TY JOUR TI Hardening of stamped steels with metal-ceramic coatings obtained by gas nitriding KW die steel KW gas nitriding KW nitrided layer KW diffusion layer JO Science intensive technologies in mechanical engineering AU Demin, P.E. AU Barabanov, S.I. AU Malakhov, A.Y. AU Alexandrov, V.A. PY 2022 IS 2022 PB Bryansk State Technical University