用化学镀方法在铸铁表面沉积上一层复合镀层，并分别用ＨＸ－２００维氏显微硬度计、Ｍ－２００型磨损试验机及自制的划痕试验机测定了复合镀层的硬度、耐磨性以及结合力。结果表明：Ｎｉ－Ｐ－Ｂ＿４Ｃ、Ｎｉ－Ｐ－金刚石粉复合镀层具有较高的硬度、高耐磨，但结合力数值较低。 Electroless plating was used to deposit a layer of composite coating on the surface of cast iron. The hardness and wear resistance of the composite coatings were measured by using HX-200 Vickers micro-hardness tester, M-200 wear tester and self-made scratch tester. Sex and cohesion. The results show that Ni-P-B_4C and Ni-P-diamond composite coatings have high hardness and high wear resistance, but their bonding strength is low.