Sintered bearing
AssigneeNtn Corporation
InventorsToshihiko Mouri, Noriyoshi Yoshizuka, Yousuke Sugai, Fuminori Satoji
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Abstract
Provided is a sintered bearing (1) including an inner layer (2) and an outer layer (3) formed by integral molding, the sintered bearing (1) having a bearing surface (A) formed on an inner peripheral surface (2a) of an inner layer (2). The inner layer (2) is made of sintered metal containing Fe and a hardness increasing element (such as Ni or Mo). The outer layer (3) is made of sintered metal containing Fe and no hardness increasing element. A concentration gradient of the hardness increasing element is present at an interface between the inner layer (2) and the outer layer (3).
Claims7
A sintered bearing, comprising:
- an inner layer;
- and
- an outer layer formed on a radially outer side of the inner layer,
- the inner layer and the outer layer being formed by integral molding,
- the sintered bearing having a bearing surface formed on any one of an inner peripheral surface of the inner layer and an outer peripheral surface of the outer layer,
- wherein one of the inner layer and the outer layer, which has the bearing surface, is made of sintered metal containing Fe and a hardness increasing element, and another of the inner layer and the outer layer, which has no bearing surface, is made of sintered metal containing Fe and no hardness increasing element, and
- wherein a concentration gradient of the hardness increasing element is present at an interface between the inner layer and the outer layer.
Dependencies are inferred from the claim text.