The development of a cobalt-free exhaust valve seat insert

Hiroki Fujitsuka, Hideaki Kawata, Mitsushi Oyanagi, Tomonori Miyazawa, Akira Fujiki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Generally, cobalt-contained sintered materials have mainly been applied for exhaust valve seat inserts (VSI). However, there is a trend to restrict the use of cobalt as well as lead environmental law, and cobalt is expensive. To solve these problems, a new exhaust VSI on the assumption of being cobalt and lead free, applicable for conventional engines, having good machinability, and with a reduced cost was developed. The new exhaust VSI is a material dispersed with two types of hard particles, Fe-Cr-C and Fe-Mo-Si, in the matrix of an Fe-3.5mass%Mo at the ratio of 15 mass % and 10 mass % respectively.

Original languageEnglish
Title of host publication2004 SAE World Congress
PublisherSAE International
ISBN (Print)0768013194, 9780768013191
DOIs
Publication statusPublished - 2004 Jan 1
Externally publishedYes
Event2004 SAE World Congress - Detroit, MI, United States
Duration: 2004 Mar 82004 Mar 11

Conference

Conference2004 SAE World Congress
CountryUnited States
CityDetroit, MI
Period04/3/804/3/11

    Fingerprint

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

Fujitsuka, H., Kawata, H., Oyanagi, M., Miyazawa, T., & Fujiki, A. (2004). The development of a cobalt-free exhaust valve seat insert. In 2004 SAE World Congress SAE International. https://doi.org/10.4271/2004-01-0502