Patent ID: 6084196
Filing Date: 2000-07-04
Classification: B23K,B23P,F01D

Abstract:
A method for welding a nickel-base superalloy article, comprising the steps offurnishing a nickel-base superalloy article, the superalloy article having a composition operable to produce at least about 40 volume percent gamma prime phase dispersed in a gamma phase matrix upon aging;providing a plasma-transferred arc welder, the plasma-transferred arc welder comprising a welding torch includingan electrode operable to strike a plasma arc to the article,a source of an inert gas shield around the plasma arc, anda source of a filler metal disposed to add the filler metal into the plasma arc;heating the article to a welding temperature of from about 1650.degree. F. to about 2000.degree. F.; andapplying a weld overlay of the filler metal to a portion of the article using the plasma-transferred arc welder, concurrently with the step of heating and while the article is at the welding temperature.