The invention provides a high-strength hot-dip
zinc plated steel sheet which exhibits high TS-El balance, excellent stretch frangeability, excellent workability due to low YR, and excellent
impact characteristics, and a process for manufacturing the same. A high-strength hot-dip
zinc plated steel sheet excellent in workability and
impact characteristics, having a composition which contains by
mass C: 0.05 to 0.3%, Si: 0.01 to 2.5%, Mn: 0.5 to 3.5%, P: 0.003 to 0.100%, S: 0.02% or below, Al: 0.010 to 1.5%, and N: 0.007% or below and further contains at least one element selected from among Ti, Nb and V in a total amount of 0.01 to 0.2% with the balance being Fe and unavoidable impurities and a
microstructure which comprises, in terms of
area fraction, 20 to 87% of ferrite, 3 to 10% (in total) of
martensite and retained
austenite, and 10 to 60% of tempered
martensite and in which the average grain
diameter of the second phase consisting of the
martensite, retained
austenite, and tempered martensite is 3[mu]m or below.