钢球表面制备复合碳基薄膜工艺研究

Study on Technology for Preparation of Composite Carbon-Based Thin Films on Surface of Steel Balls

通过工装设计和工艺配合,在钢球表面制备非晶碳基薄膜,研究薄膜的结构、膜基结合力、摩擦学性能以及钢球表面制备非晶碳基薄膜的均匀性、表面粗糙度、膜层附着性和承载性。结果表明:薄膜由柱状的Cr N层和非晶态的碳基薄膜层组成;薄膜与基体之间的膜基结合力可达58 N;薄膜的摩擦因数较无膜基体降低80%,磨痕宽度减小约85%;在钢球表面制备的非晶碳基薄膜的均匀性较好,且能保持材料的纳米级光滑表面形貌,与基体的附着力能达到HF1级。经模拟工况测试可知,镀膜后钢球的抗压缩性能良好,完全满足使用需求。

The amorphous carbon - based thin films are prepared on surface of steel balls through tooling design and process coordination, the structure, adhesion between film and substrate, tribological properties and homogeneity, sur-face roughness, adhesiveness of film layer and carrying capacity of amorphous carbon - based thin films on surface of steel balls are studied. The results show that the thin films consist of columnar CrN layer and amorphous carbon - based thin film layer. The adhesion between film and substrate reaches to 58 N. The friction coefficient of thin films is de-creased by 80% when compared with filmless substrate, and the width of wear scar is reduced by 8 5%. The amorphous carbon - based thin films on surface of steel balls have good uniformity, and the nanoscale smooth surface morphology of materials is kept. The adhesive force between film and substrate reaches to HF1 level. The simulated operating condi-tion test shows that the steel balls after coating have good resistance to compression, and the application requirements are fully met.