【摘要】 回顾了汽车发动机气阀座圈材料的发展进程及特点，分析了工作温度、燃料成份、阀座材质对阀座使用寿命的影响，介绍了国内外阀座材料的应用现状，并展望了发展趋势。更多还原

【Abstract】 This paper reviews the developing process and feature of valve seat materials, analyses the influences of temperature, composition of fuel and valve seat material on the life of valve seat, introduces the applied state and predicts the developing tendency of valve seat materials. Keyword: Automobile; Engine; Valve seat insert; Material更多还原