Development of HVAF-Sprayed Novel Fe-Based Coatings for Large Area Applications
Development of HVAF-Sprayed Novel Fe-Based Coatings for Large Area Applications
复制标题
开发用于大面积应用的 HVAF 喷涂新型铁基涂层
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Sommer
中科院分区：
文献类型：
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作者：
K. Bobzin;M. Öte;M. Knoch;J. Sommer
热喷涂的一个重要趋势是新型铁基防腐蚀/磨损涂层系统的应用。这种腐蚀和磨损保护涂层的典型应用领域是造纸机的旋转干燥器。目前，这些气缸是由电弧喷涂线涂层。线电弧喷涂涂层的缺点是其具有隔热效果的高厚度和其高粗糙度。因此，为了达到所需的表面质量，需要昂贵的生产后磨削工艺。我们的目标是开发一种HVAF工艺，能够生产薄、致密和近净形的腐蚀/磨损保护涂层系统，从而显著减少后期生产时间和成本。在这项研究中，HVAF涂层工艺和一种新的铁基原料进行了研究。在第一步中，使用差示扫描量热法对铁基粉末进行热分析，以研究原料材料的凝固和熔化温度。此外，喷涂距离和粉末的进给速度对所得涂层的显微组织和孔隙率的影响进行了研究，使用光学显微镜。此外，HVAF涂层的沉积效率进行了分析，其经济效益。
One important trend in thermal spraying is the application of novel Fe-based corrosion/wear protection coating systems. A typical field of application for such corrosion and abrasive wear protection coatings are rotary dryers of paper machines. At the moment, these cylinders are coated by wire arc spraying. A disadvantage of the wire arc sprayed coatings is their high thickness, which has a heat-insulation effect, and their high roughness. Therefore, an expensive post production grinding process is necessary in order to achieve the required surface quality. The goal is to develop a HVAF process that enables the production of thin, dense and near net shape corrosion/wear protection coating systems, which significantly reduce the post-production time and costs. In this study, the HVAF coating process and a novel Fe-based feedstock material are investigated. In the first step the Fe-based powder is analysed thermally using differential scanning calorimetry, to investigate the solidification and melting temperature of the feedstock material. Furthermore, the influence of the spraying distance and the powder feed rate on the microstructure and porosity of the resulting coatings is investigated using light microscopy. Furthermore, the deposition efficiency of HVAF coatings is analysed regarding their economic efficiency.