| Abstract: |
The poster represents the research work and main results of the project which is also handed in as paper and can be summarized as following:
Recently much research work has been undertaken worldwide to develop iron base materials which can be used for thermal spraying of anti-wear coatings. Besides economical ideas exist reasons like health- and environmental aspects for the usability of iron base materials instead of Ni- or Co containing carbide coatings. Until now, however, iron base materials showed a worse life time under abrasive wear compared with conventional carbide coatings like WC/ CO or NiCr-CrC. This poster presents the research work on iron base materials. Thereby, the focus is set on high carbon containing iron-chromium base alloys which solidify under the formation of primary carbides. The material development included the study of different additional alloying elements. The relation of different chemical compositions and their typical microstructure to the wear and corrosion behaviour is also presented in this poster. To follow an integral way for the evaluation of the wear behaviour of the new material system both powders and cored-wires could be produced. Therefore the wear tests consider coatings produced via HVOF, PTA and arc-spraying.
Alloys with a high content of primary chromium carbides showed superior results under 3body wear tests. The possibility to add special carbides has a great influence on the wear- and corrosion behaviour of iron hard materials and is discussed in this poster, too.
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