摘要
采用3000 kg级氩气氛保护电渣炉分别对H13钢(w[O]=45×10-6)进行气氛保护重熔和气氛保护加金属铝重熔.实验结果表明,不加金属铝的情况下,重熔钢中氧含量(质量分数)可降至18×10-6;加铝后重熔钢中氧含量可降至10×10-6;钢中各粒度级非金属夹杂物的数量随钢中氧含量的减少而减少,而重熔过程能够有效去除钢中大尺寸(>15μm)非金属夹杂物;不加金属铝重熔的钢中氧化物夹杂主要成分为SiO2-Al2O3,与原电极中氧化物夹杂相似,加金属铝重熔的钢中氧化物夹杂主要成分为Al2O3;最后对重熔前后钢中氧化物夹杂的变化进行了热力学分析.
In this paper,a 3000 kg argon protection electroslag remelting furnace was employed to remelt H13 steel(oxygen content was 45 ppm) and remelt H13 steel with aluminum addition,respectively.Results of experiment indicated that,by PESR refining,oxygen content in H13 was reduced to 18 ppm;with aluminum addition,oxygen content in steel was reduced to 10 ppm.Based on the optical observation,the amount of inclusions was reduced with the decrement of the oxygen content,and the inclusions bigger than 15 μm were effectively removed due to oxygen decrement in steel.SEM and EDS indicated that,after remelting,without aluminum addition,the oxide inclusion was SiO2-Al2O3,similar to that in the original electrode;however,after aluminum addition,the oxide inclusion was mainly pure Al2O3.Finally,oxide transformation mechanism was explained by thermodynamic analysis.
出处
《材料与冶金学报》
CAS
北大核心
2012年第4期258-264,共7页
Journal of Materials and Metallurgy
基金
国家科技合作与交流专项项目(No.2010DFR50590)
