连铸结晶器非正弦振动振幅的确定  

Determination of Non-Sinusoidal Oscillation Amplitude for Casting Mold

作　　者：孟祥宁[1] 朱苗勇[1] 刘旭东[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004

出　　处：《特殊钢》2007年第2期13-15,共3页Special Steel

摘　　要：利用结晶器液体摩擦力模型,结合具有最佳振动模式特点的非正弦振动形式,分析了2．0 m／min拉速时非正弦振动振幅对液体摩擦力的影响,给出了振幅选取原则和确定方法。通过对连铸1 270 mm×210 mm SPHC钢(≤0．08％C)的计算结果表明:振动采用小振幅能限制最大液体摩擦力,增大保护渣耗量,减少负滑脱时间;选定2．0m／min拉速,适宜振幅为±4 mm;随拉速提高振幅适当增大,可适时改善振动效果。The effect of non-sinusoidal oscillation amplitude on liquid friction force in mold with casting speed 2. 0 m/min has been analyzed by a mathematical model of liquid friction combined a non-sinusoidal oscillation waveform with optimum mode virtue to get amplitude selection principle and determination method. The calculated results for 1 270 mm × 210 mm cast bloom of SPHC steel （≤0.08C） showed that the maximum liquid friction force could be restricted by applied small amplitude, increased flux consumption, decreased negative strip time, and defined optimum amplitude ± 4 mm at cast speed 2. 0 m/min ; and amplitude should be increased suitably with increasing cast speed in order to improve oscillation effect at real time.

关 键 词：连铸结晶器 非正弦振动 振幅 液体摩擦力 保护渣膜 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]