Back to results
US 10,208,368 B2Granted
Cold-rolled steel plate and method of manufacturing the same
AssigneeNisshin Steel Co., Ltd.
InventorsTomohiro Imanaka, Kouji Omosako, Masahito Suzuki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNisshin Steel Co., Ltd.
InventorsTomohiro Imanaka, Kouji Omosako, Masahito Suzuki
Estimating the term…
A cold-rolled steel plate having favorable heat spot resistance and favorable antiwear performance is provided. The cold-rolled steel plate has a chemical composition containing C from 0.03 to 0.12%, Si from 0 to 1.0% (including a case where Si is not added), Mn from 0.2 to 0.8%, P at 0.03% or less (excluding a case where P is not added), S at 0.03% or less (excluding a case where S is not added), Ti from 0.04 to 0.3%, and Al at 0.05% or less (excluding a case where Al is not added). A residue is formed of Fe and unavoidable impurities. Each element satisfies a relationship of 5*C %−Si %+Mn %−1.5*Al %<1 within the aforementioned range of the corresponding content. An average diameter of particles of a Ti-based carbide is from 20 to 100 nm. In this way, the Ti-based carbide is dispersed finely and uniformly, thereby enhancing heat spot resistance and antiwear performance.
A cold-rolled steel plate having enhanced heat spot resistance and antiwear performance with a chemical composition containing, on the basis of percent by mass, C from 0.03 to 0.12%, Si from 0 to 1.0%, Mn from 0.2 to 0.8%, P at 0.03% or less, S at 0.03% or less, Ti from 0.04 to 0.3%, and Al at 0.05% or less, with a residue being formed of Fe and unavoidable impurities, the chemical composition satisfying 5*C %−Si % +Mn %−1.5*Al %<1, wherein
Dependencies are inferred from the claim text.