摘要
采用SEM和金相显微镜系统地研究了鞍钢2150 ASP工艺生产的高品质管线钢中非金属夹杂物在冶炼过程中的演变规律。结果表明,钢中非金属夹杂物的数量与全氧量的变化趋势一致;精炼初期钢中主要是含MnO的复合夹杂物,LF精炼后期直到铸坯,钢中的夹杂物主要是以Al2O3-CaO(MgO)为核心,周围为CaS类的复合夹杂物;铸坯中的夹杂物尺寸较小,平均为3.1个/mm2;该工艺路线生产的管线钢的洁净度能够满足用户的需求。
By means of SEM and metallographic microscope,the evolution pattern of non-metallic inclusions in high quality pipeline steel during smelting process produced by 2150 ASP in Angang is systematically studied.The results show that the trend of variation in quantity of non-metallic inclusions is the same as that of T[O] in steel,and main inclusions include compound inclusions such as MnO in molten steel at early stage of refining.However,from the end of refining by LF to the start of casting,main inclusions changed into Al2O3-CaO（MgO）together with less CaS.And thus the size of inclusions in a strand is relatively small with the number of 3.1 pieces/mm2 on the average.The cleanliness of pipeline steels produced by 2150 ASP can meet users＇ requirements.
出处
《鞍钢技术》
CAS
2011年第1期24-26,38,共4页
Angang Technology
关键词
ASP
管线钢
非金属夹杂物
ASP
pipeline steel
non-metallic inclusion
