由双峰颗粒级配(粒配)粉配制的涂料,其流性指数n、稠密系数K、剪切应力(流动阻力)τ均较低,择优粒配可使涂料较大幅度地增加粉液比、提高型腔表面光洁度、改变铸件表面质量(详见文献[1])。用正交试验方法研究粒配与涂料流变性间的关系,选出具有较佳流变性的双峰粉配(见图1)。图中粒配粉的粒径分布在0—80μ范围内,细粉峰高约30％,<15μ细粉含量约35％,<30μ细粉含量的44％(该粉即表 The coatings prepared by Shuangfeng particle grading (granulation) powder have lower flow index n, thick coefficient K and shear stress (flow resistance) τ. Than to improve cavity surface finish, change the surface quality of castings (see [1]). Orthogonal test method was used to study the relationship between the particle size distribution and the rheology of the coating. The bimodal powder with better rheological properties was selected (Fig. 1). Particle size distribution of the powder distribution map in the 0-80μ range, fine powder peak height of about 30%, <15μ fine powder content of about 35%, <30μ fine powder content of 44% (the powder that is