Effect of calcium treatment on characteristics of nonmetallic #br#
inclusions in steel containing high Al
WANG Linzhu1,LI Junqi1,YANG Shufeng2,CHEN Chaoyi1,JIN Huixin1
(1. College of Materials and Metallurgy, Guizhou University, Guiyang 550025, Guizhou, China;
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)
Abstract：The morphology and the composition of inclusion were observed by SEMEDS. The particle size distribution in threedimensional, the intersurface distance and the distribution of inclusions were analyzed by an image software based on the stereology method. The results indicate that there were mainly Al2O3CaO(CaS)complex inclusions and AlN inclusions in the high Al steel after the calcium treatment. As the mass percent of Ca increasing from 0.0004% to 0.0024%, the average size of inclusions decreased from 2.5 to 1.8μm, the number density of inclusions increased by about one time, and the average intersurface of inclusions decreased from 95 to 72μm. Besides, the transformation process of inclusion composition during the cooling process was studied by FactSage thermodynamic calculation and the calculated results were in agreement with the experimental results. The relationship between the nucleus size and the characteristics was analyzed based on the calculation of inclusion nucleation. The factors affecting the inclusion distribution in the steel containing high Al were also discussed.
王林珠, 李军旗, 杨树峰, 陈朝轶, 金会心. 高铝钢中钙处理对非金属夹杂物特征的影响[J]. 钢铁, 2019, 54(11): 27-32.
WANG Linzhu1,LI Junqi1,YANG Shufeng2,CHEN Chaoyi1,JIN Huixin1. Effect of calcium treatment on characteristics of nonmetallic #br#
inclusions in steel containing high Al. Iron and Steel, 2019, 54(11): 27-32.
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2019, Vol. 54 
