ALUMINUM-PLATED STEEL SHEET HAVING SUPERIOR CORROSION RESISTANCE, HOT PRESS FORMED PRODUCT USING THE SAME, AND METHOD FOR PRODUCTION THEREOF

摘要

The present invention provides a plated steel sheet and a method for production thereof, in which conditions for a plating bath are optimized during production of a hot rolled steel sheet or a cold rolled steel sheet into an aluminum-plated steel sheet, and processes are controlled during production of a hot press formed product from the steel sheet, thereby forming a plating layer having a (Fe3Al+FeAl) compound layer at a high rate at the surface of the steel sheet. The present invention also provides a hot press formed product using the steel sheet, and a method for production thereof. In cases where the (Fe3Al+FeAl) compound layer has an appropriate occupancy rate to the thickness of the whole plating layer, superior resistance against crack and corrosion is achieved to remarkably improve a local corrosion resistance of the hot press formed product, specifically, resistance against a hole corrosion, thereby obtaining high quality hot press formed products with high productivity and low costs.