BASE MATERIAL FOR MAKING SAW WEBS OF DISC SAWS, CUT-OFF DISCS, TIMBER SAWING TOOLS, CUTTING AND SCRAPING DEVICES Russian patent published in 1999 - IPC

FIELD: cutting and sawing equipment. SUBSTANCE: material contains base steel carburized on surfaces 2,3,4. Material is formed by two outer surfaces 2, two surfaces 3 arranged along end edges 3 and two surfaces 4 arranged along lengthwise edges. Main carbon content of material is less than 0.3%. After heat and chemical treatment base steel has at least one outer surface 2. End zones 5 of surface 2 are carburized until carbon content (0.5-1.1)%, and as carbon content reduces those zones become low carburized or non-carburized zone 6. Surfaces 3,4 of base material have sandwich structure formed by carburized end zone 5 and non-carburized zone 6. EFFECT: enhanced constructional strength of tools, operational reliability, prevention of heat release at operation, long service life at non-significant loads. 18 cl, 3 exp, 5 dwg, 3 tbl