Microstructure and wear properties of WC particle reinforced composite coating on Ti6Al4V alloy produced by the plasma transferred arc method
Microstructure and wear properties of WC particle reinforced composite coating on Ti6Al4V alloy produced by the plasma transferred arc method
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DOI：
10.1016/j.apsusc.2013.03.057
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发表时间：
2013-06-01
影响因子：
6.7
通讯作者：
Celik, Osman Nuri
中科院分区：
文献类型：
--
作者：
Celik, Osman Nuri
【摘要】：研究了采用等离子转移弧(PTA)方法在Ti6Al4V合金上制备的WC颗粒增强复合涂层的显微组织和磨损性能。采用氩气作为等离子气体，电弧电流分别为70 A、80 A和90 A，进行PTA处理。利用扫描电子显微镜（SEM）、X射线能谱仪（EDS）和X射线衍射（XRD）对Ti6Al4V基体表面形成的复合层的微观结构进行表征。结果表明，PTA在Ti6Al4V合金表面生成的复合层中形成了WC、TiC和W2C碳化物相。发现这些相的分布和体积分数随电弧电流值的变化而变化。磨损测试是在干滑动条件下使用线性球盘几何形状进行的。相对于 Ti6Al4V 基体，PTA 工艺生产的所有复合材料层的显微硬度和耐磨性均得到增强。复合层中碳化物相的均匀性和体积分数是提高合金耐磨性的原因。磨损测试结果表明，70 A 改性的合金比 80 A 和 90 A 改性的合金表现出更好的耐磨性。 (C) 2013 Elsevier B.V. 版权所有。
The microstructure and wear properties of a WC particle reinforced composite coating produced by the plasma transferred arc (PTA) method on Ti6Al4V alloy were investigated in this study. PTA processing was carried out using argon as the plasma gas at arc current values of 70 A, 80 A and 90 A. Scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were used to characterize the microstructure of the composite layer formed on the surface of a Ti6Al4V substrate. The results indicate that the WC, TiC and W2C carbide phases formed in the composite layers produced by PTA on the surface of the Ti6Al4V alloy. The distributions and volume fractions of these phases were found to vary with the arc current values. Wear tests were performed under dry sliding conditions using a linear ball-on-disc geometry. The microhardness and wear resistances of all of the composite layers produced by the PTA process were enhanced relative to those of the Ti6Al4V substrate. The homogeneity and volume fractions of the carbide phases in the composite layers were responsible for the improvement in the wear resistance of the alloy. The wear test results indicate that the alloy modified at 70 A shows better wear resistance than the alloys modified at 80 A and 90 A. (C) 2013 Elsevier B.V. All rights reserved.