(1. 北京科技大学 材料先进制备技术教育部重点实验室，北京 100083；
2. 北京科技大学 新材料技术研究院，北京 100083)
摘 要: 建立了热冷组合铸型(HCCM)水平连铸管材温度场模拟模型，采用实验与模拟相结合的方法修正界面的换热系数条件。所建立的HCCM水平连铸全尺寸模拟模型和所施加边界条件的误差小于6%，可较好地模拟实际传热过程的温度场。模拟结果表明：当拉坯速度由20 mm/min增加到110 mm/min时，两相区宽度由20 mm增加至30 mm；当热型段加热温度由1 150 ℃提高到1 300 ℃时，两相区宽度由30 mm减小至12 mm；当冷型段冷却水流量由300 L/h增加到900 L/h时，两相区宽度由30 mm减小至20 mm；当采用增加热阻的改进铸型结构时，两相区宽度由25 mm减小至12 mm。d 50 mm×5 mm BFe10管材HCCM水平连铸合理的制备参数为：熔体保温温度1 250 ℃，连铸拉坯速度50~80 mm/min，热型段加热温度1 200~1 300 ℃，冷型段冷却水流量500~700 L/h。
关键字: BFe10合金；热冷组合铸型；水平连铸；温度场模拟
（1. Key Laboratory for Advanced Materials Processing, Ministry of Education,
University of Science and Technology Beijing, Beijing 100083, China;
2. Institute for Advanced Materials and Technologies, University of Science and Technology Beijing,
Beijing 100083, China）
Abstract:The model of solidification temperature field simulation during Heating-Cooling Combined Mold (HCCM) continuous casting was established and the heat transfer coefficient of interface was revised by the method of experiment combined with simulation. The established full-size model of HCCM continuous casting and the imposed boundary conditions could reflect the actual transfer process better with the error less than 6%. The simulation results show that with increasing drawing speed from 20 mm/min to 110 mm/min, the width of two-phase regions increases from 20 mm to 30 mm; with raising heating temperature from 1 150 ℃ to 1 300 ℃, the width of two-phase regions decreases from 30 mm to 12 mm; with increasing cooling water flow from 300 L/h to 900 L/h, the width of two-phase regions decreases from 30 mm to 20 mm; when an improved mold with a structure to add thermal resistance is adopted, the width of two-phase regions decreases from 25 mm to 12 mm. The appropriate parameters of d 50 mm×5 mm BFe10 tube by HCCM continuous casting are as follows: holding temperature of melt 1 250 ℃, drawing speed 50−80 mm/min, heating temperature of heating section 1 200−1 250 ℃, cooling water flow of cooling section 500−700 L/h.
Key words: BFe10 alloy; heating-cooling combined mold; horizontal continuous casting; temperature field simulation
