Aluminum-based bearing alloy and production method of the same

Abstract

An Al-based bearing alloy containing 1 to 15 mass % of Si is provided. The Al-based bearing alloy includes Si particles, and a total length of circumference of the Si particles observed in an observation field of 37820 μm 2 on a slide side surface is 4000 to 6000 μm.

1 . An Al-based bearing alloy containing 1 to 15 mass % of Si, the Al-based bearing alloy including Si particles,
 wherein a total length of circumference of the Si particles observed in an observation field of 37820 μm 2  on a slide side surface is 4000 to 6000 μm.   
     
     
         2 . The Al-based bearing alloy according to  claim 1 , wherein when the observation field of 37820 μm 2  on the slide side surface is divided into regions by a region partitioning method, each region including one Si particle, an average aspect ratio of the regions is 1 to 2. 
     
     
         3 . A production method of an Al-based bearing alloy comprising steps of:
 melting Al or an Al alloy and Si to produce a molten alloy;   cooling the molten alloy at a rate of 80° C./sec to 130° C./sec to form an Al-based cast plate; and   rolling the Al-based cast plate at a reduction of 50% to 95% to produce the Al-based bearing alloy.