Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2005-05-31
2008-12-02
Yee, Deborah (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
C148S548000
Reexamination Certificate
active
07459040
ABSTRACT:
The invention is a method of making a steel article comprising carbide banding by using steel with undissolved carbides distributed within the steel, wherein the steel is about 0.3 weight percent to about 2.2 weight percent carbon and at least 0.003 weight percent of chromium, molybdenum, aluminum, vanadium, tungsten, or a similar carbide forming element; then, heating the steel with carbides for a time ranging between about 5 minutes to about 12 hours at a temperature above an A-sub 1 temperature and below 50 degrees Fahrenheit of an A-sub 3 temperature to form an austenitic steel with undissolved carbides; and cooling the austenitic steel with undissolved carbides to maintain the undissolved carbides within a chosen crystalline matrix creating carbide banding in the steel.
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Tne computer-generated English translation of Japanese patent 2000-273537, Oct. 3, 2000, Suzuki, Mashito et al.
Computer-generated English translation of Japanese patent 09-137247, Anami, Goro et al. dated May 27, 1997.
Verhoeven, John D., A Review of Microsegregation Induced Banding Phenomena in Steels, Journal of Materials Engineering and Performance, vol. 9(3) Jun. 2000, pp. 286-296.
Sword Forum International, found at http://forums.swordforum.com/showthread.php?t=11162, as of Dec. 20, 2007.
Buskop Wendy
Buskop Law Group PC
Yee Deborah
LandOfFree
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