Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takashi Yaekura0
Kazuyuki Kawano0
Yasunori Ito0
Yoshifumi Kobayashi0
Date of Patent
January 6, 2015
0Patent Application Number
138124080
Date Filed
August 23, 2011
0Patent Citations Received
Patent Primary Examiner
Patent abstract
In a cooling a galvanized steel sheet (W), change in emissivity of a surface of the galvanized steel sheet (W) is measured in a temperature range lower than the boiling point of zinc but not lower than the ferrite transformation temperature, using an emissivity sensor (4) with an observation wavelength of 1.4 μm or longer, and pressing and quenching in a pressing and quenching apparatus (2) is started after completion of an alloying reaction has been detected based on the change in emissivity. The emissivity sensor (4) preferably has an InGaAs element or a thermopile as a measuring element.
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