ATM high pressure die casting (ATM) is a variant of the traditional high pressure die casting (HPDC) process and offers better casting quality at a lower dollar and environmental costs when compared with HPDC. The improved quality in both aluminum and magnesium alloy castings is derived from a refined microstructure in which defect-forming suspensions and pores are also refined and more homogeneously dispersed.[1-4] The higher mechanical (and potentially greater fatigue) properties provide an opportunity for reducing section thicknesses of castings, with the ultimate benefit being a reduction in the weight of the vehicle. In this article the authors describe how the introduction of an orifice-type constriction in the path of the injected melt flow results in modifications to the microstructure in ATM castings. They provide evidence for the higher integrity achieved by ATM through a case study of a commercial automotive casting being produced since 2005 and they illustrate, through finite element analysis (FEA), the potential for component weight reduction.
Vehicle Weight Reduction Opportunities Offered by the ATM High Pressure Die Casting Technology
Sae Technical Papers
SAE World Congress & Exhibition ; 2009
2009-04-20
Conference paper
English
Vehicle weight reduction opportunities offered by the ATM high pressure die casting technology
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