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

• 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

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.

由于压缩空气流速非常高，与传统的 HVOF 喷涂相比，最近开发的 AC-HVAF 喷涂工艺可提供更高的颗粒速度和更低的颗粒温度。该工艺适合喷涂较细的喷涂粉末。由于喷涂速率高，该工艺在大面积涂层的高效生产方面具有优势。文献中没有记载用于大面积应用的新型铁基原料的 AC-HVAF 喷涂。本提案的目的是对新型铁基原料的 AC-HVAF 喷涂进行基础研究，以便在造纸机的滚筒干燥机等大面积应用中高效生产耐磨和腐蚀防护涂层。 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，与当今造纸机中使用的现有电弧喷涂铁基涂层相比，实现经济和生态优势。这些优点归因于涂层厚度的减小、喷涂时间的缩短、原料消耗的减少、精加工工作的减少以及导热性能的改善。为了实现这一目的，必须开发合适的工艺。因此，在工艺开发中将研究取决于工艺参数和粉末分数的颗粒速度和温度。将研究它们对涂层形成、原料氧化和涂层微观结构的影响。与已建立的电弧喷涂涂层相比，通过确定涂层的机械和热物理性能及其磨损和腐蚀行为，将证明预期的优点。

项目成果

Influence of Powder Size on the Corrosion and Wear Behavior of HVAF-Sprayed Fe-Based Coatings

• DOI: 10.1007/s11666-018-0819-7
• 发表时间: 2018
• 期刊: Journal of Thermal Spray Technology
• 影响因子: 3.1
• 作者: K. Bobzin;M. Öte;M. Knoch;J. Sommer

Novel Fe-based and HVAF-sprayed coating systems for large area applications

适用于大面积应用的新型铁基和 HVAF 喷涂系统

• DOI: 10.1088/1757-899x/480/1/012005
• 发表时间: 2019
• 期刊: IOP Conference Series: Materials Science and Engineering
• 作者: K. Bobzin;M. Öte;M. A. Knoch;J. Sommer
• 通讯作者: J. Sommer

Impact resistance of WC-Co reinforced HVAF-sprayed FeCrB-coatings

• DOI: 10.1088/1757-899x/1147/1/012028
• 发表时间: 2021-01-01
• 期刊: 22ND CHEMNITZ SEMINAR ON MATERIALS ENGINEERING - 22. WERKSTOFFTECHNISCHES KOLLOQUIUM (WTK 2021)
• 作者: Bobzin, K.;Wietheger, W.;Schulz, M.
• 通讯作者: Schulz, M.

Influence of powder feed rate on corrosion and wear properties of Fe-based HVAF coatings

送粉速度对铁基HVAF涂层腐蚀磨损性能的影响

• DOI: 10.1088/1757-899x/373/1/012012
• 发表时间: 2018
• 期刊: IOP Conference Series: Materials Science and Engineering
• 作者: K. Bobzin;M. Öte;M. A. Knoch;J. Sommer
• 通讯作者: J. Sommer