Hot stamped high strength part excellent in post painting anticorrosion property and method of production of same

摘要

A hot stamped high strength part which is excellent in post painting anticorrosion property, which hot stamped high strength part has an alloy plating layer including an Al—Fe intermetallic compound phase on the surface of the steel sheet. The 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 the phases of the plurality of intermetallic compounds is 3 to 20 μm, an average value of thickness of the 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 the Al—Fe alloy plating layer satisfies the following relationship: 0

主权项

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:
0