| 发明名称 |
VALVE SEAT OF SINTERED IRON-BASED ALLOY |
| 摘要 |
The present invention provides a valve seat of a Co-free, sintered iron-based alloy having excellent heat resistance, oxidation resistance and wear resistance, as well as excellent machinability, which is usable for internal combustion engines using a gas fuel. The valve seat is produced by using a prealloy containing 12% or more by mass of Cr in a matrix for, and hard particles having high strength and hardness at high temperatures are used, such that the entire valve seat has a composition comprising by mass 5.0-20.0% of Cr, 0.4-2.0% of Si, 2.0-6.0% of Ni, 5.0-25.0% of Mo, 0.1-5.0% of W, 0.5-5.0% of V, 1.0% or less of Nb, and 0.5-1.5% of C, the balance being Fe and inevitable impurities. |
| 申请公布号 |
US2017089228(A1) |
申请公布日期 |
2017.03.30 |
| 申请号 |
US201515126683 |
申请日期 |
2015.02.10 |
| 申请人 |
KABUSHIKI KAISHA RIKEN |
发明人 |
SHIMADA Akiko;HENMI Hiroji |
| 分类号 |
F01L3/02;C22C38/46;C22C38/44;B22F7/00;C22C38/02;C22C38/00;B22F3/12;B22F5/00;C22C38/48;C22C38/04 |
主分类号 |
F01L3/02 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A valve seat of a sintered iron-based alloy having hard particles dispersed in a matrix, said valve seat having a composition comprising as a whole by mass 5.0-20.0% of Cr, 0.4-2.0% of Si, 2.0-6.0% of Ni, 5.0-25.0% of Mo, 0.1-5.0% of W, 0.5-5.0% of V, 1.0% or less of Nb, and 0.5-1.5% of C, the balance being Fe and inevitable impurities. |
| 地址 |
Tokyo JP |
