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T_iC、T_1N、T_iCN等陶瓷涂层,摩擦系数低,超硬,耐磨耐蚀性很好。但单相涂层难以满足高的硬度和良好的韧性、涂层与基体高的界面强度和表面反应性弱等综合性能。所以CVD技术已由单相涂层向多相复合涂层发展.介绍CVD 7层复合涂层的研制,对涂层的组织结构和摩擦学性能进行了观测与对比试验。结果表明,7层复合涂层比单相涂层的相对耐磨性提高1.244倍;滚动接触疲劳的额定寿命提高了4倍。应用证明,硬质合金和高碳高合金钢工模具经CVD沉积多层复合涂层,使用寿命提高3～110倍,尤其是提高模具的抗粘着磨损能力,有效地改善了成品的表面粗糙度。CVD多层复合涂层显著提高了9Cr18不锈轴承钢的滚动接触疲劳寿命,
T_iC, T_1N, T_iCN and other ceramic coatings, low coefficient of friction, super-hard, good corrosion resistance. However, single-phase coating is difficult to meet the high hardness and good toughness, the coating and the substrate high interface strength and surface reactivity and other comprehensive performance. Therefore, CVD technology has been developed from single-phase coating to multi-phase composite coating.The development of CVD 7-layer composite coating is introduced, and the microstructure and tribological properties of the coating are observed and compared. The results show that the relative wear resistance of the seven-layer composite coating is 1.244 times higher than that of the single-phase coating, and the contact life of rolling contact fatigue is increased by four times. Application shows that carbide and high-carbon high-alloy steel mold by CVD deposition of multi-layer composite coating, the service life increased by 3 to 110 times, especially to improve the mold anti-adhesion wear, effectively improve the finished surface roughness . CVD multilayer composite coating significantly improves the rolling contact fatigue life of 9Cr18 stainless steel bearing steel,