US 9,849,511 B2 · Method of producing a Cu-based sintered sliding member

Abstract

A Cu-based sintered sliding member that can be used under high-load conditions. The sliding member is age-hardened, including 5 to 30 mass % Ni, 5 to 20 mass % Sn, 0.1 to 1.2 mass % P, and the rest including Cu and unavoidable impurities. In the sliding member, an alloy phase containing higher concentrations of Ni, P and Sn than their average concentrations in the whole part of the sliding member, is allowed to be present in a grain boundary of a metallic texture, thereby achieving excellent wear resistance. Hence, without needing expensive hard particles, there can be obtained, at low cost, a Cu-based sintered sliding member usable under high-load conditions. Even more excellent wear resistance is achieved by containing 0.3 to 10 mass % of at least one solid lubricant selected from among graphite, graphite fluoride, molybdenum disulfide, tungsten disulfide, boron nitride, calcium fluoride, talc and magnesium silicate mineral powders.

Claims7

Dependent claims

A method of producing a Cu-based sintered sliding member comprising the steps of:

preparing a mixed compound by mixing 5 to 30% by mass of Ni, 5 to 20% by mass of Sn, 0.1 to 1.2% by mass of P and the rest including Cu and unavoidable impurities;
mixing with the mixed compound 0.3 to 10% by mass of at least one solid lubricant selected from among graphite fluoride, tungsten disulfide, calcium fluoride, talc and magnesium silicate mineral powders;
adding 0.5% by mass of zinc stearate to the mixed compound and then mixing together using a V-type mixer;
producing a green compact by pressure molding the resultant mixed compound;
producing a sintered compact by sintering the green compact in an atmosphere of an endothermic gas;
sizing the sintered compact;
allowing the sintered compact to go through an aging treatment in a non-oxidizing atmosphere;
and
impregnating the Cu-based sintered sliding member with a synthetic oil.

6 more elements

Dependencies are inferred from the claim text.

Method of producing a Cu-based sintered sliding member

Life of this patent

Method of producing a Cu-based sintered sliding member

Life of this patent

Abstract

Claims7