Patent ID: 8703044
Filing Date: 2014-04-22
Classification: B22F,B23K,B23P,F01D,F05D,Y10T

Abstract:
1. A method of fabricating a machine component comprising: preparing at least a portion of a surface of the machine component for receiving a sintered preform such that metallurgical impurities are removed from the portion of the surface; forming a pre-sintered preform hybrid hardface mixture comprising combining a predetermined portion of at least one hardfacing material with a predetermined portion of at least one brazing material; forming a pre-sintered preform, the pre-sintered preform having a predetermined thickness; forming a sintered preform having a porosity of less than 2% and based at least on dimensions of the machine component; inserting a layer of material containing boron between the sintered preform and the machine component to facilitate a diffusion bond between the sintered preform and the machine component; positioning the sintered preform on the machine component; and fixedly coupling the sintered preform to at least a portion of the machine component via brazing, such that a diffusion bond is formed between the sintered preform and the machine component, wherein to fixedly couple the sintered preform, the machine component and the sintered preform is heated from room temperature to approximately 1200° F. at a rate of heat addition of approximately 25° F. per minute, and the machine component and the sintered preform are then heated at a holding temperature of approximately 1200° F. for a holding period of approximately 30 minutes.