Grain refinement is one of the important means to improve the strength and plastic toughness of aluminum and aluminum alloy sheets and strips, and an important way to improve the quality of aluminum materials.
The cast-rolled strip has a fine equiaxed structure, which can make the anisotropy of the product small, the deformation is uniform during processing, and the impurities, slag inclusions and the bottom melting point eutectic structure segregated on the grain boundary are more uniformly distributed. The mechanical properties and processing properties of the strip are good.
The mechanism of grain refinement: two ways to promote nucleation and inhibit grain growth.