Document Type and Number:
Japanese Patent JPWO2022045351
Kind Code:
A1
Abstract:
A steel sheet in which: the chemical composition includes, in terms of mass%, 0.040-0.160% of C, 0.01-0.50% of Si, 0.70-2.50% of Mn, 0.030% or less of P, 0.020% of less of S, 0.001-0.100% of Al, 0.0010-0.0080% of N, and 0.003-0.050% of Nb, the balance being Fe and unavoidable impurities; the metal structure at a 1/4t position in a C-shaped cross-section includes 80 area% of more of bainite; the average longitudinal-direction length of bainitic ferrite constituting the bainite is 10 μm or less; the average thickness-direction length of old austenite grains at a 1/4t position in an L-shaped cross-section is 20 μm or less; the average aspect ratio is 2.5 or greater; the area ratio of {110} at a 1/10t position is 30-60%; the area ratio of {110} at a 1/4t position is 10-40%; and the area ratio of {110} at a 1/2t position is 40-70%.
Application Number:
JP2022505647A
Publication Date:
March 03, 2022
Filing Date:
August 31, 2021
Export Citation:
Domestic Patent References:
| JP2018090872A | 2018-06-14 | |||
| JP2020117779A | 2020-08-06 | |||
| JPH10306316A | 1998-11-17 | |||
| JP2018003062A | 2018-01-11 |
Foreign References:
| WO2009072559A1 | 2009-06-11 |