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先将C-Mn钢在1600℃下钛脱氧15min,然后再加入MgSi合金脱氧不同时间,最后对脱氧后试样进行淬火冷却.采用ASPEX Explorer夹杂物电镜/能谱自动分析仪研究了微镁脱氧时间对钛脱氧钢夹杂物尺寸分布、成分及形貌的影响.随着微镁脱氧时间的增加,夹杂物粒子数量逐渐减少,尺寸有所增加,夹杂物粒子尺寸分布符合正态分布;富MgAl2O4及TiOx复合夹杂物聚合上浮,夹杂物类型由富MgAl2O4、MgO和TiOx转变为富MgAl2O4和MgO复合夹杂物.另外,减少镁脱氧时间有益于提高单位体积夹杂物粒子数量以及获得细小的富MgAl2O4、MgO及TiOx夹杂物粒子铸态试样.
Firstly, the C-Mn steel was deoxidized for 15min at 1600 ℃, then the MgSi alloy was deoxidized for different time, and finally the deoxidized samples were quenched and cooled.The micro-Mg deoxidation Time on the size distribution, composition and morphology of titanium deoxidized steel inclusions.With the increase of micro-deoxidation time, the number of inclusions decreased, the size increased, the particle size distribution of inclusions in line with the normal distribution; rich MgAl2O4 And TiOx composite inclusions, the types of inclusions are changed from MgAl2O4, MgO and TiOx into MgAl2O4- and MgO-rich inclusions.In addition, the reduction of magnesium deoxidation time is beneficial to increase the number of inclusions per unit volume and to obtain fine MgAl2O4- MgO and TiOx inclusion particles as-cast samples.