PISTON RING AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a piston ring and its manufacturing method having excellent wear resistance and scuff resistance and low hostility to a mating material.

SOLUTION: A thermal-spray coating film consisted by a composite structure wherein equi-axed carbon particles having an average particle diameter of 2 μm or less are distributed in a metal matrix is provided at least on an outer peripheral side slideway.

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