FIELD: mechanical engineering, method is used in production of metal working (steel and hard alloys) tools and pieces of main production. SUBSTANCE: method provides for cooling in liquid nitrogen or cooled to negative temperatures metal shots. Cooled pieces are subjected to treatment by slight periodical magnetic field and in the case generation of magnetic field is exercised in processing cycle by bipolar pulses and magnetic field in processing cycle is generated with amplitude and modulation frequency, that allows to increase static homogeneity (stability of spread in values) of operational stability. EFFECT: increased static homogeneity of operational stability. 2 cl, 2 tbl
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