The development of a cobalt-free exhaust valve seat insert

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

doi:10.4271/2004-01-0502

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 proceeding › Conference contribution

2 Citations (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 language	English
Title of host publication	2004 SAE World Congress
Publisher	SAE International
ISBN (Print)	0768013194, 9780768013191
DOIs	https://doi.org/10.4271/2004-01-0502
Publication status	Published - 2004
Externally published	Yes
Event	2004 SAE World Congress - Detroit, MI, United States Duration: 2004 Mar 8 → 2004 Mar 11

Conference

Conference	2004 SAE World Congress
Country/Territory	United States
City	Detroit, MI
Period	04/3/8 → 04/3/11

ASJC Scopus subject areas

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

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10.4271/2004-01-0502

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title = "The development of a cobalt-free exhaust valve seat insert",

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.",

author = "Hiroki Fujitsuka and Hideaki Kawata and Mitsushi Oyanagi and Tomonori Miyazawa and Akira Fujiki",

year = "2004",

doi = "10.4271/2004-01-0502",

language = "English",

isbn = "0768013194",

booktitle = "2004 SAE World Congress",

publisher = "SAE International",

note = "2004 SAE World Congress ; Conference date: 08-03-2004 Through 11-03-2004",

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TY - GEN

T1 - The development of a cobalt-free exhaust valve seat insert

AU - Fujitsuka, Hiroki

AU - Kawata, Hideaki

AU - Oyanagi, Mitsushi

AU - Miyazawa, Tomonori

AU - Fujiki, Akira

PY - 2004

Y1 - 2004

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85072422278&partnerID=8YFLogxK

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U2 - 10.4271/2004-01-0502

DO - 10.4271/2004-01-0502

M3 - Conference contribution

AN - SCOPUS:85072422278

SN - 0768013194

SN - 9780768013191

BT - 2004 SAE World Congress

PB - SAE International

T2 - 2004 SAE World Congress

Y2 - 8 March 2004 through 11 March 2004

ER -

The development of a cobalt-free exhaust valve seat insert

Abstract

Conference

ASJC Scopus subject areas

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