TY JOUR TI Stage nitrogen hardening process used for reducing brittleness of alloyed nitrited steels KW nitrogenization KW alloy steel KW impact hardness KW coldbrittleness KW microstructure KW microhardness JO Science intensive technologies in mechanical engineering AU Larisa G., P.G. AU Belashova, I.S. AU Frolov, M.A. AU Malakhov, A.Y. PY 2025 IS 2025 PB Bryansk State Technical University