Thermisches Spritzen von PTA-Werkstoffsystemen

PTA材料体系的热喷涂

• 批准号: 133283007
• 负责人: Professor Dr.-Ing. Bernhard Wielage
• 金额: --
• 依托单位: Professur für Verbundwerkstoffe und Werkstoffverbunde
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/133283007?language=en
• 关键词: Thermisches; Spritzen; von; PTA; Werkstoffsystemen

In many industrial applications, HVOF-sprayed cermet coatings are used for the protection from abrasive or erosive wear stress. In the recycling of steelwork dusts by briquetting, a number of parts work under thermal, abrasive, erosive and mechanical loads which are typically combined. To enable reliable service of thermally sprayed coatings under these conditions, a maximum toler-ance towards mechanical loads must be provided by means of optimised coating adhesion. Fur-thermore, resistance against abrasives or erosives under oxidising atmospheres at elevated tem-peratures has to be ensured. Thus, the main goal is an increase in coating bond strength under the described conditions and therefore an increased damage tolerance to avoid spalling of the coating after local overstress. The application of multilayer coatings by using spray parameters that are op-timised regarding the coating residual stresses is one possible way. Additionally, enhanced adhe-sion at the inner boundaries of the coating system shall be induced by pre-annealing at working temperature under unstressed conditions.

在许多工业应用中，HVOF 喷涂金属陶瓷涂层用于防止磨料或侵蚀磨损应力。在通过压块回收钢结构粉尘的过程中，许多零件在热力、磨蚀性、侵蚀性和机械负荷下工作，这些负荷通常是组合的。为了在这些条件下实现热喷涂涂层的可靠使用，必须通过优化涂层附着力来提供对机械负载的最大耐受性。此外，必须确保在高温氧化气氛下的耐磨损性或耐腐蚀性。因此，主要目标是在所述条件下提高涂层结合强度，从而提高损伤容限以避免局部过应力后涂层剥落。通过使用针对涂层残余应力进行优化的喷涂参数来应用多层涂层是一种可能的方法。此外，在无应力条件下的工作温度下进行预退火可以增强涂层系统内边界的附着力。