TY JOUR TI Analysis methods hardening and their influence on tribological characteristics friction units KW wear KW surface KW material KW item KW processing KW method JO Actual directions of scientific researches of the XXI century: theory and practice AU Gradyskiy, Y.. AU Karpusenko, A.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov