During twin roll casting the processed molten aluminum causes adhesion effects on the roller surface and makes separating layers necessary.

The presented work aims to identify suitable modifications of the roller surface, which lead to a minimization of the adhesion and the absence of separating agents. For this purpose, edge layer modifications using diffusion treatments as well as duplex treatments with hard coating are developed and investigated. In addition, the wear resistance of the roll surfaces can be increased and thus promoting the economic efficiency and environmental friendliness of this energy-efficient process.

A physical and technological modeling of the casting process intended by performing wetting tests with molten material, adhesive tensile tests and the investigation of the hot-roll cladding are keys of the developed approach. Different evaluation stages on the laboratory scale investigate the wear resistance and fatigue strength of the modifications as well as laboratory-technical casting and rolling tests with qualified surface layer modifications. The findings on the prerequisites for reducing aluminum adhesion in the tribological system "roll surface - aluminum-melt-aluminum strip" are discussed and the necessary surface properties as well.