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
C148S653000, C148S652000, C148S654000
Reexamination Certificate
active
07459038
ABSTRACT:
The invention is method of making steel with carbide banding obtaining steel with undissolved carbides distributed within the steel for forming steel with carbide banding, 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, deforming the steel with undissolved carbide, moving a portion of the steel with undissolved carbides, heating the steel with undissolved carbides for a time ranging from 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 crystalline matrix forming steel with carbide banding.
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Computer-generated English translation of Japanese patent 2000-273537, Oct. 2000, Suzuki, Masahito et al.
Computer-generated English translation of Japanese patent 09-137247, Anami, Goro et al, 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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