A method for producing a high-strength hot-dip galvanized steel sheet, a method for producing a hot-rolled steel sheet for a high-strength hot-dip galvanized steel sheet, a method for producing a cold-

摘要

There is provided a method for producing a high strength hot dip galvanized steel sheet excellent in moldability, surface appearance and plating adhesion, a method for manufacturing a hot rolled steel sheet for a high strength hot dip galvanized steel sheet, a method for manufacturing a cold rolled steel sheet for a high strength hot dip galvanized steel sheet, and a high strength hot dip galvanized steel sheet . Mn: not less than 2.00% and not more than 10.00%. A value obtained by dividing the average Mn mass% in the retained austenite by the average Mn mass% in the ferrite is 2.0 or more. H ₂ concentration of 0.1 vol% or more and 25.0 vol% or less and an atmosphere having a dew point of -45 캜 or more and 0 캜 or less in a temperature range of 650 캜 to 850 캜, 1 heat treatment, a _second heat treatment in which H ₂ concentration is 0.05 vol% or more and 25.0 vol% or less, and the dew point is kept at -10 캜 or lower in a temperature range of 600 캜 or more and 830 캜 or less for 20 s or more and 900 s or less.