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Title:
IRON-COPPER-BASED OIL-IMPREGNATED SINTERED BEARING AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2018/021501
Kind Code:
A1
Abstract:
Provided are a novel iron-copper-based oil-impregnated sintered bearing and a method for manufacturing the same, the bearing having minimal hard iron alloy phases and excellent wear resistance and cost performance in a low-rotation, high-load usage condition such as in the output shaft of an electric motor for an automobile. An iron-copper-based oil-impregnated sintered bearing including 10-55% by mass of Cu, 0.5-7% by mass of Sn, 0-4% by mass of Zn, 0-0.6% by mass of P, and 0.5-4.5% by mass of C, the remainder comprising Fe and unavoidable impurities, wherein the area ratio of free graphite dispersed in a metal matrix thereof is 5-35%, the porosity thereof is 15% to 25%, and the hardness of an iron alloy phase in a base thereof is Hv 65-200. In the present invention, flake graphite powder and/or scaly graphite powder having an average particle diameter of 10-100 µm is used.

Inventors:
ISHII, Yoshinari (1-1 Koganecho 3-chome, Higashi-ku, Niigata-sh, Niigata 40, 〒9508640, JP)
TSUKADA, Yasuhiro (1-1 Koganecho 3-chome, Higashi-ku, Niigata-sh, Niigata 40, 〒9508640, JP)
OBATA, Tomoe (1-1 Koganecho 3-chome, Higashi-ku, Niigata-sh, Niigata 40, 〒9508640, JP)
Application Number:
JP2017/027339
Publication Date:
February 01, 2018
Filing Date:
July 27, 2017
Export Citation:
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Assignee:
DIAMET CORPORATION (1-1 Koganecho 3-chome, Higashi-ku Niigata-sh, Niigata 40, 〒9508640, JP)
International Classes:
B22F5/00; B22F1/00; C22C9/00; C22C33/02; C22C38/00; F16C33/12; F16C33/14
Foreign References:
JPH0941069A1997-02-10
JP2014025527A2014-02-06
JP2010077474A2010-04-08
JPH0949062A1997-02-18
Attorney, Agent or Firm:
USHIKI, Mamoru (3rd Fl, Yusei Fukushi Kotohira Bldg. 14-1, Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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