| 摘要 |
The present disclosure provides a multi-layer tool piece coating. For example, the tool piece may be a mold or die used for forming ultra high strength steel sheet. The multi-layer mold coating may include a CrN or Ti(C)N junction layer, a first TiAlN/CrN nano multilayer, and a second TiAlCN/CrCN nano multilayer. The CrN or Ti(C)N junction layer may be coated on a base material of the tool piece (e.g., a mold) for forming the steel sheet. The first TiAlN/CrN nano multilayer may be coated on the CrN or Ti(C)N junction layer as an intermediate layer. The second TiAlCN/CrCN nano multilayer may be coated on the first TiAlN/CrN nano multilayer as an outermost surface functional layer, and may include carbon (C) of about 1 at. % to about 30 at. % for high temperature and low friction. |
