TY - JOUR ID - 10.11933/j.issn.1007-9289.2014.06.017 TI - Structure and Properties of Al2O3-40%TiO2 Coating Prepared by Atmospheric Plasma Spraying AU - LIU Qian AU - WANG Youqiang AU - SU Xinyong AU - DONG Ning AU - HUANG Xingbao AU - LIU Jikai VL - 27 IS - 6 PB - 《中国表面工程》编辑部 SP - 135 EP - 140 PY - JF - CHINA SURFACE ENGINEERING JA - UR - http://www.csejournal.com/zgbmgcen/ch/reader/view_abstract.aspx?file_no=20140617&flag=1 KW - 大气等离子喷涂; Al2O340%TiO2涂层; 摩擦磨损 KW - atmospheric plasma spraying; Al2O340%TiO2 coating; friction and wear AB - In order to improve the performance of wear resistance and corrosion resistance of the vessel’s keyimportant parts, the atmospheric plasma spraying aluminum oxide composite coating technology was studied. The Al2O340%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 Al2O340%TiO2 coating is 687.2 HV0.1. 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. Al2O340%TiO2 coating 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 keyimportant parts. ER -