US3921700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite metal article containing additive agents and method of adding same to molten metal
Assignee: Caterpillar Inc
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Filing: 1974-07-15
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Granted: 1975-11-25
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Expires: 1994-07-15
Abstract
Abstract A composite wire-like structure for adding relatively volatile metallic agents such as magnesium to molten ferrous metal comprising an inner core of said metallic agent, an outer sheath of ferrous metal, and an insulating material disposed between said sheath and said core in surrounding relation to the core. A method is also provided for adding said agent to molten ferrous metal comprising the steps of continuously feeding the composite wire-like structure containing said agent at a controlled rate sufficient to provide a desired amount of said agent in the molten metal.
Inventors
- 👤 Sr John G Frantzreb
- 👤 John R Nieman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:01
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D11/11; B22D11/114; B22D11/115; B22D11/108; C; C21; C21C; C21C1/00; C21C1/10; C21C7/00; C21C7/0056; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097; Y10T428/12222
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
127 words
A METHOD OF ADDING A RELATIVELY VOLATILE METALLIC AGENT TO MOLTEN FERROUS METAL COMPRISING THE STEPS OF CONTINUOUSLY FEEDING A COMPOSITE WIRE-LIKE STRUCTURE CONTAINING SAID AGENT AT A CONTROLLED RATE SUFFICIENT TO PROVIDE A DESIRED AMOUNT OF SAID AGENT WITHIN THE MOLTEN FERROUS METAL, SAID COMPOSITE WIRE-LIKE STRUCTURE COMPRISING AN INNER CORE CONTAINING SAID RELATIVELY VOLATILE METALLIC AGENT, AN OUTER SHEATH OF FERROUS METAL SUBSTANTIALLY CONCENTRICALLY DISPOSED TO SAID CORE, AND A PARTICULATE INSULATING MATERIAL HAVING A MELTING OR SUBLIMING POINT GENERALLY AT LEAST ABOUT EQUAL TO THE MELTING POINT OF SAID OUTER SHEATH DISPOSED BETWEEN SAID CORE AND SAID SHEATH, SAID INSULATING MATERIAL PROVIDING A HEAT BARRIER SUFFICIENT TO PROTECT SAID INNER CORE FROM DELIVERY PRIOR TO THE MELTING OF SAID OUTER SHEATH OF FERROUS METAL.
Claim 2
Independent Claim
127 words
A METHOD OF ADDING A RELATIVELY VOLATILE METALLIC AGENT TO MOLTEN FERROUS METAL COMPRISING THE STEPS OF CONTINUOUSLY FEEDING A COMPOSITE WIRE-LIKE STRUCTURE CONTAINING SAID AGENT AT A CONTROLLED RATE SUFFICIENT TO PROVIDE A DESIRED AMOUNT OF SAID AGENT WITHIN THE MOLTEN FERROUS METAL, SAID COMPOSITE WIRE-LIKE STRUCTURE COMPRISING AN INNER CORE CONTAINING SAID RELATIVELY VOLATILE METALLIC AGENT, AN OUTER SHEATH OF FERROUS METAL SUBSTANTIALLY CONCENTRICALLY DISPOSED TO SAID CORE, AND A PARTICULATE INSULATING MATERIAL HAVING A MELTING OR SUBLIMING POINT GENERALLY AT LEAST ABOUT EQUAL TO THE MELTING POINT OF SAID OUTER SHEATH DISPOSED BETWEEN SAID CORE AND SAID SHEATH, SAID INSULATING MATERIAL PROVIDING A HEAT BARRIER SUFFICIENT TO PROTECT SAID INNER CORE FROM DELIVERY PRIOR TO THE MELTING OF SAID OUTER SHEATH OF FERROUS METAL.
Claim 3
Dependent Claim
31 words
A method of adding an agent to ferrous metal as defined in claim 1, in which the composite wire-like structure is preheated prior to feeding same into the molten ferrous metal.
Claim 4
Dependent Claim
22 words
A method as in claim 1, wherein said relatively volatile metallic agent is delivered below the surface of the molten ferrous metal.
Claim 5
Dependent Claim
99 words
A composite wire-like structure for adding relatively volatile metallic agents to a molten metal, comprising an inner core of relatively volatile metallic agent, an outer sheath of non-volatile metal having a melting capability at the temperature of said molten metal, and a particulate insulating material with a melting or subliming point generally at least about equal to the melting point of said outer sheath disposed between said sheath and said core in surrounding relation to said core, said insulating material providing a heat barrier sufficient to protect said core from delivery prior to the melting of said outer sheath.
Claim 6
Dependent Claim
99 words
A composite wire-like structure for adding relatively volatile metallic agents to a molten metal, comprising an inner core of relatively volatile metallic agent, an outer sheath of non-volatile metal having a melting capability at the temperature of said molten metal, and a particulate insulating material with a melting or subliming point generally at least about equal to the melting point of said outer sheath disposed between said sheath and said core in surrounding relation to said core, said insulating material providing a heat barrier sufficient to protect said core from delivery prior to the melting of said outer sheath.
Claim 7
Dependent Claim
19 words
A composite wire-like structure as defined in claim 4, in which the insulating material also comprises additional additive agents.
Claim 8
Dependent Claim
29 words
A composite wire-like structure as defined in claim 4, in which the sheath is of a metal having a chemistry substantially similar to the chemistry of the molten metal.
Claim 9
Dependent Claim
106 words
A composite wire-like structure for adding relatively volatile metallic agents to a molten ferrous metal, comprising an inner core of relatively volatile metallic material, an outer sheath of ferrous metal having a melting capability at the temperature of said molten ferrous metal to which the structure is to be added substantially concentrically disposed to said core, and a particulate insulating material having a melting or subliming point generally at least about equal to the melting point of said outer sheath disposed between said core and said sheath providing a heat barrier sufficient to protect said core from delivery prior to the melting of said outer sheath.
Claim 10
Dependent Claim
106 words
A composite wire-like structure for adding relatively volatile metallic agents to a molten ferrous metal, comprising an inner core of relatively volatile metallic material, an outer sheath of ferrous metal having a melting capability at the temperature of said molten ferrous metal to which the structure is to be added substantially concentrically disposed to said core, and a particulate insulating material having a melting or subliming point generally at least about equal to the melting point of said outer sheath disposed between said core and said sheath providing a heat barrier sufficient to protect said core from delivery prior to the melting of said outer sheath.
Claim 11
Dependent Claim
18 words
A composite wire-like structure as Defined in claim 7, in which the inner core comprises a nodularizing agent.
Claim 12
Dependent Claim
16 words
A composite wire-like structure as defined in claim 8, in which the nodularizing agent is magnesium.
Claim 13
Dependent Claim
16 words
A composite wire-like structure as defined in claim 7, in which the particulate material is iron.
Claim 14
Dependent Claim
20 words
A composite wire-like structure as defined in claim 7, in which the particulate insulating material is an alloy of iron.
Claim 15
Dependent Claim
16 words
A composite wire-like structure as defined in claim 7, wherein the particulate material is magnesium coke.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |