CYLINDER SLEEVE, AND CYLINDER BLOCK FOR INTERNAL- COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a cylinder sleeve where bonding property can be improved by the increase of the area of bonding between the inner peripheral surface of a sleeve and a plating layer and the heat of combustion gas applied to the plating layer can be rapidly dissipated by the increase of heat transfer area and, as a result, peeling of the plating layer can be practically prevented. SOLUTION: Aluminum alloy powder of 20-100μm average particle size is solidified with the addition of 15-38 wt.% silicon (Si). The sleeve 3 is formed by using a material obtained by solidifying and extruding the rapidly solidified powder, and initial-crystal silicon (Si) of <=20μm average particle size is formed. After alkali etching treatment is applied to the inner peripheral surface of the sleeve 3, plating is applied. Then the sleeve is disposed within a cylinder main body 2a made of aluminum-alloy casting to constitute a cylinder block 2 for internal-combustion engine.