利用实验室渣-钢平衡试验研究了高碱度精炼渣对GCr15轴承钢中w(T[O])和夹杂物的影响.结合试验结果和热力学分析,探讨了钢中w(T[O])、夹杂物尺寸分布和粒径大小的变化规律,以及氧化物夹杂的转变过程.研究结果表明,碱度为6时,精炼渣(59.4％CaO-24.8％A12O3-9.8％SiO2-6％MgO)可将钢中w(T[o])控制在0.000 6％以内,氧化物夹杂平均尺寸最小为2.26 μm.随着钢中w([Ca])和w([Mg])的增加,钢中氧化物夹杂转变过程为Al2O3→MgO· Al2O3→MgO→CaO-Al2O3-MgO复合夹杂物(核心为MgO,外围包裹着CaO-Al2O3).渣-钢反应前期钢中以MgO·Al2O3为主,后期以MgO和CaO-Al2O3-MgO复合夹杂物为主.氧化物夹杂转变的试验结果与热力学分析结果相一致,大多数氧化物夹杂尺寸小于5μm.
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