CPC F16C 33/121 (2013.01) [C21D 9/40 (2013.01); C22C 14/00 (2013.01); F16C 2204/42 (2013.01)] | 22 Claims |
1. A mechanical component made of a titanium alloy and having a surface, the mechanical component comprising a plurality of primary a crystal grains and a plurality of secondary a crystal grains,
at the surface, the primary a crystal grains having an area ratio of 10% or more and 30% or less,
at the surface, the secondary a crystal grain having a major diameter of 75 μm or less and a minor diameter of 10 μm or less,
at the surface, the titanium alloy forming a solid solution including 1% by mass or more of oxygen,
wherein a titanium oxide is removed from the surface so as to expose the solid solution, and
wherein the solid solution has a hardness of 650 Hv or more at the surface.
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