(1. 北京科技大學(xué) 材料先進(jìn)制備技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室，北京 100083；
2. 煙臺孚信達(dá)雙金屬股份有限公司，煙臺 264118)
摘 要: 制備斷面尺寸為50 mm×30 mm、銅包覆層厚度為3 mm的矩形斷面銅包鋁復(fù)合材料，研究結(jié)晶器長度、拉坯速度、芯管長度和一次冷卻水流量對矩形斷面銅包鋁復(fù)合材料水平連鑄直接復(fù)合成形過程的影響。結(jié)果表明：當(dāng)連鑄結(jié)晶器長度為150 mm、芯管長度為125 mm時，較為合理的拉坯速度范圍為75~90 mm/min；當(dāng)拉坯速度過慢時，鋁液的填充不連續(xù)，導(dǎo)致芯部鋁的收縮或冷隔等缺陷；當(dāng)拉坯速度過快時，銅鋁界面反應(yīng)嚴(yán)重；當(dāng)拉坯速度為75 mm/min 時，合理的一次冷卻水流量為700 L/h，一次冷卻水流量大于1 000 L/h導(dǎo)致鋁液填充不連續(xù)，一次冷卻水流量小于400 L/h則導(dǎo)致銅鋁界面反應(yīng)加劇。通過檢測芯管出口位置處的石墨內(nèi)襯溫度變化可有效監(jiān)控鋁液的填充行為以及連鑄過程的穩(wěn)定性。
關(guān)鍵字: 銅包鋁；復(fù)合材料；矩形斷面；水平連鑄
（1. Key Laboratory for Advanced Materials Processing, Ministry of Education, University of Science and Technology
Beijing, Beijing 100083, China; 2. Yantai Fisend Bimetal Co., Ltd., Yantai 264118, China）
Abstract:Copper cladding aluminum (CCA) composite materials with the section dimensions of 50 mm×30 mm and the sheath thickness of 3 mm were fabricated by horizontal core-filling continuous casting (HCFC) technology. The effects of the crystallizer length, withdrawing speed, mandrel tube length and flux of the primary cooling water were studied. The results show that when the crystallizer length is 150 mm and the mandrel tube length is 125 mm, the rational withdrawing speed is 75−90 mm/min. Too low withdrawing speed leads to the discontinuous filling process of liquid aluminum, which causes shrinkage or cold shuts. Conversely, too high withdrawing speed results in serious interface reaction between copper and aluminum. At the withdrawing speed of 75 mm/min, the rational primary cooling water is 700 L/h. The flux of primary cooling water above 1 000 L/h leads to the discontinuous filling process of the liquid aluminum, but the flux of primary cooling water below 400 L/h leads to severe interface reaction. The filling behavior of the liquid aluminum and the stability of the continuous casting can be controlled by monitoring the temperature variation of the graphite mould at the position corresponding to the outset of the mandrel tube.
Key words: copper cladding aluminum; composite materials; rectangle section; horizontal continuous casting
