公开(公告)号：US20240191332A1

公开(公告)日：2024-06-13

申请号：US18279539

申请日：2022-12-09

Applicant: TPR Co., Ltd.

Inventor： Koki Maeda ,  Fukutoshi Uchida

IPC: C22C38/58 ,  B22F3/00 ,  B22F3/16 ,  B22F3/26 ,  C22C33/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  F01L3/02

CPC classification number: C22C38/58 ,  B22F3/004 ,  B22F3/16 ,  B22F3/26 ,  C22C33/0242 ,  C22C33/0285 ,  C22C38/002 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  F01L3/02 ,  B22F2301/35 ,  B22F2998/10 ,  B22F2999/00

Abstract: 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.

公开(公告)号：US12049689B2

公开(公告)日：2024-07-30

申请号：US18279539

申请日：2022-12-09

Applicant: TPR Co., Ltd.

Inventor： Koki Maeda ,  Fukutoshi Uchida

IPC: C22C38/58 ,  B22F3/00 ,  B22F3/16 ,  B22F3/26 ,  C22C33/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  F01L3/02

CPC classification number: C22C38/58 ,  B22F3/004 ,  B22F3/16 ,  B22F3/26 ,  C22C33/0242 ,  C22C33/0285 ,  C22C38/002 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  F01L3/02 ,  B22F2301/35 ,  B22F2998/10 ,  B22F2999/00

Abstract: 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.