FREMGANGSM}TE VED FREMSTILLING AV EN SKOVL.

摘要

Airfoil-shaped bucket cores having grooves recessed into the surfaces thereof must be covered with an outer layer to provide the requisite aerodynamic and wearing surface and to define the cooling passages. In order to apply this outer layer by flame spraying (or comparable method of particle deposition), the core surface is first covered with a substrate layer. This substrate layer is provided with means by which later-applied surface coating material will be anchored in place. Thereafter, the outer material is applied (as by flame spraying, for example) and the surface thereof is ground and polished to dimension as may be needed.