小型レーダー筐体（AC7A）各部の顕徴鏡組織について:（アルミニウム合金鋳物の実体試験第2報）

概要

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The mechanical properties of the various parts of radar hausing made from AC7A are investigated as one of the examination on the aluminium alloy casting in JIS standard, for the purpose of obtaining the data for machine design and production. And, these properties are compared with standard specimens by metal moulding (JIS) and by sand moulding (Federal, USA) both of which cast at the same time. The radar hausing has the more similar feature to that of the sand moulding specimen than that of the metal moulding specimen, yet some differences in properties were found in various parts, caused by the ununiformity of the casting pressure, the difference cooling condition and so on, resulted from the complexity of the shape of the casting. In this paper, the microscopic structures of the various parts of radar hausing, etched with 0.5% hydrofluoride solution, are examined, comparing the structure of the metal moulding with that of the sand moulding specimen, and above-mentioned facts are ascertined. The Authors wish to add that this reasearch was subsidized by the Institute of Light Metal Foundation.
日本鋳造工学会の論文