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采用多弧离子镀技术,在4Cr13钢表面沉积CrN,并掺杂不同的Mo含量,形成CrMoN复合薄膜。研究不同Mo含量对CrMoN薄膜摩擦磨损性能的影响。通过扫描电镜、X射线衍射、显微硬度计、高速往复摩擦磨损试验机对CrMoN薄膜的成分、相结构和硬度、摩擦磨损特性及形貌进行了研究。实验结果表明:CrMoN复合薄膜形成了以NaCl型面心立方CrN结构为基础的(Cr,Mo)N结构;当Mo含量达到31.08%时,在(311)、(111)方向上出现Mo2N的衍射峰,此时薄膜出现了CrN、(Cr,Mo)N和Mo_2N相结构并存的情况;随着Mo含量的增加,薄膜的硬度先增加后减小;当Mo的含量为7.09%时,复合薄膜的硬度值最大,为2962.3HV;薄膜的磨损机理开始为粘着磨损,之后出现磨屑并破碎,出现磨粒磨损,此后磨损过程在是在粘着磨损和磨粒磨损共同作用下的结果;当Mo的含量为7.09%的CrMoN时,其摩擦系数最低约为0.4,最小磨损量为0.0223mm3。Mo含量分别为0.15%,4.23%,5.15%,14.26%,21.12%,31.08%时的CrMoN,其磨损量分别是Mo含量7.09%的CrMoN磨损量的22.12,17.83,12.88,1.44,3.43,1.22倍。
Multi-arc ion plating technology is used to deposit CrN on the surface of 4Cr13 steel and doping different Mo contents to form a CrMoN composite film. The effects of different Mo contents on the friction and wear properties of CrMoN films were investigated. The composition, phase structure and hardness, friction and wear properties and morphology of the CrMoN films were investigated by scanning electron microscopy, X-ray diffraction, microhardness tester and high speed reciprocating friction and wear testing machine. The experimental results show that (Cr, Mo) N structure based on NaCl-type face-centered cubic CrN structure is formed on the CrMoN composite film. When Mo content reaches 31.08%, the diffraction of Mo2N appears in the (111) Peak. At this time, the CrN, (Cr, Mo) N and Mo_2N coexist in the films. With the increase of Mo content, the hardness of the films first increases and then decreases. When the Mo content is 7.09% The hardness value of the film is 2962.3HV, the wear mechanism of the film begins to stick to the wear and then wear debris and broken, there is abrasive wear, then the wear process is in the adhesive wear and abrasive wear under the joint action of the results; when Mo When the content of CrMoN is 7.09%, the minimum friction coefficient is about 0.4 and the minimum wear amount is 0.0223mm3. CrMoN with Mo content of 0.15%, 4.23%, 5.15%, 14.26%, 21.12% and 31.08%, respectively, the wear amounts of CrMoN with the Mo content of 7.09% were 22.12,17.83,12.88,1.44,3.43,1.22 Times