George Savva¹, Tobias Brögelmann², Jessica Owens-Mawson¹, Ton Hurkmans^2
1IHI Ionbond Inc., Madison Heights, MI
²IHI Ionbond Netherlands B.V.
As greater demands are placed upon manufacturing, coatings by physical vapor deposition (PVD), chemical vapor deposition (CVD) and plasma-assisted CVD (PACVD) are in many cases essential to increase productivity and to ensure excellent product quality while minimizing production downtime and scrap rate in forming and molding tool applications.
CrN coatings with and without the addition of tungsten remains an excellent choice for many forming applications. However, the wear properties at elevated temperatures under certain tribological conditions, such as observed in high temperature Pin on Disking (POD) Testing can be improved.
One approach that can be used to improve the high temperature tribology of CrN is to deposit a Cr_xO_y or (CrW) xO_y top layer over CrN or CrWN, respectively.
This paper details the investigation of the tribological properties at room temperature, 400°C, 600°C and 800°F of CrN + Cr xO_y as well as CrWN + (CrW) xO_y deposited in commercial PVD arc chambers. The industrial applications where such coatings have benefited are in certain hot forging, die casting, and plastic molding applications.