Experimental Study on the Influence of TiN/AlTiN PVD Layer on the Surface Characteristics of Hot Work Tool Steel

It is desirable to improve tool steel wear resistance produce pieces with precise dimensions and increase the lifetime of tools. The aim this work was modify surface 1.2344 (X40CrMoV5-1) hot properties. Surface modification achieved in three steps: first, hardening applied, followed by plasma nitridation and, finally, physical vapor deposition (PVD) employed a TiN/AlTiN multilayer coating. microhardness coefficient surfaces were measured. PVD coating showed highest hardness value, 2938 HV0.01, whereas resulted 2679 HV0.01. an roughness all cases compared hardened sample. However, significant decrease for treated samples. lowest K = 1.47 × 10−10 mm3/Nm, which magnitude lower than reference sample (K 6.32 10−9 mm3/Nm), employing both PVD. results confirm that use combined significantly