Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yuri Toda0
Kazuo Hikida0
Shingo Fujinaka0
Tomohito Tanaka0
Date of Patent
November 23, 2021
0Patent Application Number
169711330
Date Filed
March 29, 2018
0Patent Primary Examiner
Patent abstract
A hot stamped article excellent in strength having a predetermined composition, having an average crystal grain size of prior austenite of 3 μm or less, containing at least one of lower bainite, martensite, and tempered martensite in an area rate of 90% or more, and having a grain boundary solid solution ratio Z, defined by Z=(mass % of one or both of Nb and Mo at the grain boundaries)/(mass % of one or more of Nb and Mo at time of dissolution) of 0.3 or more.
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