Enhanced weldability for high strength cast and wrought nickel superalloys
AssigneeUnited Technologies Corporation
InventorDavid R. Malley
Life of this patent
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Abstract
A method for repairing a turbine engine component comprises the steps of providing a turbine engine component formed from a nickel-based superalloy, removing any defects from the turbine engine component, the removing step comprising subjecting the turbine engine component to a solutioning heat treatment using a heating rate in the range of from 29 degrees Fahrenheit/minute to approximately 40 degrees Fahrenheit/minute as the component passes through a temperature in the range of from 1100 degrees Fahrenheit to 1600 degrees Fahrenheit, and welding the turbine engine component to effect the repair. A deliberately slow post-solution treatment cooling rate is used to substantially prevent weld cracks.
Claims21
A method for repairing a turbine engine component comprising the steps of:
- providing a turbine engine component formed from a nickel-based superalloy;
- removing any defects from said turbine engine component;
- said removing step comprising subjecting said turbine engine component to a solutioning heat treatment using a heating rate in the range of from 29 degrees Fahrenheit/minute to approximately 40 degrees Fahrenheit/minute as the component passes through a temperature in the range of from 1100 degrees Fahrenheit to 1600 degrees Fahrenheit;
- and
- welding said turbine engine component to effect said repair,
- wherein said solutioning step comprises maintaining said turbine engine component at a temperature in the range of from 1100 to 1600 degrees Fahrenheit for a time period not greater than 17 minutes.
A method for repairing a turbine engine component comprising the steps of:
- providing a turbine engine component formed from a nickel-based superalloy;
- removing any defects from said turbine engine component;
- said removing step comprising subjecting said turbine engine component to a solutioning heat treatment using a heating rate in the range of from 29 degrees Fahrenheit/minute to approximately 40 degrees Fahrenheit/minute as the component passes through a temperature in the range of from 1100 degrees Fahrenheit to 1600 degrees Fahrenheit;
- and
- welding said turbine engine component to effect said repair,
- wherein said solutioning step comprises maintaining said turbine engine component at a temperature in the range of from 1100 to 1600 degrees Fahrenheit for a time period not greater than 13 minutes.
A method for repairing a turbine engine component comprising the steps of:
- providing a turbine engine component formed from a nickel-based superalloy;
- removing any defects from said turbine engine component;
- said removing step comprising subjecting said turbine engine component to a solutioning heat treatment using a heating rate in the range of from 29 degrees Fahrenheit/minute to approximately 40 degrees Fahrenheit/minute as the component passes through a temperature in the range of from 1100 degrees Fahrenheit to 1600 degrees Fahrenheit;
- welding said turbine engine component to effect said repair;
- and
- subjecting said welded turbine engine component to a post weld heat treatment,
- wherein said post weld heat treatment subjecting step comprises subjecting said welded turbine engine component to a post weld heat treatment using a rapid heating rate in the range of from 29 degrees Fahrenheit/minute to approximately 40 degrees Fahrenheit/minute as said welded turbine engine component is in a temperature range of from 1100 to 1600 degrees Fahrenheit.
Dependencies are inferred from the claim text.