WIRE FOR PISTON RING AND ITS MANUFACTURE

Title:

WIRE FOR PISTON RING AND ITS MANUFACTURE

Document Type and Number:

Japanese Patent JPH0525591

Kind Code:

A

Abstract:

PURPOSE: To provide a wire for a piston ring by powder metallurgy method particularly excellent in wear resistance and burning resistance and a manufacturing method therefor.

CONSTITUTION: This is a wire for a piston ring constituted of, by weight, 1.6 to 2.8% C, ≤2.0% Si, ≤2.0% Mn, 10.0 to 30.0% Cr and the balance Fe with inevitable impurities and having features that the grain size of carbides therein is regulated to ≤6μm and the total forging ratio to ≥10. In addition to the above alloy compsn., one or ≥ two kinds among V, Nb, Mo and W and, furthermore, one or ≥ two kinds of Co and Ni can independently or compositely be added. As for its manufacturing method, the powder of the alloy is formed into a compacted sintered body and is subjected to hot working and warm working into wire rod.

Inventors:

NAKAMURA KEN

Application Number:

JP17425791A

Publication Date:

February 02, 1993

Filing Date:

July 16, 1991

Export Citation:

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Assignee:

HITACHI METALS LTD

International Classes:

B22F5/02; B22F5/12; C22C38/00; C22C38/36; F16J9/26; (IPC1-7): B22F5/02; C22C38/00; C22C38/36; F16J9/26

Attorney, Agent or Firm:

Oba Mitsuru

Next Patent: RARE EARTH MAGNET MATERIAL