| 摘要 |
　The present invention provides a carburized component obtained by working into a component shape, and carburizing, steel having a composition comprising, by mass: 0.10 to 0.40% of C; 0.05 to 2.00% of Si; 0.30 to 2.00% of Mn; 0.30 to 3.00% of Cr; 0.025% or less of N; and one or more of 0.020 to 0.100% of Al, 0.01 to 0.20% of Nb, and 0.005 to 0.20% of Ti as a pinning-particle-forming element that forms a pinning particle by nitridation; with the remainder being made up by Fe and unavoidable impurities, the grain size number of the component surface layer up to 50 μm from the surface exceeding 5 and the grain size number of the component interior at a depth of 3 mm or more from the surface being 5 or less. |
