摘要
针对某钢厂生产的DP590钢的工艺流程(高炉炼铁→BOF→LF精炼→连铸),分析了各工序以及铸坯中T[O]、T[N]和显微夹杂物的类型、来源、数量及组成。结果表明,稳态铸坯中T[O]=28×10~(-6),T[N]=29×10~(-6),显微夹杂的数量为8个/mm~2,显微夹杂类型主要有:CaS-Al_2O_3类夹杂、CaO-Al_2O_3类夹杂、Al_2O_3类夹杂、CaS类夹杂;粒度分别在1~10μm、4~20μm、1~4μm、1~10μm,含量分别为50%、20%、20%、10%。
The type, source, quantity and composition of T[O], T[N] and microinclusions in the billet of DP590 steel(blast furnace ironmaking, BOF, LF refining, continuous casting) were analyzed. The results show that the steady state slab of T[O]=25×10~(-6), T[N]=27×10~(-6), the number of micro-inclusions is 8 p/mm~(-2), the types of microscopic inclusions are as follows:CaS-Al_2O_3, CaO-Al_2O_3, Al_2O_3 and CaS. Particle sizes range from 1~10 μm, 4~20 μm, 1~4 μm, 1~10 μm, and the content are 50%, 20%, 20%, 10%, respectively.
引文
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