US 11,993,825 B2
Hot press forming member having excellent resistance to hydrogen embrittlement, and method for manufacturing same
Seong-Woo Kim, Gwangyang-si (KR); Jin-Keun Oh, Gwangyang-si (KR); Sang-Heon Kim, Gwangyang-si (KR); and Sang-Bin Han, Gwangyang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Appl. No. 17/298,782
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 2, 2019, PCT No. PCT/KR2019/016838
§ 371(c)(1), (2) Date Jun. 1, 2021,
PCT Pub. No. WO2020/116876, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 10-2018-0153533 (KR), filed on Dec. 3, 2018.
Prior Publication US 2022/0033929 A1, Feb. 3, 2022
Int. Cl. B32B 15/01 (2006.01); C21D 6/00 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C23C 2/02 (2006.01); C23C 2/12 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01)
CPC C21D 9/48 (2013.01) [B32B 15/012 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0405 (2013.01); C21D 8/0421 (2013.01); C21D 8/0447 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C23C 2/02 (2013.01); C23C 2/12 (2013.01); C23C 2/28 (2013.01); C23C 2/29 (2022.08); C23C 2/40 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A hot press formed member having excellent resistance to hydrogen embrittlement, the hot press formed member comprising:
a base steel sheet and an alloy-plated layer formed on a surface of the base steel sheet,
wherein the alloy-plated layer contains pores such that number density, obtained by dividing an area of the alloy-plated layer by the number of pores having a size of 5 μm or less by an area of the alloy-plated layer, is 5×103 to 2×106 number/mm2, when viewed in a cross-section taken in a thickness direction of the hot press formed member.