Mo对等离子喷焊Ni60A涂层组织与性能的影响

发布时间：2018-01-13 23:08

本文关键词：Mo对等离子喷焊Ni60A涂层组织与性能的影响　出处：《材料热处理学报》2016年07期 　论文类型：期刊论文

【摘要】：采用X射线衍射仪(XRD)、光学显微镜(OM)、磨料磨损试验机等,研究了以Ni60A为基体,添加不同量的Mo对等离子喷焊层组织和性能的影响。结果表明:Ni60A喷焊层中主要相为FeNi_3、Cr_7C_3、(Fe,Ni)_(23)B_6等,粗大的短棒状组织分布在镍基固溶体中;Mo的加入使等离子喷焊层中生成了大量均匀分布的MoSi_2、Mo_2C、MoC、Mo_3C_2等硬质相;喷焊层组织得到细化,形成更多的等轴晶;研究发现,MoC、Mo_2C主要由Mo_3C_2通过共析反应转变形成,Mo_xC_y相互聚集形成椭圆形碳化物;添加Mo之后喷焊层的耐磨性明显提高,Mo添加量为8%时,喷焊层的耐磨性较好,与Ni60A喷焊层相比,耐磨性提高了约30%。
[Abstract]:The Ni60A matrix was studied by means of X-ray diffractometer, optical microscope and abrasive wear tester. The effect of adding different amounts of Mo on the microstructure and properties of the plasma spray welding layer shows that the main phase in the spray welding layer is FeNiSZ _ 3Cr7C3C _ 3C _ 3. Ni)_(23)B_6 and so on, the coarse short rod-like microstructure is distributed in the nickel base solid solution; The addition of Mo makes the plasma spray welding layer produce a large number of MoSiS _ 2S _ 2S _ 2C _ C _ M _ 2C _ C _ M _ 3C _ S _ 2 and other hard phases in the plasma spray welding layer. The microstructure of spray welding layer is refined and more equiaxed crystals are formed. It is found that MoCnMo2C is mainly transformed from Mo_3C_2 through eutectoid reaction to form oval carbides. The wear resistance of spray-welding coating is obviously improved when Mo content is 8. The wear resistance of spray welding coating is better than that of Ni60A spray welding layer, and the wear resistance is about 30% higher than that of Ni60A spray welding layer.
【作者单位】：吉林大学汽车材料教育部重点实验室;
【基金】：吉林省科技厅项目(3D511AC32416)
【分类号】：TG174.4
【正文快照】： 在矿山开采、模具铸造等领域,很多零件工作环境恶劣,磨损是零件失效的主要原因之一。为了提高零件在使用过程中的耐磨性、耐蚀性,延长零件的使用寿命,研究人员采用了激光熔覆和等离子喷焊等表面改性技术。其中等离子喷焊技术具有耗材少,成本低,生产效率高,成品制备容易等优点[

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