US4069358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cladding heavy gage plate
Assignee: Olin Corp
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Filing: 1976-01-28
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Granted: 1978-01-17
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Expires: 1996-01-28
Abstract
Abstract A method of cladding metal plate with a protective layer of copper or copper base alloy is disclosed. The metal plate is contacted with a standing waveform of molten copper or copper base alloy in order to provide the cladding layer. This clad composite material is used to provide corrosion resistance for the metal plate substrate and an inexpensive alternative to solid thick sheets of copper or copper base alloy to deter corrosion.
Inventors
- 👤 Joseph Winter
- 👤 Derek E. Tyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:07
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
193 words
A method of cladding plate comprising the steps of: a. providing a clean, smooth metal substrate in plate form having a thickness of from 1/8 to 2 inches selected from the group consisting of iron and iron alloys; b. heating the plate to a temperature between 200° and 1000° C; c. providing a bath of molten metal cladding material selected from the group consisting of copper and copper base alloys at a temperature above that of the heated substrate plate, wherein the temperature of said metal cladding material ranges from 1100° to 1400° C; d. forming a standing wave of the molten metal in the bath; e. contacting at least one surface of the heated substrate plate with the top portion of the standing wave of molten cladding material in at least one pass through the contacting station to form a composite clad plate wherein the cladding thickness ranges from 0.01 to 0.5 inch, wherein the substrate plate contacts the standing wave of cladding material at a speed ranging from 2 to 40 inches per minute; and f. removing the composite clad plate from the contacting station, to be subsequently formed if desired.
Claim 2
Independent Claim
193 words
A method of cladding plate comprising the steps of: a. providing a clean, smooth metal substrate in plate form having a thickness of from 1/8 to 2 inches selected from the group consisting of iron and iron alloys; b. heating the plate to a temperature between 200° and 1000° C; c. providing a bath of molten metal cladding material selected from the group consisting of copper and copper base alloys at a temperature above that of the heated substrate plate, wherein the temperature of said metal cladding material ranges from 1100° to 1400° C; d. forming a standing wave of the molten metal in the bath; e. contacting at least one surface of the heated substrate plate with the top portion of the standing wave of molten cladding material in at least one pass through the contacting station to form a composite clad plate wherein the cladding thickness ranges from 0.01 to 0.5 inch, wherein the substrate plate contacts the standing wave of cladding material at a speed ranging from 2 to 40 inches per minute; and f. removing the composite clad plate from the contacting station, to be subsequently formed if desired.
Claim 3
Dependent Claim
26 words
A process as in claim 1 wherein the substrate metal is selected from the group consisting of structural and drawing grades of hot rolled steel plate.
Claim 4
Dependent Claim
14 words
A process as in claim 1 wherein the cladding material is a copper-nickel alloy.
Claim 5
Dependent Claim
25 words
A process as in claim 1 wherein the substrate plate, before contacting the molten cladding material, is surrounded by a protective atmosphere of inert gas.
Claim 6
Dependent Claim
36 words
A process as in claim 1 wherein the substrate plate is passed through a surface treatment station to further clean the plate and remove any oxidation or other irregularities on the plate surface before being heated.
Claim 7
Dependent Claim
20 words
A process as in claim 1 wherein the substrate plate is heated to a temperature between 600° and 800° C.
Claim 8
Dependent Claim
20 words
A process as in claim 1 wherein the temperature of the molten cladding material ranges from 1100° to 1250° C.
Claim 9
Dependent Claim
31 words
A process as in claim 1 wherein the standing wave of molten cladding material is formed by the application of pressure over at least a portion of the molten metal surface.
Claim 10
Dependent Claim
28 words
A process as in claim 1 wherein the substrate plate contacts the standing wave of cladding material at a speed ranging from 5 to 25 inches per minute.
Claim 11
Dependent Claim
23 words
A method according to claim 1 wherein said standing wave is formed by inducing a self-generated pumping action in the molten metal bath.
Claim 12
Dependent Claim
16 words
A method according to claim 1 wherein the cladding thickness ranges from 0.1 to 0.5 inch.
Claim 13
Dependent Claim
23 words
A method according to claim 1 wherein said bath of molten metal cladding material is provided in a vat surrounded by heating means.
Claim 14
Dependent Claim
17 words
A method according to claim 1 wherein said cladding is formed on both sides of said plate.
References Cited (Backward Citations)
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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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |