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通过实验室坩埚实验,探讨了1 873 K下合金结构钢液、渣、夹杂物之间的热力学关系。首先通过预平衡实验,确定了钢-渣反应达到平衡所需时间为90 min。随后,进行了7炉平衡实验,探讨了平衡实验中钢液、夹杂物、渣三者间的关系。结果表明,1 873 K下,钢液与炉渣反应90 min后,钢中夹杂物主要为2μm左右的细小球形MgO.Al2O3尖晶石夹杂物。钢-渣反应平衡时,镁铝尖晶石夹杂物中log(XMgO/XAl2O3)分别与钢液中log[a[Mg]/(a2[Al].a[2O])]、渣中log(aMgO/aAl2O3)线性关系良好,斜率接近于1。
Through laboratory crucible experiment, the thermodynamic relationship between molten steel, slag and inclusions at 1 873 K was discussed. First of all, through the pre-equilibrium experiment, it is determined that the time required for the steel-slag reaction to reach equilibrium is 90 min. Subsequently, seven furnace balance experiments were carried out to discuss the relationship between molten steel, inclusions and slag in the balance experiment. The results show that at 18073 K, the inclusions in the steel are mainly spherical MgO.Al2O3 spinel inclusions with a size of about 2 μm after reacting with molten slag for 90 min. When the steel-slag reaction equilibrium, the log (aM [Mg] / (a2 [Al] .a [2O]) in the Mg-Al spinel inclusions and the log (XMgO / aMgO / aAl2O3) has a good linear relationship with a slope close to 1.