本文關鍵詞： 鋁合金 黏度 鑄嘴 有限元模擬 流熱場　出處：《中南大學學報(自然科學版)》2015年05期 　論文類型：期刊論文

【摘要】：針對3004鋁合金鑄軋生產中熔體流動性差、鑄嘴布流困難、易造成板面缺陷的現(xiàn)象,采用高溫熔體黏度測量儀對3004鋁合金熔體黏度進行測量,根據(jù)實測物理參數(shù)與生產工況,采用COMSOL Multiphysics軟件對熔體在2種不同結構鑄嘴中的流熱場進行有限元模擬分析,根據(jù)模擬結果對鑄嘴結構進行優(yōu)化設計與實驗檢測。研究結果表明:在660~750℃范圍內其黏度μ與溫度θ的關系可表達為μ=10-3×exp(0.059+621.379/θ);當鑄嘴入口2邊的擋塊與水平方向成8°傾斜角,擋塊與分流塊間間距為30 mm時,鑄嘴型腔內容易產生渦流,流熱場分布不均勻;當鑄嘴入口2邊擋塊水平設置,擋塊與分流塊間間距為50 mm時,熔體流動平緩,流熱場分布較均勻。實驗驗證了模擬結果的準確性與優(yōu)化方案的可行性。
[Abstract]:Aiming at the phenomenon that the melt fluidity of 3004 aluminum alloy is poor, the flow of casting nozzle is difficult, and the plate surface defect is easy to be caused, the melt viscosity of 3004 aluminum alloy is measured by high temperature melt viscosity measuring instrument. According to the measured physical parameters and production conditions, the flow and heat field of melt in two different structure nozzles was simulated and analyzed by COMSOL Multiphysics software. According to the simulation results, the optimum design and experimental test of the nozzle structure are carried out. The results show that the relationship between the viscosity 渭 and the temperature 胃 can be expressed as 渭 10 ~ (-3) 脳 exp. in the range of 660 ~ 750 鈩，

本文編號：1490367