Patent ID: 9243502
Filing Date: 2016-01-26
CPC Classification: B22C,B22F,B23K,B23P,B28B,C04B,C30B,F01D,F05D,Y02P,Y10T

Claim Text:
1. A method of manufacturing an airfoil comprising the steps of: depositing multiple layers of powdered metal onto one another; joining the layers to one another with reference to CAD data relating to a particular cross-section of an airfoil; and producing the airfoil with leading and trailing edges joined by spaced apart pressure and suction sides to provide an exterior airfoil surface, a cooling passage arranged interiorly of the exterior airfoil surface and providing an interior surface, the interior cooling surface including micro-bumps protruding from the interior cooling surface into the cooling passage, the micro-bumps discrete from and noncontiguous relative to one another in multiple directions along the interior cooling surface, wherein the micro-bumps are noncontiguous from one another 360° about each micro-bump along the interior cooling surface.