The pressurized induction melting of high nitrogen Fe-Cr-Mn-Ni austenite stainless steel has been tested using MgO crucible high induction furnace with nitrogen pressure 0.45-1.0 MPa between temperature 1640 (1913 K) and 1700 °C (1973 K) . The results showed that with 1.0 MPa nitrogen atmosphere at 1913 K the solubility of nitrogen in molten stainless steel Cr12

Cr17Mn5Ni5

Cr19Mn15 and Cr20Mn8 was respectively 0.391%

0.692%

1.120% and 0.899%

and it was found that to a certain extent the nitrogen dissolution in molten stainless steel deviated from Sievert

s law; while the oxygen content lower than 350 x 10

-6

with 1.0 MPa nitrogen atmosphere at 1913 K

the reaction of absorbed nitrogen in molten steel Cr20Mn8 still was first order reaction

its mass transfer coefficient was 0.023 cm▪s

-1

and with oxygen content incre

asing in molten steel the nitrogen dissolving rate and equilibrium nitrogen content in molten steel markedly decreased.