摘要
对钙处理工艺过程中夹杂物变性处理需要的钙含量以及硫化钙的生成条件进行了热力学计算,确定了LF处理后硫含量需控制的上限和钙处理后钙含量所需的下限;实验研究了温度和喂钙线量对钙收得率的影响以及钙处理后弱吹氩时间与钢中钙和铝的损失的关系.以理论计算和实验结果为基础,优化钙处理工艺,保证LF处理后钢液含硫不大于0.007%（质量分数）,按每炉钢喂钙线100～200 m、喂钙线后弱吹氩25 min,最终低碳冷镦钢夹杂物合格率达提高到92%.
The calcium content for inclusion distortion and the formation condition of sulfuric calcium in calcium treatment were calculated by thermodynamics method. The maximum content of sulfur after LF treatment and the minimum content of calcium after calcium treatment were determined. The effect of temperature and amount of feeding calcium on the yield of calcium and the relation between the soft argon blowing time after calcium treatment and the loss of calcium and aluminum were investigated. Based on calculation and experimental data, the process of calcium treatment was optimized, and the mass fraction of sulfur in steel after LF treatment is no more than 0. 007 %. For each heat, feeding 100 - 200 m calcium line and blowing soft argon for 25 minutes after calcium feeding, the percent of pass of inclusions in the cold heading steel can reach up to 92 %.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第8期785-788,共4页
Journal of University of Science and Technology Beijing
关键词
冷镦钢
钙处理
弱吹氩
洁净度
夹杂物
cold heading steel
calcium treatment
soft argon blowing
cleanliness
inclusions
