应用二次旋转组合试验进行试验设计 ,建立了喷砂距离、喷砂压力、喷砂角度与涂层和基体间结合强度的数学模型。通过降维分析法分析了双因素组合与结合强度之间的关系。结果表明 :选用优化的预处理工艺进行粗化 ,可提高电弧喷涂涂层与基体铸铁的结合强度 ,满足一般使用要求 The experimental design was carried out by using the combination of secondary rotation test. The mathematical models of sandblasting distance, sandblasting pressure, blasting angle and bonding strength between coating and substrate were established. The relationship between the two-factor combination and the bond strength was analyzed by dimensionality reduction analysis. The results show that the optimized pretreatment process for roughening can improve the bonding strength between the arc spraying coating and the matrix cast iron and meet the general requirements