用氧化钙坩埚真空感应熔炼超低氧钢的脱氧动力学  

Deoxidizing Dynamics of Refining Extra-Low Oxygen Steel during VIM in CaO Crucible

作　　者：薛正良[1] 李正邦[1] 张家雯[1] 高银露[1] 

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《钢铁研究学报》2003年第5期5-8,13,共5页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(50174048);"973"国家重大基础研究资助项目(G1998061500)

摘　　要：为了获得氧化物夹杂含量极低的超低氧钢铁材料,研究了在真空感应炉中用氧化钙坩埚冶炼钢液时在超低氧含量范围内的深脱氧动力学因素。指出,在超低氧范围内(ωTO<5×10-6)精炼钢液时,避免炉衬分解对钢液供氧是关键。炉衬材质一定时,炉衬是否向钢液供氧决定于精炼时的真空度和钢液温度。对氧化钙质炉衬而言,欲避免炉衬向钢液供氧,合理的真空度应控制在10～50Pa。为了提高在超低氧范围内碳脱氧速度,应选择浅平的熔池,并加强熔池搅拌,提高钢液中氧的表观传质系数。In order to obtain the extralow oxygen steel material with little oxide inclusion, the deoxidizing dynamics of VIM refining in CaO crucible has been researched. It is found that the key point of refining steel in the region of total oxygen content less than 0000 5 % is to avoid increasing oxygen in the molten steel due to the decomposition of lining material. For a given lining material, the vacuum and temperature of refining are decisive factor. For calcia lining, the reasonable vacuum is from 10 Pa to 50 Pa. In order to raise the deoxidizing rate by carbon in extralow oxygen region, the shallow pool and stirring are favourable to raise apparent masstransfer coefficient of oxygen in molten steel.

关 键 词：超低氧钢 氧化钙坩埚 真空脱氧 动力学 

分 类 号：TF13[冶金工程—冶金物理化学]