钛合金材料防微动磨损涂层性能研究

采用超音速火焰喷涂工艺在TC4钛合金基体材料表面制备碳化铬系耐磨涂层,通过自制微动磨损试验设备测试不同对磨副、不同位移副值试验条件下带涂层的TC4钛合金材料的摩擦因数、磨损量等微动磨损性能,利用SEM、EDS、XRD等分析手段,对比分析微动磨损表面形貌、成分和相组成的差异.结果表明:不同摩擦副和位移副值条件下的摩擦因数...

Study on Performance of Anti-fretting Wear Coating on Titanium Alloy Material

In this paper, a supersonic flame spraying process is used to prepare a chromium carbide wear-resistant coating on the surface of TC4 titanium alloy base material. The TC4 titanium alloy material with coatings is tested with different grinding pairs and different displacement values under the test conditions of different grinding pairs and different displacement pairs by self-made fretting test equipment. The fretting wear properties such as friction coefficient and wear amount are compared with the difference of fretting wear surface morphology, composition and phase composition using SEM, EDS, XRD and other analysis methods. The results show that the friction coefficient under the conditions of different friction pairs and displacement pairs increases rapidly in the initial stage, and the friction coefficient remains stable later; adding a coating on the surface of the titanium alloy is more effective than the wear pair. Coating prepared on one side can reduce the value of friction coefficient by about 20%~30%; and the fretting resistance performance of the coating prepared on both sides of the grinding pair on the TC4 titanium alloy is the best. Under the conditions of different grinding pairs, the fretting wear mechanism of TC4 titanium alloy is mainly composed of adhesive wear, abrasive wear, and oxidative wear.