Metal treatment – Process of modifying or maintaining internal physical... – Utilizing disclosed mathematical formula or relationship
Reexamination Certificate
2011-05-10
2011-05-10
Yee, Deborah (Department: 1733)
Metal treatment
Process of modifying or maintaining internal physical...
Utilizing disclosed mathematical formula or relationship
C148S500000, C148S508000, C148S579000, C148S602000, C148S603000, C148S651000, C374S043000
Reexamination Certificate
active
07938917
ABSTRACT:
A method for controlling the cooling of a steel sheet characterized by controlling the end-of-cooling temperature in a cooling process from the Ae3or above temperature of the steel sheet, during which; preliminarily obtaining enthalpies (Hγ and Hα) of an austenite phase and ferrite phase respectively at some temperature, obtaining a gynamic enthalpy (Hsys) defined by formula (1) with an untransformed fraction (Xγ) of austenite in accordance with a target temperature pattern, predicting the temperature by using a gradient of this dynamic enthalpy with respect to temperature as a dynamic specific heat and controlling the cooling of the steel sheet:in-line-formulae description="In-line Formulae" end="lead"?Hsys=Hγ(Xγ)+Hα(1−Xγ). formula (1)in-line-formulae description="In-line Formulae" end="tail"?
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Hishinuma Noriyuki
Miyata Hidenori
Okamoto Riki
Taniguchi Hirokazu
Kenyon & Kenyon LLP
Nippon Steel Corporation
Yee Deborah
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