| Title |
Pesearch Paper / Mechanical Behavior : The Effect of Nitrogen on Hot Ductility of Austenitic Stainless Steels |
| Authors |
심상대(Sang Dae Shim),김선구(Sun Koo Kim),이종석(Jong Seog Lee) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
An investigation has been made on the effect of nitrogen content on the hot ductility of austenitic stainless steels containing 18 wt.%Cr-8 wt.%Ni(type 304 steel) and 16.6 wt.%Cr-10.5 wt.%Ni-2 wt.%Mo (type 316 steel) in the temperature range from 900℃ to 1200℃. It was found that increasing nitrogen content in the type 316 steel decreased the hot ductility below the temperature of 1200℃ due to the decrease of stacking fault energy. In the type 304 steel containing δ-ferrite phase, hot ductility was improved with an increase in nitrogen content up to 320 ppm, as a result of decreased amount of δ-ferrite. The addition of nitrogen above 320 ppm, however, reduced the hot ductility due to the decrease in stacking fault energy. |