| abstract |
Disclosed is a high-strength hot-dip galvanized steel sheet that suppresses non-plating and surface defects and has both corrosion resistance, high ductility, and good weld strength, and a method for producing the same. SOLUTION: In mass%, C: 0.1 to 0.3%, Si: 0.001 to less than 0.200%, Mn: 1.0 to 3.0%, Al: 0.5 to 2. 0%, P: 0.001 to 0.300%, S: 0.0001 to 0.1000%, O: 0.0005 to 0.0100%, N: 0.001 to 0.010%, A hot-dip galvanized steel sheet comprising the balance Fe and inevitable impurities, wherein the microstructure of the steel is 30 to 90% ferrite phase in volume fraction, 5% or more bainite, 10% or less martensite, and 5 to 30 % Of the retained austenite phase, the carbon concentration in the retained austenite is 1.0% by mass or more, and the average aspect ratio (maximum width / minimum width) of the retained austenite grains is 2 or less. Plated steel sheet. [Selection] Figure 1 |