Crack Analysis and Research of Large-scale Thin-wall Cabin Body Castings of Aluminum Alloy
The fracture of a large-scale thin-wall cabin body casting of aluminum alloy was studied by conventional physicochemical examination and electronic microscope.The formation mechanism of cracks in the casting were researched and analyzed.And the reasonable measures against cracks were determined.The results show that,by the measurement of optimizing smelting quality,pouring system and cabin body structure,and controlling the process parameters of pouring system and the deformation of cabin body,the manufactured cabin body castings meet the performance requirement,in which oxide inclusion is reduced and the crack is eliminated.