Plasma Nitriding in Complex Post-Processing of Stainless Steel Parts Obtained by Additive Laser Technology

Abstract

Considered are the prospects of applying complex post-processing for an additive manufactured product with the deposition of a multilayer composite coating [Ti0.2C0.8/a-C]40 at the final stage. It is shown that heat treatment, finish milling, ion-plasma nitriding and burnishing with a sliding diamond indenter of a PH1 steel part obtained by selective laser melting (SLM) before deposition of a thin-film coating provides the coating with a minimum surface roughness Ra = 82-86 nm and a maximum hardness of 25.2 ± 1.4 GPa with an increase in the microhardness of the entire “coating-substrate” system. © 2021 Institute of Physics Publishing. All rights reserved.The research was funded by RFBR for Basic Research and Sverdlovsk Oblast (project No. 20-48-660065) and partially carried out within the state assignment for IMP UB RAS, theme “Structure” No. AAAA-A18-118020190116-6. The authors express particular gratitude to A.G. Merkushev and I.Y. Malygina for their participation in the work