| 发明名称 |
PISTON RING AND MANUFACTURING METHOD THEREFOR |
| 摘要 |
A piston ring having a hard carbon film formed on at least an external peripheral sliding surface of a piston ring base material, the hard carbon film having an sp2 component ratio within a range of 40% to 80% inclusive as measured by a TEM-EELS spectrum which combines electron energy loss spectroscopy (EELS) with a transmission electron microscope (TEM), a hydrogen content being in a range of 0.1 at. % to 5 at. % inclusive, and an amount of macroparticles appearing on the surface being within a range of 0.1% to 10% inclusive by area ratio. The hard carbon film is formed on a hard carbon foundation film formed under low-speed film-forming conditions on the side of the piston ring base material, and the hard carbon foundation film is formed with an arc current value 80% or less of the arc current value during the formation of the hard carbon film. |
| 申请公布号 |
US2017002454(A1) |
申请公布日期 |
2017.01.05 |
| 申请号 |
US201515104660 |
申请日期 |
2015.01.30 |
| 申请人 |
NIPPON PISTON RING CO., LTD |
发明人 |
OZAKI Takuya;SUGIURA Hiroyuki |
| 分类号 |
C23C14/06;C23C14/32;F16J9/26;C23C14/02 |
主分类号 |
C23C14/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A piston ring having a hard carbon film formed on at least an external peripheral sliding surface of a piston ring base material, the piston ring comprising:
the hard carbon film having an sp2 component ratio within a range of 40% to 80% inclusive as measured by a TEM-EELS spectrum which combines electron energy loss spectroscopy (EELS) with a transmission electron microscope (TEM), a hydrogen content being within a range of 0.1 at. % to 5 at. % inclusive, and an amount of macroparticles appearing on the surface being within a range of 0.1% to 10% inclusive by area ratio. |
| 地址 |
Saitama-shi JP |
