Surface oxide weld penetration enhancement method and article

Details Surface oxide weld penetration enhancement method and article Surface oxide weld penetration enhancement method and article

2005-08-09

2005-08-09

Elve, M. Alexandra (Department: 1725)

Electric heating

Metal heating

By arc

C219S13700R

Reexamination Certificate

active

06927361

ABSTRACT:
A method for welding iron-based or nickel-based superalloy assemblies into a unitary article. First, the assemblies are heated in an air atmosphere, at a rate suitable to minimize geometric distortion, to a temperature in the range of about 1400F (760C) to about 2000° F. (1090° C.) to form an oxide layer on the surface of the assemblies and optionally as a pre-weld solution heat treat. The temperature of the assemblies are then held in a range of about 1400F (760C) to about 2000° F. (1090° C.) for a time sufficient to form an oxide layer of sufficient thickness on the surface of the assemblies and optionally to solution the assemblies. The assemblies are then cooled to ambient temperature at a rate sufficient to avoid precipitation of unwanted metal phases at a rate sufficient to maintain dimensional stability. The oxide layer is then removed from at least the faying surfaces of the assemblies, but not from the face side of the assemblies. The faying surfaces of the assemblies are then cleaned. The assemblies are then welded using a GTA welding procedure to form a unitary article. The article is then resolutioned at an appropriate temperature for an appropriate period of time, both of which are dependent on the type of superalloy(s) that is present in the welded article and the desired properties. The article is then optionally age heat treated at an appropriate temperature for an appropriate period of time, both of which are dependent on the type of superalloy(s) that is present in the welded unitary article.

REFERENCES:
patent: 2498275 (1950-02-01), Johnson
patent: 3617685 (1971-11-01), Brill-Edwards et al.
patent: 4176433 (1979-12-01), Lee et al.
patent: 4205118 (1980-05-01), Schubert
patent: 4288677 (1981-09-01), Sakata et al.
patent: 4611744 (1986-09-01), Fraser et al.
patent: 4726104 (1988-02-01), Foster et al.
patent: 5320879 (1994-06-01), Bullock
patent: 5813118 (1998-09-01), Roedl et al.
patent: 5897801 (1999-04-01), Smashey et al.
patent: 5972424 (1999-10-01), Draghi et al.
patent: 6054687 (2000-04-01), Conner et al.
patent: 6077615 (2000-06-01), Yada et al.
patent: 6124568 (2000-09-01), Broderick et al.
patent: 6154959 (2000-12-01), Goodwater et al.
patent: 6173491 (2001-01-01), Goodwater et al.
patent: 6233822 (2001-05-01), Grossklaus, Jr. et al.
patent: 6465755 (2002-10-01), Hughes et al.
patent: 6489583 (2002-12-01), Feng et al.
patent: 6610962 (2003-08-01), Warren et al.
patent: 1 016 487 (2000-07-01), None
patent: 1 110 658 (2001-06-01), None
patent: WO 01/41970 (2001-06-01), None

Affiliated with

Also associated with

Rating

Surface oxide weld penetration enhancement method and article does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Surface oxide weld penetration enhancement method and article, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface oxide weld penetration enhancement method and article will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3485342