【摘要】 爆炸喷涂是提高材料表面性能的表面喷涂技术之一.本文旨在通过表面喷涂提高45钢基体表面的耐磨性、耐冲击性等性能.采用爆炸喷涂方法在45钢基体材料上喷涂Al2O3陶瓷和团聚陶瓷涂层,在摩擦磨损试验机上进行Al2O3陶瓷涂层的磨损试验,X衍射仪测试涂层表面结构,JB/T7509—94铁试剂方法测试涂层的孔隙率.通过分析和比较45钢基材与爆炸喷涂Al2O3陶瓷涂层的摩擦磨损性能,实验结果表明,喷涂Al2O3陶瓷涂层可以改善基材45钢的耐磨损性能,延长其使用寿命.此外,研究发现,团聚Al2O3陶瓷涂层比Al2O3陶瓷涂层要更耐磨;而爆炸喷涂Al2O3涂层的质量要好于等离子喷涂和火焰喷涂Al2O3陶瓷涂层.更多还原

【Abstract】 Detonation-gun Spray is one of the surface coatings to improve materials surface performance.The aim is to improve the wear resistance and impact resistance of 45 steel surface by surface coating.Al2O3 ceramic coatings were deposited in 45 steel basic materials by detonation-gun spraying in order to improve wear resistance and impact resistance of 45 steel.Wear resistance of Al2O3 ceramic coatings was measured by friction and wear testing machine.Surface texture was studied by X-ray diffraction used to analyze the phase constitution.Porosity was tested by JB/T7509—94 ferron method.With analyzing the surface performances of Al2O3 ceramic coatings and 45 steel body,the results show that wear resistance of 45 steel can be improved by spraying Al2O3 ceramic coatings,and its life is extended.Then,it was discovered that reunited Al2O3 ceramic coating has stronger wear resistance than Al2O3 ceramic coating,and the performance of Al2O3 ceramic coating processed by detonation-gun spray excels its by plasma coating and flame coating.更多还原