USE OF THE SUBCRITICAL-PLASTICITY EFFECT IN MANUFACTURING PREFORMS FOR CUTTING TOOLS

Increasing the efficiency of utilization of expensive high-speed steel s is an important problem of modern production. It is solved by VAZ sp ecialists by introducing low-waste technological processes in manufact uring tool preforms. At present, side milling cutters and edging saws are blanked out from square preforms of rolled sheets. Up to 40% of th e sheet goes to waste in blanking. Gear cutters and shavers are common ly produced from forged preforms with a considerable (up to 15 mm for each dimension) size allowance for mechanical treatment. It should als o be noted that the microstructure of the forgings often contains coar se grains and grains of different sizes. The aim of the present work c onsists in determining the possibility of using deformation at a subcr itical temperature in industrial-scale production of tools (side milli ng cutters, edging saws, gear cutters, shavers).