(燕山大學(xué)國(guó)家冷軋板帶裝備及工藝工程技術(shù)研究中心，秦皇島 066004)
摘 要: 雙金屬層狀復(fù)合帶固-液鑄軋成形是集快速凝固與軋制復(fù)合為一體的短流程新工藝，為揭示固相覆層金屬帶材與基體熔體在雙輥鑄軋區(qū)內(nèi)的復(fù)合機(jī)理，以d160 mm×150 mm雙輥實(shí)驗(yàn)鑄軋機(jī)為對(duì)象，利用Fluent商用軟件建立Cu/Al固-液鑄軋復(fù)合過程二維熱-流耦合計(jì)算模型，研究鑄軋速度、澆注溫度、銅帶厚度和預(yù)熱溫度對(duì)熔池流場(chǎng)、KISS點(diǎn)位置與復(fù)合界面溫度分布的影響規(guī)律。Cu/Al固-液鑄軋復(fù)合實(shí)驗(yàn)結(jié)果表明，鑄軋區(qū)內(nèi)固-液接觸區(qū)、固-半固態(tài)粘連區(qū)、固-固軋制復(fù)合區(qū)界面結(jié)合效果呈現(xiàn)遞進(jìn)式強(qiáng)化規(guī)律，顯示出溫度和軋制壓力對(duì)界面復(fù)合的重要作用，對(duì)成形工藝制定具有重要的指導(dǎo)意義。
關(guān)鍵字: 固-液鑄軋復(fù)合；Cu/Al復(fù)合帶；雙輥鑄軋；熱-流耦合；復(fù)合界面
（National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,
Yanshan University, Qinhuangdao 066004, China）
Abstract:Bimetallic layered composite strip with solid-liquid cast-rolling process is a new short flow technology which combined rapid solidification with composite rolling. Taking the d160 mm×150 mm experimental twin-roll caster as research object, a two-dimensional thermal-flow coupled model for Cu/Al solid-liquid cast-rolling process was established with commercial software Fluent to reveal the bonding mechanism between the solid copper strip and molten aluminum in twin roll casting zone. From the simulation results, the influences of cast-rolling speed, casting temperature, copper strip thickness and preheat temperature on the flow field in molten pool, KISS point location and the temperature distribution of bonding interface were studied. A Cu/Al solid-liquid cast-rolling bonding experiment was carried out. The experimental results indicate that the interface bonding effect is enhanced gradually from the solid-liquid contact zone to solid-mushy adhesion zone and solid-solid roll bonding zone, and the temperature and contact pressure play an important role on the metallurgical bonding effect of Cu/Al interface. It provides an important guidance to design this new forming process.
Key words: solid-liquid bonding by cast-rolling; Cu/Al composite strip; twin-roll casting; thermal-flow coupled; bonding interface
