Austenite-based molten aluminum-plated steel sheet having excellent properties of plating and weldability, and method for manufacturing same
AssigneePosco
InventorsYoung-Ha KIM, Hyeon-Seok HWANG, Kwang-Geun CHIN, Heung-Yun KIM
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Abstract
Provided are an austenite-based molten aluminum-plated steel sheet comprising: a steel plate which contains, by weight %, 0.3 to 0.9% of C, 12 to 25% of Mn, 0.5 to 2.5% of Si, 0.3 to 3.0% of Al, 0.01 to 0.5% of Ti, 0.05 to 0.5% of V, 0.01-0.5% of Mo, 0.01-0.2% of Sn, 0.001-0.1% of Co, and 0.001-0.1% of W, the remainder being Fe and unavoidable impurities; and a molten aluminum-based plated layer formed on a surface of the steel plate, and a method for producing the same.
Claims16
An austenite-based molten aluminum-plated steel plate comprising:
- a base steel plate including 0.3 to 0.9% of carbon (C), 12 to 25% of manganese (Mn), 0.5 to 2.5% of silicon (Si), 0.3 to 3.0% of aluminum (Al), 0.01 to 0.5% of titanium (Ti), 0.05 to 0.5% of vanadium (V), 0.01 to 0.5% of molybdenum (Mo), 0.01 to 0.2% of tin (Sn), 0.001 to 0.1% of cobalt (Co), 0.001 to 0.1% of tungsten (W), the remaining of iron (Fe), and other inevitable impurities, on a wt % basis;
- and
- a molten aluminum-based plated layer formed on a surface of the base steel plate.
A method of manufacturing an austenite-based molten aluminum-plated steel plate, the method comprising:
- preparing a base steel plate including 0.3 to 0.9% of carbon (C), 12 to 25% of manganese (Mn), 0.5 to 2.5% of silicon (Si), 0.3 to 3.0% of aluminum (Al), 0.01 to 0.5% of titanium (Ti), 0.05 to 0.5% of vanadium (V), 0.01 to 0.5% of molybdenum (Mo), 0.01 to 0.2% of tin (Sn), 0.001 to 0.1% of cobalt (Co), 0.001 to 0.1% of tungsten (W), the remaining of iron (Fe), and other inevitable impurities, on a wt % basis;
- heating the base steel plate to 700 to 850° C. under a reduction condition at dew point temperature or −30° C. or less and, then, maintaining the base steel plate;
- cooling the heated and maintained base steel plate;
- and
- immersing and plating the cooled base steel plate in an aluminum-based plating bath.
Dependencies are inferred from the claim text.