本文研究不同类型石墨的灰口铸铁的铸态与离子渗氮试样,以不同冲击速度下在海水与砂粒混合的介质中的腐蚀磨损的表面特征。试验表明:铸铁铸态试样的表面呈橙黄色,有高低不平的沟槽,冲击速度愈大,石墨片愈粗,沟槽明显;离子渗氮处理的铸铁试样的表现呈灰色,表面高低不平不明显,在试验时间内与冲击速度和石墨大小不明显。 In this paper, the different types of graphite gray cast iron as-cast and ion-nitrided specimens were studied for their surface wear characteristics under different impact velocities in seawater-sand mixed media. The results show that the surface of the as-cast iron castings is orange-yellow in color, with uneven grooves. The larger the impact velocity is, the thicker the graphite sheets are and the grooves are obvious. The cast iron samples treated with ion nitriding are gray and the surface is low Unevenness is not obvious, with the impact speed and graphite size is not obvious during the test period.