Zinc-plated steel sheet and method for producing same

A method for manufacturing a zinc-plated steel sheet, the method comprising:

• an annealing step of holding a steel sheet at an annealing temperature of 700 to 1000° C. for 1 second or more to anneal the steel sheet, the steel sheet having a chemical composition including, in mass %, C:
• 0.10 to 0.40%, Si:
• 0.10 to 3.00%, Mn:
• 1.00 to 5.00%, sol.Al:
• 0.001 to 1.500%, P;
• 0.0010 to 0.0300%, S:
• 0.0200% or less, N:
• 0.0100% or less, O:
• 0.0100% or less, Ti:
• 0 to 0.200%, B:
• 0 to 0.0100%, Cr:
• 0 to 1.000%, Mo:
• 0 to 1.000%, Ni:
• 0 to 1.000%, Cu:
• 0 to 1.000%, Sn:
• 0 to 0.500%, Nb:
• 0 to 0.200%, V:
• 0 to 0.500%, W:
• 0 to 0.500%, Ca:
• 0 to 0.0100%, Mg:
• 0 to 0.0100%, Bi:
• 0 to 0.0100%, Sb:
• 0 to 0.1000%, Zr:
• 0 to 0.0100%, REM:
• 0 to 0.1000%, and a remainder:
• Fe and an impurity;
• and
• a plating step of forming a zinc-plated layer on a surface of the steel sheet after the annealing step, wherein
• in the annealing step, in a heating process to the annealing temperature, an average heating rate in a first temperature range of 400 to 650° C. is 2.0° C./sec or more, and an average heating rate in a second temperature range of 650° C. to the annealing temperature is 0.5 to 5.0° C./sec and an atmosphere having (P(H2O)/P(H2)) in the second temperature range is 0.05 to 2.00,
• in the plating step, the steel sheet is cooled to a temperature of 440 to 550° C. at an average cooling rate of 0.5° C./sec or more, is immersed in a plating bath containing Zn as a main component and having an effective Al amount of 0.050 to 0.250 mass %, is pulled up from the plating bath, then is cooled so that a temperature of the steel sheet reaches 400° C. within 10 seconds, and subsequently is cooled to 350° C. or less so that at an average cooling rate from 400° C. to 350° C. is 1.0° C./sec or more and 5.0° C./sec or less.