Fe基非晶纳米晶涂层在油润滑条件下的耐磨损性能  

Anti-wear Properties of Fe-based Amorphous and Nanocrystalline Coating Under Oil Lubrication

作　　者：王林磊[1] 梁秀兵[1,2] 陈永雄[1] 郭伟[1] 丁华东[1] 

机构地区：[1]装甲兵工程学院再制造技术重点实验室,北京100072 [2]装甲兵工程学院科研部,北京100072

出　　处：《中国表面工程》2011年第5期45-49,共5页China Surface Engineering

基　　金：国家自然科学基金(50735006;50905185)

摘　　要：采用自动化高速电弧喷涂技术在AZ91镁合金基体上制备了厚度约为300μm的Fe基非晶纳米晶涂层。研究了Fe基非晶纳米晶涂层在油润滑条件下,不同速度(180r/min、300r/min、600r/min、900r/min、1200r/min)、载荷(2.5N、5N、10N、20N、30N)对涂层的摩擦磨损行为。采用扫描电镜、能谱分析仪、X射线衍射仪和透射电镜对涂层的组织结构进行了表征,利用纳米压痕仪对涂层的力学性能进行了分析。试验结果表明:Fe基非晶纳米晶涂层组织均匀、结构致密,氧化物含量和孔隙率低,主要由非晶相和纳米晶相组成;涂层具有较高的硬度(12.03GPa)和弹性模量(197.1GPa)。在载荷为30N、速度为300r/min、磨损时间为900s条件下,其相对耐磨性是3Cr13涂层的3倍。Fe基非晶纳米晶涂层的磨损失效机制为脆性疲劳剥落。Automatic high velocity arc spraying process was used to deposit the Fe-based amorphous and nanocrystalline coating with thickness of 300 μm on the surface of AZ91 magnesium alloy.The effect of wear parameters,such as different line speed and load,on the wear properties of Fe-based amorphous and nanocrystalline coating under oil lubrication was studied.The microstructure of the coating was characterized by the SEM,EDS,XRD and TEM.The results show that the coating was fully dense with low porosity and oxides,and exhibits the high microhardness（12.03 GPa） and Elastic modulus（197.1 GPa）.Compared with 3Cr13 coating,the relative wear resistance of Fe-based amorphous and nanocrystalline coating is 3 times than that of 3Cr13 coating with 30 N,300 r/min and 900 s under oil lubrication.The Fe-based amorphous and nanocrystalline coating exhibits the brittle spalling failure mechanism.

关 键 词：高速电弧喷涂 铁基非晶纳米晶 涂层 油润滑 耐磨损性能 

分 类 号：TG135.6[一般工业技术—材料科学与工程]