Ultra-wide aluminum alloy end wall profile and application thereof

The invention relates to the technical field of aluminum alloy profiles, in particular to an ultra-wide aluminum alloy end wall profile and application thereof. The width of the ultra-wide aluminum alloy end wall profile is 780 +/-1.5 mm. The ultra-wide aluminum alloy end wall profile comprises the following elements: 0.77 wt%-0.87 wt% of Si, less than or equal to 0.30 wt% of Fe, less than or equal to 0.25 wt% of Cu, less than or equal to 0.30 wt% of Mn, 0.40 wt%-0.60 wt% of Mg, less than or equal to 0.25 wt% of Cr, less than or equal to 0.10 wt% of Zn, less than or equal to 0.10 wt% of Ti, 0.12 wt%-0.30 wt% of Mn + Cr, and the balance of Al and inevitable The ultra-wide aluminum alloy end wall profile is obtained by extruding a casting rod by a phi 650mm extrusion container through a shunting expansion die, and the extrusion speed is 1.5 m/min. The ultra-wide aluminum alloy end wall profile has the advantages of higher strength, better weldability and fatigue resistance, high dimensional precision technical