| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low-cost hot rolled steel sheet stably obtaining a hardness of Hv200-260 in a hot-rolled state with excellent corrosion resistance and manufacturability. <P>SOLUTION: The Cr-containing hot rolled steel sheet contains, by mass%, 0.003-0.03% C, 0.8-3.0% Si, 0.1-0.8% Mn, 0.05-0.30% P, not more than 0.01% S, 11.0-14.5% Cr, 0.01-0.20% Ni, 0.01-0.20% V and 0.003-0.03% N, contains the above components satisfying the following formulae (1) and (2); 420C+470N+23Ni+9Cu+7Mn-11.5Cr-11.5Si-12Mo-47Nb-52Al-49Ti-23V+189≤55 (1), C+N≤0.05 mass% (2), and is in a range of 200-260 in Vickers hardness Hv, wherein each element symbol in the formulae is a content (mass%) of each element. <P>COPYRIGHT: (C)2012,JPO&INPIT |
