セミソリッド鋳造した５０５２アルミニウム合金の凝固組織
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In this study, we performed semisolid casting of the 5052 aluminum alloy using an inclined cooling plate to find the casting conditions for the finest grain size in the solidified structure. The casting conditions in this experiment were pouring temperatures onto the inclined cooling plate, length and angles of the cooling plate, and thickness of BN coating on the cooling plate. Although the solid-liquid coexistence zone of the 5052 alloy is narrower than that of the AC4CH alloy, the inclined cooling plate is useful, and we obtained an average grain size of 60 μm. The BN coating film must be as thin as possible because of the significant undercooling of the molten alloy. Greater undercooling causes more increased nucleation and more increased number of crystals to grow on the cooling plate. As a result, fine and granular crystals were obtained. The thermal boundary layer between the BN coating layer and the molten alloy, and the undercooling of the molten alloy were influenced by the flow speed of the molten alloy on the plate.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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