Method of producing cold-worked centrifugal cast tubular products
AssigneeATI Properties, Inc.
InventorMatthew V. Fonte
Life of this patent
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Abstract
A method of making a seamless, tubular article comprises subjecting a cast tubular workpiece of a corrosion resistant alloy to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process comprising at least one of radial forging, rolling, pilgering, and flowforming. The cast tubular workpiece is a centrifugally cast tubular workpiece comprising an inner diameter and an outer diameter.
Claims24
A method of making a seamless, tubular article, the method comprising:
- subjecting a cast tubular workpiece of a corrosion resistant alloy to at least a 35% wall reduction including at least two reductions at a temperature below a recrystallization temperature of the workpiece using a metal forming process comprising at least one of radial forging, rolling, pilgering, and flowforming, and wherein a first reduction applied to the cast tubular workpiece is at least a 25% wall reduction;
- wherein the cast tubular workpiece is a centrifugally cast tubular workpiece comprising an inner diameter and an outer diameter.
A method of making a seamless tubular article from a centrifugally cast, corrosion resistant alloy, the method comprising:
- cold working a cast tubular workpiece comprising an inner diameter, an outer diameter, and a wall thickness by at least one of flowforming, radial forging, rolling, and pilgering to provide a wall reduction, wherein the cold working includes at least two wall reductions, and wherein a first wall reduction applied to the cast tubular workpiece is at least a 25% wall reduction;
- wherein the cast tubular workpiece is a centrifugally cast, tubular workpiece of a corrosion resistant alloy;
- and
- wherein the corrosion resistant alloy is selected from a stainless steel alloy, a titanium-based alloy, a nickel-based alloy, and a zirconium-based alloy.
A method of producing a seamless, tubular product, the method comprising:
- subjecting a centrifugally cast tubular workpiece of a duplex stainless steel to a at least two wall reductions, and wherein a first wall reduction applied to the centrifugally cast workpiece is at least a 25% wall reduction, at a temperature below a recrystallization temperature of the duplex stainless steel using a metal forming process comprising rolling, wherein the centrifugally cast tubular workpiece includes an inner diameter and an outer diameter, and wherein material has been removed from the inner diameter.
Dependencies are inferred from the claim text.