Designs and preparation of advanced HVOF-PVD duplex coating by combination of HVOF and arc ion plating
Designs and preparation of advanced HVOF-PVD duplex coating by combination of HVOF and arc ion plating
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HVOF 与电弧离子镀相结合设计和制备先进的 HVOF-PVD 双层涂层
DOI：
10.1016/j.surfcoat.2016.06.017
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发表时间：
2016-10-25
影响因子：
5.4
通讯作者：
Meng, Xianna
中科院分区：
文献类型：
--
作者：
Chen, Wanglin;Mao, Taojie;Meng, Xianna
采用超音速火焰喷涂（HVOF）和电弧离子镀相结合的方法在中碳钢表面制备了先进的HVOF-PVD复合涂层。结果表明，复合涂层由NiCr-Cr 3C 2基超音速火焰喷涂层和PVD-AlCrN复合涂层组成，前者主要由γ-NiCr和Cr 3C 2相组成，后者由fcc-AlCrN相组成。与HVOF喷涂涂层相比，双相涂层具有更优异的耐磨性。耐磨性的提高主要与最外层的AlCrN层有关，与针对WC球的HVOF喷涂涂层相比，该层具有更优异的耐磨性。沉积在NiCr上的AlCrN层-75重量% Cr 3C 2双层涂层显示出比沉积NiCr-30 wt.%的AlCrN层更高的耐磨性Cr 3C 2复合涂层。耐磨性的提高主要与其较高的表面硬度、承载能力和结合强度有关。复合涂层的主要磨损机制为粘着磨损和氧化磨损，而单一超音速火焰喷涂NiCr-Cr 3C 2基涂层的磨损机制为粘着磨损、剥落和崩落磨损。(C)2016爱思唯尔B. V.保留所有权利。
Advanced HVOF-PVD duplex coatings were produced on the medium carbon steel by combinations of High Velocity Oxygen-Fuel (HVOF) and arc ion plating. The microstructures and mechanical properties were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) in association with mechanical property measurement The results show that the duplex coating are composed of an inner NiCr-Cr3C2-based HVOF-sprayed layer mainly consisted of gamma-NiCr and Cr3C2 phases, and an outmost PVD-AlCrN layer containing fcc-AlCrN phase. Duplex coatings reveal more excellent wear resistance when compared to the HVOF-sprayed coating. The improved wear resistance is mainly related to the outmost AlCrN layer with more excellent wear resistance in comparison to the HVOF-sprayed coating against WC ball. The AlCrN layer deposited on NiCr-75 wt.% Cr3C2 duplex coating reveals higher wear resistance than that of the AlCrN layer deposited NiCr-30 wt.% Cr3C2 duplex coating. The improvement of wear resistance is mainly associated to its higher surface hardness, load capacity and bond strength. The main wear mechanisms of the duplex coatings are adhesive and oxidation wear, whereas the ones of the single HVOF-sprayed NiCr-Cr3C2-based coating are adhesive wear as well as spalling and chipping wear. (C) 2016 Elsevier B.V. All rights reserved.