| 摘要 |
PROBLEM TO BE SOLVED: To provide a high strength galvanized steel plate having excellent workability of TS:980 MPa or more and TS×UEL:15000 MPa % or more suitable for a material of an automobile component, and a production method therefor.SOLUTION: A high strength galvanized steel plate excellent in workability contains a micro structure including a component composition consisting of, by mass%, C:0.15 to 0.40%, Si:0.5 to 3.0%, Al:0.010 to 3.000%, Mn:1.5 to 4.0%, P:0.100% or less, S:0.020% or less, Sn:0.01 to 0.50% and the balance of Fe and inevitable impurities, and a bainitic ferrite having an area ratio of 3 to 68%, a martensite having the sum of an area ratio of 10 to 65% and a tempering martensite, and a retained austenite having an area ratio of 5% or more. |
