MATERIAL FOR HOT STAMPING

WIPO Patent Application WO/2023/106899

A1

A material for hot stamping according to an embodiment of the present invention comprises: a steel sheet comprising 0.28 to 0.50 wt% of carbon (C), 0.15 to 0.70 wt% of silicon (Si), 0.5 to 2.0 wt% of manganese (Mn), 0.05 wt% or less of phosphorus (P), 0.01 wt% or less of sulfur (S), 0.1 to 0.5 wt% of chromium (Cr), 0.001 to 0.005 wt% of boron (B), 0.1 wt% or less of an additive, and the remainder of iron (Fe) and other inevitable impurities; and fine precipitates distributed in the steel sheet, wherein the additive includes at least one of titanium (Ti), niobium (Nb) and vanadium (V), the fine precipitates include a nitride or carbide of the at least one of titanium (Ti), niobium (Nb) and vanadium (V) and trap hydrogen, and the coefficient of variation of the average diameter, which is a value obtained by dividing the standard deviation of the average diameter of the fine precipitates by the average diameter of the fine precipitates, is 0.7 or less.

JP2023506477	Heat-treated cold-rolled steel sheet and manufacturing method thereof
WO/2018/073240	VEHICLE WHEEL AND USE THEREOF
JP5365758	Steel plate and its manufacturing method

SHIN NU RI (KR)
SEO YONG KI (KR)
SON JI HEE (KR)
JUNG SANG BAE (KR)

PCT/KR2022/020150

June 15, 2023

December 12, 2022

Click for automatic bibliography generation  

HYUNDAI STEEL CO (KR)

C22C38/38; B21D22/02; C22C38/24; C22C38/26; C22C38/28; C22C38/32

JP2005068548A	2005-03-17
KR20190001493A	2019-01-04
JP2005126733A	2005-05-19
KR20140102310A	2014-08-21
KR20180133508A	2018-12-14

Y.P.LEE, MOCK & PARTNERS (KR)

View/Download PDF      PDF Help

Previous Patent: MATERIAL FOR HOT STAMPING

Next Patent: DISPLAY DEVICE AND METHOD FOR MANUFACTURING DISPLAY DEVICE