The effect of nitrogen partial pressure (33 ~ 100 kPa)

nitrogen blowing time (0 ~50 min)

nitrogen rate (0. 3 L/min) and liquid temperature (1 773 ~ 1 833 K) in normal atmosphere condition on nitrogen content in steel 316L (% ： 0. 31C

16. 13Cr

10. 12Ni

2. 12Mo

0. 028N) has been studied and the behavior of nitrogen absorption in steel 316L with nitrogen blowing for 40 min

2 kPa

0. 1 L/min at 1 853 ~ 1 833 K in initial vacuum condition

nitrogen blowing for 40 min

100 kPa

0. 3 L/min in middle period and nitrogen blowing for 50 min

100 kPa then natural cooling to 1 773 K in last period is tested by using silicon-molybdenum furnace with graphite crucible containing 0. 8 kg steel liquid. Results show that with increasing nitrogen blowing time and nitrogen partial pressure the nitrogen content in steel increases

the nitrogen content in liquid is more than 0. 10% as nitrogen blowing for 10 min in normal atmosphere

with increasing nitrogen rate the time that come to saturated nitrogen in liquid decreases and with decreasing temperature of liquid the solubility of nitrogen increases. The analysis on nitrogen absorption is carried out by thermodynamic and dynamic models.