氩气流量、渣系和加Al粉对1Cr21Ni5Ti钢保护气氛重熔锭[Ti]的影响
2015
生产试验了氩气流量(15~45 L/min),三元(/%:63CaF2,27A1203,10CaO)、四元(/%:53CaF2,22Al203,20CaO,5MgO)和五元(/%:50CaF2,22A1203,20CaO,5MgO,3Ti02)渣系和重熔过程加Al粉对3 t保护气氛重熔1Cr21Ni5Ti钢锭[/%:0.09~0.14C,≤0.80Mn,≤0.80Si,≤0.025S,≤0.035P,4.8~5.8Ni,20~22Cr,5×(C-0.02)~0.65Ti]中[Ti]的影响。结果表明,增加氩气流量,采用五元渣系和重熔过程均匀加入Al粉可使重熔锭平均钛的烧损△[Ti]≤0.15%。采用优化工艺在6 t保护气氛电渣炉,填充比0.58,电流12 500~13 500 A,电压40~43 V,五元渣系,氩气流量30 L/min,重熔1Cr21Ni5Ti钢的结果表明,电渣锭成分稳定,C含量0.090%~0.091%;Ti含量0.46%~0.52%。
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