Patent ID: 9527162
Filing Date: 2016-12-27
CPC Classification: B22F,B23K,B23P,B33Y,C22C,Y02P

Claim Text:
1. A method of repair additive build up of a nickel (Ni) base superalloy with significant titanium (Ti) and aluminum (Al) content comprising: a) preplacing a Ni base superalloy powder having significant Ti and Al content onto a substrate of the same composition as the Ni base superalloy powder; b) preheating the preplaced powder to a temperature above 1200 deg. C. with a first heat source; c) melting the preplaced powder with one or more passes of a directed energy beam second heat source so as to produce a heat affected zone having a width less than 100 microns, removing the second heat source when melting is completed; d) performing a controlled step and hold cooling of the melted preplaced powder with the first heat source such that no more than 20 weight percent of γ′ phase is formed during the step and hold cooling.