公开(公告)号：EP4414469A1

公开(公告)日：2024-08-14

申请号：EP22940514.7

申请日：2022-12-09

申请人： TPR Co., Ltd.

发明人： MAEDA, Koki ,  UCHIDA, Fukutoshi

IPC分类号： C22C33/02 ,  F01L3/02

摘要： The present invention solves a novel problem of corrosive wear that occurs in the use of a valve seat in an internal combustion engine using a hydrogen gas fuel. The problem is solved by an iron-based sintered alloy valve seat used in an internal combustion engine using a hydrogen gas fuel, in which the Cr content is 6% by mass to 23% by mass, the Mo content is 5% by mass to 20% by mass, the Cu content is 10% by mass to 23% by mass, the Co content is 3% by mass or more, and a total content of Cr, Mo, and Co is 14% by mass to 47% by mass.