EP-4711479-A8 - ALUMINUM-BASED PLATED STEEL PLATE FOR HOT PRESS HAVING EXCELLENT RESISTANCE AGAINST HYDROGEN DELAYED FRACTURE AND SPOT WELDABILITY, AND METHOD FOR MANUFACTURING SAME
EP4711479A8EP 4711479 A8EP4711479 A8EP 4711479A8EP-4711479-A8
Abstract
The present invention provides an aluminum-based plated steel plate used in hot-press forming, the steel plate comprising: a base steel plate; and a plating layer formed on the base steel plate, wherein the plating layer comprises: an alloying layer formed on the surface of the base steel plate and including one or more of Fe 3Al, FeAl(Si), Fe 2Al 5, and FeAl 3 ; and an aluminum layer formed on the alloying layer and having a thickness less than 10% of the thickness of the plating layer, and the plating layer has a thickness of 5-20 µ m and an oxygen content of 10 weight% or less, as measured by GDS, at a depth of 0.1 µ m from the surface of the plating layer.
Inventors
- OH, JIN-KEUN
- KIM, SEONG-WOO
- CHO, YEOL-RAE
- KIM, SANG-HEON
Assignees
- POSCO Co., Ltd
Dates
- Publication Date
- 20260506
- Application Date
- 20191129