| 发明名称 | Piston ring | ||
| 摘要 | To provide a piston ring having a hard laminate coating for excellent scuffing resistance, wear resistance and peeling resistance, which can be used in an environment of high mechanical and thermal load in engines, the piston ring is provided with a hard laminate coating as thick as 10-60 μm on its outer peripheral surface, the laminate coating being formed by alternately laminating two types or more of layers made of different compounds, each of the compound layers being made of nitride of at least one metal selected from the group consisting of Ti, Cr, Zr, V, Hf and Al. | ||
| 申请公布号 | US9447879(B2) | 申请公布日期 | 2016.09.20 |
| 申请号 | US201314650115 | 申请日期 | 2013.12.06 |
| 申请人 | KABUSHIKI KAISHA RIKEN | 发明人 | Sato Masayuki;Murayama Yuuichi;Iwamoto Youhei |
| 分类号 | F16J9/26;F02F5/00;C23C14/06;C23C14/32;C23C28/04;C23C28/00 | 主分类号 | F16J9/26 |
| 代理机构 | Birch, Stewart, Kolasch & Birch, LLP | 代理人 | Birch, Stewart, Kolasch & Birch, LLP |
| 主权项 | 1. A piston ring having a hard coating as thick as 10-60 μm on an outer peripheral sliding surface thereof, said hard coating being formed by alternately laminating at least two kinds of layers; each of said at least two kinds of layers comprising a metallic nitride, each metal of the metallic nitride is selected from the group consisting of Ti, Cr, Zr, V, Hf and Al so that the selected metals of the metallic nitrides are different from each other; and said hard coating having hardness of 1159 Hv or more and 1423 Hv or less, wherein said hardness is measured at a test force of 0.9807 N. | ||
| 地址 | Tokyo JP | ||