Hot-rolled steel sheet
AssigneeNippon Steel Corporation
InventorsTakashi YASUTOMI, Yuto TSUGE, Tatsuhiro HATTORI, Masafumi AZUMA
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AssigneeNippon Steel Corporation
InventorsTakashi YASUTOMI, Yuto TSUGE, Tatsuhiro HATTORI, Masafumi AZUMA
Estimating the term…
This hot-rolled steel sheet has a predetermined chemical composition, in a crystal orientation distribution function of a texture in a surface layer region, a maximum value A within a range of Φ=0 to 60° and φ1=50 to 90° in a cross section of φ2=45° is 6.0 or less, a maximum value B within a range of Φ=120 to 180° and φ1=50 to 90° in the cross section of φ2=45° is 6.0 or less, |ΦA−35°| is 10° or less, and |ΦB−145°| is 10° or less, and in a microstructure at a position of ¼ depth from the surface in the sheet thickness direction, the area ratio of a region having a GAM value of more than 0.6° is 50% or more, and the sum of the area ratio of a region having a GAM value of more than 3.0° and the area ratio of residual austenite is less than 15%.
A hot-rolled steel sheet having a chemical composition comprising, in mass %,
Dependencies are inferred from the claim text.