SPHEROIDAL GRAPHITE CAST IRON CUTTING METHOD, SPHEROIDAL GRAPHITE CAST IRON, SLIDING MEMBER, AND HYDRAULIC EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a spheroidal graphite cast iron cutting method that enables the coverage of graphite on the surface of spheroidal graphite cast iron by a plastic flow of a matrix structure in a small number of steps without using a special tool, and also to provide the spheroidal graphite cast iron that has the surface machined by the cutting method, a sliding member using the spheroidal graphite cast iron, and hydraulic equipment.;SOLUTION: The cutting method is composed so that at least one tool 5, having a main cutting blade 10 and an auxiliary cutting blade 11, is made to cut into the surface of a workpiece 7, being the spheroidal graphite cast iron, so as to execute surface modification of the workpiece 7 while moving the tool 5 and workpiece 7 relative to each other. A relative moving-speed between the tool 5 and workpiece 7 is set to be equal to or more than 600 m/min so as to cover the graphite 19 on the surface of the workpiece 7 with a plastic-flow layer 20 formed by making the surrounding matrix structure flow.;COPYRIGHT: (C)2008,JPO&INPIT