Research and application of flexible production of hot-dip galvanized strip below 550 MPa grade
Based on the personalized needs of users and the characteristics of industrial production in steel plants,using the same smelting composition,similar hot rolling processes,different cold rolling reduction rates and annealing process systems,S350GD and S550GD hot-dip galvanized strip were produced.The yield strength of S350GD strip is above 360 MPa,the tensile strength is above 480 MPa,and the elongation after fracture A80 is above 20％.The yield strength of S550GD strip is above 560 MPa,the tensile strength is above 640 MPa,and the elongation after fracture A80 is above 10％.The surface quality and dimensional accu-racy of its zinc layer meet the standards and user requirements,achieving flexible and stable batch production of S350GD and S550GD hot-dip galvanized strip,improving production efficiency and reducing production costs.
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