Using a Grain Refiner to Reduce Hot Tearing in Permanent Mold Cast B206

摘要

Manipulating the titanium content of 206 aluminum alloy has been shown to improve hot tear resistance and increase sensitivity to titanium-based grain refiners. However, B206 still remains prone to the defects, particularly when cast via the permanent mold process due to the rigidity of the metal mold. Hot tears or cracks form during casting solidification due to insufficient feeding in areas of elevated stress, such as thermal stresses generated during solidification and mechanical stresses from restrained casting contraction.