Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1996-12-16
1998-05-12
Ip, Sikyin
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148599, C22C 3800
Patent
active
057499810
ABSTRACT:
The present process comprising the steps of:
(1) heating a steel wire to a temperature which is within the range of approximately 850.degree. C. to about 1050.degree. C. for a period of at least about 2 seconds; wherein said steel wire is comprised of a microalloyed high carbon steel which consists essentially of about 97.03 to about 98.925 weight percent iron, from about 0.72 to about 0.92 weight percent carbon, from about 0.3 to about 0.8 weight percent manganese, from about 0.05 to about 0.4 weight percent silicon, and from about 0.005 to about 0.85 weight percent of at least one member selected from the group consisting of chromium, vanadium, nickel, and boron, with the proviso that the total amount of silicon, manganese, chromium, vanadium, nickel, and boron in the microalloyed high carbon steel is within the range of about 0.7 to 0.9 weight percent;
(2) continuously cooling the steel wire at a cooling rate of less than 100.degree. C. per second until a transformation from austenite to pearlite begins;
(3) allowing the transformation from austenite to pearlite to proceed with an increase in the wire temperature resulting from recalescence; and
(4) cooling the patented steel wire to ambient temperature.
REFERENCES:
patent: 5125987 (1992-06-01), Eguchi et al.
patent: 5167727 (1992-12-01), Kim et al.
patent: 5595617 (1997-01-01), Tonteling et al.
Blum Josy Jean
Helfer Farrel Bruce
Palmer Kenneth Joseph
Todd Rodger
Tonteling Charles N. A.
Ip Sikyin
Rockhill Alvin T.
The Goodyear Tire & Rubber Company
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