FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy, in particular to methods of producing rich chromium-based alloys. It can be used for production of ligatures intended for joint alloying of steels with chromium and nitrogen. Starting material used is chromium-based alloy powder containing 59.0-89.0 wt.% of chromium, which is subjected to nitriding in an atmosphere of nitrogen-containing gas at pressure of 0.01-20.0 MPa to obtain a sintered material based on chromium mononitride (CrN) containing 11.0-19.0 wt.% of nitrogen. Obtained sintered material is crushed and subjected to leaching with a mineral acid solution to obtain an enriched powder based on chromium mononitride (CrN). Then, enriched powder is subjected to vacuum heat treatment at temperature higher than 900 °C and pressure less than 105 Pa to obtain an enriched chromium-based alloy containing 90.0-99.9% of chromium.
EFFECT: obtaining a chromium-based alloy with low content of impurities.
15 cl, 4 tbl, 1 ex
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