POSCO Holdings Inc.
HOT-DIP GALVANIZED STEEL PLATE WITH EXCELLENT BAKE HARDENABILITY AND ANTI-AGING PROPERTY AT ROOM TEMPERATURE AND MANUFACTURING METHOD THEREFOR

Abstract:

Provided is a hot-dip galvanized steel plate which is applicable as a material for a vehicle outer panel and has an excellent bake hardenability and anti-aging property at room temperature, and a method for manufacturing a hot-dip galvanized steel plate, the method comprising a process including the steps of: winding a hot-rolled steel plate, followed by cooling at a speed of 0.002-0.027.degree. C./sec; cold-rolling the cooled steel plate; continuously annealing the cold-rolled steel plate; and cooling the annealed steel plate in the multi-stage manner of primary to third rounds.