(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 新材料技術(shù)研究院，北京 100083)
摘 要: 以100 mm×100 mm大斷面銅包鋁棒坯為對(duì)象，建立棒坯連鑄復(fù)合成形的數(shù)值模型，確定模型的邊界條件，并通過設(shè)計(jì)的實(shí)驗(yàn)驗(yàn)證數(shù)值模型邊界條件的準(zhǔn)確性。基于驗(yàn)證的邊界條件，采用ProCast軟件對(duì)銅包鋁棒坯立式連鑄復(fù)合成形過程的穩(wěn)態(tài)溫度場進(jìn)行數(shù)值模擬，得到了各工藝參數(shù)對(duì)連鑄過程的影響規(guī)律，給出了工藝參數(shù)的調(diào)控策略和合理范圍。結(jié)果表明，制備100 mm×100 mm大斷面銅包鋁鑄坯的合理工藝參數(shù)范圍為：在保持銅液溫度1250 ℃的條件下，鋁液鑄造溫度為760~790 ℃；一冷水流量為1600~2000 L/h；二冷水流量為900~1100 L/h；二冷水距結(jié)晶器石墨套出口距離為20 mm；拉坯速度為80~100 mm/min。
關(guān)鍵字: 銅包鋁；立式連鑄復(fù)合成形；溫度場；數(shù)值模擬
（Key Laboratory for Advanced Materials Processing, Ministry of Education, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:Taking the copper clad aluminum composite billet with a large section size of 100 mm×100 mm as an object, a numerical simulation of continuous core-filling casting was established. The boundary conditions of the numerical model were determined, and its accuracy was verified by convenient experiment. Based on the verified boundary conditions, the steady-state temperature field of large section copper clad aluminum during the casting was numerically simulated by ProCast software. The effect of each processing parameter on the casting processing is obtained and the controlling method and proper range of the processing parameters are given. The results show that the reasonable processing parameters in preparing copper clad aluminum in 100 mm×100 mm cross section are as follows: under the condition of the casting temperature of copper of 1250 ℃, the casting temperature of aluminum is 760-790 ℃, the flux of the first cooling water is 1600-2000 L/h, the flux of the second cooling water is 900-1100 L/h, the distance from the second cooling water to the exit of graphite crystallizer is 20 mm, and the withdrawing speed is 80-100 mm/min.
Key words: copper clad aluminum; vertical continuous core-filling continuous casting; temperature field; numerical simulation
