采用搅拌法,在热态石墨基体表面交替涂覆SrCl2和酚醛树脂,经烘焙后,获得了SrCl2和隔离层交替叠层的SrCl2变质剂。AFM图像显示,SrCl2层和隔离层的几何特征尺寸均接近纳米级。将制备的纳米SrCl2变质剂用于变质处理AlSi7Mg合金,发现合金中0.005 wt%的Sr即可获得良好的力学性能,而且变质作用起效快、持续时间长,变质操作便捷。 SrCl2 and phenolic resin were alternately coated on the surface of hot graphite substrate by stirring method. After baking, SrCl2 and SrCl2 were laminated alternately. AFM images show that the geometrical dimensions of the SrCl2 layer and the isolation layer are close to the nanometer level. The prepared nano-SrCl2 modifier was used to modify AlSi7Mg alloy. It was found that 0.005wt% Sr in the alloy can obtain good mechanical properties, and the metamorphism has rapid onset, long duration and easy metamorphism operation.