Hot-pressed member and method for manufacturing same, and cold-rolled steel sheet for hot pressing and method for manufacturing same

A hot-pressed member comprising:

• a steel chemical composition containing, by mass %, C:
• 0.28% or more and less than 0.42%, Si:
• 1.5% or less, Mn:
• 1.1% or more and 2.4% or less, P:
• 0.05% or less, S:
• 0.005% or less, Al:
• 0.01% or more and 0.50% or less, N:
• 0.010% or less, Nb:
• 0.005% or more and 0.15% or less, and Ti:
• 0.005% or more and 0.15% or less, with the balance being Fe and inevitable impurities;
• a microstructure in which
• a prior austenite average grain size is 7 μm or less within a range of 50 μm or less in a thickness direction from a surface of the member, a volume fraction of martensite is 90% or more, an average intergrain distance of Nb and Ti carbonitrides having a grain size of less than 0.10 μm within a depth range of 20 μm to 100 μm in the thickness direction from the surface of the member is 5 μm or less;
• and
• a tensile strength of 1780 MPa or more.