Sintered sprocket
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorAkira Fujiwara
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Abstract
A sintered sprocket is provided in which surface pressure resistance can be improved without using a forging processing. An Fe-based sintered alloy which contains C at 0.2 to 0.5% by weight, Mo at 0.2 to 1.0% by weight, and Ni at 0.2 to 1.0% by weight, and which exhibits a metallic structure in which an internal base layer comprises ferrite and bainite and in which the ferrite adjoins voids, is subjected to a rolling and is then subjected to carburizing and hardening.
Claims8
A sintered sprocket consisting of an Fe-based sintered alloy containing C at 0.2 to 0.5% by weight, Mo at 0.2 to 1.0% by weight, and Ni at 0.2 to 1.0% by weight, and exhibiting a metallic structure in which an internal base layer comprises ferrite and bainite and in which said ferrite adjoins voids.
A production method for a sintered sprocket comprising:
- rolling an Fe-based sintered alloy, and
- carburizing and hardening said Fe-based sintered alloy,
- wherein said Fe-based sintered alloy contains C at 0.2 to 0.5% by weight, Mo at 0.2 to 1.0% by weight, and Ni at 0.2 to 1.0% by weight, and exhibits a metallic structure in which an internal base layer comprises ferrite and bainite and in which said ferrite adjoins voids.
Dependencies are inferred from the claim text.