METHOD FOR OBTAINING MAGNETICALLY SOFT MATERIAL FOR MAGNETIC CONDUCTORS OF RELAYS Russian patent published in 2015 - IPC B22F3/12 H01F1/22 

FIELD: metallurgy.

SUBSTANCE: invention refers to powder metallurgy. A method for obtaining a magnetically soft material for magnetic conductors of relays involves preparation of charge containing iron and phosphorus, its pressing, sintering and cooling. Charge is prepared by introduction to powder of iron, which contains not more than 0.03 wt % of carbon and not more than 0.15 wt % of oxygen, phosphorus in the form of a solution of orthophosphoric acid H₃PO₃ or a powder of ferrophosphorus so that content of phosphorus in the mixture is provided in the amount of 0.5-1.5 wt %. Charge sintering is performed in vacuum of 10^-1-10^-3 Pa at the temperature of 1320-1380°C with exposure at this temperature within 1.5-4.0 hours.

EFFECT: reduction of a coercitive force, improvement of magnetic permeability and saturation induction.

10 cl, 6 dwg, 1 tbl, 6 ex