摘要
为了对重轨钢脱氧及夹杂物控制进行热力学研究,结合实际生产以及FactSage热力学软件,分析了U75V重轨钢复合脱氧及相应工艺条件下夹杂物的生成情况。研究结果表明,重轨钢生产过程中,随着脱氧反应的进行以及脱氧平衡的移动,钢中溶解氧含量不断降低,夹杂物成分由SiO2-MnO向SiO2-MnO-Al2O3及CaO-SiO2-Al2O3-MgO不断转变,最终夹杂物组成为CaO-SiO2-Al2O3-MgO;纯铁液的脱氧热力学和实际钢液存在较大差距。因此,不能采用纯铁液的脱氧热力学指导实际生产,且目前实际钢液的脱氧热力学没有系统化,需要进行深入研究;此外,考虑重轨钢脱氧的同时,必须结合夹杂物控制,须在保证脱氧效果的同时,不影响夹杂物的去除效率且防止生成大尺寸夹杂物。
In order to study the thermodynamics on deoxidization and the inclusion control of heavy rail steel,Fact Sage thermodynamic software was used,combining with the actual production,to analyze the complex deoxidization of U75 V heavy rail steel and the formation of inclusions under corresponding conditions. The results show that in the production process of heavy rail steel,the dissolved oxygen content in steel decreased continuously with the deoxidization reaction and the movement of deoxidization equilibrium,and the composition of inclusions transformed from SiO2-MnO to SiO2-MnO-Al2O3 and CaO-SiO2-Al2O3-MgO constantly,the final inclusion was composed of CaO-SiO2-Al2O3-MgO. It was unreasonable to guide the actual production using the thermodynamics of pure iron since there was a large deviation between pure iron and commercial steel on the deoxidization thermodynamics,moreover,the deoxidization thermodynamics for actual molten steel was not yet systematic,and further research was needed. Inclusion controlling should also be considered during the deoxidization process,and it was necessary to ensure the deoxidization effect without affecting the removal efficiency of inclusions and preventing the formation of large size inclusions.
作者
谌智勇
储焰平
杨文
辛广胜
刘南
音正元
CHEN Zhiyong;CHU Yanping;YANG Wen;XIN Guangsheng;LIU Nan;YIN Zhengyuan(Steelmaking Plant,Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Bejing,Beijing 100083,China)
出处
《炼钢》
CAS
北大核心
2020年第4期12-18,共7页
Steelmaking
基金
国家自然科学基金资助项目(51874031,U186026,51725402)。
关键词
重轨钢
脱氧
夹杂物
热力学
heavy rail steel
deoxidization
inclusions
thermodynamics
