电弧喷涂涂层及其滑动磨损行为

对电弧喷涂涂层及其摩擦学性能进行了研究。指出:钢涂层颗粒间的结合力主要是机械嵌合、分子间力等,颗粒间为氧化物和显微孔隙所分隔;QAl9-2涂层颗粒间则有较大比例的焊接结合。另外,电弧喷涂涂层中显微孔隙的存在,是使其具有优良摩擦磨损性能的主要原因,尤其在较高的滑动速度下,它的优异性能更加明显。2Cr13钢涂层的磨损机制主要为涂层颗粒的剥离磨损。

Arc Spraying Coating and Its Sliding Wear Behavior

The arc spraying coating and its tribology property are investigated in this paper. The binding force of the coating grain of steel consists of the mechanical force and the molecular force etc.. The structure of boundary of coating grain is the oxide of iron and the micro cavity. The binding force between the coating grains of QAl9 2 consists of micro welding and so on. Owing to the existence of micro hole in the coating of arc spraying, the excellent property of friction and wear can be obtained,especialy under the condition of a rapider sliding speed.The wear mechanism of coating of steel is the stripping wear of coating grain.