High-performance tool coating for press hardening of coated and uncoated ultra-high-strength sheet metal

摘要

A coating tool for hot stamping coated or uncoated sheet metal, in particular for hot stamping AlSi- or Zn-coated sheet metal, said coating tool comprising a coated substrate surface in contact with the coated or uncoated sheet metal, said A coating tool, wherein the coating of a coated substrate surface is a multilayer coating comprising one or more sub-layers and one or more upper layers, wherein the lower layers are deposited closer to the substrate surface than the upper layers; - said sub-layers are designed to provide load-bearing capacity; - said upper layers are designed to provide galling resistance, - at least one upper layer (Layer 5) having a multi-nanolayer structure formed of sub-layers of types A, B and C is deposited, the three sub-layers being deposited alternately on top of each other... /B/C/A/B/C/A... are nanolayers forming a sequence of the form, wherein at least two sequences of one A nanolayer, one B nanolayer and one C nanolayer are deposited forming a multi-nanolayer structure, - a nanolayer of type A consists of at least 90 atomic % of chromium and nitrogen, - nanolayers of type B consist of at least 90 atomic % titanium, aluminum and nitrogen, - the nanolayer of type C consists of at least 90 atomic % vanadium carbon and nitrogen, - Coating tool, characterized in that the layer thickness of the at least one upper layer (layer 5) is not less than 0.5 μm and not more than 15 μm.