TY JOUR TI QUALITATIVE INDEX ASSURANCE FOR PARTS MACHINED WITH IMPREGNATED ABRASIVE TOOL KW part KW abrasive tool KW impregnation KW chromium diiodine KW durability KW structure KW structure KW surface layer KW roughness JO Bulletin of Bryansk state technical university AU Butenko, V.I. AU Gusakova, L.V. AU Durov, D.S. AU Petukhov, Y.V. PY 2021 IS 2021 PB Bryansk State Technical University