Patent ID: 9284636
Filing Date: 2016-03-15
CPC Classification: C22C,C22F

Claim Text:
1. A method for transforming the impact toughness coefficient of an aluminum component consisting essentially of the steps of: casting a cast component from a modified aluminum alloy using a low pressure permanent mold (LPPM) casting process, wherein said modified aluminum alloy consists essentially of up to 0.20% copper, up to 0.10% manganese, less than 0.12% iron, up to 0.10% zinc, up to 0.90% magnesium by weight, up to 0.20% titanium by weight, silicon and a balance of aluminum, wherein said modified aluminum alloy contains a silicon-to-magnesium product ratio R of 4.0, wherein R is determined using the formula R=M×S, wherein M is a percentage of Magnesium in said modified aluminum alloy and S is a percentage of Silicon in said modified aluminum alloy; heating said cast component at a solution treatment temperature for up to one hour; cooling said cast component by quenching; heating said cast component at a second temperature for up to one hour; and cooling said cast component.