Abstract A copper-tin type sintered alloy for an oil-impregnated bearing excellent in bearing performance particularly as a bearing used in low-load and high-velocity region, having a chemical composition consisting essentially of, in weight percentage: -Tin from 8 to 11% -Phosphorus from 0.2 to 1.7% - at least one solid lubricant, having an average particle size of from 20 to 80 mu m, selected from the group consisting of: -Molybdenum disulfide from 1.1 to 11%, -and -Tungsten disulfide from 1.7 to 17%, - Where, the total amount of molybdenum disulfide and tungsten disulfide being up to 17%; and, the balance copper and incidental impurities; said sintered alloy being prepared by sintering a green compact having said chemical composition at a temperature of from 650 DEG to 750 DEG C. for 10 to 30 minutes; and, said sintered alloy including a copper-tin type sintered alloy for an oil-impregnated bearing, also containing at least one element selected from the group consisting of, in weight percentage: -Graphite from 0.2 to 0.8%, -Iron from 0.1 to 1%, -Lead from 0.5 to 5%, -and, -Zinc from 0.5 to 5%. -
A copper-tin type sintered alloy for an oil-impregnated bearing excellent in bearing performance particularly as a bearing used in low-load and high-velocity region, having a chemical composition consisting of, in weight percentage: ______________________________________
Tin from 8 to 11%;
Phosphorus from 0.2 to 1.7%;
______________________________________ at least one solid lubricant, having an average particle size of from 20 to 80 μm, selected from the group consisting of: ______________________________________
Molybdenum disulfide
from 1.1 to 11%,
and
Tungsten disulfide from 1.7 to 17%,
______________________________________ where, the total amount of molybdenum disulfide and tungsten disulfide being up to 17%; and the balance copper and incidental impurities; and said sintered alloy being prepared by sintering a green compact having said chemical composition at a temperature of from 650° to 750° C. for 10 to 30 minutes.
Claim 2
Dependent Claim
131 words
A copper-tin type sintered alloy for an oil-impregnated bearing excellent in bearing performance particularly as a bearing used in low-load and high-velocity region, having a chemical composition consisting of, in weight percentage: ______________________________________
Tin from 8 to 11%;
Phosphorus from 0.2 to 1.7%;
______________________________________ at least one solid lubricant, having an average particle size of from 20 to 80 μm, selected from the group consisting of: ______________________________________
Molybdenum disulfide
from 1.1 to 11%,
and
Tungsten disulfide from 1.7 to 17%,
______________________________________ where, the total amount of molybdenum disulfide and tungsten disulfide being up to 17%; and the balance copper and incidental impurities; and said sintered alloy being prepared by sintering a green compact having said chemical composition at a temperature of from 650° to 750° C. for 10 to 30 minutes.
Claim 3
Dependent Claim
46 words
The sintered alloy as claimed in claim 1, also containing at least one element selected from the group consisting of, in weight percentage: ______________________________________
Graphite from 0.2 to 0.8%,
Iron from 0.1 to 1%,
Lead from 0.5 to 5%,
and
Zinc from 0.5 to 5%.
______________________________________
Claim 4
Dependent Claim
30 words
The sintered alloy as claimed in any of claims 1 and 2, wherein said solid lubricant has an average particle size within the range of from 40 to 60 μm.