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AssigneeNoritake Co., Limited
InventorsHirokazu Watanabe, Akihiro Kawahara, Tsuyoshi Hondo, Kouji Inukai, Shinji Kato
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According to the present invention, an additively manufactured ceramic core having both strength and collapsibility, and meltability and moreover having surface roughness improved is provided. The additively manufactured ceramic core disclosed herein is an additively manufactured ceramic core to be used as a core when manufacturing a metal casting and includes a central part corresponding to an additively manufactured fired body of a predetermined ceramic powder, a first layer covering at least a part of the central part, and a second layer formed on a surface layer of the first layer. When an average erosion rate corresponding to an average value of erosion rates calculated from an expression: erosion rate (μm/g)=B/A in which A g represents a projection quantity of projection particles and B μm represents an erosion depth in a fragility test is used, the average erosion rate of the first layer is lower than that of the central part and the average erosion rate of the second layer is higher than that of the first layer. The second layer has a surface roughness Ra of 10 μm or less.
An additively manufactured ceramic core to be used as a core when manufacturing a metal casting, the additively manufactured ceramic core comprising a central part corresponding to an additively manufactured fired body of a predetermined ceramic powder, a first layer covering at least a part of the central part, and a second layer formed on a surface layer of the first layer, wherein when an average erosion rate corresponding to an average value of erosion rates calculated from an expression:
Dependencies are inferred from the claim text.