适应汽油无铅化的高铬铸铁排气阀座

Exhaust Valve Seat Made of High－Chromium Cast Iron Suitable for Leadfree Gasoline

为适应汽油无铅化及汽车排气净化装置的要求，开发出了高铬铸铁排气阀座。此种阀座的耐磨性显著提高，具有广泛的适用性。

In order to be suitable for the leadfree gasoline and meet the demand of automotive exhaust gas equipment, exhaust valve seat made of high－chromium cast iron is developed. Its wear resistance is markedly improved. And the exhaust valve seat can be widely used.