TY JOUR TI Investigation of laser thermal hardening effect on the hardened layer parameters and radial shaft runout KW laser thermohardening KW radial runout KW step-shaped shaft KW steel 14Cr17Ni2 KW steel 40Cr KW hardened layer KW technological parameters JO Science intensive technologies in mechanical engineering AU Loktev, A.S. AU Zavitkov, A.V. AU Pechnikov, I.S. AU Lyukhter, A.B. PY 2025 IS 2025 PB Bryansk State Technical University