US4599119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Age-hardening copper titanium alloy
Assignee: NGK Insulators Ltd
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Filing: 1984-11-13
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Granted: 1986-07-08
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Expires: 2004-11-13
Abstract
Abstract An age-hardening copper titanium alloy containing 2 to 6% by weight of titanium, and composed of a substantially fully solution heat-treated structure having an average crystal grain size not exceeding 25 microns. When the alloy is cold-rolled after its solution heat treatment, its elongation in the rolling direction and that in a direction perpendicular thereto have a difference of within 20% therebetween, and its bend radius to thickness ratios in those two directions are substantially equal to each other.
Inventors
- 👤 Kazuo Ikushima
- 👤 Yoshio Itoh
- 👤 Toshiaki Ishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:01
CPC Classifications
C; C22; C22C; C22C9/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
An age-hardened copper titanium alloy comprising a substantially fully solution heat-treated structure including 2 to 6% by weight of titanium and the remainder being copper, and having an average crystal grain size of not greater than 25 microns, said copper titanium alloy being produced by casting a copper titanium alloy melt, working the cast alloy at least in a hot condition, annealing the worked alloy, and subjecting the annealed alloy to a solution heat treatment, said annealing occurring at a temperature of 500° C. to 700° C. for a time period of one to twenty hours, wherein elongation of said alloy in a rolling direction as compared with elongation in a direction perpendicular to said rolling direction having a difference of with 20%, and a bend formability of said alloy in said rolling direction as compared with a bend formability in said perpendicular direction are substantially equal to each other.
Claim 2
Dependent Claim
150 words
An age-hardened copper titanium alloy comprising a substantially fully solution heat-treated structure including 2 to 6% by weight of titanium and the remainder being copper, and having an average crystal grain size of not greater than 25 microns, said copper titanium alloy being produced by casting a copper titanium alloy melt, working the cast alloy at least in a hot condition, annealing the worked alloy, and subjecting the annealed alloy to a solution heat treatment, said annealing occurring at a temperature of 500° C. to 700° C. for a time period of one to twenty hours, wherein elongation of said alloy in a rolling direction as compared with elongation in a direction perpendicular to said rolling direction having a difference of with 20%, and a bend formability of said alloy in said rolling direction as compared with a bend formability in said perpendicular direction are substantially equal to each other.
Claim 3
Dependent Claim
19 words
The alloy as set forth in claim 1, wherein said alloy contains 3 to 5% by weight of titanium.
Claim 4
Dependent Claim
20 words
The alloy as set forth in claim 1, wherein said average crystal grain size is 3 microns to 15 microns.
Claim 5
Dependent Claim
40 words
The alloy as set forth in claim 1, wherein said alloy further includes at least one element selected from the group consisting of iron, zirconium, chromium, boron and silicon, in addition to said titanium, the remainder consisting essentially of copper.
Claim 6
Dependent Claim
115 words
An age-hardened copper titanium alloy comprising a substantially fully solution heat-treated structure including 2 to 6% by weight of titanium and at least one element selected from the group consisting of iron, zirconium, chromium, boron and silicon and the remainder consisting essentially of copper, said copper titanium alloy having an average crystal grain size of not greater than 25 microns, and being produced by casting a copper titanium alloy melt, working the cast alloy at least in a hot condition, annealing the worked alloy, and subjecting the annealed alloy to a solution heat treatment, said annealing occurring at a temperature of 500° C. to 700° C. for a time period of one to twenty hours.
Claim 7
Dependent Claim
115 words
An age-hardened copper titanium alloy comprising a substantially fully solution heat-treated structure including 2 to 6% by weight of titanium and at least one element selected from the group consisting of iron, zirconium, chromium, boron and silicon and the remainder consisting essentially of copper, said copper titanium alloy having an average crystal grain size of not greater than 25 microns, and being produced by casting a copper titanium alloy melt, working the cast alloy at least in a hot condition, annealing the worked alloy, and subjecting the annealed alloy to a solution heat treatment, said annealing occurring at a temperature of 500° C. to 700° C. for a time period of one to twenty hours.
Claim 8
Dependent Claim
26 words
The alloy as set forth in claim 5, wherein said iron, zirconium, chromium, boron and silicon do not exceed 2% by weight in a total amount.
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) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |