| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a steel sheet for soft nitriding treatment excellent in moldability and fatigue resistance. <P>SOLUTION: The steel sheet for soft nitriding treatment has a composition containing, by mass%, C: 0.05% or more and 0.10% or less, Si: 0.5% or less, Mn: 0.7% or more and 1.5% or less, P: 0.05% or less, S: 0.01% or less, Al: 0.01% or more and 0.06% or less, Cr: 0.5% or more and 1.5% or less, V: 0.03% or more and 0.30% or less, and N: 0.005% or less while a ratio between a solid solution V amount and the V content (solid solution V amount/V content) is 0.50 or more, and the balance Fe with inevitable impurities, and has a composite structure including ferrite and pearlite. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
