Investigation of an innovative method for the production of diamond reinforced coatings by HVOF and Warm Spraying for highly wear loaded surfaces (re-submission)

研究通过 HVOF 和温喷涂生产高磨损表面金刚石增强涂层的创新方法（重新提交）

• 批准号: 280831012
• 负责人: Professor Dr.-Ing. Wolfgang Tillmann
• 金额: --
• 依托单位: Lehrstuhl für Werkstofftechnologie (LWT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/280831012?language=en
• 关键词: Investigation; innovative; method; production; diamond

Diamond metal composite layers with small diamond grain sizes can be used as super wear-resistant protective layers for tools and structural components (hardfacing). Especially the high abrasive, erosive and impact loads in the field of stone processing, for example during deep drilling, lead to increased tool wear, which is beyond the capabilities of conventional wear-resistant coatings.The aim of this research project is to develop a detailed understanding of the processes and mechanisms during the thermal spraying of metallic coated diamonds as well as diamond metal powders by High Velocity Oxygen Fuel Spraying (HVOF) and Warm Spraying (WS). The methods offer, due to the combination of high kinetic and moderate thermal energy as well as the wide adjustable parameters, outstanding features for the production of diamond impregnated metal matrix composite layers. The potential of diamond metal composite layers sprayed by HVOF and WS is investigated fundamentally in model tests under realistic wear conditions. For this purpose, abrasive, erosive and impact wear conditions are considered extensive. The aim is to elucidate the wear and failure mechanisms of diamond impregnated metal matrix composite layers and to identify the influence of thermal spraying parameters. Due to the comprehensive understanding of the coating process and the wear mechanisms, it will be possible to formulate an optimal solution (coating) as a function of all parameters.

具有小金刚石晶粒尺寸的金刚石金属复合层可用作工具和结构部件的超耐磨保护层（硬面）。特别是在石材加工领域，例如深钻过程中，高磨蚀、侵蚀和冲击载荷会导致刀具磨损增加，这超出了传统耐磨涂层的能力。该研究项目的目的是开发一种详细了解通过高速氧燃料喷涂 (HVOF) 和温喷涂 (WS) 热喷涂金属涂层金刚石以及金刚石金属粉末的过程和机制。由于高动能和中等热能的结合以及宽范围的可调参数，这些方法为生产孕镶金刚石的金属基复合材料层提供了突出的特点。在实际磨损条件下的模型测试中，从根本上研究了 HVOF 和 WS 喷涂金刚石金属复合层的潜力。为此，磨损、侵蚀和冲击磨损条件被认为是广泛的。目的是阐明孕镶金刚石金属基复合材料层的磨损和失效机制，并确定热喷涂参数的影响。由于对涂层工艺和磨损机制的全面了解，将有可能根据所有参数制定最佳解决方案（涂层）。