IRON-BASED SINTERED ALLOY VALVE SEAT

Title:

IRON-BASED SINTERED ALLOY VALVE SEAT

Document Type and Number:

WIPO Patent Application WO/2012/099239

Kind Code:

A1

Abstract:

The purpose of the present invention is to provide an iron-based sintered alloy valve seat that can be used in a DI-type internal combustion engine adapted for enhanced fuel economy, lower emissions, and higher output, the seat being highly wear-resistant across a wide temperature range. To achieve this purpose, the added amount of a solid lubricant dispersed in a base material for the iron-based sintered alloy valve seat is limited, and at least two types of hard particles of different hardness levels are dispersed in the base material, whereby high strength and self-lubricating properties are simultaneously obtained, and wear resistance is improved across a wide temperature range, even under no lubrication.

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Inventors:

TAKAHASHI RINTAROU (JP)
HENMI HIROJI (JP)
SHIKANAI SYUUICHI (JP)

Application Number:

PCT/JP2012/051191

Publication Date:

July 26, 2012

Filing Date:

January 20, 2012

Export Citation:

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Assignee:

RIKEN KK (JP)
TAKAHASHI RINTAROU (JP)
HENMI HIROJI (JP)
SHIKANAI SYUUICHI (JP)

International Classes:

F01L3/02; B22F1/00; B22F5/00; C22C27/04

Foreign References:

JP2002129296A	2002-05-09
JP2006299404A	2006-11-02
JP2006193831A	2006-07-27
JP2001316780A	2001-11-16
JP2001050020A	2001-02-23
JP2003166025A	2003-06-13

Other References: