Study of HVOF spraying of WC–CoCr using on-line particle monitoring
Study of HVOF spraying of WC–CoCr using on-line particle monitoring
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DOI：
10.1016/j.surfcoat.2003.12.024
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发表时间：
2004-07
影响因子：
5.4
通讯作者：
Lidong Zhao;M. Maurer;F. Fischer;E. Lugscheider
中科院分区：
文献类型：
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作者：
Lidong Zhao;M. Maurer;F. Fischer;E. Lugscheider
碳化钨-钴基喷涂层广泛应用于需要耐磨、耐滑动、耐微动磨损和耐腐蚀的工业应用中。超音速火焰喷涂（HVOF）已被用于生产高质量的碳化物涂层。在这项研究中，WC-CoCr粉末喷涂使用HVOF过程。改变喷涂参数，研究其对粒子飞行性能和涂层性能的影响，使用在线粒子监测。结果表明，喷涂参数如总气体流量、喷涂距离和送粉速率对颗粒的飞行特性和涂层性能有很大影响。总的来说，存在一种趋势，即较高的总气体流速、较短的喷涂距离和较低的粉末进料速率导致较高的颗粒速度和温度以及更致密和更硬的涂层。
Tungsten carbide–cobalt based spray coatings are widely used in industry for applications requiring abrasion, sliding, fretting and erosion resistance. High velocity oxy-fuel (HVOF) flame spraying has been used for the production of high quality carbide coatings. In this study, a WC–CoCr powder was sprayed using the HVOF process. The spray parameters were varied to study their influence on the particle in-flight properties and the coating properties using on-line particle monitoring. It was found that the spray parameters such as the total gas flow rate, the spray distance and the powder feed rate could strongly influence the particle in-flight properties and the coating properties. In general, a trend existed that higher total gas flow rates, shorter spray distance and lower powder feed rates resulted in higher particle velocity and temperatures and denser and harder coatings.