HOT-ROLLED STEEL SHEET
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United States of America
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Issued Date -
Apr 3, 2025
app pub date -
Dec 22, 2022
filing date -
Dec 22, 2022
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Abstract
A hot-rolled steel sheet has a predetermined chemical composition, a microstructure at a location of ¼ of a sheet thickness and at a location of 100 μm from a surface comprising, in area %, one or more of martensite and tempered martensite: 95% or more in total, and ferrite, bainite and pearlite: 5% or less in total, and an average dislocation density at the location of 100 μm from the surface is 1.2 times or more of an average dislocation density at the location of ¼ of the sheet thickness.
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