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实验研究了镁质、氧化铝质和镁钙质三种中间包内衬涂料与钢水反应,考察了其对钢中T.O,T.N及Al,Ti,Si,Mn含量、夹杂物组成、数量和尺寸分布的影响,并分析了钢水在钢/涂层界面对涂层的渗透和侵蚀程度.结果表明,在1550℃下,相比于镁质涂料和氧化铝涂料,镁钙质涂料能对钢液T.O和成分有更好的控制,终点氧含量在8.5?10?5,对钢液的二次氧化很少,并有利于细小夹杂物的形成,其中?1?m夹杂物占98.13%;钢中首先是Al,Ti被氧化,之后是Si,Mn被氧化;氧化铝涂料被损坏的机理主要是冲刷脱落,镁质和镁钙质涂料的损坏则以渗透侵蚀为主.镁钙质涂料对钢液的二次污染小,有利于洁净钢的生产.
The three kinds of tundish lined with magnesia, alumina and magnesia were investigated for their reaction with molten steel. The contents of TO, TN, Al, Ti, Si and Mn, the composition, quantity and size of inclusions in steel Distribution and the influence of molten steel on the penetration and erosion of the coating at the steel / coating interface.The results show that magnesium-calcium coating can significantly improve the corrosion resistance of molten steel at 1550 ℃ compared with magnesium coating and alumina coating TO and components have better control, the end of the oxygen content of 8.5? 10? 5, the secondary oxidation of liquid steel is small, and is conducive to the formation of small inclusions, inclusions? 1? M accounted for 98.13%; steel In the first is Al, Ti is oxidized, followed by Si, Mn is oxidized; alumina coating is the main erosion mechanism is scour off, magnesium and magnesium calcareous coating damage is dominated by penetration erosion. Secondary pollution of molten steel is small, is conducive to clean steel production.