Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yoshiro Tsuchiya0
Saiji Matsuoka0
Shunji Ilzuka0
Takeshi Fujita0
Nobuyuki Nakamura0
Date of Patent
February 1, 2011
Patent Application Number
12291118
Date Filed
November 6, 2008
Patent Primary Examiner
Patent abstract
A method for manufacturing a high carbon hot-rolled steel sheet. The method including the steps of hot-rolling, primary cooling, secondary cooling, coiling, acid-washing and annealing. The primary cooling step is to cool the hot-rolled steel sheet down to a cooling termination temperature of 450° C. to 600° C. at a cooling rate of higher than 120° C./sec. The secondary cooling step is to apply a secondary cooling to hold the primarily cooled hot-rolled steel sheet at a temperature of 450° C. to 650° C. until coiling.
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