不同环境介质下氧化铝陶瓷与耐蚀金属摩擦磨损行为

为优选海水淡化高压泵关键零部件耐磨性能材料,以Al_2O_3陶瓷与TC4钛合金、316不锈钢、2205双相不锈钢组成的配对摩擦副作为研究对象,利用立式万能摩擦磨损试验机开展干摩擦、纯水及海水3种环境介质下配对材料的摩擦磨损试验,定量得到各摩擦副摩擦因数、磨损量,并对摩擦试样的表面形貌进行分析;采用正交试验法分析载荷、转速、环境介质对摩擦因数和磨损量的影响规律。结果表明:在相同的条件下,TC4钛合金与陶瓷配副摩擦因数较小,2205双相不锈钢与陶瓷配副磨损量较小;环境介质对摩擦因数影响较大,载荷对磨损量的影响较大;海水环境下2205双相不锈钢和316不锈钢磨痕较浅,磨损机制为疲劳磨损、磨粒磨损和腐蚀磨损的交互作用。

Friction and Wear Behavior of Alumina Ceramics and Corrosion Resistant Metals in Different Environmental Media

The friction pairs of Al2O3 ceramics and TC4 titanium alloy,316 stainless steel,2205 duplex stainless steel were chosen to be the study subjects for optimizing wear resistance materials of desalination high pressure pump.The friction and wear test of matching materials were carried out under three conditions of dry friction,pure water and seawater environmental media by using the vertical universal friction and wear testing machine.The friction coefficient and wear loss of the friction pairs were obtained quantitatively,and the surface topography of the specimen was analyzed.The influence law of load,speed and ambient medium on friction coefficient and wear loss was analyzed by using orthogonal experiment method.The results show that under the same conditions,the friction coefficient of TC4 titanium alloy and ceramic is smaller,and the wear loss of 2205 duplex stainless steel and ceramic is smaller.The environmental medium has a great influence on the friction coefficient,and the load has a great influence on the wear loss.In seawater environment,the wear scar of 2205 duplex stainless steel and 316 stainless steels are relatively shallow,and the wear mechanism is the interaction of fatigue wear,abrasive wear and corrosion wear.