Patent ID: 9221101
Filing Date: 2015-12-29
Classification: B22F,B23P,Y10T

Abstract:
1. A process for local repair of a thermomechanical part of a superalloy, comprising: producing a mold in a die of an enclosure for spark plasma sintering (SPS) flash-sintering, the mold being shaped as an impression of at least a repair portion of the part; introducing into the mold a layer of brazing powder and at least one layer of a superalloy-based powder constituting a multilayer whole; then, in a sintering, pressurizing and initiating a passage of pulsed current producing a rapid rise in temperature in accordance with a flash sintering cycle whose temperature, pressure, and duration are regulated, with at least one temperature plateau and one pressure plateau, so that a bond of material with the part can subsequently be produced by diffusion, the sintering producing a preform with composition gradients in the multilayer whole, with a brazing face that can be joined to be in direct contact to the part and a superalloy material appearing on the surface of the preform.