A.N.Safonov,V.V.Vasilcov,G.Y.Mikylshin,I.N.Ilichev,V.A.Savenkov,N.F.Zelencova,A.A.Mitrofanov.

Process of hardening of end cutting instrument with the help of continuous technological laser beam is offered. Distinctive feature of the process is that a laser beam heating is started from vertex of cutting edges and ended in tail or central parts of the instrument, thus a hardening of edges is executed in the following sequence: after heating of the first cutting edge is executed heating of symmetric to it and diametrically opposite to it cutting edge, then heating of the edge, following on perimeter after first, and again heating diametrically opposite to it and so on.