 mm和重熔速率-（0.5～5.0）×10^-6 m³/s对熔渣和钢液间传氧速率的影响。结果表明,熔渣中FeO含量-（FeO）存在一个临界值,（FeO）小于此临界值时,氧的传递过程为电极端部钢液向渣中传递;反之,氧的传递过程为渣中FeO向电极端部钢液内传递。随自耗电极半径的增加,钢-渣间传氧速率减小;随着重熔速率和钢液中原始氧含量增加,钢-渣间传氧速率增加。更多还原

【Abstract】 Based on the penetration theory,a kinetic model for oxygen transfer between molten slag and liquid steel during protective gas electroslag remelting process is established,and remelting test of die steel S136（/%:0.39C, 0.26Si,0.43Mn,0.020P,0.018S,13.37Cr,0.21Mo,0.34V） by a 50 kg electroslag remelting unit is carried out to get the effect of FeO content in slag-0～2.0%（FeO）,original oxygen content in liquid steel at the electrode tip- 0～0.0100%[O],radius of electrode-40～300 mm and remelting rate-（0.5～5.0）×10^-6m³/s on transfer rate of oxygen between molten slag and liquid steel.The results show that there is a critical value of（FeO）,as FeO content in slag is lower than the value,the oxygen transfer process is from liquid steel at electrode tip to molten slag,whereas as FeO content is higher than that value,the oxygen transfer process is from molten slag to liquid steel at electrode tip;with increasing the radius of electrode,the liquid steel-molten slag oxygen transfer rate decreases,and with increasing the melting rate and the initial oxygen content in liquid steel,the liquid steel-molten slag oxygen transfer rate increases.更多还原