Abstract：In order to study the influence of PMO on MnS inclusions in continuous casting billet of GCr15 bearing steel, the effect of PMO treatment on the composition and morphology of MnS inclusions in steel was analyzed by automatic scanning electron microscopy (Aspex Explorer), and element content in the solid-liquid front was measured by electron probe. The change of precipitation temperature of MnS after PMO treatment was calculated. The results show that PMO treatment can reduce the percentage of MnS inclusions larger than 8 μm at inner arc 1/4, center and outer arc 1/4 position. PMO has little effect on the change of Mn content. After treatment, S element in the solid-liquid front decreases by 60% and 36% at 50% and 70% of solidification, respectively. PMO treatment can reduce the precipitation temperature of MnS inclusions.
朱雷敏, 李莉娟, 罗坤坤, 李涛, 翟启杰. PMO对GCr15轴承钢连铸坯中MnS夹杂物的影响[J]. 中国冶金, 2021, 31(12): 32-38.
ZHU Lei-min, LI Li-juan, LUO Kun-kun, LI Tao, ZHAI Qi-jie. Effect of PMO on MnS inclusions in continuous casting billet of GCr15 bearing steel[J]. China Metallurgy, 2021, 31(12): 32-38.
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