Magnetic nickel base ternary brazing material and method of application
AssigneeGeneral Electric Company
InventorsYan CUI, Dechao LIN, Srikanth Chandrudu KOTTILINGAM, Brian Lee TOLLISON
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Abstract
A ternary magnetic braze alloy and method for applying the braze alloy in areas having limited access. The magnetic braze alloy is a nickel-based braze alloy from the perminvar region of the Ni, Fe, Co phase diagram. The braze alloy includes, by weight percent 8-45% Fe, 0-78% Co, 2.0-4.0% of an element selected from the group consisting of B and Si and combinations thereof, and the balance Ni. The nickel-based braze alloy is characterized by a brazing temperature in the range of 1850-2100° F. The nickel-based braze alloy is magnetic below its Curie temperature.
Claims22
A ternary braze alloy, comprising:
- a nickel-based braze alloy from the perminvar region of the nickel (Ni), iron (Fe), cobalt (Co) phase diagram, the braze alloy comprising, by weight percent
- about 8-45% Fe,
- 0 to about 78% Co,
- about 0.5-5.0% of an element selected from the group consisting of boron (B) and silicon (Si) and combinations thereof;
- the balance Ni,
- wherein the nickel-based braze alloy is characterized by a brazing temperature in the range of 1850-2100° F., and
- wherein the nickel-based braze alloy is magnetic below its Curie temperature.
A method for repairing a defect in a structure, comprising the steps of:
- identifying a defect in a component, the defect being positioned in a hard to access location;
- providing a nickel-based braze alloy from the perminvar region of the Ni, Fe, Co phase diagram, the braze alloy including, by weight percent
- about 8-45% Fe,
- about 0-78% Co.
- about 2.0-4.0% of an element selected from the group consisting of B and Si and combinations thereof;
- the balance Ni,
- wherein the nickel-based braze alloy is characterized by a brazing temperature in the range of 1850-2100° F., and
- wherein the nickel-based braze alloy is magnetic below its Curie temperature;
- adding the braze alloy to an interior of the component;
- manipulating the braze alloy with a magnet so that it is positioned within the component at the defect;
- placing the component in a furnace having a non-oxidizing atmosphere while maintaining the braze alloy in position;
- heating the furnace to the brazing temperature of the braze alloy, wherein the braze alloy flows into the defect;
- and
- cooling the component.
Dependencies are inferred from the claim text.