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.
|ホスト出版物のタイトル||2004 SAE World Congress|
|出版ステータス||Published - 2004 1月 1|
|イベント||2004 SAE World Congress - Detroit, MI, United States|
継続期間: 2004 3月 8 → 2004 3月 11
|Conference||2004 SAE World Congress|
|Period||04/3/8 → 04/3/11|
ASJC Scopus subject areas