(1. 華北工學(xué)院 材料工程系， 太原 030051；
2. 西北工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院, 西安 710072)
摘 要: 鑄件/鑄型邊界熱交換系數(shù)的準(zhǔn)確性是凝固模擬精度的關(guān)鍵因數(shù)之一。 在實驗研究基礎(chǔ)上，應(yīng)用非線性估算法確定了鋁鑄件凝固模擬邊界熱交換系數(shù)變化規(guī)律， 并通過數(shù)學(xué)分析建立了一種近似求解邊界熱交換系數(shù)的通用數(shù)學(xué)模型。 通過實際鋁鑄件進(jìn)行的模擬驗證， 證明了該模型的正確性和通用性。
關(guān)鍵字: 非線性估算法; 熱交換系數(shù); 鑄件； 凝固模擬
（1. Department of Materials Engineering,
North China Institute of Technology, Taiyuan 030051, China;
2. School of Materials Science and Engineering,
Northwestern Polytechnical University,Xi′an 710072, China）
Abstract:The boundary heat-transfer coefficient at casting /mould interface is a key factor affecting solidification simulation accuracy. Based on experimental research, the boundary heat-transfer coefficient for casting solidification simulation was determined by using non-linear estimate calculation method. The approximate method to calculate boundary heat-transfer coefficient was also established by mathematics analysis. The general model of boundary heat-transfer coefficient is a function with change of time. At last, the simulation results were contrasted with actual casting results and it was verified that the general model is responsible.
Key words: non-linear estimate calculation method; boundary heat-transfer coefficient; casting; solidification simulation
