| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: procedure consists in deoxidisation of liquid metal, in its alloying with elements increasing nitrogen solubility, in blasting melt with nitrogen containing gases at intensity l/tmin at rate of saturation vN=8ù(|Cr|+|Mn|), ppm/min. Also, time of saturation is ä=[öN]/8ù(|Cr|+|Mn|), min, where: |Cr|, |Mn| are absolute values of chromium and manganese contents in melt, wt %, [öN] is amount of nitrogen introduced into melt, ppm. Gaseous nitrogen or nitrogen-oxygen mixture, or nitrogen-argon mixture are used as nitrogen containing gas. ^ EFFECT: reduced time for nitriding, wear of lining, and consumption of ferro-alloys due to reduced melting loss of alloying additions. ^ 4 cl, 3 ex |
