(1. 華東理工大學(xué) 機(jī)械工程學(xué)院， 上海 200237;
2．中南大學(xué) 機(jī)電工程學(xué)院， 長(zhǎng)沙 410083)
摘 要: 在鋁材鑄軋過(guò)程中， 材料凝固和冷卻所釋放的熱量都要通過(guò)成型界面?zhèn)鲗?dǎo)給輥套， 并最終由輥套內(nèi)部的冷卻水帶走。 在分析鑄軋過(guò)程中傳熱特點(diǎn)的基礎(chǔ)上，建立了傳熱過(guò)程的基本方程與數(shù)學(xué)模型， 并針對(duì)3種典型的鑄軋工況進(jìn)行了界面?zhèn)鳠嵝袨榈姆抡嫜芯俊?結(jié)果表明： 隨著鑄軋過(guò)程的進(jìn)行，成型界面的溫度差值和熱流密度均顯著減小， 因此， 熱量傳遞主要在鑄軋區(qū)的前半段進(jìn)行； 隨著鑄軋速度的提高， 鑄軋區(qū)內(nèi)輥套表面的最高溫度不斷下降， 導(dǎo)致成型界面上的溫度差值不斷增大，界面熱流密度增大并趨于均勻， 從而提高了界面的傳熱能力。
關(guān)鍵字: 鋁； 鑄軋；界面； 傳熱； 仿真
（1. College of Mechanical Engineering,
East China University of Science and Technology,
Shanghai 200237, China;
2. College of Mechanical and Electrical Engineering,
Central South University, Changsha 410083, China）
Abstract:In cast-rolling process of aluminum, the heat released during solidification and cooling is transferred to rollers through shaped interface at first, and finally taken away by inner cooling water of rollers. The basic equation and mathematics model of heat transfer were established on the basis of analysis on heat transfer characteristic for aluminum cast rolling; and the heat transfer behaviors of shaped interface for three kinds of typical conditions were simulated. The results show that, the temperature gap and heat flow density decrease markedly with the process of cast-rolling proceeding, so the heat is transferred mainly on the front part of cast-rolling zone; with increasing cast-rolling speed, the highest temperature of roller surface decreases in the cast-rolling zone, resulting in that the temperature gap of shaped interface increases continuously and the heat flow density increases, thereby the heat transfer capacity on shaped interface is improved.
Key words: aluminum; cast-rolling; interface; heat transfer; simulation
