含钛铁素体不锈钢中氧化钛夹杂物控制的研究

来源期刊：上海金属2010年第3期

论文作者：张贺佳 陈伟庆 郑宏光

文章页码：20 - 23

关键词：含钛不锈钢； 氧化钛； 氧化铝； 热力学计算； 渣氧化性

Key words：Stainless Steel Containing Ti； TiO₂； Al₂O₃； Thermodynamic Calculation； Slag Oxidizability

摘    要：采用碳管炉冶炼含钛铁素体不锈钢,采用光学显微镜和扫描电镜分析试样中夹杂物的数量和类型,研究钢包渣氧化性和钢中[Al]含量对钢中TiO₂夹杂物形成的影响,同时进行了渣中FeO与[Al]、[Ti]反应生成TiO₂和Al₂O₃的热力学计算。计算和实验结果均表明,控制钢液中[Al]含量在平衡曲线(1)之上,同时尽可能降低钢包渣的氧化性,能够有效抑制钢中TiO₂夹杂物的生成。

Abstract: The type and amount of inclusions in the ferritic stainless steel containing Ti smelted in carbon tube furnace were analyzed by optical microscope and scanning electron microscope (SEM).The effects of ladle slag oxidizability and [Al] content on the formation of titania inclusions in steel were investigated.The thermodynamic calculation was performed for the formation of TiO₂ and A1₂O₃ inclusions by the reactions between FeO in the slag and [Al],[Ti] in steel.Both the computation results and experiments data showed that the formation of titania inclusions were effectively depressed by controlling the appropriate content of aluminium in steel above the equilibrium curve(1) and reducing the ladle slag oxidizability as low as possible.