CPC B22F 3/105 (2013.01) [B22F 3/004 (2013.01); B22F 3/14 (2013.01); B22F 9/04 (2013.01); C22C 33/0292 (2013.01); C22C 38/00 (2013.01); B22F 2003/1051 (2013.01); B22F 2009/043 (2013.01); B22F 2301/35 (2013.01); B22F 2302/05 (2013.01)] | 15 Claims |
1. A Fe-based sintered body comprising:
a matrix containing Fe as a main component; and
a dispersed phase in the matrix,
the matrix being formed in a network shape and containing αFe,
the dispersed phase including a hard phase containing TiC, the hard phase having a ring shape or a ring-like shape, and
the hard phase having a width of not more than 1.0 μm in a direction perpendicular to a circumferential direction of the hard phase,
wherein the matrix accounts for not less than 60% by mass in the Fe-based sintered body, and the matrix has a cementite content of not more than 5% by mass, and wherein the Fe-based sintered body has a surface portion which is exposed to outside and an inside portion which is present closer to a center as compared to the surface portion, and the surface portion has a higher hardness than the inner portion.
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