Patent US4429022A successfully refreshed from Google Patents.
US4429022A
Expired / Lapsed
US
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Composite material having improved bond strength
Assignee: Olin Corp
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Filing: 1982-06-28
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Granted: 1984-01-31
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Expires: 2002-06-28
Abstract
Abstract A composite material having improved bond strength and a substantially smooth external surface comprises a deoxidized copper alloy core material and a copper-aluminum-silicon clad material. The composite is formed by rolling together the core and clad, preferably in an unheated condition, in a single pass with a reduction of about 50% to 75% to form a metallurgical bond between the core and clad and thereafter enhancing the bond strength by heating the bonded core and cladding to a temperature in the range of about 200° C. to about 750° C. for a time period of about 5 minutes to about 24 hours.
Inventors
- 👤 John F. Breedis
- 👤 Julius C. Fister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:17
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B23; B23K; B23K20/00; B23K20/22; B23K20/233; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/94; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A composite material having improved bond strength and a substantially smooth external surface, said composite material comprising: a core comprising a deoxidized copper base alloy consisting essentially of at least 95% copper and from about 0.05% to about 0.5% zirconium; a cladding comprising a dissimilar copper alloy; and a strong metallurgical bond between said core and cladding, said bond being formed by rolling together said core and cladding in a single pass with a reduction of about 50% to 75% and by heating said bonded core and cladding at a temperature in the range of about 200° C. to about 750° C. for a time period of about 5 minutes to 24 hours to increase the strength of said bond.
Claim 2
Dependent Claim
120 words
A composite material having improved bond strength and a substantially smooth external surface, said composite material comprising: a core comprising a deoxidized copper base alloy consisting essentially of at least 95% copper and from about 0.05% to about 0.5% zirconium; a cladding comprising a dissimilar copper alloy; and a strong metallurgical bond between said core and cladding, said bond being formed by rolling together said core and cladding in a single pass with a reduction of about 50% to 75% and by heating said bonded core and cladding at a temperature in the range of about 200° C. to about 750° C. for a time period of about 5 minutes to 24 hours to increase the strength of said bond.
Claim 3
Dependent Claim
32 words
The composite material of claim 1 wherein said core comprises a low work hardened copper base alloy consisting essentially of from about 0.05% to about 0.15% zirconium and the balance essentially copper.
Claim 4
Dependent Claim
31 words
The composite material of claim 1 wherein said cladding comprises a copper alloy consisting essentially of about 2 to 3.5% aluminum, about 1 to 2.5% silicon and the balance essentially copper.
Claim 5
Dependent Claim
19 words
The composite material of claim 1 further comprising: said core being clad with said cladding on two opposed surfaces.
Claim 6
Dependent Claim
36 words
The composite material of claim 1 further comprising: said core representing 40% to 90% of the thickness of said composite material; and said cladding representing from 10% to 60% of the thickness of said composite material.
Claim 7
Dependent Claim
23 words
The composite material of claim 4 wherein said cladding on each side comprises 5% to 30% of the thickness of said composite material.
Claim 8
Dependent Claim
42 words
The composite material of claim 1 further comprising: said bond being strengthened by heating said bonded core and cladding to a temperature of about 400° C. to about 600° C. for a time period of about 30 minutes to about 1 hour.
Claim 9
Dependent Claim
23 words
The composite material of claim 1 further comprising: said bond being formed by rolling together said core and cladding in an unheated condition.
Claim 10
Dependent Claim
58 words
A composite having improved bond strength, said composite comprising: a core comprising a deoxidized copper base alloy consisting essentially of at least 95% copper and from about 0.05% to about 0.5% zirconium; and a dissimilar copper alloy cladding the composite having a bond strength of at least about 200 pounds per 3/4 inch width to being substantially unpeelable.
Claim 11
Dependent Claim
58 words
A composite having improved bond strength, said composite comprising: a core comprising a deoxidized copper base alloy consisting essentially of at least 95% copper and from about 0.05% to about 0.5% zirconium; and a dissimilar copper alloy cladding the composite having a bond strength of at least about 200 pounds per 3/4 inch width to being substantially unpeelable.
Claim 12
Dependent Claim
26 words
The composite of claim 9 wherein said core comprises a copper alloy consisting essentially of from about 0.05% to about 0.15% zirconium the balance essentially copper.
Claim 13
Dependent Claim
32 words
The composite of claim 9 wherein said cladding comprises a copper alloy consisting essentially of about 2% to about 3.5% aluminum, about 1% to about 2.5% silicon and the balance essentially copper.
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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) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |