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US 12,698,552 B2Granted
Galvanized steel sheet with excellent surface quality and electrical resistance spot weldability and method for manufacturing same
AssigneePosco
InventorsKi-Cheol Kang, Yong-Joo Kim, Tae-Chul Kim, Myung-Soo Kim, Jong-Sang Kim
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Abstract
The present invention relates to a high-strength hot-dipped galvanized steel sheet having excellent surface quality and spot weldability and a method for manufacturing same. The hot-dipped galvanized steel sheet according to one aspect of the present invention comprises a base steel sheet and a hot-dipped galvanized layer formed on the surface of the base steel sheet, in which an inhibiting layer made of an Fe—Al alloy can be formed at an area ratio of 60% or more between the base steel sheet and the hot-dipped galvanized layer.
Claims5
A hot-dipped galvanized steel sheet, comprising:
- a base steel sheet;
- and
- a hot-dipped galvanized layer formed on a surface of the base steel sheet,
- wherein an inhibiting layer made of a Fe—Al alloy is formed at an area ratio of 60% or more between the base steel sheet and the hot-dipped galvanized layer,
- wherein an average width of particles constituting the inhibiting layer is 4 μm or less, and
- wherein, the average width of the particle means that, when a straight line is drawn in one direction in a photograph of the inhibiting layer viewed from above, a length of a line segment overlapping the particle is determined as a width of the particle, and the average is obtained.
3 more elements
Dependencies are inferred from the claim text.