高频调幅磁场下无结晶器振动电磁连铸技术的实验研究  

EXPERIMENTAL STUDY ON MOLD OSCILLATION-LESS CONTINUOUS CASTING PROCESS UNDER HIGH FRE- QUENCY AMPLITUDE-MODULATED MAGNETIC FIELD

作　　者：雷作胜[1] 任忠鸣[1] 闫勇刚[1] 邓康[1] 

机构地区：[1]上海大学上海市钢铁冶金新技术应用开发重点实验室,上海200072

出　　处：《金属学报》2004年第9期995-999,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金59734080;59974017资助项目

摘　　要：研制了可以产生方波、正弦波及三角波3种波形高频调幅磁场发生器,并对其在结晶器内产生的磁场进行了测量.进行了3种波形高频调幅磁场下的无结晶器振动电磁连铸实验,结果表明:在方波、三角波和正弦波调幅磁场作用下的无结晶器振动电磁连铸过程中,当调制波频率略低于系统固有频率时,弯月面与结晶器壁间断接触距离最大,保护渣润滑效果最好,连铸过程拉坯阻力最小,连铸坯表面质量相对较好;在3种高频调幅磁场中,与三角波和方波相比,正弦波较易于减小拉坯阻力和改善铸坯表面质量.A high frequency amplitude-modulated magnetic field (AMMF) generator that can produce rectangle, triangle and sine waves has been invented, and the magnetic field inducted in the mold by the generator was measured. The amplitude-modulated magnetic field has been applied in mold oscillation-less electromagnetic continuous casting (MOLECC) process, the experiment results show that under rectangle, triangle and sine wave AMMF, when the modulated wave frequency is a little less then the intrinsic frequency of the experimental system the intermittent contacting distance is the greatest, the mold flux lubricating is the best, the continuous casting withdraw resistance is the least and the surface quality of billets is better relatively. Among the three wave types, the sine wave is better than the rectangle and triangle waves for deducing the withdraw resistance and improving the billets surface quality.

关 键 词：电磁连铸 高频调幅磁场 间断接触距离 拉坯阻力 表面质量 

分 类 号：TG249.7[金属学及工艺—铸造] TG111.4