2010•Steel RollingRequires access
Development of 1000MPa Cold Rolling Hot Dip Galvanized Dual Phase Steel
Jin Guang-can
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Abstract
1000MPa grade cold rolling hot dip galvanized dual phase steels were exploited in laboratory.The chemical composition,hot dip galvanizing and annealing processes,microstructures and properties of this steel were introduced.The experimental results indicated that the temperatures of Ac_1,Ac_3 and Ms are 725℃, 850℃and 390℃respectively.After hot dip galvanized annealing process,which annealing temperatures and soaking time are 820℃and 80s,the tensile strength and elongation of hot dip galvanized dual phase steel could reach 1014MPa and 13.17%respectively.Typical ferrite and martensite structure can be observed by SEM at room temperature.