Patent US3842896A successfully refreshed from Google Patents.
US3842896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing composite metal wire
Assignee: Monsanto Co
•
Filing: 1973-06-04
•
Granted: 1974-10-22
•
Expires: 1993-06-04
Abstract
Abstract A method is provided for cladding aluminum on steel wire in controllable thickness to produce a composite metal wire at high rates of productivity. Steel wire is rapidly advanced through the center of a melt extrusion orifice during a concomitant extrusion of molten aluminum through the orifice. As the steel coated with hot, molten aluminum emerges from the orifice, contact is made with a gaseous atmosphere that is reactive with the aluminum. Immediate reaction occurs and a thin film is formed about the aluminum coating which serves to stabilize the coating against break-up caused by surface tension forces until solidification can occur through heat transfer.
Inventors
- 👤 E Dobo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:49
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/12; C23C2/003; C23C2/0035; C23C2/0036; C23C2/00361; C23C2/34; C23C2/36; C23C2/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A METHOD FOR PRODUCING ALUMINUM-CLAD STEEL COMPOSITE WIRE COMPRISING THE STEPS OF: A. FORMING A CLAD OF MOLTEN ALUMINIUM ABOUT A PREHEATED STRAND OF STEEL WIRE BY MOVING THE STEEL WIRE DIRECTLY THROUGH THE CENTER OF A MELT EXTRUSION ORIFICE WHILE SIMULTANEOUSLY EXTRUDING MOLTEN ALUMINIUM THROUGH SAID ORIFICE, SAID STEEL WIRE HAVING BEEN PREHEATED TO A TEMPERATURE PROXIMATE TO THAT OF THE MOLTEN ALUMINUM BEFORE CONTACT THEREWITH; B. CAUSING A PROTECTIVE FILM TO FORM ABOUT SAID MOLTEN ALU MINUM CLAD BY CONTACTING SAME WITH A REACTIVE GASEOUS ATMOSPHERE IMMEDIATELY UPON EXIT FROM SAID MELT EXTRUSION ORIFICE; AND C. COOLIG THE MOLTEN ALUMINUM-CLAD STEEL WIRE TO EFFECT A SOLIDIFICATION OF THE ALUMINUM CLADDING.
Claim 2
Independent Claim
112 words
A METHOD FOR PRODUCING ALUMINUM-CLAD STEEL COMPOSITE WIRE COMPRISING THE STEPS OF: A. FORMING A CLAD OF MOLTEN ALUMINIUM ABOUT A PREHEATED STRAND OF STEEL WIRE BY MOVING THE STEEL WIRE DIRECTLY THROUGH THE CENTER OF A MELT EXTRUSION ORIFICE WHILE SIMULTANEOUSLY EXTRUDING MOLTEN ALUMINIUM THROUGH SAID ORIFICE, SAID STEEL WIRE HAVING BEEN PREHEATED TO A TEMPERATURE PROXIMATE TO THAT OF THE MOLTEN ALUMINUM BEFORE CONTACT THEREWITH; B. CAUSING A PROTECTIVE FILM TO FORM ABOUT SAID MOLTEN ALU MINUM CLAD BY CONTACTING SAME WITH A REACTIVE GASEOUS ATMOSPHERE IMMEDIATELY UPON EXIT FROM SAID MELT EXTRUSION ORIFICE; AND C. COOLIG THE MOLTEN ALUMINUM-CLAD STEEL WIRE TO EFFECT A SOLIDIFICATION OF THE ALUMINUM CLADDING.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein said reactive gaseous atmosphere is oxygen.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein said reactive gaseous atmosphere is ammmonia.
Claim 5
Dependent Claim
13 words
The method of claim 1, wherein said reactive gaseous atmosphere is hydrogen sulfide.
Claim 6
Independent Claim
143 words
A method for producing aluminum-clad steel composite wire comprising the steps of: a. forming a clad of molten aluminum about a strand of steel wire preheated to a temperature in the range of about 670* to 700* C. by forwarding said steel wire directly through the center of a melt extrusion orifice at a velocity in the range of from about 200 to 1,500 feet per minute while molten aluminum is being concurrently extruded through said orifice under a head pressure of from about 0.5 to 20 p.s.i.g. and a temperature in the range of about 670* to 700* C.; b. causing a protective film to form about said molten aluminum clad by contacting same with a reactive gaseous atmosphere immediately upon exit from said melt extrusion orifice; and c. cooling the molten aluminum-clad steel wire to effect solidification of the aluminum cladding.
Claim 7
Independent Claim
143 words
A method for producing aluminum-clad steel composite wire comprising the steps of: a. forming a clad of molten aluminum about a strand of steel wire preheated to a temperature in the range of about 670* to 700* C. by forwarding said steel wire directly through the center of a melt extrusion orifice at a velocity in the range of from about 200 to 1,500 feet per minute while molten aluminum is being concurrently extruded through said orifice under a head pressure of from about 0.5 to 20 p.s.i.g. and a temperature in the range of about 670* to 700* C.; b. causing a protective film to form about said molten aluminum clad by contacting same with a reactive gaseous atmosphere immediately upon exit from said melt extrusion orifice; and c. cooling the molten aluminum-clad steel wire to effect solidification of the aluminum cladding.
Claim 8
Dependent Claim
12 words
The method of claim 1, wherein said reactive gaseous atmosphere is oxygen.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |