Patent ID: 8986849
Filing Date: 2015-03-24
Classification: B21B,C21D,C22C,C23C,Y10T

Abstract:
1. A hot stamped high strength part formed of a steel sheet which is excellent in post painting anticorrosion property, comprising an alloy plating layer comprising an Al—Fe intermetallic compound phase on the surface of the steel sheet, said alloy plating layer is comprised from phases of a plurality of intermetallic compounds, a mean linear intercept length of crystal grains of a phase containing Al: 40 to 65 mass % among said phases of the plurality of intermetallic compounds is 3 to 20 μm, an average value of thickness of said Al—Fe alloy plating layer is 10 to 50 μm, and a ratio of the average value of thickness to the standard deviation of thickness of said Al—Fe alloy plating layer satisfies the following relationship: