COMPONENTS WITH NEAR-SURFACE COOLING MICROCHANNELS AND METHODS FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide methods for providing a near-surface cooling microchannel in a component without sacrificing strength and toughness of the component itself and without the need for additional resources and labor such as machining.SOLUTION: The methods include forming a near-surface cooling microchannel in a first surface of a pre-sintered preform, disposing the first surface of the pre-sintered preform onto an outer surface of the base article such that an opening of the outer surface of the base article is aligned with the near-surface cooling microchannel in the first surface of the pre-sintered preform, and, heating the pre-sintered preform to bond it to the base article, where the opening of the outer surface of the base article remains aligned with the near-surface cooling microchannel in the first surface of the pre-sintered preform. A component 10 comprising a turbine bucket is disclosed in which an airfoil 12 includes internal cooling passages 18 (e.g., cooling holes) through which bleed air that enters the component 10 through a root section 14 of the component 10 is forced to transfer heat from the component.