大气等离子喷涂Al_2O_3-40%TiO_2涂层的组织与性能  

Structure and Properties of Al_2O_3-40%TiO_2 Coating Prepared by Atmospheric Plasma Spraying

作　　者：刘前[1] 王优强[1] 苏新勇 董宁[1] 黄兴保 刘基凯 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033 [2]青岛前进船厂,山东青岛266001

出　　处：《中国表面工程》2014年第6期135-140,共6页China Surface Engineering

基　　金：国家自然科学基金(51175275);青岛科技计划资助项目(12-1-4-4-(2)-JCH)

摘　　要：为提高舰船关重部件的耐磨损、抗腐蚀性能,开展了大气等离子喷涂氧化铝复合涂层技术研究。在45钢表面制备Al2O3-40%TiO2陶瓷涂层,通过扫描电子显微镜、显微硬度计、电子天平、摩擦磨损试验机等仪器设备,分析该涂层的显微结构,测其显微硬度、孔隙率等性能,研究其在干摩擦条件下的摩擦磨损性能。结果表明:涂层均匀致密,孔隙率为1.86%,涂层与粘结层之间有明显的倒钩镶嵌结构;Al2O3-40%TiO2涂层的平均硬度为687.2 HV0.1,同时粘结层起到了硬度梯度作用;在干摩擦条件下,45钢主要为严重的黏着磨损,而涂层的磨损主要以层状剥离为主,伴随着少量磨粒磨损,且磨损量低于45钢。在某舰艇主机正时齿轮密封失效部位表面使用Al2O3-40%TiO2涂层,大大提高了正时齿轮的使用寿命,为舰船关重部件的维修与再制造提供了技术支持和理论参考。In order to improve the performance of wear resistance and corrosion resistance of the vessel＇s key-important parts,the atmospheric plasma spraying aluminum oxide composite coating technology was studied.The Al2O3-40%TiO2 ceramic coating was prepared on the surface of 45 steel through atmospheric plasma spraying technology.The microstructure of the coating was analyzed and the microhardness and porosity were tested by scanning electron microscope,microhardness meter,electronic balance,and friction and wear testing machine,such as laboratory equipment and instrument.The performances of friction and wear of the coating were investigated in dry frictional condition.Results show that the coating is uniform density and low porosity of 1.86%.The barb mosaic structure appears between the coating and the bonding layer.The average microhardness of Al2O3-40%TiO2coating is 687.2HV0.1.Bonding layer plays a very good effect of hardness gradient at the same time.Under the condition of dry friction,the wear mechanism of 45 steel is mainly adhesive wear,the coating is given priority to layered dissection,accompanied by a small amount of abrasive wear,and the wear is less than 45 steel.Al2O3-40%TiO2coating was used on the surface of seal failure parts of timing gear in one vessel,the service life of the timing gear is significantly improved by the coating,which provide technical support and theoretical reference for repair and remanufacturing of the vessel＇s key-important parts.

关 键 词：大气等离子喷涂 Al2O3-40%TiO2涂层 摩擦磨损 

分 类 号：TG174.442[金属学及工艺—金属表面处理]