IRON GROUP SINTERED ALLOY TWO-LAYER VALVE SEAT AND METHOD OF ITS MANUFACTURE

Title:

IRON GROUP SINTERED ALLOY TWO-LAYER VALVE SEAT AND METHOD OF ITS MANUFACTURE

Document Type and Number:

Japanese Patent JP2002115513

Kind Code:

A

Abstract:

To provide an iron group sintered alloy two-layer valve seat excellent in abrasion resistance and having a little opponent attacking property.

This iron group sintered alloy two-layer valve seat is composed of two layers of a valve abutting layer containing one or two kinds in 8 to 30 mass % of Cu, 0.3 to 2.0 mass % of C, 0.5 to 10 mass % of Ni and 0.5 to 13 mass % of Mo, containing 0.1 to 20 mass % in total of one kind or two or more kinds in Co, Cr, W, Si, V, Nb and Mn when necessary and having the remainder having the composition composed of Fe and an unavoidable impurity and a valve seat body layer containing 2 to 25 mass % of Cu and 0.3 to 1.6 mass % of C and having the remiander having the composition composed of Fe and an unavoidable impurity, and relatively increases a Cu quantity contained in the valve abutting layer more than a Cu quantity contained in the valve seat body layer.

Inventors:

KAWASE KINYA
ORITO KENJI
MORIMOTO KOICHIRO

Application Number:

JP2000308935A

Publication Date:

April 19, 2002

Filing Date:

October 10, 2000

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP

International Classes:

F01L3/02; B22F3/10; B22F7/00; C22C38/00; C22C38/16; C22C38/58; F16K25/00; (IPC1-7): F01L3/02; B22F3/10; B22F7/00; C22C38/00; C22C38/16; C22C38/58

Attorney, Agent or Firm:

Kazuo Tomita (1 person outside)

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