TC4钛合金表面微弧氧化陶瓷涂层的摩擦学行为  

Tribological Behavior of Micro-arc Oxidized Ceramic Coatings on TC4 Titanium Alloy Surfaces

作　　者：王永东[1] 刘万辉[1] 鲍爱莲[1] 

机构地区：[1]黑龙江科技学院材料学院,哈尔滨150022

出　　处：《煤矿机械》2010年第11期65-67,共3页Coal Mine Machinery

基　　金：黑龙江省教育厅科学技术研究项目资助(11521249)

摘　　要：在硅酸盐体系碱性溶液中,采用交流微弧氧化法在TC4钛合金基体上制备出氧化物陶瓷膜,并通过X射线衍射、扫描电镜分析了膜层的物相组成、微观结构和显微形貌。用HIT-2型球-盘摩擦磨损试验机对其耐磨性能进行了测试,分析陶瓷涂层的摩擦学行为。结果表明:微弧氧化陶瓷膜层同GCr15对摩钢球干摩擦时的摩擦系数仅为0.09左右,表面的磨损痕迹较轻微,磨损量较少,其磨损机制主要是磨粒磨损与黏着磨损;且由于在磨损过程中对摩材料转移到微弧氧化陶瓷层表面,在磨损后期呈现钢-钢对磨的规律;微弧氧化技术能够改善TC4钛合金基体的表面耐磨性。Ceramic coatings were formed on TC4 alloy surface by microarc oxidation in Na2SiO3 solution using an 30 kW AC power supply. The microstructure, morphology and phase composition of the coatings were analyzed by using SEM and XRD. The tribological behavior of the ceramic coatings against GCrl5 steel counterparts was evaluated on a HIT-2 model pin-on-disc friction and wear tester. The results show that the coatings are mainly composed of anatase and rutile titanium oxide. The sliding friction coefficient of MAO coatings against the GCrl5 steel shows nearly 0.09 at an applied load of 4 N. The coatings have good friction-reducing and a fair anti-wear ability in dry sliding against the steel. While the sliding, the softer GCrl5 steel is liable to transfer to the coating surface. Anti-wear ability of TC4 alloy are improved by MAO technology.

关 键 词：TC4 微弧氧化 陶瓷涂层 摩擦学 

分 类 号：TH117[机械工程—机械设计及理论]