TY JOUR TI Hardening of a quick-speed steel tool through nitration process with nitrogen controlled potential KW high-speed steel KW toolpiece KW gas nitriding KW nitration case KW nitrogen potential JO Science intensive technologies in mechanical engineering AU Petrova, L.G. AU Alexandrov, V.A. AU Vdovin, V.M. AU Demin, P.E. PY 2022 IS 2022 PB Bryansk State Technical University