摘要
针对钢-铜摩擦副类机械零件表面的磨损,研制了有减摩抗磨功能的锡类和锡锌复合类自修复添加剂。在摩擦试验中,润滑剂中的软金属微粒在机械作用下均能转移至铜表面上形成金属涂层。用俄歇能谱仪和扫描电镜分析了涂层表面的主要元素、涂层的形貌和厚度。测试结果表明,当润滑剂中的锡含量为20%时,涂层中锡的原子浓度接近80%,涂层厚度为10μm;若在润滑剂中同时加入锡和锌两种微粒,经摩擦形成的锡锌涂层厚度为20μm。锡脂和锡锌复合脂有较好的稳定性和防颗粒沉降性能。在MS-800摩擦磨损试验机上分别进行了纳米锡润滑剂、锡半流体脂和锡锌复合半流体脂的摩擦磨损特性,含锡量较高的涂层减摩抗磨性能较好,而加入锡锌两种添加剂形成的复合涂层具有更为优越的减摩特性。
Sn-based and Sn-Zn composite additives with self-repairing and anti-wear abilities to steel-copper pair were prepared. The composition, morphology, and thickness of the surface protective layer formed on the worn surfaces of the frictional pair were analyzed by means of Auger electron spectroscopy (AES) and scanning electron microscopy (SEM). The tribological properties of nano-Sn lubricant, Sn semi-liquid grease, and Sn-Zn compound semi-liquid grease were examined using an MS -800 tester. It was found that the soft metal particulates in the lubricant containing 20% of Sn could be transferred to the wom copper surface and form a surface-protective layer with a thickness of about 10 μm, while the surface-protective layer formed from the Sn-Zn composite lubricant was about 20 μm. Besides, Sn grease and Sn-Zn compound grease had better stability and a-bility to prevent sedimentation of particulates, and the lubricant with a higher content of Sn showed better anti-wear performance. And the compound lubricant containing Sn and Zn had better anti -wear and friction-reducing properties.
出处
《材料保护》
CAS
CSCD
北大核心
2008年第3期8-10,3,共3页
Materials Protection
基金
上海大学研究生创新基金资助项目(2007)
