Thermodynamic determination of low melting area in CaO-Al2O3-SiO2-MgO-MnO system inclusion and its control in spring steel
Considering the importance of CaO-Al2O3-SiO2-MgO-MnO system in spring steel production, the present authors calculated 1000 liquidus projection figures of this system with CALPHAD technique. The effect of each oxide component on low melting point area (below 1673K) of this system has been attained. Furthermore, the system with the maximum low melting point area, i.e., CaO-19.23％Al2O3-SiO2-3.85％MgO-MnO, has been obtained. On the basis of the previous work, the contents of solutes: oxygen, aluminum, calcium, and magnesium in liquid steel of many spring grades have been computed by using FactSage software under condition of the inclusion compositions in the steel falling in the low melting point area of CaO-19.23％Al2O3-SiO2-3.85％MgO-MnO system. In addition, the controlled ranges of the low point inclusion composition and those of the liquid steel in equilibrium with the inclusion were determined on the condition of very low dissolved oxygen contents. As an example, the calculated results for 60Si2Cr grade steel refining are exhibited in the present paper.
CaO-Al2O3-SiO2-MgO-MnO system inclusion low melting point zone thermodynamics
Bo ZHANG Fuming WANG Changrong LI
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 10 School of Material Science and Engineering, University of Science and Technology Beijing, 100083, Ch
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-8
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）