System and method of producing autofrettage in tubular components using a flowforming process
AssigneeATI Properties, Inc.
InventorMatthew V. Fonte
Life of this patent
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Abstract
A method of producing autofrettage in a tubular component provides a tubular workpiece having an inner diameter and an outer diameter and provides at least two rollers having a displacement from one another in an axial direction with respect to the workpiece. The method places the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel. The method also compresses the outer diameter of the workpiece with the rollers at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress to the inner diameter of the workpiece.
Claims17
A method of producing autofrettage in a tubular component, the method comprising:
- providing a tubular workpiece having an inner diameter and an outer diameter, wherein the workpiece includes at least one of a nickel-based superalloy, a cobalt-based superalloy, and an iron-based superalloy;
- providing at least two rollers having a displacement from one another in an axial direction with respect to the workpiece;
- placing the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel;
- and
- compressing the outer diameter of the workpiece with the rollers at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress of at least 500 MPa to the inner diameter of the workpiece.
A method of producing a superalloy tubular component, the method comprising:
- providing a tubular workpiece having an inner diameter and an outer diameter, the workpiece made of a superalloy material comprising at least one of a nickel-based superalloy, a cobalt-based superalloy, and an iron-based superalloy;
- placing the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel;
- and
- compressing the outer diameter of the workpiece at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress of at least 500 MPa to the inner diameter of the workpiece.
A method of producing a superalloy gun barrel, the method comprising:
- providing a tubular workpiece having an inner diameter and an outer diameter, wherein the inner diameter is about one inch or less and the workpiece is made of a superalloy material comprising at least one of a nickel-based superalloy, a cobalt-based superalloy, and an iron-based superalloy;
- placing the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel;
- and
- compressing the outer diameter of the workpiece at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress of at least 500 MPa to the inner diameter of the workpiece.
Dependencies are inferred from the claim text.