| 摘要 |
In a rotary compressor (1), a parent material of a vane is a steel material containing chromium, a single coating layer of chromium as a first layer, an intermediate coating layer having a concentration gradient of chromium and carbon as a second layer, and a diamond-like carbon coating layer as a third layer are formed on a sliding surface with respect to a annular piston, in order starting from the surface of the parent material, and the intermediate coating layer has a chromium concentration higher than a carbon concentration on the first layer side and has the carbon concentration higher than the chromium concentration on the third layer side. |
