US4142664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining titanium clad steel plates
Assignee: Titanium Fabrication Corp
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Filing: 1977-09-21
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Granted: 1979-03-06
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Expires: 1997-09-21
Abstract
Abstract A method of butt welding titanium-clad steel plates whereby the steel portions of the abutting plates are first welded together, then the portions of the steel plates adjacent to the titanium portions are metallized with a refractory metal coating, which coating is compatible both with the steel layer and with the titanium portions, then titanium is cast into the space between the titanium plates by a known method to complete a butt weld between the titanium clad steel plates, having continuous titanium and steel segments.
Inventors
- 👤 Norman G. Feige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:40
CPC Classifications
B; B23; B23K; B23K31/00; B23K31/02; B23K9/00; B23K9/23
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A method of forming a joint between first and second titanium clad steel members comprised of the following steps: a. Scarfing said members so that the titanium layers are separated from the edges of the steel layers to be joined; b. Aligning said first and second members for welding with their steel portions in substantially abutting relation and their titanium portions separated and elevated therefrom; c. Welding only said abutting steel portions together; d. Metallizing the exposed steel surface and weld from one titanium-clad edge to the other titanium-clad edge with a refractory metal which is compatible with steel and with titanium; e. Filling the space bounded by the edges of the titanium-clad portions and the layer of refractory metal with titanium-bonded to the abutting surfaces while chilling the steel side of the joint; whereby the respective edges of said abutting steel and titanium portions are joined by a smooth full interface bond.
Claim 2
Independent Claim
153 words
A method of forming a joint between first and second titanium clad steel members comprised of the following steps: a. Scarfing said members so that the titanium layers are separated from the edges of the steel layers to be joined; b. Aligning said first and second members for welding with their steel portions in substantially abutting relation and their titanium portions separated and elevated therefrom; c. Welding only said abutting steel portions together; d. Metallizing the exposed steel surface and weld from one titanium-clad edge to the other titanium-clad edge with a refractory metal which is compatible with steel and with titanium; e. Filling the space bounded by the edges of the titanium-clad portions and the layer of refractory metal with titanium-bonded to the abutting surfaces while chilling the steel side of the joint; whereby the respective edges of said abutting steel and titanium portions are joined by a smooth full interface bond.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein said refractory metal is one member selected from the following group: molybdenum, tungsten, and tantalum.
Claim 4
Dependent Claim
13 words
The method of claim 1, wherein the refractory metal is deposited by metallizing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |