Based on the analysis on the smelting units and processes for high nitrogen stainless steel

the mode and character of nitrogen dissolving into liquid at high temperature-high pressure and the advantage of adding nitrogen by bottom-blowing nitrogen

in laboratory the adding nitrogen test for high nitrogen stainless steel Crl8Mnl8N (/% : 0. 17C

18. 00Cr

18. 09Mn

0. 25Si

0. 010S

0. 020P

1. 07N) is carried out by a 300g liquid bottom-blowing shaped crucible with 0. 5 -1.5 MPa

nitrogen bottom-blowing rate 0. 14 ~0. 24 m

3

/h at 1 820 ~ 1 910 K. Results show that with 1. 5 MPa and nitrogen bottom-blowing rate 0. 15 m

3

/h at 1 890 K

as bottom-blowing for 20 ~30 min

the nitrogen content in liquid tends to saturation

it is available to quick-smelt high nitrogen stainless steel in which the nitrogen content is more than 1. 0%. The bottom-blowing technology has nice process effect

.