Patent US4232095A successfully refreshed from Google Patents.
US4232095A
Expired / Lapsed
US
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Filler metal in a welded assembly
Assignee: Rio Tinto Switzerland AG
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Filing: 1979-03-02
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Granted: 1980-11-04
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Expires: 1999-03-02
Abstract
Abstract Filler metal for welding AlZnMg type alloys raises the resistance to stress corrosion without increasing the susceptibility to exfoliation corrosion. The composition of the filler metal includes a copper addition which suppresses weld boundary corrosion while additions of manganese, titanium, chromium and zirconium inhibit weld cracking. High weld strengths are attained using the said filler metal.
Inventors
- 👤 Miroslav Pirner
- 👤 Heinrich Zoller
- 👤 Heinz Bichsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:57
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A filler metal in a welded assembly with aluminum alloys, said filler metal consisting essentially of: zinc from 1.0 to 4.0%; magnesium from 2.0 to 5.0%; copper from 0.2 to 0.5%; manganese from 0.3 to 0.5%; titanium from 0.05 to 0.2%; chromium from 0.05 to 0.3%; zirconium from 0.05 to 0.2%; balance aluminum, said filler metal producing welded aluminum assemblies wherein the weld has the same strength as the parent metal plus has resistance to weld boundary corrosion, weld cracking and stress corrosion without a corresponding increase in susceptibility to exfoliation corrosion in the heat affected zone.
Claim 2
Dependent Claim
97 words
A filler metal in a welded assembly with aluminum alloys, said filler metal consisting essentially of: zinc from 1.0 to 4.0%; magnesium from 2.0 to 5.0%; copper from 0.2 to 0.5%; manganese from 0.3 to 0.5%; titanium from 0.05 to 0.2%; chromium from 0.05 to 0.3%; zirconium from 0.05 to 0.2%; balance aluminum, said filler metal producing welded aluminum assemblies wherein the weld has the same strength as the parent metal plus has resistance to weld boundary corrosion, weld cracking and stress corrosion without a corresponding increase in susceptibility to exfoliation corrosion in the heat affected zone.
Claim 3
Dependent Claim
17 words
A filler metal according to claim 1 containing less than 0.3% silicon and less than 0.4% iron.
Claim 4
Dependent Claim
16 words
A filler metal according to claim 2 wherein the zinc content lies between 2.7 and 3.3%.
Claim 5
Dependent Claim
16 words
A filler metal according to claim 2 wherein the magnesium content lies between 3.7 and 4.3%.
Claim 6
Dependent Claim
17 words
A filler metal according to claim 2 in which the copper content lies between 0.25 and 0.35%.
Claim 7
Dependent Claim
17 words
A filler metal according to claim 2 in which the manganese content lies between 0.35 and 0.45%.
Claim 8
Dependent Claim
17 words
A filler metal according to claim 2 in which the titanium content lies between 0.08 and 0.15%.
Claim 9
Dependent Claim
17 words
A filler metal according to claim 2 in which the chromium content lies between 0.12 and 0.20%.
Claim 10
Dependent Claim
17 words
A filler metal according to claim 2 in which the zirconium content lies between 0.12 and 0.20%.
Claim 11
Dependent Claim
62 words
A filler metal according to claim 1 for welding aluminum alloys of the AlZnMg type consisting of: zinc from 2.7 to 3.3%; magnesium from 3.7 to 4.3%; copper from 0.25 to 0.35%; manganese from 0.35 to 0.45%; titanium from 0.08 to 0.15%; chromium from 0.12 to 0.20%; zirconium from 0.12 to 0.20%; silicon less than 0.2%; iron less than 0.3%; balance aluminum.
References Cited (Backward Citations)
US2245167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |