The technology can assure better surface quality and high dimensional precision and increase the filling ability of the alloy and improve inner quality of the casting, so it can be adopted for the casting with strict quality requirements and high complexity, especially for high integrity and high gas-tight aluminum castings.

By X-ray detector,Electronic microscope and energy pedigree instrument,the dispersion lacuna in Zl101A aluminium alloy cast was analyzed.

According to the result of experiments, the author point out that the high strength and high collapsibility resin coated sands used in producing the aluminum alloy castings should be: ① using rounded or near rounded sand; ② using ordinary PF resin; ③ using some strengthening and toughening agents;④ using satiable collapse agents.

According to the standard-《The standard in which flaws in aluminum alloy casts inspected by radiograph is graded》,this paper studies how the natural flaws in aluminum alloy casts can be recognized in reading radiograph film by computer aided system,and presents the methods for recognization of five kinds of common flaws in aluminum alloy casts.

According to the graded standard for flaws in aluminum alloy casts inspected by radiograph, a method of feature extraction and flaw quantification is brought up to quantify the air hole flaw in aluminum alloy cast inspected by radiograph.

Based on studying the technical properties of zircon sand and PEPSET nobake sand, the effect of zircon nobake sand on properties of aluminium casting is studied.

Effect of Porosity on Mechanical Property in Aluminum Alloy Castings;

In order to ensure the quality of the large aluminum alloy castings, the mechanical properties of the casting were predicted by the numerical simulation method in this paper.