【作者】 马静波；

【导师】 赵永武；

【作者基本信息】 江南大学 ， 机械设计及理论， 2007， 硕士

【摘要】 本文以磨床主轴颈/轴瓦的应用为基本出发点,利用等离子喷涂工艺,着重以TiO₂涂层为研究对象,以锡青铜和GCr15钢为对磨材料,对涂层/锡青铜、涂层/GCr15、20Cr（未喷涂主轴）/锡青铜摩擦副在不同工况下的摩擦磨损性能进行了一系列系统、细致的研究。利用维氏显微硬度计、万能试验机等工具,对涂层的显微硬度、厚度、结合强度、表观气孔率等作了研究;利用扫描电镜和能谱仪等现代分析工具,对磨损前后涂层的微观形貌和表面成份进行了分析、测定。研究结果表明:（1）喷有涂层的主轴能有效的提高主轴的使用寿命,大大降低了主轴的磨损率。（2）涂层/锡青铜摩擦副特别适用于高载高速。（3）采用抗磨液压油,在低载情况下能有效降低涂层和锡青铜的磨损率。（4）采用涂层/GCr15钢能有效的降低对磨材料的磨损率。但是这在大多数情况下也造成了涂层磨损率的上升。对涂层/锡青铜摩擦副的摩擦磨损机理进行了重点研究,并且创建了接触模型、碰撞模型、摩擦系数模型、磨损率模型这种系统分析其摩擦磨损特性的模型。该模型能够很好的解释试验现象。在分析摩擦磨损机理的过程中,认为可以把真实接触表面分成转移膜-氧化膜、涂层-氧化膜、涂层-锡青铜三部分的共同作用,起支配作用的部分由涂层表面的瞬时温度来确定。在模型中,引入了新鲜暴露涂层或金属表面率η、实际接触两表面的剪切力τ和与载荷、温度有密切关系的参数ζ等。更多还原

【Abstract】 Base on the application of the spindle and bush, using plasma-spraying technology, the frictional and wear properties of TiO2 coating/tin Bronze、TiO₂ coating/ GCr15 steel and 20Cr steel / tin Bronze were investigated systemically.The micro hardness、thickness、bonding strength and apparent porosity of coating was measured. The topography of the wear coating is investigated by SEM. And the EDAX is used to analyze the structure of the micro-contact area after the wear experiment.The results show that spindles, which were covered by TiO2 coating, have the longer life, the lower wear velocity and the better properties. TiO2 coating/tin Bronze can be used under the high press and high velocity condition. Antiwear hydraulic oil has an obvious effect on reducing the wear velocity of TiO₂ coating and tin Bronze. It is useful of GCr15 steel to reduce the wear velocity as the bush material.The paper presented a model to explain the above frictional and wear mechanism. The model including contact, collision, friction and wear can explain the experimental data well. Three categories of contact on rubbing surfaces are distinguished: transfer film-oxide film、coating- oxide film、coating- tin Bronze. Each category of contact is of a probability distribution on the real contact area due to its randomness. In the model, some parameters are introduced in, such asη, which is the nascently exposed metallic or coating surface probability;τ, which is shearing strength between the contact surfaces; andζ, which has the relation with the temperature and the press.更多还原