(1. 燕山大學(xué) 國家冷軋板帶裝備及工藝工程技術(shù)研究中心，秦皇島066004；
2. 燕山大學(xué) 機(jī)械工程學(xué)院，秦皇島 066004)
摘 要: 金屬包覆材料多輥固-液鑄軋復(fù)合工藝集固-液鑄軋復(fù)合技術(shù)與多輥孔型軋制技術(shù)的優(yōu)勢為一體，可以實現(xiàn)高效率、短流程連續(xù)成形。為了通過數(shù)值模擬技術(shù)縮短工藝開發(fā)周期，針對布流區(qū)內(nèi)鋼/銅固-液界面?zhèn)鳠釂栴}，基于一維非穩(wěn)態(tài)傳熱原理反求界面換熱系數(shù)，擬合了其與鋼側(cè)表面溫度相關(guān)的計算模型，推導(dǎo)了差分計算模型并利用Visual Basic軟件編制了計算程序，分析了工藝參數(shù)對基體溫度分布的影響規(guī)律。結(jié)果表明：基體經(jīng)過布流區(qū)后，表面溫度高，芯部溫度低，有利于同時獲得較高表面溫度和足夠基體強(qiáng)度；在工藝參數(shù)常規(guī)調(diào)整范圍內(nèi)，覆層溫度對基體溫度影響較小，名義鑄軋速度、覆層高度、基體半徑對基體溫度影響較為顯著。就工藝控制角度而言，只有覆層高度可根據(jù)需要在較大范圍內(nèi)進(jìn)行調(diào)整，從而調(diào)控鑄軋區(qū)入口處的基體溫度。
關(guān)鍵字: 銅包鋼；固-液界面；鑄軋復(fù)合；傳熱；換熱系數(shù)
（1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China;
2. College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China）
Abstract:The multi-roll solid-liquid cast-rolling bonding (MRSLCRB) process of metal cladding materials integrates the advantages of solid-liquid cast-rolling bonding technology and multi-roll groove rolling technology, which can realize high efficiency, short flow and continuous forming. To shorten the process development cycle by numerical simulation, aiming at the steel/Cu solid-liquid interfacial heat transfer in the delivery zone, the interfacial heat transfer coefficient was computed inversely based on one-dimensional unsteady heat transfer principle, and the calculation model related to steel bar surface temperature was fitted. The differential calculation model was derived and the calculation program was compiled by the Visual Basic software. The influences of process parameters on substrate temperature were analyzed. The results show that, when the substrate pass through the delivery zone, the surface temperature is high and the core temperature is low. Hence, this case can ensure sufficient strength of the substrate metal while obtaining high surface temperature. In the conventional adjustment range of process parameters, the cladding temperature has little effect on the substrate temperature. The nominal cast-rolling velocity, the cladding height, and substrate radius have significant effects on the substrate temperature. From the view of process control, only the cladding height can be adjusted in a wide range according to the requirement, so as to control the substrate temperature at the cast-rolling zone entrance.
Key words: copper cladding steel; solid-liquid interface; cast-rolling bonding; heat transfer; interfacial heat transfer coefficient
