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1265 |
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Nanocrystalline segregations causing by hybrid twin wire arc thermal spray process |
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Sven Kollinger / , Karl Holdik / Daimler AG / Vehicles Manufacturing Tribology, Germany Ulrich Heiz/ Technical University Munich / Physical Chemistry, Germany Alfons Fischer/ University Duisburg-Essen / Department for Product Engineering, Germany Mareike Hahn/ University Duisburg-Essen / Department for Product Engineering, Germany |
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Modern concepts for building high performance vehicles include the right choice of material and process. At this juncture the crankcase with its aluminium bores is subject to high loads which will increase during the next generations of car development. Current solutions like grey cast iron liners on the one hand do not fit in a stringent lightweight concept. On the other hand aluminium based liners won?t be able to sustain the increasing pressures and loads. In this case new technologies like thermal sprayed layers are needed to substitute the current technologies by building up a functional surface with being more resistant against abrasion in future types of vehicles. Nanocrystalline segregations are the key factors in receiving those enhancements of performance. In this case the hybrid twin wire arc process guarantees a complete melting of the advanced cored wire materials with generating the nano effect. The creation of homogenous and compact layer qualities is linked with the high energies of the application system. This combination of raw material and the application system ensures a fundament for building higher loaded engines. |