Alloy powder mixture for brazing of superalloy articles

Patent · Tue Aug 31 00:00:00 EDT 1993

OSTI ID:6101625

Budinger, D E; Ferrigno, S J; Murphy, W H

An improved braze material is described for brazing at least one superalloy substrate comprising: a high melt component having at least one metallic powder consisting essentially of, by weight, about 4 to 18.5 percent cobalt, about 4.5 to 14 percent chromium, about 3 to 6.2 percent aluminum, 0 to about 5 percent titanium, 0 to about to 4 percent molybdenum, about 3.8 to 13.7 percent tantalum, about 4 to 11 percent tungsten, 0 to about 0.5 percent niobium, 0 to about 12 percent rhenium, 0 to about 1.55 percent hafnium, 0 to about 0.3 percent yttrium, boron and silicon only as impurities, with the balance being nickel and other incidental impurities; and a low melt component having at least one metallic powder consisting essentially of, by weight, about 3.9 to 25 percent cobalt, about 4.6 to 22 percent chromium, 0 to about 12.2 percent aluminum, 0 to about 11.5 percent titanium, 0 to about 2 percent molybdenum, 0 to about 5.4 percent tantalum, 0 to about 7 percent tungsten, 0 to about 3 percent niobium, 0 to about 1.5 percent rhenium, 0 to about 1.1 percent hafnium, 0 to about 10 percent silicon, 0 to about 2.3 percent boron, wherein the total amount of silicon plus boron is at least 0.5 percent, with the balance being nickel and incidental impurities; wherein the high melt component and the low melt component together comprise a bulk composition range consisting essentially of, by weight, about 3 to 13.5 percent cobalt, about 2.8 to 15 percent chromium, about 3 to 7.5 percent aluminum, 0 to about 5 percent titanium, 0 to about 2.5 percent molybdenum, about 2.5 to 6.9 percent tantalum, about 3 to 8 percent tungsten, 0 to about 1.5 percent niobium, 0 to about 6 percent rhenium, 0 to about 1.5 percent hafnium, 0 to about 2.2 percent silicon, 0 to about 1 percent boron, with the balance being nickel and impurities; wherein the bulk composition range comprises less than about 2.2 total weight percent of elements selected from boron and silicon.

• Assignee: General Electric Co., Cincinnati, OH (United States)
• Patent Number(s): US 5240491; A
• Application Number: PPN: US 7-726495
• OSTI ID: 6101625
• Resource Relation: Patent File Date: 8 Jul 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BRAZING ALLOYS
HEAT RESISTING ALLOYS
BRAZING
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
COBALT ALLOYS
HAFNIUM ALLOYS
IMPURITIES
MIXTURES
MOLYBDENUM ALLOYS
NIOBIUM ADDITIONS
POWDERS
RHENIUM ALLOYS
TANTALUM ALLOYS
TITANIUM ALLOYS
TUNGSTEN ALLOYS
YTTRIUM ADDITIONS
ALLOYS
DISPERSIONS
FABRICATION
HEAT RESISTANT MATERIALS
JOINING
MATERIALS
NIOBIUM ALLOYS
WELDING
YTTRIUM ALLOYS
360101* - Metals & Alloys- Preparation & Fabrication