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US 7,601,232 B2Granted
α-β titanium alloy tubes and methods of flowforming the same
AssigneeDynamic Flowform Corp.
InventorsMatthew V. Fonte, John F. Heymans, George L. Durfee
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Abstract
Described herein are methods for forming titanium alloy tubes having an α-β grain structure. The methods include the steps of hot-working a titanium alloy workpiece at a temperature below the β-transus temperature of the workpiece and above the recrystallization temperature of the workpiece to produce an α-β titanium alloy preform hollow. Subsequently, the α-β titanium alloy preform hollow is flowformed, thereby forming a α-β titanium alloy tube.
Claims39
A method of manufacturing an α-β titanium alloy tube, the method comprising the steps of:
- a) producing an α-β titanium alloy preform hollow by hot-working a titanium alloy workpiece at a temperature below the β-transus temperature of the workpiece and above the recrystallization temperature of the workpiece so that the preform hollow is at least 10% by volume alpha phase titanium;
- and
- b) flowforming the preform hollow at a temperature below the recrystallization temperature of the hollow, thereby forming an α-β titanium alloy tube.
Dependencies are inferred from the claim text.