| 摘要 |
Provided is a high carbon hot-rolled steel sheet with excellent hardenability and minimal in-plane anisotropy, characterized by: containing by mass 0.20-0.48% C, at most 0.1% Si, at most 0.5% Mn, at most 0.03% P, at most 0.01% S, at most 0.10% sol.Al, at most 0.005% N, and 0.0005-0.0050% B, the remainder having a composition comprising Fe and unavoidable impurities; having a microstructure comprising ferrite and cementite, the average particle size of the cementite being no greater than 1.0µm; and the absolute value of the in-plane anisotropy (Deltar) for a value (r) being no greater than 0.1; also provided is a method for producing the steel sheet. |
