Processing of α/β titanium alloys
First Claim
Patent Images
1. A process comprising:
- cold drawing an α
+β
titanium alloy workpiece at a temperature in the range of ambient temperature to 500°
F.; and
direct aging the cold drawn α
+β
titanium alloy workpiece at a temperature in the range of 700°
F. to 1200°
F.;
the α
+β
titanium alloy comprising, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, from 0.10 to 0.30 oxygen, titanium, and incidental impuritieswherein the cold drawing and direct aging forms an α
+β
titanium alloy article having an ultimate tensile strength in the range of 155 ksi to 200 ksi and an elongation in the range of 8% to 20%, at ambient temperature, and wherein the α
+β
titanium alloy article is selected from the group consisting of a billet, a bar, a rod, a tube, a slab, a plate, and a fastener.
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Abstract
Processes for forming an article from an α+β titanium alloy are disclosed. The α+β titanium alloy includes, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, and from 0.10 to 0.30 oxygen. The α+β titanium alloy is cold worked at a temperature in the range of ambient temperature to 500° F., and then aged at a temperature in the range of 700° F. to 1200° F.
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Citations
17 Claims
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1. A process comprising:
-
cold drawing an α
+β
titanium alloy workpiece at a temperature in the range of ambient temperature to 500°
F.; anddirect aging the cold drawn α
+β
titanium alloy workpiece at a temperature in the range of 700°
F. to 1200°
F.;the α
+β
titanium alloy comprising, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, from 0.10 to 0.30 oxygen, titanium, and incidental impuritieswherein the cold drawing and direct aging forms an α
+β
titanium alloy article having an ultimate tensile strength in the range of 155 ksi to 200 ksi and an elongation in the range of 8% to 20%, at ambient temperature, and wherein the α
+β
titanium alloy article is selected from the group consisting of a billet, a bar, a rod, a tube, a slab, a plate, and a fastener. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A process comprising:
-
cold working an α
+β
titanium alloy workpiece at a temperature in the range of ambient temperature to 500°
F.; anddirect aging the cold worked α
+β
titanium alloy workpiece at a temperature in the range of 700°
F. to 1200°
F.;the α
+β
titanium alloy comprising, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, from 0.10 to 0.30 oxygen, titanium, and incidental impuritieswherein the cold working and direct aging forms an α
+β
titanium alloy article having an ultimate tensile strength in the range of 155 ksi to 200 ksi and an elongation in the range of 8% to 20%, at ambient temperature, and wherein the α
+β
titanium alloy article is selected from the group consisting of a billet, a bar, a rod, a tube, a slab, a plate, and a fastener. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A process comprising:
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hot working an α
+β
titanium alloy workpiece at a temperature in the range of 1500°
F. to 1775°
F.;annealing the α
+β
titanium alloy at a temperature in the range of 1200°
F. to 1500°
F.;cold working the α
+β
titanium alloy workpiece at ambient temperature to a 20% to 60% reduction in area; anddirect aging the cold worked α
+β
titanium alloy workpiece at a temperature in the range of 800°
F. to 1100°
F.;the α
+β
titanium alloy comprising, in weight percentages, from 2.90 to 5.00 aluminum, from 2.00 to 3.00 vanadium, from 0.40 to 2.00 iron, from 0.10 to 0.30 oxygen, titanium, and incidental impuritieswherein the cold working and direct aging forms an α
+β
titanium alloy article having an ultimate tensile strength in the range of 155 ksi to 200 ksi and an elongation in the range of 8% to 20%, at ambient temperature, and wherein the α
+β
titanium alloy article is selected from the group consisting of a billet, a bar, a rod, a tube, a slab, a plate, and a fastener.
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Specification
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Current AssigneeATI Properties LLC (CNH Industrial N.V.)
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Original AssigneeATI Properties LLC (CNH Industrial N.V.)
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InventorsBryan, David J.
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Primary Examiner(s)LEE, REBECCA Y
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Application NumberUS15/005,281Publication NumberTime in Patent Office603 DaysField of SearchUS Class CurrentCPC Class CodesC21D 1/26 Methods of annealingC22C 14/00 Alloys based on titaniumC22F 1/18 High-melting or refractory ...C22F 1/183 of titanium or alloys based...
