US3885922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessel and bimetallic components
Assignee: Hoskins Manufacturing Co
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Filing: 1974-04-25
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Granted: 1975-05-27
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Expires: 1994-04-25
Abstract
Abstract A pressure vessel with corrosion resistant lining and inexpensive overall is constructed in two steps. First, a thinwalled vessel is prepared from integrally clad plate by conventional means, the cladding thus being of controlled quality, thickness and well bonded to the backing metal. Then the thickness of the backing metal is built up to the desired dimension preferably by electroslag deposition in the continuous casting process. The electroslag layer bonds to the backing layer without penetrating to the inner layer, and thus preserves the corrosion resistance of the lining. Heavy tube sheets are prepared in similar manner by depositing additional backing metal behind a clad metal plate. We also have the possibility of using the side of the original clad sheet which is mild or low alloy wrought steel to make a mold or part of a mold against which the electroslag weld deposit is formed, such as by standing up the wrought clad sheets with the corrosion resisting layer outward and the wrought mild or low alloy steel layer facing inward to bond with the electroslag weld layer.
Inventors
- 👤 Jr Royal David Thomas
- 👤 James E Norcross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:39
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/038; B23K25/00; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/08; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958; Y10T428/12965; Y10T428/12972; Y10T428/12979
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
162 words
A HEAVY-WALLED MULTI-LAYER METALLIC VESSEL COMPRISED OF A CORROSION RESISTING SURFACE LAYER, A STRUCTURAL LAYER BONDED THERETO, AND A PLURALITY OF INCREMENTS OF WELD DEPOSITED LAYER BONDED TO THE STRUCTURAL LAYER, IN WHICH SAID CORROSION RESISTING LAYER IS OF AN ALLOY OR METAL SELECTED FROM THE CLASS CONSISTING OF AISI 300 SERIES, AISI 400 SERIES, NICKEL, NICKEL ALLOYS, COPPER DEVELOPMENT CLASSIFICATION ALLOYS, ALUMINUM, ALUMINUM ALLOY, TITANIUM, TITANIUM ALLOY, ZIRCONIUM, ZIRCONIUM ALLOY, A REFRACTORY METAL, A NOBLE METAL AND A COBALT BASE ALLOY, THE SAID STRUCTURAL LAYER IS FROM A STEEL SELECTED FROM THE CLASS CONSISTING OF MILD CARBON STEELS, MEDIUM CARBON STEELS, HIGH CARBON STEELS, LOW ALLOY STEELS AND MEDIUM CARBON STEELS, AND SAID WELD DEPOSITED LAYER IS SELECTED FROM THE CLASS CONSISTING OF MILD CARBON STEEL WELD METAL, HIGH CARBON STEEL WELD METAL, LOW ALLOY STEEL WELD METAL AND MEDIUM ALLOY STEEL WELD METAL, AND METALLURGICAL PROPERTIES CHARACTERISTIC OF ELECTROSLAG DEPOTHE WELD DEPOSITED LAYER HAVING THE DENDRITIC GRAIN STRUCTURE POSITED METAL.
Claim 2
Dependent Claim
162 words
A HEAVY-WALLED MULTI-LAYER METALLIC VESSEL COMPRISED OF A CORROSION RESISTING SURFACE LAYER, A STRUCTURAL LAYER BONDED THERETO, AND A PLURALITY OF INCREMENTS OF WELD DEPOSITED LAYER BONDED TO THE STRUCTURAL LAYER, IN WHICH SAID CORROSION RESISTING LAYER IS OF AN ALLOY OR METAL SELECTED FROM THE CLASS CONSISTING OF AISI 300 SERIES, AISI 400 SERIES, NICKEL, NICKEL ALLOYS, COPPER DEVELOPMENT CLASSIFICATION ALLOYS, ALUMINUM, ALUMINUM ALLOY, TITANIUM, TITANIUM ALLOY, ZIRCONIUM, ZIRCONIUM ALLOY, A REFRACTORY METAL, A NOBLE METAL AND A COBALT BASE ALLOY, THE SAID STRUCTURAL LAYER IS FROM A STEEL SELECTED FROM THE CLASS CONSISTING OF MILD CARBON STEELS, MEDIUM CARBON STEELS, HIGH CARBON STEELS, LOW ALLOY STEELS AND MEDIUM CARBON STEELS, AND SAID WELD DEPOSITED LAYER IS SELECTED FROM THE CLASS CONSISTING OF MILD CARBON STEEL WELD METAL, HIGH CARBON STEEL WELD METAL, LOW ALLOY STEEL WELD METAL AND MEDIUM ALLOY STEEL WELD METAL, AND METALLURGICAL PROPERTIES CHARACTERISTIC OF ELECTROSLAG DEPOTHE WELD DEPOSITED LAYER HAVING THE DENDRITIC GRAIN STRUCTURE POSITED METAL.
Claim 3
Dependent Claim
120 words
A heavy-walled metallic vessel comprising a bimetallic wrought clad plate, one side of which is a corrosion-resisting layer of the class consisting of stainless steel of the AISI 300 or 400 type, and an alloy rich in nickel, copper, aluminum, titanium or zirconium, the other side of which is a layer of the class consisting of mild carbon steel, medium carbon steel and low alloy steel, and having the hOmogeneity characteristic of wrought bimetallic materials, to which said other side only has been applied by electroslag deposition a layer of the class consisting of mild carbon steel, medium carbon steel, low alloy steel and medium alloy steel, having the dendritic grain structure and metallurgical properties characteristic of electroslag deposited metal.
Claim 4
Dependent Claim
120 words
A heavy-walled metallic vessel comprising a bimetallic wrought clad plate, one side of which is a corrosion-resisting layer of the class consisting of stainless steel of the AISI 300 or 400 type, and an alloy rich in nickel, copper, aluminum, titanium or zirconium, the other side of which is a layer of the class consisting of mild carbon steel, medium carbon steel and low alloy steel, and having the hOmogeneity characteristic of wrought bimetallic materials, to which said other side only has been applied by electroslag deposition a layer of the class consisting of mild carbon steel, medium carbon steel, low alloy steel and medium alloy steel, having the dendritic grain structure and metallurgical properties characteristic of electroslag deposited metal.
Claim 5
Dependent Claim
160 words
A heavy-walled metallic vessel comprising two bimetallic wrought clad plates, on each of the plates the outside surface comprising a corrosion resisting layer of the class consisting of stainless steel of AISI 300 or 400 type and an alloy rich in nickel, copper, aluminum or zirconium, the other side of the bimetallic plates being a layer of the class consisting of mild carbon steel, medium carbon steel or low alloy steel, and having the improved bonding characteristic of wrought metal bonding, between which layers of mild carbon steel, medium carbon steel, or low alloy steel of the respective bimetallic wrought clad plates an electroslag layer is deposited of the class consisting of mild carbon steel, medium carbon steel, low alloy steel and medium alloy steel, simultaneously fusing the inside surfaces of the wrought clad plates to form a plate uniformly clad on both sides, the electroslag layer having the dendritic grain structure and metallurgical properties characteristic of electroslag deposited metal.
Claim 6
Dependent Claim
160 words
A heavy-walled metallic vessel comprising two bimetallic wrought clad plates, on each of the plates the outside surface comprising a corrosion resisting layer of the class consisting of stainless steel of AISI 300 or 400 type and an alloy rich in nickel, copper, aluminum or zirconium, the other side of the bimetallic plates being a layer of the class consisting of mild carbon steel, medium carbon steel or low alloy steel, and having the improved bonding characteristic of wrought metal bonding, between which layers of mild carbon steel, medium carbon steel, or low alloy steel of the respective bimetallic wrought clad plates an electroslag layer is deposited of the class consisting of mild carbon steel, medium carbon steel, low alloy steel and medium alloy steel, simultaneously fusing the inside surfaces of the wrought clad plates to form a plate uniformly clad on both sides, the electroslag layer having the dendritic grain structure and metallurgical properties characteristic of electroslag deposited metal.
Claim 7
Dependent Claim
173 words
A clad member of metallic composition comprising a bimetallic wrought clad plate formed into a cylinder, the outside surface of which bent in cylindrical form, the outside surface of which is a corrosion resisting layer of the class consisting of stainless steel of the AISI 300 or 400 type, and an alloy rich in nickel, copper, aluminum, titanium, or zirconium and the inside surface of which is a layer of the class consisting of mild carbon steel, medium carbon steel and low alloy steel, the bond between the two said layers being that characteristic of wrought metal bonding, and on the exposed inner surface of the mild carbon steel, medium carbon steel or low alloy steel layer an electroslag deposited layer of the class consisting of mild carbon steel, medium carbon steel, low alloy steel and medium alloy steel is fused to the layer of mild carbon steel, medium carbon steel, low alloy steel, or medium alloy steel, the electroslag layer having the dendritic structure and metallurgical properties characteristic of electroslag deposited metal.
Claim 8
Dependent Claim
173 words
A clad member of metallic composition comprising a bimetallic wrought clad plate formed into a cylinder, the outside surface of which bent in cylindrical form, the outside surface of which is a corrosion resisting layer of the class consisting of stainless steel of the AISI 300 or 400 type, and an alloy rich in nickel, copper, aluminum, titanium, or zirconium and the inside surface of which is a layer of the class consisting of mild carbon steel, medium carbon steel and low alloy steel, the bond between the two said layers being that characteristic of wrought metal bonding, and on the exposed inner surface of the mild carbon steel, medium carbon steel or low alloy steel layer an electroslag deposited layer of the class consisting of mild carbon steel, medium carbon steel, low alloy steel and medium alloy steel is fused to the layer of mild carbon steel, medium carbon steel, low alloy steel, or medium alloy steel, the electroslag layer having the dendritic structure and metallurgical properties characteristic of electroslag deposited metal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |