运用双辊快速凝固方法将液态Ａｌ－１２．６％Ｓｉ合金直接制备成厚度为０．１～０．５ｍｍ的薄带。介绍了这一方法的基本原理、特点和试验设备设计中的关键问题。辊面可控线速度Ｖｒ为２～８．５ｍ／ｓ，薄带厚度正比于Ｖｒ－１／２。薄带组织为细小的初晶α－Ａｌ和极细小的（α－Ａｌ＋Ｓｉ）共晶体，塑性和抗拉强度得到明显改善 The liquid Al-12.6% Si alloy was directly prepared into a strip with a thickness of 0.1-0.5 mm by a two-roll rapid solidification method. The basic principle, characteristics and key problems in the design of test equipment are introduced. The controllable linear velocity Vr of the roll surface is 2 ~ 8.5m / s, the thickness of the strip is proportional to Vr-1/2. The microstructure of the ribbons is a combination of fine primary α-Al and very fine (α-Al + Si) eutectics with a marked improvement in ductility and tensile strength