无氟连铸保护渣流变特性的研究

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基金项目:

国家自然科学青年基金项目 (51404088)；河北省自然科学基金项目 (E2015209217)。

Study on Rheological Properties of Fluorine-free Continuous Casting Mould Powder

College of Metallurgy & Energy, North China University of Science and Technology, Key Laboratory for Advanced Metallurgy Technology, Hebei Province High Quality Steel Continuous Casting Engineering Technology Research Center, Tangshan 063009, Hebei, China

摘要: 利用现场生产用原料配置保护渣基样, 分别以B₂O₃、TiO₂作为CaF₂的替代物, 测定了不同含量CaF₂、TiO₂、B₂O₃保护渣的黏度和转折温度, 绘制了相应的lnη-1/T曲线图, 并进行拟合计算得到了其黏流活化能。深入分析了保护渣中CaF₂、TiO₂、B₂O₃含量的变化趋势及对保护渣流变特性影响的内在原因, 得出了适宜流变特性的无氟保护渣中合理的TiO₂、B₂O₃含量, 保护渣内的TiO₂含量不超过9%, B₂O₃含量不超过7%。
- 连铸 /
- 无氟保护渣 /
- 黏度 /
- 黏流活化能 /
- 熔化温度 /
- 转折温度
Abstract: In this paper the transition temperature and viscosity of mould powder with different B₂O₃,TiO₂ and CaF₂ had been measured,and the corresponding lnη-1/T curve had been plotted.Viscous flow activation energy had been calculated through fitting method.The effect of CaF₂,TiO₂ and B₂O₃ contents on the rheology characteristics of mould powder had been investigated.The reasonable TiO₂ and B₂O₃ contents for appropriate rheological properties of mould powder without fluorine are less than 9% and 7%,respectively.
- continuous casting /
- mold powder /
- fluorine /
- viscosity /
- viscous flow activation energy flux /