作　　者： ; ; ;

机构地区： 上海交通大学材料科学与工程学院

出　　处： 《表面技术》 2003年第5期56-59,62,共5页

摘　　要： 　采用超音速火焰喷涂和爆炸喷涂法在金属表面制备了WC Co单层涂层和NiCrAl/WC Co梯度涂层,对涂层的室温干摩擦磨损性能进行了测定和分析。结果表明,超音速火焰喷涂WC Co单层涂层具有最好的综合磨损性能。梯度涂层较好的结合力对摩擦磨损性能的影响只有在轻载时表现明显。涂层中原有的孔隙和摩擦过程中形成的孔洞可以在一定程度上减轻磨损,而不同条件下形成的磨屑对涂层的摩擦性能亦有较大影响。 One-layer WC-Co and NiCrAI/WC-Co graded coatings are produced on steel substrate with two thermal spray tecniques:high velocity oxy-fuel(HVOF) and detonation spray(DS).The dry sliding wear behavior of coatings are analyzed and compared.One-layer WC-Co speciment processed by HVOF exhibites the best wear resistance.The influence of better bonding strength of multi-layer coatings on sliding wear behavior is obvious only under small load.The porosity in coatings and cavity formed during friction mitigate wear to some extent.Grinding debris also affects the wear property of the coatings.

关 键 词： 爆炸喷涂 超音速火焰喷涂 摩擦磨损

领　　域： [金属学及工艺] [金属学及工艺]