The thixoforming of steel places outstanding demands on the forming tools. They have to withstand high pressures during filling, high temperatures up to 1,400 deg C, and thermal shocks. On the other hand, they must have a high wear resistance and a low tendency to stick. For the thixoforming of aluminum, numerous chromium-based layers were produced using PVD technology, which showed very good results. Due to the higher temperatures of steel, thermally sprayed layers promise high application potential. This paper presents the results of the development of thermally sprayed coatings on the molds. Various metallic and ceramic layers are sprayed on using APS and subsequently compacted using HIP. The layers are analyzed with regard to their suitability for thermal, mechanical, and chemical protection. Paper includes a German-language abstract.

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