Abrasive wear behaviour of WC-CoCr and Cr3C2-20(NiCr) deposited by HVOF and detonation spray processes
Abrasive wear behaviour of WC-CoCr and Cr3C2-20(NiCr) deposited by HVOF and detonation spray processes
复制标题
DOI：
10.1016/j.surfcoat.2004.10.136
复制
发表时间：
2006-01-24
影响因子：
5.4
通讯作者：
Venkataraman, B
中科院分区：
文献类型：
--
作者：
Murthy, JKN;Venkataraman, B
热喷涂碳化钨基和碳化铬基涂层被广泛用于各种耐磨应用。这些涂层通过高速工艺沉积，如高速氧燃料（HVOF）和爆轰枪喷涂（DS）技术，可以改善磨损性能。采用HVOF法和脉冲DS法制备了WC-10Co-4Cr和Cr3C2-20（NiCr）涂层，并比较了这两种涂层的低应力磨损耐磨性。采用三体固体颗粒橡胶轮试验台，以硅粉作为磨料介质进行了磨蚀试验。结果表明，DS涂层的耐磨性略好于HVOF涂层，这可能是由于DS涂层产生了更高的残余压应力，而wc涂层的耐磨性优于cr3c2涂层。此外，相对于硬铬涂层，热喷涂碳化物基涂层具有优异的耐磨性。(c) 2004 Elsevier b.v.版权所有
Thermally sprayed tungsten carbide-based and chromium carbide-based coatings are being widely used for a variety of wear resistance applications. These coatings deposited by high velocity processes like high velocity oxy-fuel (HVOF) and detonation gun spray (DS) techniques are known to provide improved wear performance. In the present study, WC-10Co-4Cr and Cr3C2-20(NiCr) coatings are deposited by HVOF and pulsed DS processes, and low stress abrasion wear resistance of these coatings are compared. The abrasion tests were done using a three-body solid particle rubber wheel test rig using silica grits as the abrasive medium. The results show that the DS coating performs slightly better than the HVOF coating possibly due to the higher residual compressive stresses induced by the former process and WC-based coating has higher wear resistance in comparison to Cr3C2-based coating. Also, the thermally sprayed carbide-based coatings have excellent wear resistance with respect to the hard chrome coatings. (c) 2004 Elsevier B.V All rights reserved.