( 北京科技大学 材料科学与工程学院， 北京 100083)
摘 要: 介绍了双带快冷法制备金属带材新技术的基本原理和特点。 针对1050纯铝带材的成形， 从理论和实验两个方面分析了采用孔径为6 mm的5孔喷嘴时， 熔体射流的稳定性和冷却带线速度对带材质量的影响； 考察了不同冷却带线速度条件下成形带材的组织和力学性能。 发现冷却带线速度越高， 所成形带材的组织越细小、 力学性能越好； 在本实验条件下， 稳定制备1050纯铝带材的合理工艺参数是： 浇注温度710℃， 气体压力0.007 5 MPa， 冷却带线速度2 m/s。
关键字: 快速凝固； 双带快冷法； 金属带材； 铝
（ 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
