论文部分内容阅读
在实验室条件下(没有熔池搅拌,氩气保护),研究了铁液中CaSiV、CaMgSiV、CaSiBaAl及CaSi等Ca系复合合金的脱氧和脱氧产物的行为。实验发现在脱氧剂加入后50秒钟以内,脱氧产物的长大和聚集占主导地位,在此以后上浮占主导地位。在一定的时间范围内,熔池中的氧含量、脱氧时间、夹杂物的数量、夹杂的粒径及间距之间的关系可用回归方程式表达。用CaSiV脱氧时,脱氧产物中SiO_2的含量随时间增加,而FeO则减少,夹杂中CaO一般小于3％。复合合金中的V和Ba很少形成脱氧产物,V在在铁液中的回收率可达95％以上。复合合金的脱氧速度次序为:CaSiV>CaMgSiV>CaSiBaAl。当用Al预脱氧时,复合合金中的Ca对夹杂物有一定的变性作用。
The behavior of deoxidation and deoxidation products of Ca-based composite alloys such as CaSiV, CaMgSiV, CaSiBaAl and CaSi in molten iron was studied under laboratory conditions (no molten pool stirring and argon protection). Experiments found that within 50 seconds after the addition of deoxidizer, the growth and aggregation of deoxy products dominated, after which the dominance. Within a certain time range, the relationship between the oxygen content in the bath, the deoxidation time, the number of inclusions, the inclusion size and the spacing can be expressed by a regression equation. With CaSiV deoxidation, the content of SiO 2 in the deoxidation product increases with time, while the FeO decreases. The content of CaO in inclusions is generally less than 3%. V and Ba in composite alloys rarely form deoxidation products, and the recovery rate of V in molten iron can reach more than 95%. The order of deoxidation speed of composite alloy is CaSiV> CaMgSiV> CaSiBaAl. When using Al pre-deoxidation, the Ca in the composite alloy has a certain denaturing effect on the inclusions.