METHOD OF MANUFACTURING PRODUCTS OF SOFT MAGNETIC ALLOY BASED ON IRON-COBALT EQUAL CHANNEL ANGULAR PRESSING Russian patent published in 2014 - IPC C22F1/16 B21C23/22 C23C28/00 

FIELD: metallurgy industry.

SUBSTANCE: method of manufacturing products of a soft magnetic alloy based on iron-cobalt equal channel angular pressing comprises sandblasting of the surface of preforms, etching in a mixture of sulphuric acid, hydrofluoric acid and nitric acid at a ratio in g/l: 550-750, 250-300, 250-300, activation of the preform surface in the hydrochloric acid solution with the concentration of at least 200 g/l, formation on the surface of the preform of a galvanic intermediate layer of nickel with the thickness of 3-5 microns, formation of the galvanic plastic layer of copper with the thickness of 80-100 microns and equal channel angular pressing of the preforms at a pressure of 1000 MPa in the temperature range of 450-500°C.

EFFECT: significant reduction in the electric potential of the surface of samples, which reduces their oxidation and enables to increase the number of passages during pressing.

1 dwg, 1 tbl, 2 ex