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Abstract：
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A metal mold of aluminum alloy tensile specimen with different pouring systems was designed to reduce the defects of casting part and improve the quality of casting part, and the casting process was simulated by software ProCAST. Then, the physical fields during the filling and solidification process of tensile samples were analyzed, and the casting defects and the secondary dendritic arm spacing were predicted. Furthermore, the rationality of the optimized mold was determined and verified by experiments. The results show that the optimized mold effectively prevents the metal liquid with oxide film in the front stage from entering the cavity, and the tapered runner in the optimized mold makes the filling process stable to avoid the phenomenon of gas filling in the cavity. In addition, the sample realizes solidified sequentially and successfully eliminates the shrinkage defect, the secondary dendrite arm spacing of specimen is 33.2 μm, the tensile strength is 215 N·mm-2, the yield strength is 173 N·mm-2, and the elongation after fracture is 4.5%. Thus, the optimized mold effectively reduces the casting defects in the tensile samples and the secondary dendrite arm spacing, and the mechanical properties of tensile specimens are improved.
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Funds：
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AuthorIntro：
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王彦凤（1970-），女，硕士，副教授，E-mail：wyf70518@163.com
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Reference：
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