纳米Al_2O_3-Fe_3O_4/FeS固体润滑复合层减摩润滑机理  

Mechanism of friction reduction and lubrication of nano-Al_2O_3-Fe_3O_4/FeS solid lubrication duplex layer

作　　者：胡春华[1] 杨春燕[1] 刘庆存[1] 孙志杰[1] 马世宁[2] 乔玉林[2] 

机构地区：[1]装甲兵技术学院机械工程系,吉林长春130117 [2]装甲兵工程学院国防科技重点实验室,北京100072

出　　处：《材料热处理学报》2013年第6期130-135,共6页Transactions of Materials and Heat Treatment

基　　金：武器装备军内科研计划项目(×××11118)

摘　　要：采用离子氮碳共渗与离子渗硫复合处理技术在45钢表面形成FeS固体润滑复合层,然后采用真空浸渍方法将纳米Al2O3和Fe3O4颗粒置入复合层的微纳孔隙中,制备成纳米Al2O3-Fe3O4/FeS固体润滑复合层。在10～60 N的载荷下,纳米Al2O3-Fe3O4/FeS固体润滑复合层表现出优良的减摩与耐磨性能。这是因为,一方面磨损表面生成的化学反应膜,起到了固体润滑和阻碍摩擦表面间金属直接接触的作用;另一方面在摩擦过程中,纳米Al2O3-Fe3O4/FeS固体润滑复合层中的纳米Al2O3和Fe3O4颗粒起到了'微纳滚珠'作用,微观上将'滑动摩擦'部分转变为'滚动摩擦',且纳米颗粒预先置入复合膜层中,在摩擦过程中不易流失,延长了其'微纳滚珠'的作用,从而使其摩擦因数(载荷60 N时)及体积磨损量比涂抹纳米Al2O3/Fe3O4复合添加剂润滑的FeS固体润滑复合层分别降低了7.2%和50%。FeS solid lubrication duplex layer was prepared on the surface of 45 steel by ion nitrocarburizing-ion sulphurizing process. Then the nano-A1203 and nano-Fe3O4particles were set into the holes in micron and nano scale of the duplex layer by using vacuum dipping process to prepare the nano-A12O3-Fe3O4/FeS solid lubrication duplex layer. Friction and wear performances of the nano-Al203-Fe3O4/ FeS solid lubrication duplex layer were investigated and the excellent performances are obtained under 10 N-60 N loads. The results show that the chemical reaction films are formed, which possess the functions of solid lubrication and cumbering the direct contact of the metals between the friction surfaces. Moreover, the nano-A1203 and nano-Fe304 particles in the nano-A1203-Fe304/FeS solid lubrication duplex layer play the ＂micron and nano ball bearing＂ function, which can transform the ＂ sliding friction＂ into the ＂ rolling friction＂ in micro scale, and furthermore, the nano particles are beforehand set into the holes of the duplex layer and are difficult to run off in the friction process, which prolong their ＂micron and nano ball bearing＂ function, so the friction factor （under load 60N） and volume loss of the nano-A1203-Fe3O4/FeS solid lubrication duplex layer are 7.2% and 50% lower than those of the FeS solid lubrication duplex layer lubricated by applying nano-A1203/nano-Fe304 additive, respectively.

关 键 词：FeS固体润滑复合层 纳米Al2O3-Fe3O4 化学反应膜 减摩耐磨 润滑机理 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TH117.3[金属学及工艺—金属学]