0. 03 ~0. 08Ce) as a heat resistance austenite stainless steel is developed by adding nitrogen and Ce. Because of low melting point of this steel
the fluidity of molten steel is poor. Consequently
the addition of nitrogen and Ce is a difficult problem. The adding RE method
the deoxidization process and the model for N2 content control are studied. With process measures including using N2 stirring in whole AOD process and using Ar stirring 1. 8 ~2. 2 m3/t before AOD taping to decrease nitrogen
and decreasing [O
]
to 15 x 10
-6
~20 x 10
-6
and feeding Ce coils 13 m/t in the steel at LF
the 253MA stainless steel can be produced commercially.