Forming limits of ultra-high strength steel can be increased significantly by warm forming operations. Beside the positive effect of reduced forming forces, also an increase of friction coefficient can be observed for elevated temperatures. For temperatures up to 600°C oils are not appropriate to decrease friction and can´t be used. Taking this into account dry lubes like graphite or boron nitride, which are temperature stable for these temperatures, have to be characterized as lubricants
Investigations on the influence of dry lubes in warm forming of high and ultra-high strength steels
Dal Mutto, Marco
2013/2014
Abstract
Forming limits of ultra-high strength steel can be increased significantly by warm forming operations. Beside the positive effect of reduced forming forces, also an increase of friction coefficient can be observed for elevated temperatures. For temperatures up to 600°C oils are not appropriate to decrease friction and can´t be used. Taking this into account dry lubes like graphite or boron nitride, which are temperature stable for these temperatures, have to be characterized as lubricantsFile in questo prodotto:
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https://hdl.handle.net/20.500.12608/17225