| 摘要 |
PURPOSE:To make it possible to form the combination of sliding members which has excellent wear and abrasion resistance, and seizure resistance by distributing harder rigid particles on the second sliding member with a relatively small contact area which slides on the first sliding member with a relatively large contact area. CONSTITUTION:A first sliding member with a relatively large contact area is aluminum alloy which is composed of a fixed weight percent of silicon, copper, magnesium and lead, and aluminum substantially forming the remainder. A second sliding member with a relatively small contact area is a composite material having a metallographic structure which is composed of a fixed weight percent of the silicon, transition metals, the copper and the magnesium, and the aluminum substantially forming the remainder, and has hard rigid particles distributed in an aluminum alloy base with very fine distributed primary crystal silicon or eutectic silicon. Therefore, in the second sliding member, the hard rigid particles form projections on the other part to reduce the wear of the said member during its sliding, and the other aluminum-silicon alloy base forms recesses to easily hold an oil film and thereby prevent the sliding members from seizing. |
