TY JOUR TI Advances in technological productivity of thermochemical treatment for hardfacing of high alloyed aviation steels KW gas nitriding KW microcycling KW depassivation KW nitrided case KW nitrogen potential KW degree of dissociation KW martensitic steel JO Science intensive technologies in mechanical engineering AU Petrova, L.G. AU Belashova, I.S. AU Bibikov, P.S. PY 2022 IS 2022 PB Bryansk State Technical University