TY JOUR TI DEVICE REALIZATION OF MAGNETIC METHOD FOR DEFINITION OF METAL STRENGTHENED LAYER THICKNESS IN ROLLING-STOCK AXLE KW knurling machine KW rest KW roller KW strengthening KW metal KW magnetic field KW electromagnet KW ferro-probe JO Bulletin of Bryansk state technical university AU Livcov, Y.V. AU Bezkorovaynyy, V.S. AU Kireev, A.N. PY 2021 IS 2021 PB Bryansk State Technical University