HOT STAMPED HIGH STRENGTH PART EXCELLENT IN POST PAINTING ANTICORROSION PROPERTY AND METHOD OF PRODUCTION OF SAME

摘要

Provided is a hot stamp-molded high-strength component having excellent corrosion resistance after coating in which the propagation of cracks generated in a plating layer during hot stamp machining is inhibited when an Al-plated steel plate has undergone hot stamp machining without the addition of special component elements for inhibiting the generation of cracks in the Al plating layer. This hot stamp-molded high-strength component having excellent corrosion resistance after coating has an alloy plating layer that includes an Al-Fe intermetallic compound phase on the surface of the steel plate, the hot stamp-molded high-strength component characterized in that the alloy plating layer is formed from a plurality of intermetallic compound phases, the average section length of crystal grains of the phases containing 40 to 65 mass% of Al in the plurality of intermetallic compound phases is 3 to 20 µm, the average value of the thickness of the Al-Fe alloy plating layer is 10 to 50 µm, and the ratio of the standard deviation of the thicknesses of the Al-Fe alloy plating layer in relation to the average value of the thicknesses satisfies the following formula: 0 < standard deviation of the thicknesses/average value of the thicknesses < 0.15.