SLEEVE AND THRUST PLATE FOR DYNAMIC PRESSURE BEARING MADE OF COPPER ALLOY HAVING EXCELLENT ABRASION- RESISTANT PROPERTY

摘要

PROBLEM TO BE SOLVED: To provide a sleeve and a thrust plate made of copper alloy with an excellent abrasion-resistant property in a dynamic pressure bearing. SOLUTION: The sleeve and thrust plate for dynamic pressure bearing made of copper alloy with an excellent abrasion-resistant property are constituted by a copper alloy containing Zn: 40-44 mass %, if necessary, Mn: 1-5 mass % and a remainder comprising Cu and inevitable impurities. The copper alloy has a composition that the inevitable impurities are limited to 0.5 mass % or less and has a grounding organization of α+β phase (phase: 10-50%).