This paper reports the development and the application detail of cobalt-free, lead-free and environmentally friendly exhaustvalveseat insert.
这篇论文详细报道了无钴、无铅及有利于环境的排气阀座圈的开发与使用。
2
To enhance the anti-wearing ability of exhaustvalveseat for a new engine, a Nb-Cr-Mo-V cast iron value seat has been developed in the First Automobile Works.
为提高新型汽车发动机排气门座的耐磨性，第一汽车制造厂研制了铌铬钼钒铸铁排气门座。
3
In order to be suitable for the leadfree gasoline and meet the demand of automotive exhaust gas equipment, exhaustvalveseat made of high-chromium cast iron is developed.