一、引 言 单辊急冷法制取非晶簿带工艺简便,适于大量生产,依照此法,熔融金属流撞击到快速旋转的冷辊表面,形成动态金属熔潭,非晶薄带的冷速、几何形状和表面质量等,主要取决于这股熔融金属的流体动力学以及气流界面层的作用.为了避免或减少气流层的影响,曾作过阻流试验,采用局 I. INTRODUCTION The single-roll quenching method is simple and convenient for mass production. According to this method, molten metal flow impinges on the surface of the rapidly rotating cold roll to form a dynamic molten metal bath and the cooling rate of the amorphous ribbon. Geometry and surface quality, etc., mainly depends on the hydrodynamics of the molten metal and the role of the airflow interface layer.In order to avoid or reduce the impact of the airflow layer, has made a blocking flow test, the use of Bureau