TiB_2陶瓷颗粒增强电弧喷涂涂层滑动磨损性能的研究.pdf

TiB 陶瓷颗粒增强电弧喷涂涂层滑动磨损性能的研究* 2 1 2 方建筠 , 栗卓新 ( 1. 山东电力高等专科学校, 山东 济南250002; 2. 北京工业大学 材料学院, 北京100022) : 采用电弧喷涂含T iB2 陶瓷粉末的粉芯丝材, 在低碳钢基体上制备了NiCr- T iB2 和304L- TiB2 金属基复合涂层, 在 擦磨损试验机上研究了按环/ 块线接触方式作往复运动条件下无润滑时室温 下的 擦磨损性能, 利用光学显微镜扫描电子显微镜和X 射线衍射仪对涂层的显微组织结构磨损表面 及其相组成进行分析结果表明, 涂层的相对耐磨性能远高于碳钢基体, 约为9 到11. 5 倍304L- TiB2 涂层的低磨损率除了与硬质相有关, 还和涂层具有较高的硬度有关NiCr- T iB2 涂层的耐磨性能好, 细 小的T iB2 陶瓷相在局部涂层中连成网状, 与基体结合良好, 有效提高了涂层的磨损性能 : T iB2 陶瓷; 电弧喷涂; 金属基复合涂层; 环/ 块磨损 : T G 178 : A Study on Sliding Wear Resistance of Arc Sprayed Coatings with TiB2 Ceramic Phase FANG Jia ju 1 , LI Zhuoxi 2 ( 1. Sha do g College of Elect rical Pow er, Ji a 250002, Chi a; 2. Material College of Beiji g U iversity of Tech ology , Beiji g 100022, Chi a) Abstract: Core li e sprayed by arc sprayi g w ith T iB ceramic power, a d NiCrT iB a d 304LTiB metallic matrix com 2 2 2 posit e coati g w ere prepared u der the co dit io of low carbo st eel basic body. The character of those u der the co ditio of o lubrica t a d ormal t em perat ure were studied w ith ri gblock li e co ecti g w ay by usi g attritio test i g machi e Microstructure of arc sprayed NiCrTiB , the form mecha ism of composite coati gs a d 304LT iB coati gs w ere i vestiga 2 2 ted by optic microscope, sca elect ro microscope ( SEM) a d tra smissio elect ro microscope ( T EM ) . Experime tal re sults show ed the TiB rei forced coat i gs prese t higher w ear resista ce tha that of the low carbo steel about 9 to 11. 5 2 times. Owi g to the prese ce of hard phase a d higher hard ess, 304LT iB coati g has low