For the processing of soft materials, where adhesive wear is the dominant problem, Argor-Aljba is presenting a solution that can significantly improve tool lifetime using the ta-C DLC layer. As is explained, these layers are highly wear-resistant and can also withstand partially abrasive materials such as aluminum with high silicon content. Moreover, they achieve an extremely low coefficient of friction by virtue of an almost superconducting property. This is claimed to prevent the formation of chipping knives and the subsequent breaking out of tool cutting edges. Thanks to these properties, layer thicknesses of 0.5 to 1 micrometer are customary for these tools. The Swiss exhibitors are specialized in so-called DLC (diamond-like carbon). The best DLC layers for the above applications are said to be ta-C DLC layers that have a diamond content of over 50 percent. The company's Dialong layer is reportedly at the peak of the DLC layers currently available, with around 80 percent amorphous diamond content, which is also evident from the high hardness of 5,300 HV. Recently, a new coating technology has been developed that allows tougher and, above all, smoother ta-C DLC coatings. This innovative Dropless technology allows a high diamond content of around 90 percent, making the layer increasingly transparent and compact. This achieves a hardness of 6,500 HV at a layer thickness of 0.3 to 0.5 micrometer.
Trends Cutting Tools
DLC coating for processing greasy and abrasive materials
The coating technology from Argor-Aljba increases the performance of tools and components.
19 Jun. 2017
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