US3579800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of elongated extrusions composed of titanium base metal
Assignee: Technical Metals Inc
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Filing: 1969-01-28
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Granted: 1971-05-25
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Expires: 1989-01-28
Abstract
Abstract Elongated extrusions of titanium base metal are produced from billets in the form of coils of titanium base metal. In such a coil, the rolling direction of the sheet and the axis of the convolutions of the sheet are at right angles to each other. It is believed that striated roughness of the resulting extrusion is minimized because grain elongation in the rolling direction and grain elongation in the extruding (axial) direction are such that strain hardening is neutralized.
Inventors
- 👤 Robert F Packard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
B; B21; B21B; B21B1/00; B21C; B21C23/00; B21C23/01; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12493; Y10T428/12771; Y10T428/12806
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A process for producing an elongated titanium base metal shape, said process comprising the steps of orienting a sheet of said titanium base metal with its elongated grains extending along a first axis, coiling said sheet about a second axis perpendicular to said first axis in order to produce a plurality of convolutions thereof about a core, inserting said convolutions and said core into a can, said core and said can being composed of a second metal having a bulk modulus approximately the same as the bulk modulus of said titanium base metal, evacuating said can and sealing said assemblage at opposite ends thereof, extruding said billet through a die opening at the temperature in excess of 1,200* F. and at a pressure sufficient to effect extrusion, thereby producing an elongated shape having a core and a casing, and chemically removing said core and said casing from the extruded-type titanium shape.
Claim 2
Dependent Claim
14 words
The process of claim 2 wherein said titanium base metal is substantially pure titanium.
Claim 3
Dependent Claim
14 words
The process of claim 2 wherein said titanium base metal is a titanium alloy.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein said titanium base metal is an alloy of aluminum and vanadium.
Claim 5
Dependent Claim
14 words
The process of claim 2 wherein said second metal is composed of mild steel.
Claim 6
Dependent Claim
103 words
A process of producing elongated titanium base metal shapes, said titanium base metal including titanium as its characteristic ingredient, said process comprising the steps of orienting a sheet of said titanium base metal in its rolling direction so that elongated grains are orientated along a first axis, coiling said sheet about a second axis perpendicular to said first axis to provide a plurality of convolutions about said second axis to form an intermediate billet, enclosing said intermediate billet in a can to form a final billet, and extruding said final billet through a die opening at a temperature in excess of 1,200* F.
Claim 7
Dependent Claim
177 words
A process for producing an elongated titanium base metal shape, said process comprising the steps of orienting a sheet of said titanium base metal with its elongated grains extending along a first axis, coiling said sheet about a second axis perpendicular to said first axis in order to produce a plurality of convolutions thereof about a core, inserting said convolutions and said core into a can, said core and said can being composed of a second metal having a bulk modulus approximately the same as the bulk modulus of said titanium base metal, evacuating said can and sealing said assemblage at opposite ends thereof to form a completed billet, extruding said billet through a die opening at a temperature in excess of 1,200* F. and at a pressure sufficient to effect extrusion, thereby producing an elongated shape having a core and a casing, and chemically removing said core and said casing from the extruded-type titanium shape, said titanium base metal being an alloy of aluminum and vanadium, said core and said can being composed of mild steel.
Claim 8
Dependent Claim
30 words
The process of claim 8 wherein said chemically removing of said core and said casing is effected with an acid that is inert with respect to said titanium base metal.
Claim 9
Dependent Claim
12 words
The process of claim 8 wherein said temperature is approximately 1,650* F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |