| abstract |
A high-strength hot-dip galvanized steel sheet having excellent workability, which can obtain good ductility, stretch flangeability and bendability without performing reheating treatment after cooling. SOLUTION: In mass%, C: 0.03-0.17%, Si: 0.01-0.75%, Mn: 1.5-2.5%, P: 0.080% or less, S : 0.010% or less, sol. Al: 0.01 to 1.20%, Cr: 0.3 to 1.3%, the balance is Fe and inevitable impurities, the steel structure is 30 to 70% ferrite by volume, 3% A high-strength hot-dip galvanized steel sheet excellent in workability having a hot-dip galvanized layer on a base steel sheet comprising less than retained austenite and the remaining martensite and 20% or more of the martensite is tempered martensite. [Selection figure] None |