Aluminum-based plated steel plate for hot press having excellent resistance against hydrogen delayed fracture and spot weldability, and method for manufacturing same
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United States of America Patent
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Oct 22, 2024
Grant Date -
N/A
app pub date -
Nov 29, 2019
filing date -
Nov 30, 2018
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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 μm and an oxygen content of 10 weight % or less, as measured by GDS, at a depth of 0.1 μm from the surface of the plating layer.
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