Hot-dip galvanized steel sheet having excellent surface appearance and low-temperature bonding brittleness
AssigneePosco
InventorHyeon-Seok HWANG
Life of this patent
Estimating the term…
Abstract
Provided is a hot-dip galvanized steel sheet to be used for home appliances, vehicles, and the like, and having excellent surface appearance and low-temperature bonding brittleness. The hot-dip galvanized steel sheet includes: a base steel sheet; and a hot-dip galvanized layer formed on the base steel sheet. A surface of the base steel sheet has a centerline average roughness (Ra) of 0.3 or more, a roughness skewness (Rsk) of −1 or less, and a roughness kurtosis (Rku) of 6 or more.
Claims6
A hot-dip galvanized steel sheet having excellent surface appearance and low-temperature bonding brittleness, comprising:
- a base steel sheet;
- and
- a hot-dip galvanized layer formed on the base steel sheet,
- wherein a surface of the base steel sheet has a centerline average roughness (Ra) of 0.3 or more, a roughness skewness (Rsk) of −1 or less, and a roughness kurtosis (Rku) of 6 or more.
A method of manufacturing a hot-dip galvanized steel sheet having excellent surface appearance and low-temperature bonding brittleness, comprising operations of:
- preparing a base steel sheet;
- forming unevenness having a centerline average roughness (Ra) of 0.3 or more, a roughness skewness (Rsk) of −1 or less, and a roughness kurtosis (Rku) of 6 or more on a surface of the base steel sheet;
- and
- manufacturing a hot-dip galvanized layer by immersing the base steel sheet with the unevenness formed in a hot-dip galvanizing bath.
Dependencies are inferred from the claim text.