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US 9,434,005 B2Granted
Pb-free copper-alloy sliding material, and plain bearing
AssigneeTaiho Kogyo Co., Ltd.
InventorsHiromi Yokota, Ryo Mukai, Shinichi Kato, Nahomi Hamaguchi
Life of this patent
Estimating the term…
Abstract
A method of producing a Pb-free copper-alloy sliding material containing 1.0 to 15.0% of Sn, 0.5 to 15.0% of Bi and 0.05 to 5.0% of Ag, and Ag and Bi from an Ag—Bi eutectic. If necessary, at least one of 0.1 to 5.0% of Ni, 0.02 to 0.2% P, 0.5 to 30.0% of Zn, and 1.0 to 10.0 mass % of at least one of a group consisting of Fe3P, Fe2P, FeB, NiB and AlN may be added.
Claims9
A method for producing a Pb-free sintered copper-alloy sliding material, comprising:
- preparing a copper alloy powder consisting of, by mass percentage, 1.0 to 15.0% of Sn, 2 to 10% of Bi and 0.05 to 5.0% of Ag, with the balance being Cu and unavoidable impurities;
- heating said copper alloy powder to a temperature in a range of 700 to 900 degrees C.;
- and,
- cooling said copper alloy, in which said Sn, Bi and Ag are dissolved in solid copper alloy, under a condition that said Ag and Bi form an Ag—Bi eutectic, and neither Ag nor Bi are essentially dissolved in a Cu matrix, and Ag and Bi are not precipitated in a morphology except for said Ag—Bi eutectic.
1 more element
A method for producing a Pb-free sintered copper-alloy sliding material comprising:
- preparing a copper alloy powder consisting of, by mass percentage, 1.0 to 15.0% of Sn, 2 to 10% of Bi, 0.05 to 5.0% of Ag, at least one of 0.1 to 5.0% of Ni, 0.02 to 0.2% P, and 0.5 to 30.0% of Zn, with the balance being Cu and unavoidable impurities;
- heating said copper alloy powder to a temperature in a range of 700 to 900 degrees C.;
- and,
- cooling said copper alloy, in which said Sn, Bi and Ag are dissolved in solid copper alloy, under a condition that said Ag and Bi form an Ag—Bi eutectic, neither Ag nor Bi are essentially dissolved in a Cu matrix, and Ag and Bi are not precipitated in a morphology except for said Ag—Bi eutectic.
1 more element
Dependencies are inferred from the claim text.