Steel sheet and method for manufacturing same

A steel sheet comprising, as a chemical composition, by mass %:

• C:
• 0.020% to 0.090%;
• Si:
• 0.200% or less;
• Mn:
• 0.45% to 2.10%;
• P:
• 0.030% or less;
• S:
• 0.020% or less;
• sol. Al:
• 0.50% or less;
• N:
• 0.0100% or less;
• B:
• 0% to 0.0050%;
• Mo:
• 0% to 0.40%;
• Ti:
• 0% to 0.10%;
• Nb:
• 0% to 0.10%;
• Cr:
• 0% to 0.55%;
• Ni:
• 0% to 0.25%;
• and
• a remainder of Fe and impurities,
• wherein a metallographic structure in a surface layer region ranging from a surface to a position of 20 μm from the surface in a sheet thickness direction consists of ferrite and a secondary phase having a volume fraction of 0.01% to 5.0%,
• a metallographic structure in an internal region ranging from a position of more than 20 μm from the surface in the sheet thickness direction to a ¼ thickness position from the surface in the sheet thickness direction consists of ferrite and a secondary phase having a volume fraction of 2.0% to 10.0%,
• the volume fraction of the secondary phase in the surface layer region is less than the volume fraction of the secondary phase in the internal region, and
• in the surface layer region,
• an average grain size of the secondary phase is 0.01 μm to 4.0 μm, and
• a texture in which an XODF{001}/{111} as a ratio of an intensity of {001} orientation to an intensity of {111} orientation in the ferrite is 0.60 or more and less than 2.00 is included.