Copper alloy for bearing and bearing
AssigneeTaiho Kogyo Co., Ltd.
InventorsYuhei EBATA, Shinji MATSUMOTO
Life of this patent
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Abstract
There are provided a copper alloy for a bearing and a bearing, which can prevent seizure in Mn-Si primary crystals. The copper alloy for a bearing and the bearing according to the present invention contain 25 wt % or more and 48 wt % or less of Zn, 1 wt % or more and 7 wt % or less of Mn, 0.5 wt % or more and 3 wt % or less of Si, and 1 wt % or more and 10 wt % or less of Bi, the balance consisting of inevitable impurities and Cu, and are characterized in that, in a sliding surface on which a counter material slides, the proportion of triangles having an area of 5000 μm2 or more and including no Bi particle with a circle equivalent diameter of 10 μm or more, among triangles having the closest three Mn-Si primary crystals as apices, is 20 % or less.
Claims2
A copper alloy for a bearing containing:
- 25 wt % or more and 48 wt % or less of Zn,
- 1 wt % or more and 7 wt % or less of Mn,
- 0.5 wt % or more and 3 wt % or less of Si, and
- 1 wt % or more and 10 wt % or less of Bi,
- the balance consisting of inevitable impurities and Cu,
- wherein, in a sliding surface on which a counter material slides, the proportion of triangles having an area of 5000 μm2 or more and including no Bi particle with a circle equivalent diameter of 10 μm or more, among triangles having the closest three Mn-Si primary crystals as apices, is 20% or less.
A bearing containing:
- 25 wt % or more and 48 wt % or less of Zn,
- 1 wt % or more and 7 wt % or less of Mn,
- 0.5 wt % or more and 3 wt % or less of Si, and
- 1 wt % or more and 10 wt % or less of Bi,
- the balance consisting of inevitable impurities and Cu,
- wherein, in a sliding surface on which a counter material slides, the proportion of triangles having an area of 5000 μm2 or more and including no Bi particle with a circle equivalent diameter of 10 μm or more, among triangles having the closest three Mn-Si primary crystals as apices, is 20% or less.
Dependencies are inferred from the claim text.