Oil-impregnated sintered bearing and method for manufacturing same
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United States of America Patent
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Aug 25, 2020
Grant Date -
Feb 21, 2019
app pub date -
Jan 27, 2017
filing date -
Feb 25, 2016
priority date (Note) -
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Abstract
An oil-impregnated sintered bearing (8) includes a copper-iron-based sintered compact containing 40 mass % or more of copper, and has inner pores impregnated with an oil. The sintered compact has: a copper structure derived from copper powder (13) of partially diffusion-alloyed powder (11) in which copper powder (13) having a particle diameter of 20 μm or less is diffused on and joined to a surface of iron powder (12) in advance; and a copper structure derived from elemental copper powder (14).
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