Method of welding superalloys
AssigneeGeneral Electric Company
InventorsCem Murat Eminoglu, Yan Cui, Daniel James Dorriety, Brian Lee Tollison, Paul Albert Cook
Life of this patent
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Abstract
A method of welding a superalloy component includes the following sequential steps. A welding step for welding a cavity using a filler metal in an inert atmosphere, where the cavity is located in the component. A covering step for covering the filler metal and a portion of the component with a weld filler layer in the inert atmosphere. The weld filler layer has a greater ductility than material comprising the component and/or material comprising the filler metal. A second covering step for covering the weld filler layer with a braze material, and subsequently performing a brazing operation. A heat treating step heat treats the component.
Claims17
A method of welding a superalloy component, the method comprising the following sequential steps:
- (a) welding a cavity using a filler metal in an inert atmosphere, the cavity located in the component;
- (b) covering the filler metal and a portion of the component with a weld filler layer in the inert atmosphere, the weld filler layer having an approximately 10% greater ductility than material comprising the component and material comprising the filler metal;
- (c) covering the weld filler layer with a braze material, and performing a brazing operation at a temperature of 2100 to 2300 degrees F.;
- and
- (d) heat treating the component with a hot isostatic pressing (HIP) heat treatment, the HIP heat treatment including a stress relief cycle at a temperature approximately 25 degrees F. less than the brazing operation and at a pressure of approximately 15,000 pounds per square inch, followed by a brazing cycle at a temperature of 2050 to 2250 degrees F., followed by a braze diffusion cycle, followed by cooling to an ambient temperature.
A method of welding a superalloy component, the method comprising the following sequential steps:
- (a) welding a cavity using a filler metal in an inert atmosphere, the cavity located in the component;
- (b) covering the filler metal and a portion of the component with a weld filler layer in the inert atmosphere, the weld filler layer having an approximately 10% greater ductility than material comprising the component and material comprising the filler metal;
- (c) covering the weld filler layer with a braze material, and performing a brazing operation at a temperature of 2100 to 2300 degrees F.;
- (d) heat treating the component with a hot isostatic pressing heat (HIP) treatment, the HIP treatment including a stress relief cycle at a temperature approximately 25 degrees F. less than the brazing operation and at a pressure of approximately 15,000 pounds per square inch, followed by a brazing cycle at a temperature of 2050 to 2250 degrees F., followed by a braze diffusion cycle, followed by cooling to an ambient temperature;
- and
- (e) a solution heat treatment step performed after the hot isostatic pressing heat treatment step.
A method of welding a high gamma prime superalloy component, the method comprising the following sequential steps:
- (a) welding a cavity using a filler metal in an inert atmosphere, the inert atmosphere comprising at least one of:
- argon gas, nitrogen gas, helium gas or carbon dioxide gas;
- the cavity located in the component;
- (b) covering the filler metal and a portion of the component with a weld filler layer in the inert atmosphere, the weld filler layer having an approximately 10% greater ductility than material comprising the component and material comprising the filler metal;
- (c) covering the weld filler layer with a braze material, and performing a brazing operation at a temperature of 2100 to 2300 degrees F.;
- and
- (d) heat treating the component with a hot isostatic pressing (HIP) heat treatment, the HIP heat treatment including a stress relief cycle at a temperature approximately 25 degrees F. less than the brazing operation and at a pressure of approximately 15,000 pounds per square inch, followed by a brazing cycle at a temperature of 2050 to 2250 degrees F., followed by a braze diffusion cycle, followed by cooling to an ambient temperature, and then subsequently performing a solution heat treatment at a temperature of 1975 to 2200 F.
Dependencies are inferred from the claim text.