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.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
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)
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
FeS solid lubrication duplex layer
nano-Al2 03-Fe3 04
chemical reaction film
friction reduction and wear resistance
lubrication mechanism
