PISTON RING MATERIAL FOR INTERNAL COMBUSTION ENGINE

Title:

PISTON RING MATERIAL FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2007/123164

Kind Code:

A1

Abstract:

A piston ring material that when formed into a piston ring product, maintains excellent properties, and that at the production of piston ring rod, realizes excellent processability and shape stability. There is provided a piston ring material for internal combustion engine comprising, by mass, 0.5 to less than 0.7% C, 1.0% or less Si, 1.0% or less Mn, 12.0 to 16.0% Cr, 3.0% or less Mo and/or W (Mo+1/2W), 0.02 to 0.14% N and the balance Fe and unavoidable impurities, wherein the relationship of contained C, N and Cr satisfies the formulae: 25 ≤ 43.22C(%)+42.45N(%)-0.02Cr(%) ≤ 40, and 0.15 ≤ 0.92C(%)+0.67N(%)-0.03Cr(%) ≤ 0.30.

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Inventors:

OHISHI KATSUHIKO (JP)
UEHARA TOSHIHIRO (JP)
KUBOTA KUNICHIKA (JP)

Application Number:

PCT/JP2007/058482

Publication Date:

November 01, 2007

Filing Date:

April 19, 2007

Export Citation:

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Assignee:

HITACHI METALS LTD (JP)
OHISHI KATSUHIKO (JP)
UEHARA TOSHIHIRO (JP)
KUBOTA KUNICHIKA (JP)

International Classes:

C21D6/00; C22C38/00; C22C38/22; F02F5/00; F16J9/26; C22C38/60

Foreign References:

JP3456028B2	2003-10-14
JP2552509B2	1996-11-13
JPS5846542B2	1983-10-17
JP3452354B2	2003-09-29
JP2001271144A	2001-10-02
JP2002030394A	2002-01-31

Attorney, Agent or Firm:

ASAMURA, Kiyoshi et al. (New Ohtemachi Bldg. 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, JP)

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