Aluminum-Titanium-Boron Inoculation
Aluminum-titanium-boron inoculation adds metal nucleants to the melt to produce a fine, equiaxed cast structure. This improves mechanical properties and prevents porosity.
Physicochemical Mechanism of Action
Aluminum-titanium-boron inoculation introduces metal nucleants into the melt, which condense into crystals during cooling. These crystals act as nuclei for the cast structure and promote uniform cell formation.
Metallurgical Relevance & Risks in Welding
A fine, equiaxed cast structure increases mechanical properties like strength and ductility. It also prevents porosity, which improves toughness. However, missing or excessive inoculation can lead to uneven structures that may cause cracks or damage in the casting.
Workshop Practice & Action Guidelines
Use aluminum-titanium-boron inoculation at 0.1 to 0.3 % of the metal weight. Add the inoculant to the melt before casting and stir thoroughly. Ensure even distribution of the inoculant in the weld pool.