Title:
鉄系焼結合金製内燃機関用バルブガイド
Document Type and Number:
Japanese Patent JP4193969
Kind Code:
B2
Abstract:
Valve guides made of ferrous sintered alloy for internal combustion engines have improved durability of the valve stem without soft nitriding process. The valve guides include Cu: 8 to 20 mass %, C: 0.8 to 1.5 mass %, and at least one of MnS, WS2, and MoS2: 0.5 to 2 mass % and the balance of Fe, the valve guides have many pores, have a metal structure in which the copper phase dispersed in an iron pearlite matrix exists, and have a structure in which metal sulfides are dispersed between particles between the matrix and the copper phase.
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Inventors:
Katsunao Chikahata
Koichiro Hayashi
Katsuaki Sato
Koichiro Hayashi
Katsuaki Sato
Application Number:
JP2002004915A
Publication Date:
December 10, 2008
Filing Date:
January 11, 2002
Export Citation:
Assignee:
Hitachi Powdered Metals Co., Ltd.
Honda motor industry stock company
Honda motor industry stock company
International Classes:
C22C38/00; C22C38/16; F01L3/08
Domestic Patent References:
| JP10081943A | ||||
| JP4157140A |
Attorney, Agent or Firm:
Suenari Mikio