	US 11,939,650 B2
	Hot-rolled steel sheet
Shohei Yabu, Tokyo (JP); Kunio Hayashi, Tokyo (JP); Yuji Yamaguchi, Tokyo (JP); Marina Mori, Tokyo (JP); Naoki Inoue, Tokyo (JP); and Genki Abukawa, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/295,298
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Nov. 20, 2019, PCT No. PCT/JP2019/045397 § 371(c)(1), (2) Date May 19, 2021, PCT Pub. No. WO2020/110855, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-222296 (JP), filed on Nov. 28, 2018.
Prior Publication US 2022/0389545 A1, Dec. 8, 2022
Int. Cl. C22C 38/06 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01)

CPC C22C 38/06 (2013.01) [C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 9/46 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C21D 2201/05 (2013.01)]

5 Claims

1. A hot-rolled steel sheet comprising: a chemical composition consisting of, by mass %,

0.030 to 0.400% of C;

0.050 to 2.5% of Si;

1.00 to 4.00% of Mn;

0.001 to 2.0% of sol.Al;

0 to 0.20% of Ti;

0 to 0.20% of Nb;

0 to 0.010% of B;

0 to 1.0% of V;

0 to 1.0% of Cr;

0 to 1.0% of Mo;

0 to 1.0% of Cu;

0 to 1.0% of Co;

0 to 1.0% of W;

0 to 1.0% of Ni;

0 to 0.01% of Ca;

0 to 0.01% of Mg;

0 to 0.01% of REM;

0 to 0.01% of Zr;

limited to 0.020% or less of P;

limited to 0.020% or less of S;

limited to 0.010% or less of N; and

a balance of Fe and impurities, and

wherein, when a surface region is from a sheet surface to 1/10 of a sheet thickness, an average of pole densities in a crystal orientation group consisting of {110}<110>to {110}<001>in the surface region is 0.5 to 3.0, and a standard deviation of the pole densities in the crystal orientation group is 0.2 to 2.0, and

wherein a tensile strength is 780 to 1370 MPa.