【摘要】 利用多弧离子镀技术在暖通用316L不锈钢表面制备了一种同时具备高硬度与低摩擦系数的AlCrN涂层,研究不同转速下涂层的组织和摩擦性能,并进行不同氧化温度性能测试。研究结果表明:涂层元素组成基本不会受到转速的影响。当转速增加后,得到的颗粒密度也随之降低。涂层形成了致密的截面组织,未形成柱状晶,涂层厚度基本都介于3.3～4.1μm范围内。当转速增加后,涂层的硬度不断升高,硬度最大可以达到3968 HV。随着转速增加,摩擦系数快速降低后变化趋于稳定。经过700℃氧化处理后,之前的氮化物衍射峰已经不存在,此时涂层已全部完成氧化。经过氧化的涂层发生了硬度快速减小的现象,涂层摩擦系数由0.455上升高为0.612以上。更多还原

【Abstract】 The AlCrN coatings were synthesized by multi-arc ion plating on substrate of 316 L stainless steel,a material for fabrication of heating,ventilation and air-conditioning(HAVC) equipment.The influence of the substrate rotation speed on the microstructures,phases and tribological behavior was investigated with X-ray diffraction,scanning electron microscopy and mechanical tools.The results show that the rotation speed had a major impact.For instance,as the speed increased,the grain density of the AlCrN coatings decreased; the hardness increased,reaching a maximum of 3968 HV; the friction coefficient changed in a decrease-constant manner.A complete oxidation of AlCrN coatings at 700℃ significantly decreased the hardness and depleted the nitride phase,accompanied by an increase of friction coefficient from 0.455 to over 0.612.The thickness of the fairly compact AlCrN coatings was estimated to be 3.3 μm to 4.1 μm,and no columnar grain was observed.更多还原