两种渣系电渣重熔冶炼C-HRA-3 镍基合金锭冶金质量试验探究
Exploration of Metallurgical Quality Test for C-HRA-3 Nickel Base Alloy Ingot Smelted by Two Slag System Through Electroslag Remelting
本文利用实验室 10 kg级电渣重熔炉研究了两种六元渣系电渣重熔冶炼C-HRA-3合金冶金质量的差异。结果表明:相比于 60%CaF2-20%Al2O3-10%CaO-10%MgO(以下简称 6211 渣系)基础渣系,利用新型 50.4%CaF2-26.1%Al2O3-19.5%CaO-3%MgO基础渣系(以下简称新型渣系)电渣重熔冶炼C-HRA-3 合金表面质量更优,凹坑数量少且深度浅;新型渣系冶炼的电渣锭柱状晶生长方向与中心线夹角更小,熔池深度更大;两种含相同比例TiO2 和ZrO2 组元渣系冶炼的电渣锭各位置处Al、Ti、Zr、Si、B元素含量均可控制在C-HRA-3 合金目标含量范围内;新型渣系电渣锭中夹杂物数量更少,四个不同高度处氧化物夹杂数量比例均更低,电渣锭中液相中新生夹杂物数量极少,均主要来源于原电极内部的夹杂物。
In this paper,the difference in metallurgical quality of C-HRA-3 alloy smelting using two kinds of slag system was investigated by a 10 kg electroslag remelting furnace.The results show that the alloy electroslag ingot smelting by a new-type 50.4%CaF2-26.1%Al2O3-19.5%CaO-3%MgO basic slag system has better surface quality,where there are fewer pits and thier depth is shallower,compared to 60%CaF2-20%Al2O3-10%CaO-10%MgO basic slag system.The columnar crystal growth direction of the electroslag ingot,smelting by new-type slag system,has a smaller angle with the centerline,and the depth of the molten pool is greater.The content of Al,Ti,Zr,Si,and B at various positions of two electroslag ingots smelting with the same proportion of TiO2 and ZrO2 components can be controlled within the target content range of C-HRA-3 alloy.There are fewer inclusions in the electroslag ingot smelting by new-type slag system,and the proportion of oxide inclusions at four different ingot heights is lower.The number of inclusions formed in the liquid phase is very small,and they are mainly the inclusions inside the original
李龙飞;林腾昌;张曦东;
钢铁研究总院有限公司冶金工艺研究所,北京 100081;钢铁研究总院有限公司冶金工艺研究所,北京 100081;钢铁研究总院有限公司冶金工艺研究所,北京 100081;
electroslag remelting slag system refining time C-HRA-3 alloy metallurgical quality
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