Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LOW-STRENGTH STEEL SHEET FOR HOT STAMPING, HOT-STAMPED COMPONENT, AND METHOD FOR MANUFACTURING HOT-STAMPED COMPONENT
Document Type and Number:
WIPO Patent Application WO/2021/039499
Kind Code:
A1
Abstract:
A low-strength steel sheet for hot stamping according to an aspect of the present invention satisfies a prescribed chemical composition, the Ac3 point (°C) thereof indicated by formula (1) being 890°C or higher, and the area ratio of ferrite at a depth that is 1/4 of the thickness of the steel sheet being 80% or greater.　Formula (1): Ac3 point (°C) = 910 – 203 × [C]1/2 + 44.7 × [Si] – 30 × [Mn] + 700 × [P] + 400 × [Al] + 400 × [Ti]. In formula (1), [C], [Si], [Mn], [P], [Al], and [Ti] are values representing the content ratios of C, Si, Mn, P, Al, and Ti, respectively, in terms of mass%.

More Like This:
JP2011225939CONTINUOUS HEATING FURNACE
JP2006348858COMBINED SLIDING MEMBER, AND INTERNAL COMBUSTION ENGINE AND MACHINE DEVICE USING THE SAME
Inventors:
HAMAMOTO SAE
ASAI TATSUYA
Application Number:
PCT/JP2020/031118
Publication Date:
March 04, 2021
Filing Date:
August 18, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C21D9/00; C21D1/18; C21D9/46; C22C38/00; C22C38/06; C22C38/14
Domestic Patent References:
WO2018078844A12018-05-03
WO2019069938A12019-04-11
Foreign References:
JP2004270029A2004-09-30
JP2004058082A2004-02-26
JP5726419B22015-06-03
JP4452157B22010-04-21
JP4427462B22010-03-10
JP2019154727A2019-09-19
Other References:
"Leslie Steel Materials Science", 31 May 1985, MARUZEN CO., LTD., pages: 273
Attorney, Agent or Firm:
KOTANI, Masataka et al. (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: RINGING SUPPRESSION CIRCUIT

Next Patent: HEAT-RADIATING SHEET AND METHOD OF PRODUCING HEAT-RADIATING SHEET