(1. 北京科技大學(xué) 材料先進(jìn)制備技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室，北京 100083；
2. 北京科技大學(xué) 新材料技術(shù)研究院，北京 100083)
摘 要: 建立了熱冷組合鑄型(HCCM)水平連鑄管材溫度場模擬模型，采用實(shí)驗(yàn)與模擬相結(jié)合的方法修正界面的換熱系數(shù)條件。所建立的HCCM水平連鑄全尺寸模擬模型和所施加邊界條件的誤差小于6%，可較好地模擬實(shí)際傳熱過程的溫度場。模擬結(jié)果表明：當(dāng)拉坯速度由20 mm/min增加到110 mm/min時，兩相區(qū)寬度由20 mm增加至30 mm；當(dāng)熱型段加熱溫度由1 150 ℃提高到1 300 ℃時，兩相區(qū)寬度由30 mm減小至12 mm；當(dāng)冷型段冷卻水流量由300 L/h增加到900 L/h時，兩相區(qū)寬度由30 mm減小至20 mm；當(dāng)采用增加熱阻的改進(jìn)鑄型結(jié)構(gòu)時，兩相區(qū)寬度由25 mm減小至12 mm。d 50 mm×5 mm BFe10管材HCCM水平連鑄合理的制備參數(shù)為：熔體保溫溫度1 250 ℃，連鑄拉坯速度50~80 mm/min，熱型段加熱溫度1 200~1 300 ℃，冷型段冷卻水流量500~700 L/h。
關(guān)鍵字: BFe10合金；熱冷組合鑄型；水平連鑄；溫度場模擬
（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
