目前国外的叶片泵产品中已有用铸铁定子代替钢件的趋势,但国内绝大多数叶片泵的生产厂家仍用38CrMoAlA材料。使这一材料改进难于推广的原因是多方面的,现就我们的试验情况谈些认识和看法,希望能引起有关主管部门和国内各厂家的重视,以利于推广。我们采用的是球墨铸铁材料,经辉光离子氮化后,由于氮的渗入表层硬度提高、耐磨性能显著改善,而这种离子氮化特别适用于铁素体——珠光体类型的铸铁。由于氮在铁素体中的 At present, foreign vane pump products have been used cast iron stator instead of the trend of steel, but the vast majority of vane pump manufacturers still use 38CrMoAlA material. The reasons for making this material difficult to promote are many. We are now going to make some comments and observations on our experimental conditions, hoping to draw the attention of relevant competent departments and domestic manufacturers so as to facilitate the promotion. We use nodular cast iron material, after glow ion nitriding, the wear resistance can be significantly improved due to the increased surface hardness of nitrogen infiltration, and this kind of ion nitriding is especially suitable for ferrite-pearlite type cast iron. Because of nitrogen in ferrite