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Efficient Production of Novel Fe-based Coatings for Large-area Applications by Means of AC-HVAF Spraying

通过 AC-HVAF 喷涂高效生产大面积应用的新型铁基涂层

基本信息

批准号：
284041570
负责人：
Professorin Dr.-Ing. Kirsten Bobzin
金额：
--
依托单位：
Institut für Oberflächentechnik (IOT)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/284041570?language=en
关键词：
Efficient Production Novel Fe based

项目摘要

The recently developed AC-HVAF spray process provides higher particle velocities and lower particle temperatures compared to conventional HVOF spraying due to very high flow rates of compressed air. This process is suitable for spraying finer spray powders. This process is advantageous in terms of efficient production of large-area coatings because of its high spray rates. AC-HVAF spraying of novel Fe-based feedstock materials for large-area applications is not documented in literature. The purpose of this proposal is the fundamental investigation of AC-HVAF spraying of novel Fe-based feedstock materials for efficient production of wear and corrosion protective coatings in terms of large-area applications such as cylinder dryers of paper machines. The special process characteristics of the AC-HVAF will be combined with the high wear and corrosion resistance of novel Fe-based materials to achieve economic and ecologic advantages compared to established arc-sprayed Fe-based coatings as used in paper machines today. These advantages are attributed to reduced coating thickness, shorter spray time, less consumption of feedstock materials, reduced finishing work and improved thermal conductive behavior. A suitable process must be developed in order to achieve this purpose. Therefore, particle velocities and temperatures depending on process parameters and powder fractions will be investigated in the process development. Their influences on coating formation, oxidation of feedstock materials and coating microstructure will be studied. The expected advantages will be demonstrated by determination of mechanical and thermos-physical properties of the coatings and their wear and corrosion behavior in comparison with established arc-sprayed coating.

最近开发的AC-HVAF喷涂工艺与传统的HVOF喷涂相比，由于压缩空气的流速非常高，因此可提供更高的颗粒速度和更低的颗粒温度。该工艺适用于喷涂较细的喷涂粉末。由于其高喷涂速率，该方法在大面积涂层的有效生产方面是有利的。文献中没有记载用于大面积应用的新型铁基原料材料的AC-HVAF喷涂。该提案的目的是对新型铁基原料的AC-HVAF喷涂进行基础研究，以有效生产大面积应用（如造纸机的滚筒干燥器）中的耐磨和防腐蚀涂层。AC-HVAF的特殊工艺特性将与新型铁基材料的高耐磨性和耐腐蚀性相结合，与目前造纸机中使用的电弧喷涂铁基涂层相比，实现经济和生态优势。这些优点归因于减少涂层厚度、缩短喷涂时间、减少原料消耗、减少修整工作和改善导热行为。为了达到这一目的，必须制定一个适当的程序。因此，将在工艺开发中研究取决于工艺参数和粉末分数的颗粒速度和温度。研究了它们对涂层形成、原料氧化和涂层组织的影响。通过测定涂层的机械和热物理性能以及与已建立的电弧喷涂涂层相比的磨损和腐蚀行为，将证明预期的优点。