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用Ｘ射线衍射仪、扫描电镜、摩擦磨损试验等，研究了粉末冶金“金属布”及其钢表面改性技术在钢表面制备的ＷＣ－Ｎｉ系合金复合涂层的微观组织和性能。结果表明：该合金涂层中硬质相的体积含量可大于６０％；涂层的微观组织有两类：一种是在粘结相中均匀分布的碳化物与弥散分布的球状粘结相富集区构成的非均匀结构；另一种是碳化物和粘结相都均匀分布的均匀结构。碳化物分布区的硬度大于Ｈｖ１０７６，粘结相富集区的硬度在Ｈｖ９６７～Ｈｖ４５８之间。涂层与钢基体之间有几～几十微米的界面过渡区，形成剪切结合强度大于４００ＭＰａ的冶金结合。复合涂层的耐磨性明显优于调质Ｔ８工具钢。
The microstructure and properties of the WC-Ni alloy composite coating prepared on the steel surface by powder metallurgy “metal cloth” and its steel surface modification technology were studied by X-ray diffraction, scanning electron microscopy, friction and wear tests. The results show that the volume fraction of the hard phase in the alloy coating can be greater than 60%. The microstructure of the coating is divided into two types: one is the uniform distribution of carbides in the binder phase and the dispersed spherical binder phase The non-uniform structure of the assembly area; the other is uniform structure of the carbide and the binder phase are evenly distributed. The distribution of carbide hardness greater than Hv1076, the hardness of the bonding phase enrichment region between Hv967 ~ Hv458. Between the coating and the steel substrate a few to tens of microns interface transition zone, the shear bond strength of more than 400MPa metallurgical bond. The wear resistance of composite coating is obviously better than quenched and tempered T8 tool steel.