STEEL SHEET FOR HOT STAMPING USE

Title:

STEEL SHEET FOR HOT STAMPING USE

Document Type and Number:

WIPO Patent Application WO/2020/195012

Kind Code:

A1

Abstract:

A steel sheet for hot stamping use has such a metal structure that crystal subgrains having an average crystal misorientation value of 0.4 to 3.0° inclusive are contained at an area ratio of 10% or more in the inside of crystal grains surrounded by a crystal grain boundary and having an average crystal misorientation value of 5° or more and that the ratio of the length of a grain boundary having an average crystal misorientation value of 0.4 to 3.0° inclusive to the sum total of the length of the grain boundary having an average crystal misorientation value of 0.4 to 3.0° inclusive and the length of a grain boundary having an average crystal misorientation value of more than 3.0° is 60% or more.

Inventors:

HONDA YOSHIAKI (JP)
TODA YURI (JP)
HIKIDA KAZUO (JP)
MARUYAMA NAOKI (JP)

Application Number:

PCT/JP2020/000688

Publication Date:

October 01, 2020

Filing Date:

January 10, 2020

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)

International Classes:

C21D1/18; C21D9/00; C21D9/46; C22C38/00; C22C38/60

Domestic Patent References:

WO2018151333A1	2018-08-23
WO2018180979A1	2018-10-04

Foreign References:

JP2004211197A	2004-07-29
JP2010215954A	2010-09-30
JP2005213628A	2005-08-11
JPS63317629A	1988-12-26
JP2012001802A	2012-01-05