US4094705A
Expired / Lapsed
US
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Aluminum alloys possessing improved resistance weldability
Assignee: Rio Tinto Switzerland AG
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Filing: 1977-03-28
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Granted: 1978-06-13
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Expires: 1997-03-28
Abstract
Abstract Aluminum alloys exhibiting improved resistance weldability as well as excellent strength and formability characteristics are prepared which comprise 1.-5.% magnesium, 0.3-1.0% lithium, up to 1.0% manganese, up to 0.3% titanium, up to 0.20% vanadium, and balance essentially aluminum. The alloys of the present invention are particularly suited for automotive and like metal parts.
Inventors
- 👤 Philip R. Sperry
- 👤 Frank N. Mandigo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:16
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; C22F1/047; C22C; C22C21/00; C22C21/06
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
62 words
An aluminum base alloy having improved resistance weldability plus excellent strength and formability, consisting essentially of 1.0 to 5.0% magnesium, 0.3-1.0% lithium, up to 1% manganese, up to 0.3% titanium, up to 0.20% vanadium, and balance aluminum, wherein said lithium is substantially retained in solid solution, said alloy being capable of withstanding elevated temperature without undue loss of strength and formability properties.
Claim 2
Dependent Claim
62 words
An aluminum base alloy having improved resistance weldability plus excellent strength and formability, consisting essentially of 1.0 to 5.0% magnesium, 0.3-1.0% lithium, up to 1% manganese, up to 0.3% titanium, up to 0.20% vanadium, and balance aluminum, wherein said lithium is substantially retained in solid solution, said alloy being capable of withstanding elevated temperature without undue loss of strength and formability properties.
Claim 3
Dependent Claim
29 words
The alloy of claim 1 wherein up to 0.4% copper, up to 0.4% chromium, up to 0.3% zinc, up to 0.15% zirconium, and up to 0.3% nickel are present.
Claim 4
Dependent Claim
33 words
The alloy of claim 1 wherein said alloy consists essentially of 2.0 to 4.0% magnesium, 0.4 to 0.8% lithium, 0.1to 0.7% manganese, up to 0.2% titanium, up to 0.15% vanadium, and balance aluminum.
Claim 5
Dependent Claim
29 words
The alloy of claim 3 wherein 0.05 to 0.2% copper, up to 0.4% chromium, up to 0.3% nickel, up to 0.3% zinc, and up to 0.15% zirconium are present.
Claim 6
Dependent Claim
26 words
The alloy of claim 1 wherein up to about 0.45% of an element selected from the group consisting of iron, silicon, and mixtures thereof is present.
Claim 7
Dependent Claim
20 words
The alloy of claim 3 wherein as optional elements 0.05 to 0.15% vanadium, and 0.1 to 0.2% titanium are present.
Claim 8
Dependent Claim
20 words
The alloy of claim 1 consisting essentially of about 2.5% magnesium, 0.6% lithium, 0.5% manganese, 0.15% titanium, and balance aluminum.
Claim 9
Dependent Claim
13 words
The alloy of claim 1 wherein said alloy is in the annealed condition.
Claim 10
Dependent Claim
16 words
The alloy of claim 1 wherein said alloy is in the annealed and cold worked condition.
Claim 11
Dependent Claim
70 words
A wrought article having improved resistance weldability plus excellent strength and formability prepared from an aluminum base alloy consisting essentially of 1.0 to 5.0% magnesium, 0.3 to 1.0% lithium, up to 1% manganese, up to 0.3% titanium, and up to 0.20% vanadium, and balance aluminum, wherein said lithium is substantially retained in solid solution, said alloy being capable of withstanding elevated temperature without undue loss of strength and formability properties.
Claim 12
Dependent Claim
70 words
A wrought article having improved resistance weldability plus excellent strength and formability prepared from an aluminum base alloy consisting essentially of 1.0 to 5.0% magnesium, 0.3 to 1.0% lithium, up to 1% manganese, up to 0.3% titanium, and up to 0.20% vanadium, and balance aluminum, wherein said lithium is substantially retained in solid solution, said alloy being capable of withstanding elevated temperature without undue loss of strength and formability properties.
Claim 13
Dependent Claim
29 words
The article of claim 10, wherein up to 0.4% copper, up to 0.4% chromium, up to 0.3% zinc, up to 0.15% zirconium, and up to 0.3% nickel are present.
Claim 14
Dependent Claim
36 words
The article of claim 10 wherein said alloy consists essentially of from about 2.0 to 4.0% magnesium, 0.4 to 0.8% lithium, 0.1 to 0.7% manganese, up to 0.2% titanium, up to 0.15% vanadium, and balance aluminum.
Claim 15
Dependent Claim
29 words
The article of claim 12 wherein 0.05 to 0.2% copper, 0.1 to 0.4% chromium, up to 0.3% nickel, up to 0.3% zinc, and up to 0.15% zirconium are present.
Claim 16
Dependent Claim
23 words
The article of claim 12 wherein said alloy consists essentially of about 2.5% magnesium, 0.6% lithium, 0.5% manganese, 0.15% titanium, and balance aluminum.
Claim 17
Dependent Claim
13 words
The article of claim 10 wherein said article is in the annealed condition.
Claim 18
Dependent Claim
16 words
The article of claim 10 wherein said alloy is in the annealed and cold worked condition.
Claim 19
Independent Claim
111 words
A method for the preparation of wrought products exhibiting improved resistance weldability plus excellent strength and formability, wherein said alloy is capable of withstanding elevated temperature without undue loss of strength and formability properties which comprises: A. providing an aluminum base alloy consisting essentially of 1.0 to 5.0% magnesium, 0.3 to 1.0% lithium, up to 1% manganese, up to 0.3% titanium, up to 0.20% vanadium, and balance aluminum; B. casting said alloy; C. heating said alloy to a homogenizing temperature and thereafter homogenizing said alloy; D. hot and cold working said alloy; and E. annealing said alloy whereby said wrought products are capable of plastic deformation to form automotive body parts.
Claim 20
Independent Claim
111 words
A method for the preparation of wrought products exhibiting improved resistance weldability plus excellent strength and formability, wherein said alloy is capable of withstanding elevated temperature without undue loss of strength and formability properties which comprises: A. providing an aluminum base alloy consisting essentially of 1.0 to 5.0% magnesium, 0.3 to 1.0% lithium, up to 1% manganese, up to 0.3% titanium, up to 0.20% vanadium, and balance aluminum; B. casting said alloy; C. heating said alloy to a homogenizing temperature and thereafter homogenizing said alloy; D. hot and cold working said alloy; and E. annealing said alloy whereby said wrought products are capable of plastic deformation to form automotive body parts.
Claim 21
Dependent Claim
34 words
The method of claim 17 wherein said alloy consists essentially of 2.0 to 4.0% magnesium, 0.4 to 0.8% lithium, 0.1 to 0.7% manganese, up to 0.15% vanadium, up to 0.2% titanium, and balance aluminum.
Claim 22
Dependent Claim
15 words
The method of claim 17 where said alloy is cast by the DC casting method.
Claim 23
Dependent Claim
18 words
The method of claim 17 wherein said hot working is commenced at a temperature of about 850° F.
Claim 24
Dependent Claim
15 words
The method of claim 17 wherein said alloy is hot and cold worked by rolling.
Claim 25
Dependent Claim
43 words
The method of claim 17 wherein the heating of Step C is conducted at a rate of 50° F per hour to a homogenizing temperature of about 900° F, and said alloy is then held at said homogenizing temperature for about 4 hours.
Claim 26
Dependent Claim
36 words
The method of claim 17 wherein said alloy is annealed by heating at a rate of 50° F per hour from 300° to 650° F, and is then held at 650° F for about 3 hours.
References Cited (Backward Citations)
US3582406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |