| 摘要 |
PROBLEM TO BE SOLVED: To provide a high strength alloy galvanized steel sheet having excellent baking hardenability and bendability and tensile strength of 1180 MPa or more.SOLUTION: There is provided a high strength alloy galvanized steel sheet containing, by mass%, C:0.05 to 0.30%, Si:0.5 to 3.0%, Mn:0.2 to 3.0%, P:0 to 0.10%, S:0 to 0.010%, N:0 to 0.010%, Al:0.001 to 0.10% and the balance iron with inevitable impurities, having a structure of the steel containing, by area percentage, martensite:50 to 85%, ferrite:0% or more and less than 5% and the balance bainite, a dislocation density of 5.0×10mor more, solid-solution carbon of 0.08 mass% or more and tensile strength of 1180 MPa or more. |
