CrNi3MoVA钢表面电火花沉积W-Ni-Fe-Co涂层的摩擦磨损性能

发布时间：2018-03-31 20:35

本文选题：CrNiMoVA钢　切入点：W-Ni-Fe-Co涂层　出处：《材料导报》2017年12期

【摘要】：为进一步拓展火炮身管内膛强化手段,采用粉末冶金技术制备了W-Ni-Fe-Co合金,利用电火花表面沉积技术在CrNi3MoVA钢表面沉积了W-Ni-Fe-Co涂层,同时利用电镀技术在CrNi3MoVA钢表面制备了硬Cr涂层与之进行比较,用纳米压痕仪和摩擦磨损试验机研究了涂层的摩擦磨损性能,并利用XRD、SEM和EDS研究了沉积态和磨损后涂层的相结构、形貌及成分。结果表明电火花沉积W-Ni-Fe-Co涂层由α-W、γ-Fe和NiWO4组成,α-W在涂层中呈白亮带分布;W-Ni-Fe-Co涂层的硬度较电镀硬Cr涂层降低了18%,弹性模量较电镀硬Cr涂层提高了4%;W-Ni-Fe-Co涂层的磨损机制为轻微的粘着磨损,而电镀硬Cr涂层为严重的粘着磨损;CrNi3MoVA钢表面沉积W-Ni-Fe-Co涂层较电镀硬Cr涂层具有明显的减摩耐磨效果,随着摩擦速度的增加,W-Ni-Fe-Co涂层的摩擦系数降低,其原因是磨损表面氧化加剧,氧化物的自润滑作用加大。
[Abstract]:In order to further expand the means of strengthening the inner chamber of the gun tube, the W-Ni-Fe-Co alloy was prepared by powder metallurgy, and the W-Ni-Fe-Co coating was deposited on the surface of CrNi3MoVA steel by using the EDM surface deposition technology.At the same time, the hard Cr coating was prepared on the surface of CrNi3MoVA steel by electroplating technology. The friction and wear properties of the coating were studied by nano-indentation instrument and friction and wear tester, and the phase structure of the deposited and worn coatings were studied by XRD-SEM and EDS.Morphology and composition.The results show that the EDM W-Ni-Fe-Co coating is composed of 伪 -W- 纬 -Fe and NiWO4. The hardness of W-Ni-Fe-Co coating is 18% lower than that of hard Cr coating, and the wear mechanism of W-Ni-Fe-Co coating is slightly adhesive than that of hard Cr coating.However, the W-Ni-Fe-Co coating deposited on the surface of hard Cr coating is more adhesive than that of hard Cr coating, and the friction coefficient of W-Ni-Fe-Co coating decreases with the increase of friction speed, which is due to the increased oxidation of the worn surface.The self-lubricating effect of oxide is increased.
【作者单位】：沈阳理工大学装备工程学院;驻474军事代表室;中国人民解放军65186部队;沈阳工业大学材料科学与工程学院;
【基金】：辽宁省教育厅重点实验室基础研究项目(LZ2014013) 沈阳理工大学辽宁省兵器科学与技术重点实验室开放基金(4771004kfs25)
【分类号】：TG174.4;TJ303

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