| Title |
Deoxidation and Denitrogenization of 18% Cr - 8% Ni Stainless by Ti Addition |
| Authors |
김동식(Dong Sik Kim); 유병돈(Byung Don You); 신영길(Young Kil Shin); 이윤(Youn Lee); 윤병하(Byung Ha Youn) |
| Abstract |
The effect of titanium addition on the deoxidation and denitrogenization of stainless steel was studied by laboratory scale experiments using a 50㎏ induction furnace at 1600℃. The equilibrium dissolved oxygen content in 18%Cr-8%Ni steel containing titanium concentration between 0.1 and 0.35wt.% is in the ranges from 35 to 40 ppm in agreement with the measured values. The deoxidation products formed in liquid steel were identified as TiO and TiO₂ at the Ti concentration between 0.15 and 0.25wt.%. These oxides were found to have spherical shape of single phase with the size less than 3㎛. Titanium nitridue(TiN) of hexagonal shape was formed mainly as clusters. The top slag treatment of CaO-Al₂O₃ was found to be superior to the 100%CaO treatment in removing titanium oxides and nitrides out of the melt. |