COPPER-BASED SINTERED SLIDING MEMBER

摘要

Provided is a copper-based sintered sliding member that can be used in high-load usage environments. The provided copper-based sintered member, which is age-hardened, comprises 5-30% nickel, 5-20% tin, and 0.1-1.2% phosphorus by mass, with the remainder comprising copper and unavoidable impurities. Abrasion resistance is excellent due to the existence of an alloy phase, at grain boundaries, having higher nickel, phosphorus, and tin concentrations than the mean nickel, phosphorus, and tin concentrations across the entire sintered alloy. This results in reduced cost, as expensive hard particles are not needed, and allows a copper-based sintered sliding member that can be used in high-load usage environments. Even better abrasion resistance can be obtained by including 0.3-10% by mass of at least one of the following solid lubricants: graphite, graphite fluoride, molybdenum disulfide, tungsten disulfide, boron nitride, calcium fluoride, talc, and magnesium silicate mineral powder.