Abstract

This paper presents the production of self-lubricating chromium carbide-25Ni+calcium fluoride multi-component layers using the HVOF spraying process. The spray powders are produced by atomization with subsequent sintering and qualification processes. The microstructure of the spray powder and layers is characterized by SEM methods. The content of added calcium fluoride in the sprayed layer is determined using the EDS method and compared with its content in the spray powder. The wear resistance is investigated using the Gray-Sand-Rubber-Real test. It turned out that atomization is a suitable method for the production of multi-component spray powders that contain solid lubricants. By adding a solid lubricant phase to the hard metal layer, the wear resistance is reduced for certain phase proportions. However, the wear resistance is at an acceptable level if layer properties such as wear resistance, corrosion resistance, and high temperature resistance are combined with one another to obtain suitable friction properties. Paper includes a German-language abstract.

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