本文關(guān)鍵詞： 鋁合金 黏度 鑄嘴 有限元模擬 流熱場(chǎng)　出處：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2015年05期 　論文類(lèi)型：期刊論文

【摘要】：針對(duì)3004鋁合金鑄軋生產(chǎn)中熔體流動(dòng)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(cè)量?jī)x對(duì)3004鋁合金熔體黏度進(jìn)行測(cè)量,根據(jù)實(shí)測(cè)物理參數(shù)與生產(chǎn)工況,采用COMSOL Multiphysics軟件對(duì)熔體在2種不同結(jié)構(gòu)鑄嘴中的流熱場(chǎng)進(jìn)行有限元模擬分析,根據(jù)模擬結(jié)果對(duì)鑄嘴結(jié)構(gòu)進(jìn)行優(yōu)化設(shè)計(jì)與實(shí)驗(yàn)檢測(cè)。研究結(jié)果表明:在660~750℃范圍內(nèi)其黏度μ與溫度θ的關(guān)系可表達(dá)為μ=10-3×exp(0.059+621.379/θ);當(dāng)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(shí),鑄嘴型腔內(nèi)容易產(chǎn)生渦流,流熱場(chǎng)分布不均勻;當(dāng)鑄嘴入口2邊擋塊水平設(shè)置,擋塊與分流塊間間距為50 mm時(shí),熔體流動(dòng)平緩,流熱場(chǎng)分布較均勻。實(shí)驗(yàn)驗(yàn)證了模擬結(jié)果的準(zhǔn)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(hào)：1490367