Analysis and research on the three-dimensional full-size morphology of non-metallic inclusions in Si-Mn killed steel
SUN Li-gen1,2,ZHANG Qi1,ZHU Li-guang1,2,REN Ying-qiang1,FAN Sai1
1. College of Metallurgy and Energy, North China University of Science and Technology,Tangshan 063009, China; #br#
2.Hebei High Quality Steel Continuous Casting Engineering and Technology Research Center,Tangshan 063009, China
Abstract：Based on the composition and related chemical characteristics of non-metallic inclusions in Si-Mn killed steel, the electrolysis apparatus for the three-dimensional original morphology analysis of inclusions was established using organic electrolyte as core and DC stabilized power supply as auxiliary. Moreover, the basic morphology and composition of internal inclusions were systematically analyzed and investigated by stereoscopic microscope and scanning electron microscope using Q235 steel as a representative example. The results indicated that the true three-dimensional morphology of inclusions in Si-Mn killed steel could be effectively obtained by the experimental method. The optimal conditions for the full-size electrolysis of Si-Mn killed steel were listed as follows: the bath solution was the buffer solution containing bromine water and ethanol with volume ratio of 1∶1, the electrolyte was 200 g/L NaCl solution (the volume fraction of NaCl solution in electrolyte was 10%), the electrolytic current was controlled in range of 0.10-0.15 A, and the electrolysis time was 20-40 min. Meanwhile, the analytical results of Q235 steel showed that the inclusion type was SiO2-Al2O3-MnO-TixOy complex inclusion, which mainly included transparent and non-transparent spherical inclusions. In addition, there were also few cubic, bar-shaped, ellipsoidal and irregular inclusions. The size of some inclusions exceeded 200 μm
孙立根,张 奇,朱立光,任英强,樊 赛. 硅锰镇静钢中非金属夹杂物三维全尺寸形貌分析研究[J]. 冶金分析, 2015, 35(11): 1-7.
SUN Li-gen ,ZHANG Qi ,ZHU Li-guang ,REN Ying-qiang ,FAN Sai. Analysis and research on the three-dimensional full-size morphology of non-metallic inclusions in Si-Mn killed steel. , 2015, 35(11): 1-7.
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