( 北京科技大學 材料科學與工程學院， 北京 100083)
摘 要: 介紹了雙帶快冷法制備金屬帶材新技術(shù)的基本原理和特點。 針對1050純鋁帶材的成形， 從理論和實驗兩個方面分析了采用孔徑為6 mm的5孔噴嘴時， 熔體射流的穩(wěn)定性和冷卻帶線速度對帶材質(zhì)量的影響； 考察了不同冷卻帶線速度條件下成形帶材的組織和力學性能。 發(fā)現(xiàn)冷卻帶線速度越高， 所成形帶材的組織越細小、 力學性能越好； 在本實驗條件下， 穩(wěn)定制備1050純鋁帶材的合理工藝參數(shù)是： 澆注溫度710℃， 氣體壓力0.007 5 MPa， 冷卻帶線速度2 m/s。
關(guān)鍵字: 快速凝固； 雙帶快冷法； 金屬帶材； 鋁
（ School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract: The principle and characteristics of double cooling-strip rapid solidification technique for strip forming are introduced. Aiming at the forming of aluminum strip with jet nozzle having 5 holes of 6 mm in diameter, the effects of two main factors on the strip quality, the jet stability of melt metal and cooling-strip speed were discussed through both theory and experiment. The microstructure and mechanical properties at different cooling-strip speeds were examined ,and the results show that the microstructure is more fine and the mechanical properties are higher with increasing cooling-strip speed . The appropriate technology parameters for fabricating aluminum strip are: pouring temperature 710 ℃, gas pressure 0.0075 MPa and cooling-strip speed 2 m/s.
Key words: rapid solidification; double cooling-strip rapid solidification technique; metal strip; aluminum
