氩气保护气氛对电渣重熔过程1Cr18Ni9Ti钢钛烧损的影响

Effect of Argon Shielding Atmosphere on Burning Loss of Titanium in Steel 1Cr18Ni9Ti in Electro-Slag Remelting Process

进行常规大气条件1.2t电渣炉和氩气保护气氛5.0t电渣炉重熔1 Cr18Ni9Ti奥氏体不锈钢[/%：0.05~0.09C,17.13~18.24Cr,9.73~10.6Ni,5×（C-0.02）~0.80Ti]的生产试验,分析氩气保护气氛对钢中钛烧损的影响。结果表明,在70CaF2-30Al2O3二元提纯渣配加5.0%TiO2的条件下,常规大气条件1.2 t电渣重熔锭平均钛烧损率为48.33%;氩气保护气氛5.0 t电渣重熔锭平均钛烧损率为2.61%;同时5.0 t电渣炉重熔时除用氩气保护气氛外采用同钢种底垫固渣引燃,钢锭底部涨[C]现象得到明显改善。

The pilot production of austenite stainless steel lCr18Ni9Ti[/%：0.05 ~ 0.09 C,17.13 ~ 18.24 Cr,9.73 ~ 10.6Ni,5 ×（C-0.02） ~0.80Ti]remelting by 1.2 t electro-slag furnace in normal atmospheric gas and by 5.0 t electro-slag furnace in argon shielding atmosphere is carried out to analysis the effect of argon shielding atmosphere on titanium burning loss of titanium in steel in electro-slag remelting（ESR） process.Results show that with the condition of using70CaF2-30Al2O3 binary purifying slag and adding 5.0%TiO2,for 1.2 t ESR ingot remelting in normal atmospheric gas the average titanium burning rate is 48.33%,and for 5.0 t ESR ingot remelting in argon shielding atmosphere the average titanium burning rate is 2.61%;while remelting in 5.0 t ESR furnace beside with argon shielding atmosphere,also with using same steel grade bottom pad and solid slag igniting the phenomenon of picking up carbon in bottom of ingot is obviously improved.