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采用加入示踪剂、全流程系统取样与实验室综合分析相结合的方法,对82B钢生产过程中各工序钢中T.O和N含量、显微夹杂物和大型夹杂物数量和粒径分布以及成分类型进行了系统研究。结果表明:LF精炼后钢中w(T.O)和显微夹杂物数量显著下降,分别降低62.06%和43.57%;铸坯中w(T.O)和显微夹杂物数量的平均值分别为28.42×10-6和17.78个/mm2,铸坯中小于4μm的显微夹杂物数量占87.21%;LF精炼时钢包包衬侵蚀严重,软吹前的精炼过程和中间包浇铸时钢液因吸气造成的二次氧化较严重;中间包内钢液浇铸不稳定,存在严重的卷渣现象。
Adopting the method of adding tracers, the whole process system sampling and laboratory comprehensive analysis, the content of TO and N, the number and size distribution of micro-inclusions and large inclusions in the steel in the production process of 82B steel, Type of systematic research. The results show that the quantities of w (TO) and micro-inclusions in steel after LF refining decrease significantly by 62.06% and 43.57%, respectively. The average values of w (TO) and micro-inclusions in slab are respectively 28.42 × 10 -6 and 17.78 / mm2, respectively. The number of microscopic inclusions less than 4μm accounted for 87.21% in the slab. The corrosion of the ladle lining during LF refining was serious. The refining process before soft blowing and the molten steel caused by inhalation during the tundish casting Secondary oxidation is more serious; tundish casting instability, there is a serious phenomenon of entangled slag.