| 摘要 |
<p>Disclosed is a high-strength hot-dip galvanized steel sheet having a composition consisting of not less than 0.05% but less than 0.12% of C, not less than 0.01% but less than 0.35% of Si, 2.0-3.5% of Mn, 0.001-0.020% of P, 0.0001-0.0030% of S, 0.005-0.1% of Al, 0.0001-0.0060% of N, more than 0.5% but not more than 2.0% of Cr, 0.01-0.50% of Mo, 0.010-0.080% of Ti, 0.010-0.080% of Nb and 0.0001-0.0030% of B and the balance of Fe and unavoidable impurities, while having a structure containing a ferrite phase having a volume fraction of 20-70% and an average crystal grain size of not more than 5μm. This high-strength hot-dip galvanized steel sheet has a high tensile strength of not less than 980 MPa (TS >= 980 MPa), while being excellent in processability and weldability.</p> |
